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SP/web2py/gluon/contrib/pypyodbc.py

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2018-10-25 15:33:07 +00:00
# -*- coding: utf-8 -*-
# PyPyODBC is develped from RealPyODBC 0.1 beta released in 2004 by Michele Petrazzo. Thanks Michele.
# The MIT License (MIT)
#
# Copyright (c) 2014 Henry Zhou <jiangwen365@gmail.com> and PyPyODBC contributors
# Copyright (c) 2004 Michele Petrazzo
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
# documentation files (the "Software"), to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all copies or substantial portions
# of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
# THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
# CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
pooling = True
apilevel = '2.0'
paramstyle = 'qmark'
threadsafety = 1
version = '1.3.3'
lowercase=True
DEBUG = 0
# Comment out all "if DEBUG:" statements like below for production
#if DEBUG:print 'DEBUGGING'
import sys, os, datetime, ctypes, threading
from decimal import Decimal
py_ver = sys.version[:3]
py_v3 = py_ver >= '3.0'
if py_v3:
long = int
unicode = str
str_8b = bytes
buffer = memoryview
BYTE_1 = bytes('1','ascii')
use_unicode = True
else:
str_8b = str
BYTE_1 = '1'
use_unicode = False
if py_ver < '2.6':
bytearray = str
if not hasattr(ctypes, 'c_ssize_t'):
if ctypes.sizeof(ctypes.c_uint) == ctypes.sizeof(ctypes.c_void_p):
ctypes.c_ssize_t = ctypes.c_int
elif ctypes.sizeof(ctypes.c_ulong) == ctypes.sizeof(ctypes.c_void_p):
ctypes.c_ssize_t = ctypes.c_long
elif ctypes.sizeof(ctypes.c_ulonglong) == ctypes.sizeof(ctypes.c_void_p):
ctypes.c_ssize_t = ctypes.c_longlong
lock = threading.Lock()
shared_env_h = None
SQLWCHAR_SIZE = ctypes.sizeof(ctypes.c_wchar)
#determin the size of Py_UNICODE
#sys.maxunicode > 65536 and 'UCS4' or 'UCS2'
UNICODE_SIZE = sys.maxunicode > 65536 and 4 or 2
# Define ODBC constants. They are widly used in ODBC documents and programs
# They are defined in cpp header files: sql.h sqlext.h sqltypes.h sqlucode.h
# and you can get these files from the mingw32-runtime_3.13-1_all.deb package
SQL_ATTR_ODBC_VERSION, SQL_OV_ODBC2, SQL_OV_ODBC3 = 200, 2, 3
SQL_DRIVER_NOPROMPT = 0
SQL_ATTR_CONNECTION_POOLING = 201; SQL_CP_ONE_PER_HENV = 2
SQL_FETCH_NEXT, SQL_FETCH_FIRST, SQL_FETCH_LAST = 0x01, 0x02, 0x04
SQL_NULL_HANDLE, SQL_HANDLE_ENV, SQL_HANDLE_DBC, SQL_HANDLE_STMT = 0, 1, 2, 3
SQL_SUCCESS, SQL_SUCCESS_WITH_INFO, SQL_ERROR = 0, 1, -1
SQL_NO_DATA = 100; SQL_NO_TOTAL = -4
SQL_ATTR_ACCESS_MODE = SQL_ACCESS_MODE = 101
SQL_ATTR_AUTOCOMMIT = SQL_AUTOCOMMIT = 102
SQL_MODE_DEFAULT = SQL_MODE_READ_WRITE = 0; SQL_MODE_READ_ONLY = 1
SQL_AUTOCOMMIT_OFF, SQL_AUTOCOMMIT_ON = 0, 1
SQL_IS_UINTEGER = -5
SQL_ATTR_LOGIN_TIMEOUT = 103; SQL_ATTR_CONNECTION_TIMEOUT = 113;SQL_ATTR_QUERY_TIMEOUT = 0
SQL_COMMIT, SQL_ROLLBACK = 0, 1
SQL_INDEX_UNIQUE,SQL_INDEX_ALL = 0,1
SQL_QUICK,SQL_ENSURE = 0,1
SQL_FETCH_NEXT = 1
SQL_COLUMN_DISPLAY_SIZE = 6
SQL_INVALID_HANDLE = -2
SQL_NO_DATA_FOUND = 100; SQL_NULL_DATA = -1; SQL_NTS = -3
SQL_HANDLE_DESCR = 4
SQL_TABLE_NAMES = 3
SQL_PARAM_INPUT = 1; SQL_PARAM_INPUT_OUTPUT = 2
SQL_PARAM_TYPE_UNKNOWN = 0
SQL_RESULT_COL = 3
SQL_PARAM_OUTPUT = 4
SQL_RETURN_VALUE = 5
SQL_PARAM_TYPE_DEFAULT = SQL_PARAM_INPUT_OUTPUT
SQL_RESET_PARAMS = 3
SQL_UNBIND = 2
SQL_CLOSE = 0
# Below defines The constants for sqlgetinfo method, and their coresponding return types
SQL_QUALIFIER_LOCATION = 114
SQL_QUALIFIER_NAME_SEPARATOR = 41
SQL_QUALIFIER_TERM = 42
SQL_QUALIFIER_USAGE = 92
SQL_OWNER_TERM = 39
SQL_OWNER_USAGE = 91
SQL_ACCESSIBLE_PROCEDURES = 20
SQL_ACCESSIBLE_TABLES = 19
SQL_ACTIVE_ENVIRONMENTS = 116
SQL_AGGREGATE_FUNCTIONS = 169
SQL_ALTER_DOMAIN = 117
SQL_ALTER_TABLE = 86
SQL_ASYNC_MODE = 10021
SQL_BATCH_ROW_COUNT = 120
SQL_BATCH_SUPPORT = 121
SQL_BOOKMARK_PERSISTENCE = 82
SQL_CATALOG_LOCATION = SQL_QUALIFIER_LOCATION
SQL_CATALOG_NAME = 10003
SQL_CATALOG_NAME_SEPARATOR = SQL_QUALIFIER_NAME_SEPARATOR
SQL_CATALOG_TERM = SQL_QUALIFIER_TERM
SQL_CATALOG_USAGE = SQL_QUALIFIER_USAGE
SQL_COLLATION_SEQ = 10004
SQL_COLUMN_ALIAS = 87
SQL_CONCAT_NULL_BEHAVIOR = 22
SQL_CONVERT_FUNCTIONS = 48
SQL_CONVERT_VARCHAR = 70
SQL_CORRELATION_NAME = 74
SQL_CREATE_ASSERTION = 127
SQL_CREATE_CHARACTER_SET = 128
SQL_CREATE_COLLATION = 129
SQL_CREATE_DOMAIN = 130
SQL_CREATE_SCHEMA = 131
SQL_CREATE_TABLE = 132
SQL_CREATE_TRANSLATION = 133
SQL_CREATE_VIEW = 134
SQL_CURSOR_COMMIT_BEHAVIOR = 23
SQL_CURSOR_ROLLBACK_BEHAVIOR = 24
SQL_DATABASE_NAME = 16
SQL_DATA_SOURCE_NAME = 2
SQL_DATA_SOURCE_READ_ONLY = 25
SQL_DATETIME_LITERALS = 119
SQL_DBMS_NAME = 17
SQL_DBMS_VER = 18
SQL_DDL_INDEX = 170
SQL_DEFAULT_TXN_ISOLATION = 26
SQL_DESCRIBE_PARAMETER = 10002
SQL_DM_VER = 171
SQL_DRIVER_NAME = 6
SQL_DRIVER_ODBC_VER = 77
SQL_DRIVER_VER = 7
SQL_DROP_ASSERTION = 136
SQL_DROP_CHARACTER_SET = 137
SQL_DROP_COLLATION = 138
SQL_DROP_DOMAIN = 139
SQL_DROP_SCHEMA = 140
SQL_DROP_TABLE = 141
SQL_DROP_TRANSLATION = 142
SQL_DROP_VIEW = 143
SQL_DYNAMIC_CURSOR_ATTRIBUTES1 = 144
SQL_DYNAMIC_CURSOR_ATTRIBUTES2 = 145
SQL_EXPRESSIONS_IN_ORDERBY = 27
SQL_FILE_USAGE = 84
SQL_FORWARD_ONLY_CURSOR_ATTRIBUTES1 = 146
SQL_FORWARD_ONLY_CURSOR_ATTRIBUTES2 = 147
SQL_GETDATA_EXTENSIONS = 81
SQL_GROUP_BY = 88
SQL_IDENTIFIER_CASE = 28
SQL_IDENTIFIER_QUOTE_CHAR = 29
SQL_INDEX_KEYWORDS = 148
SQL_INFO_SCHEMA_VIEWS = 149
SQL_INSERT_STATEMENT = 172
SQL_INTEGRITY = 73
SQL_KEYSET_CURSOR_ATTRIBUTES1 = 150
SQL_KEYSET_CURSOR_ATTRIBUTES2 = 151
SQL_KEYWORDS = 89
SQL_LIKE_ESCAPE_CLAUSE = 113
SQL_MAX_ASYNC_CONCURRENT_STATEMENTS = 10022
SQL_MAX_BINARY_LITERAL_LEN = 112
SQL_MAX_CATALOG_NAME_LEN = 34
SQL_MAX_CHAR_LITERAL_LEN = 108
SQL_MAX_COLUMNS_IN_GROUP_BY = 97
SQL_MAX_COLUMNS_IN_INDEX = 98
SQL_MAX_COLUMNS_IN_ORDER_BY = 99
SQL_MAX_COLUMNS_IN_SELECT = 100
SQL_MAX_COLUMNS_IN_TABLE = 101
SQL_MAX_COLUMN_NAME_LEN = 30
SQL_MAX_CONCURRENT_ACTIVITIES = 1
SQL_MAX_CURSOR_NAME_LEN = 31
SQL_MAX_DRIVER_CONNECTIONS = 0
SQL_MAX_IDENTIFIER_LEN = 10005
SQL_MAX_INDEX_SIZE = 102
SQL_MAX_PROCEDURE_NAME_LEN = 33
SQL_MAX_ROW_SIZE = 104
SQL_MAX_ROW_SIZE_INCLUDES_LONG = 103
SQL_MAX_SCHEMA_NAME_LEN = 32
SQL_MAX_STATEMENT_LEN = 105
SQL_MAX_TABLES_IN_SELECT = 106
SQL_MAX_TABLE_NAME_LEN = 35
SQL_MAX_USER_NAME_LEN = 107
SQL_MULTIPLE_ACTIVE_TXN = 37
SQL_MULT_RESULT_SETS = 36
SQL_NEED_LONG_DATA_LEN = 111
SQL_NON_NULLABLE_COLUMNS = 75
SQL_NULL_COLLATION = 85
SQL_NUMERIC_FUNCTIONS = 49
SQL_ODBC_INTERFACE_CONFORMANCE = 152
SQL_ODBC_VER = 10
SQL_OJ_CAPABILITIES = 65003
SQL_ORDER_BY_COLUMNS_IN_SELECT = 90
SQL_PARAM_ARRAY_ROW_COUNTS = 153
SQL_PARAM_ARRAY_SELECTS = 154
SQL_PROCEDURES = 21
SQL_PROCEDURE_TERM = 40
SQL_QUOTED_IDENTIFIER_CASE = 93
SQL_ROW_UPDATES = 11
SQL_SCHEMA_TERM = SQL_OWNER_TERM
SQL_SCHEMA_USAGE = SQL_OWNER_USAGE
SQL_SCROLL_OPTIONS = 44
SQL_SEARCH_PATTERN_ESCAPE = 14
SQL_SERVER_NAME = 13
SQL_SPECIAL_CHARACTERS = 94
SQL_SQL92_DATETIME_FUNCTIONS = 155
SQL_SQL92_FOREIGN_KEY_DELETE_RULE = 156
SQL_SQL92_FOREIGN_KEY_UPDATE_RULE = 157
SQL_SQL92_GRANT = 158
SQL_SQL92_NUMERIC_VALUE_FUNCTIONS = 159
SQL_SQL92_PREDICATES = 160
SQL_SQL92_RELATIONAL_JOIN_OPERATORS = 161
SQL_SQL92_REVOKE = 162
SQL_SQL92_ROW_VALUE_CONSTRUCTOR = 163
SQL_SQL92_STRING_FUNCTIONS = 164
SQL_SQL92_VALUE_EXPRESSIONS = 165
SQL_SQL_CONFORMANCE = 118
SQL_STANDARD_CLI_CONFORMANCE = 166
SQL_STATIC_CURSOR_ATTRIBUTES1 = 167
SQL_STATIC_CURSOR_ATTRIBUTES2 = 168
SQL_STRING_FUNCTIONS = 50
SQL_SUBQUERIES = 95
SQL_SYSTEM_FUNCTIONS = 51
SQL_TABLE_TERM = 45
SQL_TIMEDATE_ADD_INTERVALS = 109
SQL_TIMEDATE_DIFF_INTERVALS = 110
SQL_TIMEDATE_FUNCTIONS = 52
SQL_TXN_CAPABLE = 46
SQL_TXN_ISOLATION_OPTION = 72
SQL_UNION = 96
SQL_USER_NAME = 47
SQL_XOPEN_CLI_YEAR = 10000
aInfoTypes = {
SQL_ACCESSIBLE_PROCEDURES : 'GI_YESNO',SQL_ACCESSIBLE_TABLES : 'GI_YESNO',SQL_ACTIVE_ENVIRONMENTS : 'GI_USMALLINT',
SQL_AGGREGATE_FUNCTIONS : 'GI_UINTEGER',SQL_ALTER_DOMAIN : 'GI_UINTEGER',
SQL_ALTER_TABLE : 'GI_UINTEGER',SQL_ASYNC_MODE : 'GI_UINTEGER',SQL_BATCH_ROW_COUNT : 'GI_UINTEGER',
SQL_BATCH_SUPPORT : 'GI_UINTEGER',SQL_BOOKMARK_PERSISTENCE : 'GI_UINTEGER',SQL_CATALOG_LOCATION : 'GI_USMALLINT',
SQL_CATALOG_NAME : 'GI_YESNO',SQL_CATALOG_NAME_SEPARATOR : 'GI_STRING',SQL_CATALOG_TERM : 'GI_STRING',
SQL_CATALOG_USAGE : 'GI_UINTEGER',SQL_COLLATION_SEQ : 'GI_STRING',SQL_COLUMN_ALIAS : 'GI_YESNO',
SQL_CONCAT_NULL_BEHAVIOR : 'GI_USMALLINT',SQL_CONVERT_FUNCTIONS : 'GI_UINTEGER',SQL_CONVERT_VARCHAR : 'GI_UINTEGER',
SQL_CORRELATION_NAME : 'GI_USMALLINT',SQL_CREATE_ASSERTION : 'GI_UINTEGER',SQL_CREATE_CHARACTER_SET : 'GI_UINTEGER',
SQL_CREATE_COLLATION : 'GI_UINTEGER',SQL_CREATE_DOMAIN : 'GI_UINTEGER',SQL_CREATE_SCHEMA : 'GI_UINTEGER',
SQL_CREATE_TABLE : 'GI_UINTEGER',SQL_CREATE_TRANSLATION : 'GI_UINTEGER',SQL_CREATE_VIEW : 'GI_UINTEGER',
SQL_CURSOR_COMMIT_BEHAVIOR : 'GI_USMALLINT',SQL_CURSOR_ROLLBACK_BEHAVIOR : 'GI_USMALLINT',SQL_DATABASE_NAME : 'GI_STRING',
SQL_DATA_SOURCE_NAME : 'GI_STRING',SQL_DATA_SOURCE_READ_ONLY : 'GI_YESNO',SQL_DATETIME_LITERALS : 'GI_UINTEGER',
SQL_DBMS_NAME : 'GI_STRING',SQL_DBMS_VER : 'GI_STRING',SQL_DDL_INDEX : 'GI_UINTEGER',
SQL_DEFAULT_TXN_ISOLATION : 'GI_UINTEGER',SQL_DESCRIBE_PARAMETER : 'GI_YESNO',SQL_DM_VER : 'GI_STRING',
SQL_DRIVER_NAME : 'GI_STRING',SQL_DRIVER_ODBC_VER : 'GI_STRING',SQL_DRIVER_VER : 'GI_STRING',SQL_DROP_ASSERTION : 'GI_UINTEGER',
SQL_DROP_CHARACTER_SET : 'GI_UINTEGER', SQL_DROP_COLLATION : 'GI_UINTEGER',SQL_DROP_DOMAIN : 'GI_UINTEGER',
SQL_DROP_SCHEMA : 'GI_UINTEGER',SQL_DROP_TABLE : 'GI_UINTEGER',SQL_DROP_TRANSLATION : 'GI_UINTEGER',
SQL_DROP_VIEW : 'GI_UINTEGER',SQL_DYNAMIC_CURSOR_ATTRIBUTES1 : 'GI_UINTEGER',SQL_DYNAMIC_CURSOR_ATTRIBUTES2 : 'GI_UINTEGER',
SQL_EXPRESSIONS_IN_ORDERBY : 'GI_YESNO',SQL_FILE_USAGE : 'GI_USMALLINT',
SQL_FORWARD_ONLY_CURSOR_ATTRIBUTES1 : 'GI_UINTEGER',SQL_FORWARD_ONLY_CURSOR_ATTRIBUTES2 : 'GI_UINTEGER',
SQL_GETDATA_EXTENSIONS : 'GI_UINTEGER',SQL_GROUP_BY : 'GI_USMALLINT',SQL_IDENTIFIER_CASE : 'GI_USMALLINT',
SQL_IDENTIFIER_QUOTE_CHAR : 'GI_STRING',SQL_INDEX_KEYWORDS : 'GI_UINTEGER',SQL_INFO_SCHEMA_VIEWS : 'GI_UINTEGER',
SQL_INSERT_STATEMENT : 'GI_UINTEGER',SQL_INTEGRITY : 'GI_YESNO',SQL_KEYSET_CURSOR_ATTRIBUTES1 : 'GI_UINTEGER',
SQL_KEYSET_CURSOR_ATTRIBUTES2 : 'GI_UINTEGER',SQL_KEYWORDS : 'GI_STRING',
SQL_LIKE_ESCAPE_CLAUSE : 'GI_YESNO',SQL_MAX_ASYNC_CONCURRENT_STATEMENTS : 'GI_UINTEGER',
SQL_MAX_BINARY_LITERAL_LEN : 'GI_UINTEGER',SQL_MAX_CATALOG_NAME_LEN : 'GI_USMALLINT',
SQL_MAX_CHAR_LITERAL_LEN : 'GI_UINTEGER',SQL_MAX_COLUMNS_IN_GROUP_BY : 'GI_USMALLINT',
SQL_MAX_COLUMNS_IN_INDEX : 'GI_USMALLINT',SQL_MAX_COLUMNS_IN_ORDER_BY : 'GI_USMALLINT',
SQL_MAX_COLUMNS_IN_SELECT : 'GI_USMALLINT',SQL_MAX_COLUMNS_IN_TABLE : 'GI_USMALLINT',
SQL_MAX_COLUMN_NAME_LEN : 'GI_USMALLINT',SQL_MAX_CONCURRENT_ACTIVITIES : 'GI_USMALLINT',
SQL_MAX_CURSOR_NAME_LEN : 'GI_USMALLINT',SQL_MAX_DRIVER_CONNECTIONS : 'GI_USMALLINT',
SQL_MAX_IDENTIFIER_LEN : 'GI_USMALLINT',SQL_MAX_INDEX_SIZE : 'GI_UINTEGER',
SQL_MAX_PROCEDURE_NAME_LEN : 'GI_USMALLINT',SQL_MAX_ROW_SIZE : 'GI_UINTEGER',
SQL_MAX_ROW_SIZE_INCLUDES_LONG : 'GI_YESNO',SQL_MAX_SCHEMA_NAME_LEN : 'GI_USMALLINT',
SQL_MAX_STATEMENT_LEN : 'GI_UINTEGER',SQL_MAX_TABLES_IN_SELECT : 'GI_USMALLINT',
SQL_MAX_TABLE_NAME_LEN : 'GI_USMALLINT',SQL_MAX_USER_NAME_LEN : 'GI_USMALLINT',
SQL_MULTIPLE_ACTIVE_TXN : 'GI_YESNO',SQL_MULT_RESULT_SETS : 'GI_YESNO',
SQL_NEED_LONG_DATA_LEN : 'GI_YESNO',SQL_NON_NULLABLE_COLUMNS : 'GI_USMALLINT',
SQL_NULL_COLLATION : 'GI_USMALLINT',SQL_NUMERIC_FUNCTIONS : 'GI_UINTEGER',
SQL_ODBC_INTERFACE_CONFORMANCE : 'GI_UINTEGER',SQL_ODBC_VER : 'GI_STRING',SQL_OJ_CAPABILITIES : 'GI_UINTEGER',
SQL_ORDER_BY_COLUMNS_IN_SELECT : 'GI_YESNO',SQL_PARAM_ARRAY_ROW_COUNTS : 'GI_UINTEGER',
SQL_PARAM_ARRAY_SELECTS : 'GI_UINTEGER',SQL_PROCEDURES : 'GI_YESNO',SQL_PROCEDURE_TERM : 'GI_STRING',
SQL_QUOTED_IDENTIFIER_CASE : 'GI_USMALLINT',SQL_ROW_UPDATES : 'GI_YESNO',SQL_SCHEMA_TERM : 'GI_STRING',
SQL_SCHEMA_USAGE : 'GI_UINTEGER',SQL_SCROLL_OPTIONS : 'GI_UINTEGER',SQL_SEARCH_PATTERN_ESCAPE : 'GI_STRING',
SQL_SERVER_NAME : 'GI_STRING',SQL_SPECIAL_CHARACTERS : 'GI_STRING',SQL_SQL92_DATETIME_FUNCTIONS : 'GI_UINTEGER',
SQL_SQL92_FOREIGN_KEY_DELETE_RULE : 'GI_UINTEGER',SQL_SQL92_FOREIGN_KEY_UPDATE_RULE : 'GI_UINTEGER',
SQL_SQL92_GRANT : 'GI_UINTEGER',SQL_SQL92_NUMERIC_VALUE_FUNCTIONS : 'GI_UINTEGER',
SQL_SQL92_PREDICATES : 'GI_UINTEGER',SQL_SQL92_RELATIONAL_JOIN_OPERATORS : 'GI_UINTEGER',
SQL_SQL92_REVOKE : 'GI_UINTEGER',SQL_SQL92_ROW_VALUE_CONSTRUCTOR : 'GI_UINTEGER',
SQL_SQL92_STRING_FUNCTIONS : 'GI_UINTEGER',SQL_SQL92_VALUE_EXPRESSIONS : 'GI_UINTEGER',
SQL_SQL_CONFORMANCE : 'GI_UINTEGER',SQL_STANDARD_CLI_CONFORMANCE : 'GI_UINTEGER',
SQL_STATIC_CURSOR_ATTRIBUTES1 : 'GI_UINTEGER',SQL_STATIC_CURSOR_ATTRIBUTES2 : 'GI_UINTEGER',
SQL_STRING_FUNCTIONS : 'GI_UINTEGER',SQL_SUBQUERIES : 'GI_UINTEGER',
SQL_SYSTEM_FUNCTIONS : 'GI_UINTEGER',SQL_TABLE_TERM : 'GI_STRING',SQL_TIMEDATE_ADD_INTERVALS : 'GI_UINTEGER',
SQL_TIMEDATE_DIFF_INTERVALS : 'GI_UINTEGER',SQL_TIMEDATE_FUNCTIONS : 'GI_UINTEGER',
SQL_TXN_CAPABLE : 'GI_USMALLINT',SQL_TXN_ISOLATION_OPTION : 'GI_UINTEGER',
SQL_UNION : 'GI_UINTEGER',SQL_USER_NAME : 'GI_STRING',SQL_XOPEN_CLI_YEAR : 'GI_STRING',
}
#Definations for types
BINARY = bytearray
Binary = bytearray
DATETIME = datetime.datetime
Date = datetime.date
Time = datetime.time
Timestamp = datetime.datetime
STRING = str
NUMBER = float
ROWID = int
DateFromTicks = datetime.date.fromtimestamp
TimeFromTicks = lambda x: datetime.datetime.fromtimestamp(x).time()
TimestampFromTicks = datetime.datetime.fromtimestamp
#Define exceptions
class OdbcNoLibrary(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)
class OdbcLibraryError(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)
class OdbcInvalidHandle(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)
class OdbcGenericError(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)
class Warning(Exception):
def __init__(self, error_code, error_desc):
self.value = (error_code, error_desc)
self.args = (error_code, error_desc)
class Error(Exception):
def __init__(self, error_code, error_desc):
self.value = (error_code, error_desc)
self.args = (error_code, error_desc)
class InterfaceError(Error):
def __init__(self, error_code, error_desc):
self.value = (error_code, error_desc)
self.args = (error_code, error_desc)
class DatabaseError(Error):
def __init__(self, error_code, error_desc):
self.value = (error_code, error_desc)
self.args = (error_code, error_desc)
class InternalError(DatabaseError):
def __init__(self, error_code, error_desc):
self.value = (error_code, error_desc)
self.args = (error_code, error_desc)
class ProgrammingError(DatabaseError):
def __init__(self, error_code, error_desc):
self.value = (error_code, error_desc)
self.args = (error_code, error_desc)
class DataError(DatabaseError):
def __init__(self, error_code, error_desc):
self.value = (error_code, error_desc)
self.args = (error_code, error_desc)
class IntegrityError(DatabaseError):
def __init__(self, error_code, error_desc):
self.value = (error_code, error_desc)
self.args = (error_code, error_desc)
class NotSupportedError(Error):
def __init__(self, error_code, error_desc):
self.value = (error_code, error_desc)
self.args = (error_code, error_desc)
class OperationalError(DatabaseError):
def __init__(self, error_code, error_desc):
self.value = (error_code, error_desc)
self.args = (error_code, error_desc)
############################################################################
#
# Find the ODBC library on the platform and connect to it using ctypes
#
############################################################################
# Get the References of the platform's ODBC functions via ctypes
odbc_decoding = 'utf_16'
odbc_encoding = 'utf_16_le'
ucs_length = 2
if sys.platform in ('win32','cli'):
ODBC_API = ctypes.windll.odbc32
# On Windows, the size of SQLWCHAR is hardcoded to 2-bytes.
SQLWCHAR_SIZE = ctypes.sizeof(ctypes.c_ushort)
else:
# Set load the library on linux
try:
# First try direct loading libodbc.so
ODBC_API = ctypes.cdll.LoadLibrary('libodbc.so')
except:
# If direct loading libodbc.so failed
# We try finding the libodbc.so by using find_library
from ctypes.util import find_library
library = find_library('odbc')
if library is None:
# If find_library still can not find the library
# we try finding it manually from where libodbc.so usually appears
lib_paths = ("/usr/lib/libodbc.so","/usr/lib/i386-linux-gnu/libodbc.so","/usr/lib/x86_64-linux-gnu/libodbc.so","/usr/lib/libiodbc.dylib")
lib_paths = [path for path in lib_paths if os.path.exists(path)]
if len(lib_paths) == 0 :
raise OdbcNoLibrary('ODBC Library is not found. Is LD_LIBRARY_PATH set?')
else:
library = lib_paths[0]
# Then we try loading the found libodbc.so again
try:
ODBC_API = ctypes.cdll.LoadLibrary(library)
except:
# If still fail loading, abort.
raise OdbcLibraryError('Error while loading ' + library)
# only iODBC uses utf-32 / UCS4 encoding data, others normally use utf-16 / UCS2
# So we set those for handling.
if 'libiodbc.dylib' in library:
odbc_decoding = 'utf_32'
odbc_encoding = 'utf_32_le'
ucs_length = 4
# unixODBC defaults to 2-bytes SQLWCHAR, unless "-DSQL_WCHART_CONVERT" was
# added to CFLAGS, in which case it will be the size of wchar_t.
# Note that using 4-bytes SQLWCHAR will break most ODBC drivers, as driver
# development mostly targets the Windows platform.
if py_v3:
from subprocess import getstatusoutput
else:
from commands import getstatusoutput
status, output = getstatusoutput('odbc_config --cflags')
if status == 0 and 'SQL_WCHART_CONVERT' in output:
SQLWCHAR_SIZE = ctypes.sizeof(ctypes.c_wchar)
else:
SQLWCHAR_SIZE = ctypes.sizeof(ctypes.c_ushort)
create_buffer_u = ctypes.create_unicode_buffer
create_buffer = ctypes.create_string_buffer
wchar_pointer = ctypes.c_wchar_p
UCS_buf = lambda s: s
def UCS_dec(buffer):
i = 0
uchars = []
while True:
uchar = buffer.raw[i:i + ucs_length].decode(odbc_decoding)
if uchar == unicode('\x00'):
break
uchars.append(uchar)
i += ucs_length
return ''.join(uchars)
from_buffer_u = lambda buffer: buffer.value
# This is the common case on Linux, which uses wide Python build together with
# the default unixODBC without the "-DSQL_WCHART_CONVERT" CFLAGS.
if sys.platform not in ('win32','cli'):
if UNICODE_SIZE >= SQLWCHAR_SIZE:
# We can only use unicode buffer if the size of wchar_t (UNICODE_SIZE) is
# the same as the size expected by the driver manager (SQLWCHAR_SIZE).
create_buffer_u = create_buffer
wchar_pointer = ctypes.c_char_p
def UCS_buf(s):
return s.encode(odbc_encoding)
from_buffer_u = UCS_dec
# Exoteric case, don't really care.
elif UNICODE_SIZE < SQLWCHAR_SIZE:
raise OdbcLibraryError('Using narrow Python build with ODBC library '
'expecting wide unicode is not supported.')
############################################################
# Database value to Python data type mappings
SQL_TYPE_NULL = 0
SQL_DECIMAL = 3
SQL_FLOAT = 6
SQL_DATE = 9
SQL_TIME = 10
SQL_TIMESTAMP = 11
SQL_VARCHAR = 12
SQL_LONGVARCHAR = -1
SQL_VARBINARY = -3
SQL_LONGVARBINARY = -4
SQL_BIGINT = -5
SQL_WVARCHAR = -9
SQL_WLONGVARCHAR = -10
SQL_ALL_TYPES = 0
SQL_SIGNED_OFFSET = -20
SQL_SS_VARIANT = -150
SQL_SS_UDT = -151
SQL_SS_XML = -152
SQL_SS_TIME2 = -154
SQL_C_CHAR = SQL_CHAR = 1
SQL_C_NUMERIC = SQL_NUMERIC = 2
SQL_C_LONG = SQL_INTEGER = 4
SQL_C_SLONG = SQL_C_LONG + SQL_SIGNED_OFFSET
SQL_C_SHORT = SQL_SMALLINT = 5
SQL_C_FLOAT = SQL_REAL = 7
SQL_C_DOUBLE = SQL_DOUBLE = 8
SQL_C_TYPE_DATE = SQL_TYPE_DATE = 91
SQL_C_TYPE_TIME = SQL_TYPE_TIME = 92
SQL_C_BINARY = SQL_BINARY = -2
SQL_C_SBIGINT = SQL_BIGINT + SQL_SIGNED_OFFSET
SQL_C_TINYINT = SQL_TINYINT = -6
SQL_C_BIT = SQL_BIT = -7
SQL_C_WCHAR = SQL_WCHAR = -8
SQL_C_GUID = SQL_GUID = -11
SQL_C_TYPE_TIMESTAMP = SQL_TYPE_TIMESTAMP = 93
SQL_C_DEFAULT = 99
SQL_DESC_DISPLAY_SIZE = SQL_COLUMN_DISPLAY_SIZE
def dttm_cvt(x):
if py_v3:
x = x.decode('ascii')
if x == '': return None
x = x.ljust(26,'0')
return datetime.datetime(int(x[0:4]),int(x[5:7]),int(x[8:10]),int(x[10:13]),int(x[14:16]),int(x[17:19]),int(x[20:26]))
def tm_cvt(x):
if py_v3:
x = x.decode('ascii')
if x == '': return None
x = x.ljust(15,'0')
return datetime.time(int(x[0:2]),int(x[3:5]),int(x[6:8]),int(x[9:15]))
def dt_cvt(x):
if py_v3:
x = x.decode('ascii')
if x == '': return None
else:return datetime.date(int(x[0:4]),int(x[5:7]),int(x[8:10]))
def Decimal_cvt(x):
if py_v3:
x = x.decode('ascii')
return Decimal(x)
bytearray_cvt = bytearray
if sys.platform == 'cli':
bytearray_cvt = lambda x: bytearray(buffer(x))
# Below Datatype mappings referenced the document at
# http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.sdk_12.5.1.aseodbc/html/aseodbc/CACFDIGH.htm
SQL_data_type_dict = { \
#SQL Data TYPE 0.Python Data Type 1.Default Output Converter 2.Buffer Type 3.Buffer Allocator 4.Default Size 5.Variable Length
SQL_TYPE_NULL : (None, lambda x: None, SQL_C_CHAR, create_buffer, 2 , False ),
SQL_CHAR : (str, lambda x: x, SQL_C_CHAR, create_buffer, 2048 , False ),
SQL_NUMERIC : (Decimal, Decimal_cvt, SQL_C_CHAR, create_buffer, 150 , False ),
SQL_DECIMAL : (Decimal, Decimal_cvt, SQL_C_CHAR, create_buffer, 150 , False ),
SQL_INTEGER : (int, int, SQL_C_CHAR, create_buffer, 150 , False ),
SQL_SMALLINT : (int, int, SQL_C_CHAR, create_buffer, 150 , False ),
SQL_FLOAT : (float, float, SQL_C_CHAR, create_buffer, 150 , False ),
SQL_REAL : (float, float, SQL_C_CHAR, create_buffer, 150 , False ),
SQL_DOUBLE : (float, float, SQL_C_CHAR, create_buffer, 200 , False ),
SQL_DATE : (datetime.date, dt_cvt, SQL_C_CHAR, create_buffer, 30 , False ),
SQL_TIME : (datetime.time, tm_cvt, SQL_C_CHAR, create_buffer, 20 , False ),
SQL_SS_TIME2 : (datetime.time, tm_cvt, SQL_C_CHAR, create_buffer, 20 , False ),
SQL_TIMESTAMP : (datetime.datetime, dttm_cvt, SQL_C_CHAR, create_buffer, 30 , False ),
SQL_VARCHAR : (str, lambda x: x, SQL_C_CHAR, create_buffer, 2048 , False ),
SQL_LONGVARCHAR : (str, lambda x: x, SQL_C_CHAR, create_buffer, 20500 , True ),
SQL_BINARY : (bytearray, bytearray_cvt, SQL_C_BINARY, create_buffer, 5120 , True ),
SQL_VARBINARY : (bytearray, bytearray_cvt, SQL_C_BINARY, create_buffer, 5120 , True ),
SQL_LONGVARBINARY : (bytearray, bytearray_cvt, SQL_C_BINARY, create_buffer, 20500 , True ),
SQL_BIGINT : (long, long, SQL_C_CHAR, create_buffer, 150 , False ),
SQL_TINYINT : (int, int, SQL_C_CHAR, create_buffer, 150 , False ),
SQL_BIT : (bool, lambda x:x == BYTE_1, SQL_C_CHAR, create_buffer, 2 , False ),
SQL_WCHAR : (unicode, lambda x: x, SQL_C_WCHAR, create_buffer_u, 2048 , False ),
SQL_WVARCHAR : (unicode, lambda x: x, SQL_C_WCHAR, create_buffer_u, 2048 , False ),
SQL_GUID : (str, str, SQL_C_CHAR, create_buffer, 2048 , False ),
SQL_WLONGVARCHAR : (unicode, lambda x: x, SQL_C_WCHAR, create_buffer_u, 20500 , True ),
SQL_TYPE_DATE : (datetime.date, dt_cvt, SQL_C_CHAR, create_buffer, 30 , False ),
SQL_TYPE_TIME : (datetime.time, tm_cvt, SQL_C_CHAR, create_buffer, 20 , False ),
SQL_TYPE_TIMESTAMP : (datetime.datetime, dttm_cvt, SQL_C_CHAR, create_buffer, 30 , False ),
SQL_SS_VARIANT : (str, lambda x: x, SQL_C_CHAR, create_buffer, 2048 , True ),
SQL_SS_XML : (unicode, lambda x: x, SQL_C_WCHAR, create_buffer_u, 20500 , True ),
SQL_SS_UDT : (bytearray, bytearray_cvt, SQL_C_BINARY, create_buffer, 5120 , True ),
}
"""
Types mapping, applicable for 32-bit and 64-bit Linux / Windows / Mac OS X.
SQLPointer -> ctypes.c_void_p
SQLCHAR * -> ctypes.c_char_p
SQLWCHAR * -> ctypes.c_wchar_p on Windows, ctypes.c_char_p with unixODBC
SQLINT -> ctypes.c_int
SQLSMALLINT -> ctypes.c_short
SQMUSMALLINT -> ctypes.c_ushort
SQLLEN -> ctypes.c_ssize_t
SQLULEN -> ctypes.c_size_t
SQLRETURN -> ctypes.c_short
"""
# Define the python return type for ODBC functions with ret result.
funcs_with_ret = [
"SQLAllocHandle",
"SQLBindParameter",
"SQLBindCol",
"SQLCloseCursor",
"SQLColAttribute",
"SQLColumns",
"SQLColumnsW",
"SQLConnect",
"SQLConnectW",
"SQLDataSources",
"SQLDataSourcesW",
"SQLDescribeCol",
"SQLDescribeColW",
"SQLDescribeParam",
"SQLDisconnect",
"SQLDriverConnect",
"SQLDriverConnectW",
"SQLDrivers",
"SQLDriversW",
"SQLEndTran",
"SQLExecDirect",
"SQLExecDirectW",
"SQLExecute",
"SQLFetch",
"SQLFetchScroll",
"SQLForeignKeys",
"SQLForeignKeysW",
"SQLFreeHandle",
"SQLFreeStmt",
"SQLGetData",
"SQLGetDiagRec",
"SQLGetDiagRecW",
"SQLGetInfo",
"SQLGetInfoW",
"SQLGetTypeInfo",
"SQLMoreResults",
"SQLNumParams",
"SQLNumResultCols",
"SQLPrepare",
"SQLPrepareW",
"SQLPrimaryKeys",
"SQLPrimaryKeysW",
"SQLProcedureColumns",
"SQLProcedureColumnsW",
"SQLProcedures",
"SQLProceduresW",
"SQLRowCount",
"SQLSetConnectAttr",
"SQLSetEnvAttr",
"SQLStatistics",
"SQLStatisticsW",
"SQLTables",
"SQLTablesW",
"SQLSetStmtAttr"
]
for func_name in funcs_with_ret:
getattr(ODBC_API, func_name).restype = ctypes.c_short
if sys.platform not in ('cli'):
#Seems like the IronPython can not declare ctypes.POINTER type arguments
ODBC_API.SQLAllocHandle.argtypes = [
ctypes.c_short, ctypes.c_void_p, ctypes.POINTER(ctypes.c_void_p),
]
ODBC_API.SQLBindParameter.argtypes = [
ctypes.c_void_p, ctypes.c_ushort, ctypes.c_short,
ctypes.c_short, ctypes.c_short, ctypes.c_size_t,
ctypes.c_short, ctypes.c_void_p, ctypes.c_ssize_t, ctypes.POINTER(ctypes.c_ssize_t),
]
ODBC_API.SQLColAttribute.argtypes = [
ctypes.c_void_p, ctypes.c_ushort, ctypes.c_ushort,
ctypes.c_void_p, ctypes.c_short, ctypes.POINTER(ctypes.c_short), ctypes.POINTER(ctypes.c_ssize_t),
]
ODBC_API.SQLDataSources.argtypes = [
ctypes.c_void_p, ctypes.c_ushort, ctypes.c_char_p,
ctypes.c_short, ctypes.POINTER(ctypes.c_short),
ctypes.c_char_p, ctypes.c_short, ctypes.POINTER(ctypes.c_short),
]
ODBC_API.SQLDescribeCol.argtypes = [
ctypes.c_void_p, ctypes.c_ushort, ctypes.c_char_p, ctypes.c_short,
ctypes.POINTER(ctypes.c_short), ctypes.POINTER(ctypes.c_short),
ctypes.POINTER(ctypes.c_size_t), ctypes.POINTER(ctypes.c_short), ctypes.POINTER(ctypes.c_short),
]
ODBC_API.SQLDescribeParam.argtypes = [
ctypes.c_void_p, ctypes.c_ushort,
ctypes.POINTER(ctypes.c_short), ctypes.POINTER(ctypes.c_size_t),
ctypes.POINTER(ctypes.c_short), ctypes.POINTER(ctypes.c_short),
]
ODBC_API.SQLDriverConnect.argtypes = [
ctypes.c_void_p, ctypes.c_void_p, ctypes.c_char_p,
ctypes.c_short, ctypes.c_char_p, ctypes.c_short,
ctypes.POINTER(ctypes.c_short), ctypes.c_ushort,
]
ODBC_API.SQLDrivers.argtypes = [
ctypes.c_void_p, ctypes.c_ushort,
ctypes.c_char_p, ctypes.c_short, ctypes.POINTER(ctypes.c_short),
ctypes.c_char_p, ctypes.c_short, ctypes.POINTER(ctypes.c_short),
]
ODBC_API.SQLGetData.argtypes = [
ctypes.c_void_p, ctypes.c_ushort, ctypes.c_short,
ctypes.c_void_p, ctypes.c_ssize_t, ctypes.POINTER(ctypes.c_ssize_t),
]
ODBC_API.SQLGetDiagRec.argtypes = [
ctypes.c_short, ctypes.c_void_p, ctypes.c_short,
ctypes.c_char_p, ctypes.POINTER(ctypes.c_int),
ctypes.c_char_p, ctypes.c_short, ctypes.POINTER(ctypes.c_short),
]
ODBC_API.SQLGetInfo.argtypes = [
ctypes.c_void_p, ctypes.c_ushort, ctypes.c_void_p,
ctypes.c_short, ctypes.POINTER(ctypes.c_short),
]
ODBC_API.SQLRowCount.argtypes = [
ctypes.c_void_p, ctypes.POINTER(ctypes.c_ssize_t),
]
ODBC_API.SQLNumParams.argtypes = [
ctypes.c_void_p, ctypes.POINTER(ctypes.c_short),
]
ODBC_API.SQLNumResultCols.argtypes = [
ctypes.c_void_p, ctypes.POINTER(ctypes.c_short),
]
ODBC_API.SQLCloseCursor.argtypes = [ctypes.c_void_p]
ODBC_API.SQLColumns.argtypes = [
ctypes.c_void_p, ctypes.c_char_p, ctypes.c_short,
ctypes.c_char_p, ctypes.c_short, ctypes.c_char_p,
ctypes.c_short, ctypes.c_char_p, ctypes.c_short,
]
ODBC_API.SQLConnect.argtypes = [
ctypes.c_void_p, ctypes.c_char_p, ctypes.c_short,
ctypes.c_char_p, ctypes.c_short, ctypes.c_char_p, ctypes.c_short,
]
ODBC_API.SQLDisconnect.argtypes = [ctypes.c_void_p]
ODBC_API.SQLEndTran.argtypes = [
ctypes.c_short, ctypes.c_void_p, ctypes.c_short,
]
ODBC_API.SQLExecute.argtypes = [ctypes.c_void_p]
ODBC_API.SQLExecDirect.argtypes = [
ctypes.c_void_p, ctypes.c_char_p, ctypes.c_int,
]
ODBC_API.SQLFetch.argtypes = [ctypes.c_void_p]
ODBC_API.SQLFetchScroll.argtypes = [
ctypes.c_void_p, ctypes.c_short, ctypes.c_ssize_t,
]
ODBC_API.SQLForeignKeys.argtypes = [
ctypes.c_void_p, ctypes.c_char_p, ctypes.c_short,
ctypes.c_char_p, ctypes.c_short, ctypes.c_char_p,
ctypes.c_short, ctypes.c_char_p, ctypes.c_short,
ctypes.c_char_p, ctypes.c_short, ctypes.c_char_p, ctypes.c_short,
]
ODBC_API.SQLFreeHandle.argtypes = [
ctypes.c_short, ctypes.c_void_p,
]
ODBC_API.SQLFreeStmt.argtypes = [
ctypes.c_void_p, ctypes.c_ushort,
]
ODBC_API.SQLGetTypeInfo.argtypes = [
ctypes.c_void_p, ctypes.c_short,
]
ODBC_API.SQLMoreResults.argtypes = [ctypes.c_void_p]
ODBC_API.SQLPrepare.argtypes = [
ctypes.c_void_p, ctypes.c_char_p, ctypes.c_int,
]
ODBC_API.SQLPrimaryKeys.argtypes = [
ctypes.c_void_p, ctypes.c_char_p, ctypes.c_short,
ctypes.c_char_p, ctypes.c_short, ctypes.c_char_p, ctypes.c_short,
]
ODBC_API.SQLProcedureColumns.argtypes = [
ctypes.c_void_p, ctypes.c_char_p, ctypes.c_short,
ctypes.c_char_p, ctypes.c_short, ctypes.c_char_p,
ctypes.c_short, ctypes.c_char_p, ctypes.c_short,
]
ODBC_API.SQLProcedures.argtypes = [
ctypes.c_void_p, ctypes.c_char_p, ctypes.c_short,
ctypes.c_char_p, ctypes.c_short, ctypes.c_char_p, ctypes.c_short,
]
ODBC_API.SQLSetConnectAttr.argtypes = [
ctypes.c_void_p, ctypes.c_int, ctypes.c_void_p, ctypes.c_int,
]
ODBC_API.SQLSetEnvAttr.argtypes = [
ctypes.c_void_p, ctypes.c_int, ctypes.c_void_p, ctypes.c_int,
]
ODBC_API.SQLStatistics.argtypes = [
ctypes.c_void_p, ctypes.c_char_p, ctypes.c_short,
ctypes.c_char_p, ctypes.c_short, ctypes.c_char_p,
ctypes.c_short, ctypes.c_ushort, ctypes.c_ushort,
]
ODBC_API.SQLTables.argtypes = [
ctypes.c_void_p, ctypes.c_char_p, ctypes.c_short,
ctypes.c_char_p, ctypes.c_short, ctypes.c_char_p,
ctypes.c_short, ctypes.c_char_p, ctypes.c_short,
]
def to_wchar(argtypes):
if argtypes: # Under IronPython some argtypes are not declared
result = []
for x in argtypes:
if x == ctypes.c_char_p:
result.append(wchar_pointer)
else:
result.append(x)
return result
else:
return argtypes
ODBC_API.SQLColumnsW.argtypes = to_wchar(ODBC_API.SQLColumns.argtypes)
ODBC_API.SQLConnectW.argtypes = to_wchar(ODBC_API.SQLConnect.argtypes)
ODBC_API.SQLDataSourcesW.argtypes = to_wchar(ODBC_API.SQLDataSources.argtypes)
ODBC_API.SQLDescribeColW.argtypes = to_wchar(ODBC_API.SQLDescribeCol.argtypes)
ODBC_API.SQLDriverConnectW.argtypes = to_wchar(ODBC_API.SQLDriverConnect.argtypes)
ODBC_API.SQLDriversW.argtypes = to_wchar(ODBC_API.SQLDrivers.argtypes)
ODBC_API.SQLExecDirectW.argtypes = to_wchar(ODBC_API.SQLExecDirect.argtypes)
ODBC_API.SQLForeignKeysW.argtypes = to_wchar(ODBC_API.SQLForeignKeys.argtypes)
ODBC_API.SQLPrepareW.argtypes = to_wchar(ODBC_API.SQLPrepare.argtypes)
ODBC_API.SQLPrimaryKeysW.argtypes = to_wchar(ODBC_API.SQLPrimaryKeys.argtypes)
ODBC_API.SQLProcedureColumnsW.argtypes = to_wchar(ODBC_API.SQLProcedureColumns.argtypes)
ODBC_API.SQLProceduresW.argtypes = to_wchar(ODBC_API.SQLProcedures.argtypes)
ODBC_API.SQLStatisticsW.argtypes = to_wchar(ODBC_API.SQLStatistics.argtypes)
ODBC_API.SQLTablesW.argtypes = to_wchar(ODBC_API.SQLTables.argtypes)
ODBC_API.SQLGetDiagRecW.argtypes = to_wchar(ODBC_API.SQLGetDiagRec.argtypes)
ODBC_API.SQLGetInfoW.argtypes = to_wchar(ODBC_API.SQLGetInfo.argtypes)
# Set the alias for the ctypes functions for beter code readbility or performance.
ADDR = ctypes.byref
c_short = ctypes.c_short
c_ssize_t = ctypes.c_ssize_t
SQLFetch = ODBC_API.SQLFetch
SQLExecute = ODBC_API.SQLExecute
SQLBindParameter = ODBC_API.SQLBindParameter
SQLGetData = ODBC_API.SQLGetData
SQLRowCount = ODBC_API.SQLRowCount
SQLNumResultCols = ODBC_API.SQLNumResultCols
SQLEndTran = ODBC_API.SQLEndTran
# Set alias for beter code readbility or performance.
NO_FREE_STATEMENT = 0
FREE_STATEMENT = 1
BLANK_BYTE = str_8b()
def ctrl_err(ht, h, val_ret, ansi):
"""Classify type of ODBC error from (type of handle, handle, return value)
, and raise with a list"""
if ansi:
state = create_buffer(22)
Message = create_buffer(1024*4)
ODBC_func = ODBC_API.SQLGetDiagRec
if py_v3:
raw_s = lambda s: bytes(s,'ascii')
else:
raw_s = str_8b
else:
state = create_buffer_u(22)
Message = create_buffer_u(1024*4)
ODBC_func = ODBC_API.SQLGetDiagRecW
raw_s = unicode
NativeError = ctypes.c_int()
Buffer_len = c_short()
err_list = []
number_errors = 1
while 1:
ret = ODBC_func(ht, h, number_errors, state, \
ADDR(NativeError), Message, 1024, ADDR(Buffer_len))
if ret == SQL_NO_DATA_FOUND:
#No more data, I can raise
#print(err_list[0][1])
state = err_list[0][0]
err_text = raw_s('[')+state+raw_s('] ')+err_list[0][1]
if state[:2] in (raw_s('24'),raw_s('25'),raw_s('42')):
raise ProgrammingError(state,err_text)
elif state[:2] in (raw_s('22')):
raise DataError(state,err_text)
elif state[:2] in (raw_s('23')) or state == raw_s('40002'):
raise IntegrityError(state,err_text)
elif state == raw_s('0A000'):
raise NotSupportedError(state,err_text)
elif state in (raw_s('HYT00'),raw_s('HYT01')):
raise OperationalError(state,err_text)
elif state[:2] in (raw_s('IM'),raw_s('HY')):
raise Error(state,err_text)
else:
raise DatabaseError(state,err_text)
break
elif ret == SQL_INVALID_HANDLE:
#The handle passed is an invalid handle
raise ProgrammingError('', 'SQL_INVALID_HANDLE')
elif ret == SQL_SUCCESS:
if ansi:
err_list.append((state.value, Message.value, NativeError.value))
else:
err_list.append((from_buffer_u(state), from_buffer_u(Message), NativeError.value))
number_errors += 1
elif ret == SQL_ERROR:
raise ProgrammingError('', 'SQL_ERROR')
def check_success(ODBC_obj, ret):
""" Validate return value, if not success, raise exceptions based on the handle """
if ret not in (SQL_SUCCESS, SQL_SUCCESS_WITH_INFO, SQL_NO_DATA):
if isinstance(ODBC_obj, Cursor):
ctrl_err(SQL_HANDLE_STMT, ODBC_obj.stmt_h, ret, ODBC_obj.ansi)
elif isinstance(ODBC_obj, Connection):
ctrl_err(SQL_HANDLE_DBC, ODBC_obj.dbc_h, ret, ODBC_obj.ansi)
else:
ctrl_err(SQL_HANDLE_ENV, ODBC_obj, ret, False)
def AllocateEnv():
if pooling:
ret = ODBC_API.SQLSetEnvAttr(SQL_NULL_HANDLE, SQL_ATTR_CONNECTION_POOLING, SQL_CP_ONE_PER_HENV, SQL_IS_UINTEGER)
check_success(SQL_NULL_HANDLE, ret)
'''
Allocate an ODBC environment by initializing the handle shared_env_h
ODBC enviroment needed to be created, so connections can be created under it
connections pooling can be shared under one environment
'''
global shared_env_h
shared_env_h = ctypes.c_void_p()
ret = ODBC_API.SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, ADDR(shared_env_h))
check_success(shared_env_h, ret)
# Set the ODBC environment's compatibil leve to ODBC 3.0
ret = ODBC_API.SQLSetEnvAttr(shared_env_h, SQL_ATTR_ODBC_VERSION, SQL_OV_ODBC3, 0)
check_success(shared_env_h, ret)
"""
Here, we have a few callables that determine how a result row is returned.
A new one can be added by creating a callable that:
- accepts a cursor as its parameter.
- returns a callable that accepts an iterable containing the row values.
"""
def TupleRow(cursor):
"""Normal tuple with added attribute `cursor_description`, as in pyodbc.
This is the default.
"""
class Row(tuple):
cursor_description = cursor.description
def get(self, field):
if not hasattr(self, 'field_dict'):
self.field_dict = {}
for i,item in enumerate(self):
self.field_dict[self.cursor_description[i][0]] = item
return self.field_dict.get(field)
def __getitem__(self, field):
if isinstance(field, (unicode,str)):
return self.get(field)
else:
return tuple.__getitem__(self,field)
return Row
def NamedTupleRow(cursor):
"""Named tuple to allow attribute lookup by name.
Requires py2.6 or above.
"""
from collections import namedtuple
attr_names = [x[0] for x in cursor._ColBufferList]
class Row(namedtuple('Row', attr_names, rename=True)):
cursor_description = cursor.description
def __new__(cls, iterable):
return super(Row, cls).__new__(cls, *iterable)
return Row
def MutableNamedTupleRow(cursor):
"""Mutable named tuple to allow attribute to be replaced. This should be
compatible with pyodbc's Row type.
Requires 3rd-party library "recordtype".
"""
from recordtype import recordtype
attr_names = [x[0] for x in cursor._ColBufferList]
class Row(recordtype('Row', attr_names, rename=True)):
cursor_description = cursor.description
def __init__(self, iterable):
super(Row, self).__init__(*iterable)
def __iter__(self):
for field_name in self.__slots__:
yield getattr(self, field_name)
def __getitem__(self, index):
if isinstance(index, slice):
return tuple(getattr(self, x) for x in self.__slots__[index])
return getattr(self, self.__slots__[index])
def __setitem__(self, index, value):
setattr(self, self.__slots__[index], value)
return Row
# When Null is used in a binary parameter, database usually would not
# accept the None for a binary field, so the work around is to use a
# Specical None that the pypyodbc moudle would know this NULL is for
# a binary field.
class BinaryNullType(): pass
BinaryNull = BinaryNullType()
# The get_type function is used to determine if parameters need to be re-binded
# against the changed parameter types
# 'b' for bool, 'U' for long unicode string, 'u' for short unicode string
# 'S' for long 8 bit string, 's' for short 8 bit string, 'l' for big integer, 'i' for normal integer
# 'f' for float, 'D' for Decimal, 't' for datetime.time, 'd' for datetime.datetime, 'dt' for datetime.datetime
# 'bi' for binary
def get_type(v):
if isinstance(v, bool):
return ('b',)
elif isinstance(v, unicode):
if len(v) >= 255:
return ('U',(len(v)//1000+1)*1000)
else:
return ('u',)
elif isinstance(v, (str_8b,str)):
if len(v) >= 255:
return ('S',(len(v)//1000+1)*1000)
else:
return ('s',)
elif isinstance(v, (int, long)):
#SQL_BIGINT defination: http://msdn.microsoft.com/en-us/library/ms187745.aspx
if v > 2147483647 or v < -2147483648:
return ('l',)
else:
return ('i',)
elif isinstance(v, float):
return ('f',)
elif isinstance(v, BinaryNullType):
return ('BN',)
elif v is None:
return ('N',)
elif isinstance(v, Decimal):
t = v.as_tuple() #1.23 -> (1,2,3),-2 , 1.23*E7 -> (1,2,3),5
return ('D',(len(t[1]),0 - t[2])) # number of digits, and number of decimal digits
elif isinstance (v, datetime.datetime):
return ('dt',)
elif isinstance (v, datetime.date):
return ('d',)
elif isinstance(v, datetime.time):
return ('t',)
elif isinstance (v, (bytearray, buffer)):
return ('bi',(len(v)//1000+1)*1000)
return type(v)
# The Cursor Class.
class Cursor:
def __init__(self, conx, row_type_callable=None):
""" Initialize self.stmt_h, which is the handle of a statement
A statement is actually the basis of a python"cursor" object
"""
self.stmt_h = ctypes.c_void_p()
self.connection = conx
self.ansi = conx.ansi
self.row_type_callable = row_type_callable or TupleRow
self.statement = None
self._last_param_types = None
self._ParamBufferList = []
self._ColBufferList = []
self._row_type = None
self._buf_cvt_func = []
self.rowcount = -1
self.description = None
self.autocommit = None
self._ColTypeCodeList = []
self._outputsize = {}
self._inputsizers = []
self.arraysize = 1
ret = ODBC_API.SQLAllocHandle(SQL_HANDLE_STMT, self.connection.dbc_h, ADDR(self.stmt_h))
check_success(self, ret)
self.timeout = conx.timeout
if self.timeout != 0:
self.set_timeout(self.timeout)
self._PARAM_SQL_TYPE_LIST = []
self.closed = False
def set_timeout(self, timeout):
self.timeout = timeout
ret = ODBC_API.SQLSetStmtAttr(self.stmt_h, SQL_ATTR_QUERY_TIMEOUT, self.timeout, 0)
check_success(self, ret)
def prepare(self, query_string):
"""prepare a query"""
#self._free_results(FREE_STATEMENT)
if not self.connection:
self.close()
if type(query_string) == unicode:
c_query_string = wchar_pointer(UCS_buf(query_string))
ret = ODBC_API.SQLPrepareW(self.stmt_h, c_query_string, len(query_string))
else:
c_query_string = ctypes.c_char_p(query_string)
ret = ODBC_API.SQLPrepare(self.stmt_h, c_query_string, len(query_string))
if ret != SQL_SUCCESS:
check_success(self, ret)
self._PARAM_SQL_TYPE_LIST = []
if self.connection.support_SQLDescribeParam:
# SQLServer's SQLDescribeParam only supports DML SQL, so avoid the SELECT statement
if True:# 'SELECT' not in query_string.upper():
#self._free_results(NO_FREE_STATEMENT)
NumParams = c_short()
ret = ODBC_API.SQLNumParams(self.stmt_h, ADDR(NumParams))
if ret != SQL_SUCCESS:
check_success(self, ret)
for col_num in range(NumParams.value):
ParameterNumber = ctypes.c_ushort(col_num + 1)
DataType = c_short()
ParameterSize = ctypes.c_size_t()
DecimalDigits = c_short()
Nullable = c_short()
ret = ODBC_API.SQLDescribeParam(
self.stmt_h,
ParameterNumber,
ADDR(DataType),
ADDR(ParameterSize),
ADDR(DecimalDigits),
ADDR(Nullable),
)
if ret != SQL_SUCCESS:
try:
check_success(self, ret)
except DatabaseError:
if sys.exc_info()[1].value[0] == '07009':
self._PARAM_SQL_TYPE_LIST = []
break
else:
raise sys.exc_info()[1]
except:
raise sys.exc_info()[1]
self._PARAM_SQL_TYPE_LIST.append((DataType.value,DecimalDigits.value))
self.statement = query_string
def _BindParams(self, param_types, pram_io_list = []):
"""Create parameter buffers based on param types, and bind them to the statement"""
# Clear the old Parameters
if not self.connection:
self.close()
#self._free_results(NO_FREE_STATEMENT)
# Get the number of query parameters judged by database.
NumParams = c_short()
ret = ODBC_API.SQLNumParams(self.stmt_h, ADDR(NumParams))
if ret != SQL_SUCCESS:
check_success(self, ret)
if len(param_types) != NumParams.value:
# In case number of parameters provided do not same as number required
error_desc = "The SQL contains %d parameter markers, but %d parameters were supplied" \
%(NumParams.value,len(param_types))
raise ProgrammingError('HY000',error_desc)
# Every parameter needs to be binded to a buffer
ParamBufferList = []
# Temporary holder since we can only call SQLDescribeParam before
# calling SQLBindParam.
temp_holder = []
for col_num in range(NumParams.value):
dec_num = 0
buf_size = 512
if param_types[col_num][0] == 'u':
sql_c_type = SQL_C_WCHAR
sql_type = SQL_WVARCHAR
buf_size = 255
ParameterBuffer = create_buffer_u(buf_size)
elif param_types[col_num][0] == 's':
sql_c_type = SQL_C_CHAR
sql_type = SQL_VARCHAR
buf_size = 255
ParameterBuffer = create_buffer(buf_size)
elif param_types[col_num][0] == 'U':
sql_c_type = SQL_C_WCHAR
sql_type = SQL_WLONGVARCHAR
buf_size = param_types[col_num][1]#len(self._inputsizers)>col_num and self._inputsizers[col_num] or 20500
ParameterBuffer = create_buffer_u(buf_size)
elif param_types[col_num][0] == 'S':
sql_c_type = SQL_C_CHAR
sql_type = SQL_LONGVARCHAR
buf_size = param_types[col_num][1]#len(self._inputsizers)>col_num and self._inputsizers[col_num] or 20500
ParameterBuffer = create_buffer(buf_size)
# bool subclasses int, thus has to go first
elif param_types[col_num][0] == 'b':
sql_c_type = SQL_C_CHAR
sql_type = SQL_BIT
buf_size = SQL_data_type_dict[sql_type][4]
ParameterBuffer = create_buffer(buf_size)
elif param_types[col_num][0] == 'i':
sql_c_type = SQL_C_CHAR
sql_type = SQL_INTEGER
buf_size = SQL_data_type_dict[sql_type][4]
ParameterBuffer = create_buffer(buf_size)
elif param_types[col_num][0] == 'l':
sql_c_type = SQL_C_CHAR
sql_type = SQL_BIGINT
buf_size = SQL_data_type_dict[sql_type][4]
ParameterBuffer = create_buffer(buf_size)
elif param_types[col_num][0] == 'D': #Decimal
sql_c_type = SQL_C_CHAR
sql_type = SQL_NUMERIC
digit_num, dec_num = param_types[col_num][1]
if dec_num > 0:
# has decimal
buf_size = digit_num
dec_num = dec_num
else:
# no decimal
buf_size = digit_num - dec_num
dec_num = 0
ParameterBuffer = create_buffer(buf_size + 4)# add extra length for sign and dot
elif param_types[col_num][0] == 'f':
sql_c_type = SQL_C_CHAR
sql_type = SQL_DOUBLE
buf_size = SQL_data_type_dict[sql_type][4]
ParameterBuffer = create_buffer(buf_size)
# datetime subclasses date, thus has to go first
elif param_types[col_num][0] == 'dt':
sql_c_type = SQL_C_CHAR
sql_type = SQL_TYPE_TIMESTAMP
buf_size = self.connection.type_size_dic[SQL_TYPE_TIMESTAMP][0]
ParameterBuffer = create_buffer(buf_size)
dec_num = self.connection.type_size_dic[SQL_TYPE_TIMESTAMP][1]
elif param_types[col_num][0] == 'd':
sql_c_type = SQL_C_CHAR
if SQL_TYPE_DATE in self.connection.type_size_dic:
#if DEBUG:print('conx.type_size_dic.has_key(SQL_TYPE_DATE)')
sql_type = SQL_TYPE_DATE
buf_size = self.connection.type_size_dic[SQL_TYPE_DATE][0]
ParameterBuffer = create_buffer(buf_size)
dec_num = self.connection.type_size_dic[SQL_TYPE_DATE][1]
else:
# SQL Sever <2008 doesn't have a DATE type.
sql_type = SQL_TYPE_TIMESTAMP
buf_size = 10
ParameterBuffer = create_buffer(buf_size)
elif param_types[col_num][0] == 't':
sql_c_type = SQL_C_CHAR
if SQL_TYPE_TIME in self.connection.type_size_dic:
sql_type = SQL_TYPE_TIME
buf_size = self.connection.type_size_dic[SQL_TYPE_TIME][0]
ParameterBuffer = create_buffer(buf_size)
dec_num = self.connection.type_size_dic[SQL_TYPE_TIME][1]
elif SQL_SS_TIME2 in self.connection.type_size_dic:
# TIME type added in SQL Server 2008
sql_type = SQL_SS_TIME2
buf_size = self.connection.type_size_dic[SQL_SS_TIME2][0]
ParameterBuffer = create_buffer(buf_size)
dec_num = self.connection.type_size_dic[SQL_SS_TIME2][1]
else:
# SQL Sever <2008 doesn't have a TIME type.
sql_type = SQL_TYPE_TIMESTAMP
buf_size = self.connection.type_size_dic[SQL_TYPE_TIMESTAMP][0]
ParameterBuffer = create_buffer(buf_size)
dec_num = 3
elif param_types[col_num][0] == 'BN':
sql_c_type = SQL_C_BINARY
sql_type = SQL_VARBINARY
buf_size = 1
ParameterBuffer = create_buffer(buf_size)
elif param_types[col_num][0] == 'N':
if len(self._PARAM_SQL_TYPE_LIST) > 0:
sql_c_type = SQL_C_DEFAULT
sql_type = self._PARAM_SQL_TYPE_LIST[col_num][0]
buf_size = 1
ParameterBuffer = create_buffer(buf_size)
else:
sql_c_type = SQL_C_CHAR
sql_type = SQL_CHAR
buf_size = 1
ParameterBuffer = create_buffer(buf_size)
elif param_types[col_num][0] == 'bi':
sql_c_type = SQL_C_BINARY
sql_type = SQL_LONGVARBINARY
buf_size = param_types[col_num][1]#len(self._inputsizers)>col_num and self._inputsizers[col_num] or 20500
ParameterBuffer = create_buffer(buf_size)
else:
sql_c_type = SQL_C_CHAR
sql_type = SQL_LONGVARCHAR
buf_size = len(self._inputsizers)>col_num and self._inputsizers[col_num] or 20500
ParameterBuffer = create_buffer(buf_size)
temp_holder.append((sql_c_type, sql_type, buf_size, dec_num, ParameterBuffer))
for col_num, (sql_c_type, sql_type, buf_size, dec_num, ParameterBuffer) in enumerate(temp_holder):
BufferLen = c_ssize_t(buf_size)
LenOrIndBuf = c_ssize_t()
InputOutputType = SQL_PARAM_INPUT
if len(pram_io_list) > col_num:
InputOutputType = pram_io_list[col_num]
ret = SQLBindParameter(self.stmt_h, col_num + 1, InputOutputType, sql_c_type, sql_type, buf_size,\
dec_num, ADDR(ParameterBuffer), BufferLen,ADDR(LenOrIndBuf))
if ret != SQL_SUCCESS:
check_success(self, ret)
# Append the value buffer and the length buffer to the array
ParamBufferList.append((ParameterBuffer,LenOrIndBuf,sql_type))
self._last_param_types = param_types
self._ParamBufferList = ParamBufferList
def execute(self, query_string, params=None, many_mode=False, call_mode=False):
""" Execute the query string, with optional parameters.
If parameters are provided, the query would first be prepared, then executed with parameters;
If parameters are not provided, only th query sting, it would be executed directly
"""
if not self.connection:
self.close()
self._free_stmt(SQL_CLOSE)
if params:
# If parameters exist, first prepare the query then executed with parameters
if not isinstance(params, (tuple, list)):
raise TypeError("Params must be in a list, tuple, or Row")
if query_string != self.statement:
# if the query is not same as last query, then it is not prepared
self.prepare(query_string)
param_types = list(map(get_type, params))
if call_mode:
self._free_stmt(SQL_RESET_PARAMS)
self._BindParams(param_types, self._pram_io_list)
else:
if self._last_param_types is None:
self._free_stmt(SQL_RESET_PARAMS)
self._BindParams(param_types)
elif len(param_types) != len(self._last_param_types):
self._free_stmt(SQL_RESET_PARAMS)
self._BindParams(param_types)
elif sum([p_type[0] != 'N' and p_type != self._last_param_types[i] for i,p_type in enumerate(param_types)]) > 0:
self._free_stmt(SQL_RESET_PARAMS)
self._BindParams(param_types)
# With query prepared, now put parameters into buffers
col_num = 0
for param_buffer, param_buffer_len, sql_type in self._ParamBufferList:
c_char_buf, c_buf_len = '', 0
param_val = params[col_num]
if param_types[col_num][0] in ('N','BN'):
param_buffer_len.value = SQL_NULL_DATA
col_num += 1
continue
elif param_types[col_num][0] in ('i','l','f'):
if py_v3:
c_char_buf = bytes(str(param_val),'ascii')
else:
c_char_buf = str(param_val)
c_buf_len = len(c_char_buf)
elif param_types[col_num][0] in ('s','S'):
c_char_buf = param_val
c_buf_len = len(c_char_buf)
elif param_types[col_num][0] in ('u','U'):
c_char_buf = UCS_buf(param_val)
c_buf_len = len(c_char_buf)
elif param_types[col_num][0] == 'dt':
max_len = self.connection.type_size_dic[SQL_TYPE_TIMESTAMP][0]
datetime_str = param_val.strftime('%Y-%m-%d %H:%M:%S.%f')
c_char_buf = datetime_str[:max_len]
if py_v3:
c_char_buf = bytes(c_char_buf,'ascii')
c_buf_len = len(c_char_buf)
# print c_buf_len, c_char_buf
elif param_types[col_num][0] == 'd':
if SQL_TYPE_DATE in self.connection.type_size_dic:
max_len = self.connection.type_size_dic[SQL_TYPE_DATE][0]
else:
max_len = 10
c_char_buf = param_val.isoformat()[:max_len]
if py_v3:
c_char_buf = bytes(c_char_buf,'ascii')
c_buf_len = len(c_char_buf)
#print c_char_buf
elif param_types[col_num][0] == 't':
if SQL_TYPE_TIME in self.connection.type_size_dic:
max_len = self.connection.type_size_dic[SQL_TYPE_TIME][0]
c_char_buf = param_val.isoformat()[:max_len]
c_buf_len = len(c_char_buf)
elif SQL_SS_TIME2 in self.connection.type_size_dic:
max_len = self.connection.type_size_dic[SQL_SS_TIME2][0]
c_char_buf = param_val.isoformat()[:max_len]
c_buf_len = len(c_char_buf)
else:
c_buf_len = self.connection.type_size_dic[SQL_TYPE_TIMESTAMP][0]
time_str = param_val.isoformat()
if len(time_str) == 8:
time_str += '.000'
c_char_buf = '1900-01-01 '+time_str[0:c_buf_len - 11]
if py_v3:
c_char_buf = bytes(c_char_buf,'ascii')
#print c_buf_len, c_char_buf
elif param_types[col_num][0] == 'b':
if param_val == True:
c_char_buf = '1'
else:
c_char_buf = '0'
if py_v3:
c_char_buf = bytes(c_char_buf,'ascii')
c_buf_len = 1
elif param_types[col_num][0] == 'D': #Decimal
sign = param_val.as_tuple()[0] == 0 and '+' or '-'
digit_string = ''.join([str(x) for x in param_val.as_tuple()[1]])
digit_num, dec_num = param_types[col_num][1]
if dec_num > 0:
# has decimal
left_part = digit_string[:digit_num - dec_num]
right_part = digit_string[0-dec_num:]
else:
# no decimal
left_part = digit_string + '0'*(0-dec_num)
right_part = ''
v = ''.join((sign, left_part,'.', right_part))
if py_v3:
c_char_buf = bytes(v,'ascii')
else:
c_char_buf = v
c_buf_len = len(c_char_buf)
elif param_types[col_num][0] == 'bi':
c_char_buf = str_8b(param_val)
c_buf_len = len(c_char_buf)
else:
c_char_buf = param_val
if param_types[col_num][0] == 'bi':
param_buffer.raw = str_8b(param_val)
else:
#print (type(param_val),param_buffer, param_buffer.value)
param_buffer.value = c_char_buf
if param_types[col_num][0] in ('U','u','S','s'):
#ODBC driver will find NUL in unicode and string to determine their length
param_buffer_len.value = SQL_NTS
else:
param_buffer_len.value = c_buf_len
col_num += 1
ret = SQLExecute(self.stmt_h)
if ret != SQL_SUCCESS:
#print param_valparam_buffer, param_buffer.value
check_success(self, ret)
if not many_mode:
self._NumOfRows()
self._UpdateDesc()
#self._BindCols()
else:
self.execdirect(query_string)
return self
def _SQLExecute(self):
if not self.connection:
self.close()
ret = SQLExecute(self.stmt_h)
if ret != SQL_SUCCESS:
check_success(self, ret)
def execdirect(self, query_string):
"""Execute a query directly"""
if not self.connection:
self.close()
self._free_stmt()
self._last_param_types = None
self.statement = None
if type(query_string) == unicode:
c_query_string = wchar_pointer(UCS_buf(query_string))
ret = ODBC_API.SQLExecDirectW(self.stmt_h, c_query_string, len(query_string))
else:
c_query_string = ctypes.c_char_p(query_string)
ret = ODBC_API.SQLExecDirect(self.stmt_h, c_query_string, len(query_string))
check_success(self, ret)
self._NumOfRows()
self._UpdateDesc()
#self._BindCols()
return self
def callproc(self, procname, args):
if not self.connection:
self.close()
raise Warning('', 'Still not fully implemented')
self._pram_io_list = [row[4] for row in self.procedurecolumns(procedure = procname).fetchall() if row[4] not in (SQL_RESULT_COL, SQL_RETURN_VALUE)]
print('pram_io_list: '+str(self._pram_io_list))
call_escape = '{CALL '+procname
if args:
call_escape += '(' + ','.join(['?' for params in args]) + ')'
call_escape += '}'
self.execute(call_escape, args, call_mode = True)
result = []
for buf, buf_len, sql_type in self._ParamBufferList:
if buf_len.value == -1:
result.append(None)
else:
result.append(self.connection.output_converter[sql_type](buf.value))
return result
def executemany(self, query_string, params_list = [None]):
if not self.connection:
self.close()
for params in params_list:
self.execute(query_string, params, many_mode = True)
self._NumOfRows()
self.rowcount = -1
self._UpdateDesc()
#self._BindCols()
def _CreateColBuf(self):
if not self.connection:
self.close()
self._free_stmt(SQL_UNBIND)
NOC = self._NumOfCols()
self._ColBufferList = []
bind_data = True
for col_num in range(NOC):
col_name = self.description[col_num][0]
col_size = self.description[col_num][2]
col_sql_data_type = self._ColTypeCodeList[col_num]
target_type = SQL_data_type_dict[col_sql_data_type][2]
dynamic_length = SQL_data_type_dict[col_sql_data_type][5]
# set default size base on the column's sql data type
total_buf_len = SQL_data_type_dict[col_sql_data_type][4]
# over-write if there's pre-set size value for "large columns"
if total_buf_len > 20500:
total_buf_len = self._outputsize.get(None,total_buf_len)
# over-write if there's pre-set size value for the "col_num" column
total_buf_len = self._outputsize.get(col_num, total_buf_len)
# if the size of the buffer is very long, do not bind
# because a large buffer decrease performance, and sometimes you only get a NULL value.
# in that case use sqlgetdata instead.
if col_size >= 1024:
dynamic_length = True
alloc_buffer = SQL_data_type_dict[col_sql_data_type][3](total_buf_len)
used_buf_len = c_ssize_t()
force_unicode = self.connection.unicode_results
if force_unicode and col_sql_data_type in (SQL_CHAR,SQL_VARCHAR,SQL_LONGVARCHAR):
target_type = SQL_C_WCHAR
alloc_buffer = create_buffer_u(total_buf_len)
buf_cvt_func = self.connection.output_converter[self._ColTypeCodeList[col_num]]
if bind_data:
if dynamic_length:
bind_data = False
self._ColBufferList.append([col_name, target_type, used_buf_len, ADDR(used_buf_len), alloc_buffer, ADDR(alloc_buffer), total_buf_len, buf_cvt_func, bind_data])
if bind_data:
ret = ODBC_API.SQLBindCol(self.stmt_h, col_num + 1, target_type, ADDR(alloc_buffer), total_buf_len, ADDR(used_buf_len))
if ret != SQL_SUCCESS:
check_success(self, ret)
def _UpdateDesc(self):
"Get the information of (name, type_code, display_size, internal_size, col_precision, scale, null_ok)"
if not self.connection:
self.close()
force_unicode = self.connection.unicode_results
if force_unicode:
Cname = create_buffer_u(1024)
else:
Cname = create_buffer(1024)
Cname_ptr = c_short()
Ctype_code = c_short()
Csize = ctypes.c_size_t()
Cdisp_size = c_ssize_t(0)
CDecimalDigits = c_short()
Cnull_ok = c_short()
ColDescr = []
self._ColTypeCodeList = []
NOC = self._NumOfCols()
for col in range(1, NOC+1):
ret = ODBC_API.SQLColAttribute(self.stmt_h, col, SQL_DESC_DISPLAY_SIZE, ADDR(create_buffer(10)),
10, ADDR(c_short()),ADDR(Cdisp_size))
if ret != SQL_SUCCESS:
check_success(self, ret)
if force_unicode:
ret = ODBC_API.SQLDescribeColW(self.stmt_h, col, Cname, len(Cname), ADDR(Cname_ptr),\
ADDR(Ctype_code),ADDR(Csize),ADDR(CDecimalDigits), ADDR(Cnull_ok))
if ret != SQL_SUCCESS:
check_success(self, ret)
else:
ret = ODBC_API.SQLDescribeCol(self.stmt_h, col, Cname, len(Cname), ADDR(Cname_ptr),\
ADDR(Ctype_code),ADDR(Csize),ADDR(CDecimalDigits), ADDR(Cnull_ok))
if ret != SQL_SUCCESS:
check_success(self, ret)
col_name = Cname.value
if lowercase:
col_name = col_name.lower()
#(name, type_code, display_size,
ColDescr.append((col_name, SQL_data_type_dict.get(Ctype_code.value,(Ctype_code.value,))[0],Cdisp_size.value,\
Csize.value, Csize.value,CDecimalDigits.value,Cnull_ok.value == 1 and True or False))
self._ColTypeCodeList.append(Ctype_code.value)
if len(ColDescr) > 0:
self.description = ColDescr
# Create the row type before fetching.
self._row_type = self.row_type_callable(self)
else:
self.description = None
self._CreateColBuf()
def _NumOfRows(self):
"""Get the number of rows"""
if not self.connection:
self.close()
NOR = c_ssize_t()
ret = SQLRowCount(self.stmt_h, ADDR(NOR))
if ret != SQL_SUCCESS:
check_success(self, ret)
self.rowcount = NOR.value
return self.rowcount
def _NumOfCols(self):
"""Get the number of cols"""
if not self.connection:
self.close()
NOC = c_short()
ret = SQLNumResultCols(self.stmt_h, ADDR(NOC))
if ret != SQL_SUCCESS:
check_success(self, ret)
return NOC.value
def fetchall(self):
if not self.connection:
self.close()
rows = []
while True:
row = self.fetchone()
if row is None:
break
rows.append(row)
return rows
def fetchmany(self, num = None):
if not self.connection:
self.close()
if num is None:
num = self.arraysize
rows = []
while len(rows) < num:
row = self.fetchone()
if row is None:
break
rows.append(row)
return rows
def fetchone(self):
if not self.connection:
self.close()
ret = SQLFetch(self.stmt_h)
if ret in (SQL_SUCCESS,SQL_SUCCESS_WITH_INFO):
'''Bind buffers for the record set columns'''
value_list = []
col_num = 1
for col_name, target_type, used_buf_len, ADDR_used_buf_len, alloc_buffer, ADDR_alloc_buffer, total_buf_len, buf_cvt_func, bind_data in self._ColBufferList:
raw_data_parts = []
while 1:
if bind_data:
ret = SQL_SUCCESS
else:
ret = SQLGetData(self.stmt_h, col_num, target_type, ADDR_alloc_buffer, total_buf_len, ADDR_used_buf_len)
if ret == SQL_SUCCESS:
if used_buf_len.value == SQL_NULL_DATA:
value_list.append(None)
else:
if raw_data_parts == []:
# Means no previous data, no need to combine
if target_type == SQL_C_BINARY:
value_list.append(buf_cvt_func(alloc_buffer.raw[:used_buf_len.value]))
elif target_type == SQL_C_WCHAR:
value_list.append(buf_cvt_func(from_buffer_u(alloc_buffer)))
else:
value_list.append(buf_cvt_func(alloc_buffer.value))
else:
# There are previous fetched raw data to combine
if target_type == SQL_C_BINARY:
raw_data_parts.append(alloc_buffer.raw[:used_buf_len.value])
elif target_type == SQL_C_WCHAR:
raw_data_parts.append(from_buffer_u(alloc_buffer))
else:
raw_data_parts.append(alloc_buffer.value)
break
elif ret == SQL_SUCCESS_WITH_INFO:
# Means the data is only partial
if target_type == SQL_C_BINARY:
raw_data_parts.append(alloc_buffer.raw)
else:
raw_data_parts.append(alloc_buffer.value)
elif ret == SQL_NO_DATA:
# Means all data has been transmitted
break
else:
check_success(self, ret)
if raw_data_parts != []:
if py_v3:
if target_type != SQL_C_BINARY:
raw_value = ''.join(raw_data_parts)
else:
raw_value = BLANK_BYTE.join(raw_data_parts)
else:
raw_value = ''.join(raw_data_parts)
value_list.append(buf_cvt_func(raw_value))
col_num += 1
return self._row_type(value_list)
else:
if ret == SQL_NO_DATA_FOUND:
return None
else:
check_success(self, ret)
def __next__(self):
return self.next()
def next(self):
row = self.fetchone()
if row is None:
raise(StopIteration)
return row
def __iter__(self):
return self
def skip(self, count = 0):
if not self.connection:
self.close()
for i in range(count):
ret = ODBC_API.SQLFetchScroll(self.stmt_h, SQL_FETCH_NEXT, 0)
if ret != SQL_SUCCESS:
check_success(self, ret)
return None
def nextset(self):
if not self.connection:
self.close()
ret = ODBC_API.SQLMoreResults(self.stmt_h)
if ret not in (SQL_SUCCESS, SQL_NO_DATA):
check_success(self, ret)
if ret == SQL_NO_DATA:
self._free_stmt()
return False
else:
self._NumOfRows()
self._UpdateDesc()
#self._BindCols()
return True
def _free_stmt(self, free_type = None):
if not self.connection:
self.close()
if not self.connection.connected:
raise ProgrammingError('HY000','Attempt to use a closed connection.')
#self.description = None
#self.rowcount = -1
if free_type in (SQL_CLOSE, None):
ret = ODBC_API.SQLFreeStmt(self.stmt_h, SQL_CLOSE)
if ret != SQL_SUCCESS:
check_success(self, ret)
if free_type in (SQL_UNBIND, None):
ret = ODBC_API.SQLFreeStmt(self.stmt_h, SQL_UNBIND)
if ret != SQL_SUCCESS:
check_success(self, ret)
if free_type in (SQL_RESET_PARAMS, None):
ret = ODBC_API.SQLFreeStmt(self.stmt_h, SQL_RESET_PARAMS)
if ret != SQL_SUCCESS:
check_success(self, ret)
def getTypeInfo(self, sqlType = None):
if not self.connection:
self.close()
if sqlType is None:
type = SQL_ALL_TYPES
else:
type = sqlType
ret = ODBC_API.SQLGetTypeInfo(self.stmt_h, type)
if ret in (SQL_SUCCESS, SQL_SUCCESS_WITH_INFO):
self._NumOfRows()
self._UpdateDesc()
#self._BindCols()
return self.fetchone()
def tables(self, table=None, catalog=None, schema=None, tableType=None):
"""Return a list with all tables"""
if not self.connection:
self.close()
l_catalog = l_schema = l_table = l_tableType = 0
if unicode in [type(x) for x in (table, catalog, schema,tableType)]:
string_p = lambda x:wchar_pointer(UCS_buf(x))
API_f = ODBC_API.SQLTablesW
else:
string_p = ctypes.c_char_p
API_f = ODBC_API.SQLTables
if catalog is not None:
l_catalog = len(catalog)
catalog = string_p(catalog)
if schema is not None:
l_schema = len(schema)
schema = string_p(schema)
if table is not None:
l_table = len(table)
table = string_p(table)
if tableType is not None:
l_tableType = len(tableType)
tableType = string_p(tableType)
self._free_stmt()
self._last_param_types = None
self.statement = None
ret = API_f(self.stmt_h,
catalog, l_catalog,
schema, l_schema,
table, l_table,
tableType, l_tableType)
check_success(self, ret)
self._NumOfRows()
self._UpdateDesc()
#self._BindCols()
return self
def columns(self, table=None, catalog=None, schema=None, column=None):
"""Return a list with all columns"""
if not self.connection:
self.close()
l_catalog = l_schema = l_table = l_column = 0
if unicode in [type(x) for x in (table, catalog, schema,column)]:
string_p = lambda x:wchar_pointer(UCS_buf(x))
API_f = ODBC_API.SQLColumnsW
else:
string_p = ctypes.c_char_p
API_f = ODBC_API.SQLColumns
if catalog is not None:
l_catalog = len(catalog)
catalog = string_p(catalog)
if schema is not None:
l_schema = len(schema)
schema = string_p(schema)
if table is not None:
l_table = len(table)
table = string_p(table)
if column is not None:
l_column = len(column)
column = string_p(column)
self._free_stmt()
self._last_param_types = None
self.statement = None
ret = API_f(self.stmt_h,
catalog, l_catalog,
schema, l_schema,
table, l_table,
column, l_column)
check_success(self, ret)
self._NumOfRows()
self._UpdateDesc()
#self._BindCols()
return self
def primaryKeys(self, table=None, catalog=None, schema=None):
if not self.connection:
self.close()
l_catalog = l_schema = l_table = 0
if unicode in [type(x) for x in (table, catalog, schema)]:
string_p = lambda x:wchar_pointer(UCS_buf(x))
API_f = ODBC_API.SQLPrimaryKeysW
else:
string_p = ctypes.c_char_p
API_f = ODBC_API.SQLPrimaryKeys
if catalog is not None:
l_catalog = len(catalog)
catalog = string_p(catalog)
if schema is not None:
l_schema = len(schema)
schema = string_p(schema)
if table is not None:
l_table = len(table)
table = string_p(table)
self._free_stmt()
self._last_param_types = None
self.statement = None
ret = API_f(self.stmt_h,
catalog, l_catalog,
schema, l_schema,
table, l_table)
check_success(self, ret)
self._NumOfRows()
self._UpdateDesc()
#self._BindCols()
return self
def foreignKeys(self, table=None, catalog=None, schema=None, foreignTable=None, foreignCatalog=None, foreignSchema=None):
if not self.connection:
self.close()
l_catalog = l_schema = l_table = l_foreignTable = l_foreignCatalog = l_foreignSchema = 0
if unicode in [type(x) for x in (table, catalog, schema,foreignTable,foreignCatalog,foreignSchema)]:
string_p = lambda x:wchar_pointer(UCS_buf(x))
API_f = ODBC_API.SQLForeignKeysW
else:
string_p = ctypes.c_char_p
API_f = ODBC_API.SQLForeignKeys
if catalog is not None:
l_catalog = len(catalog)
catalog = string_p(catalog)
if schema is not None:
l_schema = len(schema)
schema = string_p(schema)
if table is not None:
l_table = len(table)
table = string_p(table)
if foreignTable is not None:
l_foreignTable = len(foreignTable)
foreignTable = string_p(foreignTable)
if foreignCatalog is not None:
l_foreignCatalog = len(foreignCatalog)
foreignCatalog = string_p(foreignCatalog)
if foreignSchema is not None:
l_foreignSchema = len(foreignSchema)
foreignSchema = string_p(foreignSchema)
self._free_stmt()
self._last_param_types = None
self.statement = None
ret = API_f(self.stmt_h,
catalog, l_catalog,
schema, l_schema,
table, l_table,
foreignCatalog, l_foreignCatalog,
foreignSchema, l_foreignSchema,
foreignTable, l_foreignTable)
check_success(self, ret)
self._NumOfRows()
self._UpdateDesc()
#self._BindCols()
return self
def procedurecolumns(self, procedure=None, catalog=None, schema=None, column=None):
if not self.connection:
self.close()
l_catalog = l_schema = l_procedure = l_column = 0
if unicode in [type(x) for x in (procedure, catalog, schema,column)]:
string_p = lambda x:wchar_pointer(UCS_buf(x))
API_f = ODBC_API.SQLProcedureColumnsW
else:
string_p = ctypes.c_char_p
API_f = ODBC_API.SQLProcedureColumns
if catalog is not None:
l_catalog = len(catalog)
catalog = string_p(catalog)
if schema is not None:
l_schema = len(schema)
schema = string_p(schema)
if procedure is not None:
l_procedure = len(procedure)
procedure = string_p(procedure)
if column is not None:
l_column = len(column)
column = string_p(column)
self._free_stmt()
self._last_param_types = None
self.statement = None
ret = API_f(self.stmt_h,
catalog, l_catalog,
schema, l_schema,
procedure, l_procedure,
column, l_column)
check_success(self, ret)
self._NumOfRows()
self._UpdateDesc()
return self
def procedures(self, procedure=None, catalog=None, schema=None):
if not self.connection:
self.close()
l_catalog = l_schema = l_procedure = 0
if unicode in [type(x) for x in (procedure, catalog, schema)]:
string_p = lambda x:wchar_pointer(UCS_buf(x))
API_f = ODBC_API.SQLProceduresW
else:
string_p = ctypes.c_char_p
API_f = ODBC_API.SQLProcedures
if catalog is not None:
l_catalog = len(catalog)
catalog = string_p(catalog)
if schema is not None:
l_schema = len(schema)
schema = string_p(schema)
if procedure is not None:
l_procedure = len(procedure)
procedure = string_p(procedure)
self._free_stmt()
self._last_param_types = None
self.statement = None
ret = API_f(self.stmt_h,
catalog, l_catalog,
schema, l_schema,
procedure, l_procedure)
check_success(self, ret)
self._NumOfRows()
self._UpdateDesc()
return self
def statistics(self, table, catalog=None, schema=None, unique=False, quick=True):
if not self.connection:
self.close()
l_table = l_catalog = l_schema = 0
if unicode in [type(x) for x in (table, catalog, schema)]:
string_p = lambda x:wchar_pointer(UCS_buf(x))
API_f = ODBC_API.SQLStatisticsW
else:
string_p = ctypes.c_char_p
API_f = ODBC_API.SQLStatistics
if catalog is not None:
l_catalog = len(catalog)
catalog = string_p(catalog)
if schema is not None:
l_schema = len(schema)
schema = string_p(schema)
if table is not None:
l_table = len(table)
table = string_p(table)
if unique:
Unique = SQL_INDEX_UNIQUE
else:
Unique = SQL_INDEX_ALL
if quick:
Reserved = SQL_QUICK
else:
Reserved = SQL_ENSURE
self._free_stmt()
self._last_param_types = None
self.statement = None
ret = API_f(self.stmt_h,
catalog, l_catalog,
schema, l_schema,
table, l_table,
Unique, Reserved)
check_success(self, ret)
self._NumOfRows()
self._UpdateDesc()
#self._BindCols()
return self
def commit(self):
if not self.connection:
self.close()
self.connection.commit()
def rollback(self):
if not self.connection:
self.close()
self.connection.rollback()
def setoutputsize(self, size, column = None):
if not self.connection:
self.close()
self._outputsize[column] = size
def setinputsizes(self, sizes):
if not self.connection:
self.close()
self._inputsizers = [size for size in sizes]
def close(self):
""" Call SQLCloseCursor API to free the statement handle"""
# ret = ODBC_API.SQLCloseCursor(self.stmt_h)
# check_success(self, ret)
#
if self.connection.connected:
ret = ODBC_API.SQLFreeStmt(self.stmt_h, SQL_CLOSE)
check_success(self, ret)
ret = ODBC_API.SQLFreeStmt(self.stmt_h, SQL_UNBIND)
check_success(self, ret)
ret = ODBC_API.SQLFreeStmt(self.stmt_h, SQL_RESET_PARAMS)
check_success(self, ret)
ret = ODBC_API.SQLFreeHandle(SQL_HANDLE_STMT, self.stmt_h)
check_success(self, ret)
self.closed = True
def __del__(self):
if not self.closed:
self.close()
def __exit__(self, type, value, traceback):
if not self.connection:
self.close()
if value:
self.rollback()
else:
self.commit()
self.close()
def __enter__(self):
return self
# This class implement a odbc connection.
#
#
connection_timeout = 0
class Connection:
def __init__(self, connectString = '', autocommit = False, ansi = False, timeout = 0, unicode_results = use_unicode, readonly = False, **kargs):
"""Init variables and connect to the engine"""
self.connected = 0
self.type_size_dic = {}
self.ansi = False
self.unicode_results = False
self.dbc_h = ctypes.c_void_p()
self.autocommit = autocommit
self.readonly = False
# the query timeout value
self.timeout = 0
# self._cursors = []
for key, value in list(kargs.items()):
connectString = connectString + key + '=' + value + ';'
self.connectString = connectString
self.clear_output_converters()
try:
lock.acquire()
if shared_env_h is None:
#Initialize an enviroment if it is not created.
AllocateEnv()
finally:
lock.release()
# Allocate an DBC handle self.dbc_h under the environment shared_env_h
# This DBC handle is actually the basis of a "connection"
# The handle of self.dbc_h will be used to connect to a certain source
# in the self.connect and self.ConnectByDSN method
ret = ODBC_API.SQLAllocHandle(SQL_HANDLE_DBC, shared_env_h, ADDR(self.dbc_h))
check_success(self, ret)
self.connection_timeout = connection_timeout
if self.connection_timeout != 0:
self.set_connection_timeout(connection_timeout)
self.connect(connectString, autocommit, ansi, timeout, unicode_results, readonly)
def set_connection_timeout(self,connection_timeout):
self.connection_timeout = connection_timeout
ret = ODBC_API.SQLSetConnectAttr(self.dbc_h, SQL_ATTR_CONNECTION_TIMEOUT, connection_timeout, SQL_IS_UINTEGER);
check_success(self, ret)
def connect(self, connectString = '', autocommit = False, ansi = False, timeout = 0, unicode_results = use_unicode, readonly = False):
"""Connect to odbc, using connect strings and set the connection's attributes like autocommit and timeout
by calling SQLSetConnectAttr
"""
# Before we establish the connection by the connection string
# Set the connection's attribute of "timeout" (Actully LOGIN_TIMEOUT)
if timeout != 0:
ret = ODBC_API.SQLSetConnectAttr(self.dbc_h, SQL_ATTR_LOGIN_TIMEOUT, timeout, SQL_IS_UINTEGER);
check_success(self, ret)
# Create one connection with a connect string by calling SQLDriverConnect
# and make self.dbc_h the handle of this connection
# Convert the connetsytring to encoded string
# so it can be converted to a ctypes c_char array object
self.ansi = ansi
if not ansi:
c_connectString = wchar_pointer(UCS_buf(self.connectString))
odbc_func = ODBC_API.SQLDriverConnectW
else:
c_connectString = ctypes.c_char_p(self.connectString)
odbc_func = ODBC_API.SQLDriverConnect
# With unixODBC, SQLDriverConnect will intermittently fail with error:
# [01000] [unixODBC][Driver Manager]Can't open lib '/path/to/so' : file not found"
# or:
# [01000] [unixODBC][Driver Manager]Can't open lib '/path/to/so' : (null)"
# when called concurrently by more than one threads. So, we have to
# use a lock to serialize the calls. By the way, the error is much
# less likely to happen if ODBC Tracing is enabled, likely due to the
# implicit serialization caused by writing to trace file.
if ODBC_API._name != 'odbc32':
try:
lock.acquire()
ret = odbc_func(self.dbc_h, 0, c_connectString, len(self.connectString), None, 0, None, SQL_DRIVER_NOPROMPT)
finally:
lock.release()
else:
ret = odbc_func(self.dbc_h, 0, c_connectString, len(self.connectString), None, 0, None, SQL_DRIVER_NOPROMPT)
check_success(self, ret)
# Set the connection's attribute of "autocommit"
#
self.autocommit = autocommit
if self.autocommit == True:
ret = ODBC_API.SQLSetConnectAttr(self.dbc_h, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_ON, SQL_IS_UINTEGER)
else:
ret = ODBC_API.SQLSetConnectAttr(self.dbc_h, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_OFF, SQL_IS_UINTEGER)
check_success(self, ret)
# Set the connection's attribute of "readonly"
#
self.readonly = readonly
if self.readonly == True:
ret = ODBC_API.SQLSetConnectAttr(self.dbc_h, SQL_ATTR_ACCESS_MODE, SQL_MODE_READ_ONLY, SQL_IS_UINTEGER)
check_success(self, ret)
self.unicode_results = unicode_results
self.connected = 1
self.update_db_special_info()
def clear_output_converters(self):
self.output_converter = {}
for sqltype, profile in SQL_data_type_dict.items():
self.output_converter[sqltype] = profile[1]
def add_output_converter(self, sqltype, func):
self.output_converter[sqltype] = func
def ConnectByDSN(self, dsn, user, passwd = ''):
"""Connect to odbc, we need dsn, user and optionally password"""
self.dsn = dsn
self.user = user
self.passwd = passwd
sn = create_buffer(dsn)
un = create_buffer(user)
pw = create_buffer(passwd)
ret = ODBC_API.SQLConnect(self.dbc_h, sn, len(sn), un, len(un), pw, len(pw))
check_success(self, ret)
self.update_db_special_info()
self.connected = 1
def cursor(self, row_type_callable=None):
#self.settimeout(self.timeout)
if not self.connected:
raise ProgrammingError('HY000','Attempt to use a closed connection.')
cur = Cursor(self, row_type_callable=row_type_callable)
# self._cursors.append(cur)
return cur
def update_db_special_info(self):
for sql_type in (
SQL_TYPE_TIMESTAMP,
SQL_TYPE_DATE,
SQL_TYPE_TIME,
SQL_SS_TIME2,
):
cur = Cursor(self)
try:
info_tuple = cur.getTypeInfo(sql_type)
if info_tuple is not None:
self.type_size_dic[sql_type] = info_tuple[2], info_tuple[14]
except:
pass
cur.close()
self.support_SQLDescribeParam = False
try:
driver_name = self.getinfo(SQL_DRIVER_NAME)
if any(x in driver_name for x in ('SQLSRV','ncli','libsqlncli')):
self.support_SQLDescribeParam = True
except:
pass
def commit(self):
if not self.connected:
raise ProgrammingError('HY000','Attempt to use a closed connection.')
ret = SQLEndTran(SQL_HANDLE_DBC, self.dbc_h, SQL_COMMIT)
if ret != SQL_SUCCESS:
check_success(self, ret)
def rollback(self):
if not self.connected:
raise ProgrammingError('HY000','Attempt to use a closed connection.')
ret = SQLEndTran(SQL_HANDLE_DBC, self.dbc_h, SQL_ROLLBACK)
if ret != SQL_SUCCESS:
check_success(self, ret)
def getinfo(self,infotype):
if infotype not in list(aInfoTypes.keys()):
raise ProgrammingError('HY000','Invalid getinfo value: '+str(infotype))
if aInfoTypes[infotype] == 'GI_UINTEGER':
total_buf_len = 1000
alloc_buffer = ctypes.c_ulong()
used_buf_len = c_short()
ret = ODBC_API.SQLGetInfo(self.dbc_h,infotype,ADDR(alloc_buffer), total_buf_len,\
ADDR(used_buf_len))
check_success(self, ret)
result = alloc_buffer.value
elif aInfoTypes[infotype] == 'GI_USMALLINT':
total_buf_len = 1000
alloc_buffer = ctypes.c_ushort()
used_buf_len = c_short()
ret = ODBC_API.SQLGetInfo(self.dbc_h,infotype,ADDR(alloc_buffer), total_buf_len,\
ADDR(used_buf_len))
check_success(self, ret)
result = alloc_buffer.value
else:
total_buf_len = 1000
alloc_buffer = create_buffer(total_buf_len)
used_buf_len = c_short()
if self.ansi:
API_f = ODBC_API.SQLGetInfo
else:
API_f = ODBC_API.SQLGetInfoW
ret = API_f(self.dbc_h,infotype,ADDR(alloc_buffer), total_buf_len,\
ADDR(used_buf_len))
check_success(self, ret)
if self.ansi:
result = alloc_buffer.value
else:
result = UCS_dec(alloc_buffer)
if aInfoTypes[infotype] == 'GI_YESNO':
if unicode(result[0]) == unicode('Y'):
result = True
else:
result = False
return result
def __exit__(self, type, value, traceback):
if value:
self.rollback()
else:
self.commit()
if self.connected:
self.close()
def __enter__(self):
return self
def __del__(self):
if self.connected:
self.close()
def close(self):
if not self.connected:
raise ProgrammingError('HY000','Attempt to close a closed connection.')
# for cur in self._cursors:
# if not cur is None:
# if not cur.closed:
# cur.close()
if self.connected:
#if DEBUG:print 'disconnect'
if not self.autocommit:
self.rollback()
ret = ODBC_API.SQLDisconnect(self.dbc_h)
check_success(self, ret)
#if DEBUG:print 'free dbc'
ret = ODBC_API.SQLFreeHandle(SQL_HANDLE_DBC, self.dbc_h)
check_success(self, ret)
# if shared_env_h.value:
# #if DEBUG:print 'env'
# ret = ODBC_API.SQLFreeHandle(SQL_HANDLE_ENV, shared_env_h)
# check_success(shared_env_h, ret)
self.connected = 0
odbc = Connection
connect = odbc
'''
def connect(connectString = '', autocommit = False, ansi = False, timeout = 0, unicode_results = False, readonly = False, **kargs):
return odbc(connectString, autocommit, ansi, timeout, unicode_results, readonly, kargs)
'''
def drivers():
if sys.platform not in ('win32','cli'):
raise Exception('This function is available for use in Windows only.')
try:
lock.acquire()
if shared_env_h is None:
AllocateEnv()
finally:
lock.release()
DriverDescription = create_buffer_u(1000)
BufferLength1 = c_short(1000)
DescriptionLength = c_short()
DriverAttributes = create_buffer_u(1000)
BufferLength2 = c_short(1000)
AttributesLength = c_short()
ret = SQL_SUCCESS
DriverList = []
Direction = SQL_FETCH_FIRST
while ret != SQL_NO_DATA:
ret = ODBC_API.SQLDriversW(shared_env_h, Direction , DriverDescription , BufferLength1
, ADDR(DescriptionLength), DriverAttributes, BufferLength2, ADDR(AttributesLength))
check_success(shared_env_h, ret)
DriverList.append(DriverDescription.value)
if Direction == SQL_FETCH_FIRST:
Direction = SQL_FETCH_NEXT
return DriverList
def win_create_mdb(mdb_path, sort_order = "General\0\0"):
if sys.platform not in ('win32','cli'):
raise Exception('This function is available for use in Windows only.')
mdb_driver = [d for d in drivers() if 'Microsoft Access Driver (*.mdb' in d]
if mdb_driver == []:
raise Exception('Access Driver is not found.')
else:
driver_name = mdb_driver[0].encode('mbcs')
#CREATE_DB=<path name> <sort order>
ctypes.windll.ODBCCP32.SQLConfigDataSource.argtypes = [ctypes.c_void_p,ctypes.c_ushort,ctypes.c_char_p,ctypes.c_char_p]
if py_v3:
c_Path = bytes("CREATE_DB=" + mdb_path + " " + sort_order,'mbcs')
else:
c_Path = "CREATE_DB=" + mdb_path + " " + sort_order
ODBC_ADD_SYS_DSN = 1
ret = ctypes.windll.ODBCCP32.SQLConfigDataSource(None,ODBC_ADD_SYS_DSN,driver_name, c_Path)
if not ret:
raise Exception('Failed to create Access mdb file - "%s". Please check file path, permission and Access driver readiness.' %mdb_path)
def win_connect_mdb(mdb_path):
if sys.platform not in ('win32','cli'):
raise Exception('This function is available for use in Windows only.')
mdb_driver = [d for d in drivers() if 'Microsoft Access Driver (*.mdb' in d]
if mdb_driver == []:
raise Exception('Access Driver is not found.')
else:
driver_name = mdb_driver[0]
return connect('Driver={'+driver_name+"};DBQ="+mdb_path, unicode_results = use_unicode, readonly = False)
def win_compact_mdb(mdb_path, compacted_mdb_path, sort_order = "General\0\0"):
if sys.platform not in ('win32','cli'):
raise Exception('This function is available for use in Windows only.')
mdb_driver = [d for d in drivers() if 'Microsoft Access Driver (*.mdb' in d]
if mdb_driver == []:
raise Exception('Access Driver is not found.')
else:
driver_name = mdb_driver[0].encode('mbcs')
#COMPACT_DB=<source path> <destination path> <sort order>
ctypes.windll.ODBCCP32.SQLConfigDataSource.argtypes = [ctypes.c_void_p,ctypes.c_ushort,ctypes.c_char_p,ctypes.c_char_p]
#driver_name = "Microsoft Access Driver (*.mdb)"
if py_v3:
c_Path = bytes("COMPACT_DB=" + mdb_path + " " + compacted_mdb_path + " " + sort_order,'mbcs')
#driver_name = bytes(driver_name,'mbcs')
else:
c_Path = "COMPACT_DB=" + mdb_path + " " + compacted_mdb_path + " " + sort_order
ODBC_ADD_SYS_DSN = 1
ret = ctypes.windll.ODBCCP32.SQLConfigDataSource(None,ODBC_ADD_SYS_DSN,driver_name, c_Path)
if not ret:
raise Exception('Failed to compact Access mdb file - "%s". Please check file path, permission and Access driver readiness.' %compacted_mdb_path)
def dataSources():
"""Return a list with [name, descrition]"""
dsn = create_buffer(1024)
desc = create_buffer(1024)
dsn_len = c_short()
desc_len = c_short()
dsn_list = {}
try:
lock.acquire()
if shared_env_h is None:
AllocateEnv()
finally:
lock.release()
while 1:
ret = ODBC_API.SQLDataSources(shared_env_h, SQL_FETCH_NEXT, \
dsn, len(dsn), ADDR(dsn_len), desc, len(desc), ADDR(desc_len))
if ret == SQL_NO_DATA_FOUND:
break
elif not ret in (SQL_SUCCESS, SQL_SUCCESS_WITH_INFO):
ctrl_err(SQL_HANDLE_ENV, shared_env_h, ret)
else:
dsn_list[dsn.value] = desc.value
return dsn_list
def monkey_patch_for_gevent():
import functools, gevent
apply_e = gevent.get_hub().threadpool.apply_e
def monkey_patch(func):
@functools.wraps(func)
def wrap(*args, **kwargs):
#if DEBUG:print('%s called with %s %s' % (func, args, kwargs))
return apply_e(Exception, func, args, kwargs)
return wrap
for attr in dir(ODBC_API):
if attr.startswith('SQL') and hasattr(getattr(ODBC_API, attr), 'argtypes'):
setattr(ODBC_API, attr, monkey_patch(getattr(ODBC_API, attr)))
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