79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
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from ..adapters.sap import SAPDB
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from .base import SQLDialect
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from . import dialects, sqltype_for
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@dialects.register_for(SAPDB)
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class SAPDBDialect(SQLDialect):
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@sqltype_for('integer')
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def type_integer(self):
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return 'INT'
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@sqltype_for('text')
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def type_text(self):
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return 'LONG'
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@sqltype_for('bigint')
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def type_bigint(self):
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return 'BIGINT'
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@sqltype_for('double')
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def type_double(self):
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return 'DOUBLE PRECISION'
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@sqltype_for('decimal')
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def type_decimal(self):
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return 'FIXED(%(precision)s,%(scale)s)'
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@sqltype_for('id')
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def type_id(self):
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return 'INT PRIMARY KEY'
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@sqltype_for('big-id')
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def type_big_id(self):
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return 'BIGINT PRIMARY KEY'
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@sqltype_for('reference')
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def type_reference(self):
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return 'INT, FOREIGN KEY (%(field_name)s) REFERENCES ' + \
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'%(foreign_key)s ON DELETE %(on_delete_action)s'
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@sqltype_for('big-reference')
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def type_big_reference(self):
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return 'BIGINT, FOREIGN KEY (%(field_name)s) REFERENCES ' + \
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'%(foreign_key)s ON DELETE %(on_delete_action)s'
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def sequence_name(self, tablename):
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return self.quote('%s_id_Seq' % tablename)
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def select(self, fields, tables, where=None, groupby=None, having=None,
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orderby=None, limitby=None, distinct=False, for_update=False):
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dst, whr, grp, order, limit, offset, upd = '', '', '', '', '', '', ''
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if distinct is True:
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dst = ' DISTINCT'
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elif distinct:
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dst = ' DISTINCT ON (%s)' % distinct
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if where:
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whr = ' %s' % self.where(where)
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if groupby:
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grp = ' GROUP BY %s' % groupby
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if having:
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grp += ' HAVING %s' % having
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if orderby:
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order = ' ORDER BY %s' % orderby
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if limitby:
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(lmin, lmax) = limitby
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if whr:
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whr2 = whr + " AND w_row > %i" % lmin
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else:
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whr2 = self.where('w_row > %i' % lmin)
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return 'SELECT%s %s FROM (SELECT w_tmp.*, ROWNO w_row FROM ' + \
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'(SELECT %s FROM %s%s%s%s) w_tmp WHERE ROWNO=%i) %s%s%s%s;' \
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% (
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dst, fields, fields, tables, whr, grp, order, lmax, tables,
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whr2, grp, order)
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if for_update:
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upd = ' FOR UPDATE'
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return 'SELECT%s%s%s %s FROM %s%s%s%s%s;' % (
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dst, limit, offset, fields, tables, whr, grp, order, upd)
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