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"""
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`PostgreSQL`_ database specific implementations of changeset classes.
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.. _`PostgreSQL`: http://www.postgresql.org/
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"""
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from rhodecode.lib.dbmigrate.migrate.changeset import ansisql, SQLA_06
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if not SQLA_06:
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from sqlalchemy.databases import postgres as sa_base
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PGSchemaGenerator = sa_base.PGSchemaGenerator
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else:
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from sqlalchemy.databases import postgresql as sa_base
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PGSchemaGenerator = sa_base.PGDDLCompiler
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class PGColumnGenerator(PGSchemaGenerator, ansisql.ANSIColumnGenerator):
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"""PostgreSQL column generator implementation."""
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pass
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class PGColumnDropper(ansisql.ANSIColumnDropper):
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"""PostgreSQL column dropper implementation."""
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pass
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class PGSchemaChanger(ansisql.ANSISchemaChanger):
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"""PostgreSQL schema changer implementation."""
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pass
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class PGConstraintGenerator(ansisql.ANSIConstraintGenerator):
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"""PostgreSQL constraint generator implementation."""
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pass
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class PGConstraintDropper(ansisql.ANSIConstraintDropper):
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"""PostgreSQL constaint dropper implementation."""
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pass
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class PGDialect(ansisql.ANSIDialect):
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columngenerator = PGColumnGenerator
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columndropper = PGColumnDropper
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schemachanger = PGSchemaChanger
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constraintgenerator = PGConstraintGenerator
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constraintdropper = PGConstraintDropper
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