43 lines
2.2 KiB
Python
43 lines
2.2 KiB
Python
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from django.db.backends.oracle.creation import DatabaseCreation
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from django.db.backends.util import truncate_name
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class OracleCreation(DatabaseCreation):
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def sql_indexes_for_field(self, model, f, style):
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"Return any spatial index creation SQL for the field."
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from django.contrib.gis.db.models.fields import GeometryField
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output = super(OracleCreation, self).sql_indexes_for_field(model, f, style)
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if isinstance(f, GeometryField):
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gqn = self.connection.ops.geo_quote_name
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qn = self.connection.ops.quote_name
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db_table = model._meta.db_table
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output.append(style.SQL_KEYWORD('INSERT INTO ') +
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style.SQL_TABLE('USER_SDO_GEOM_METADATA') +
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' (%s, %s, %s, %s)\n ' % tuple(map(qn, ['TABLE_NAME', 'COLUMN_NAME', 'DIMINFO', 'SRID'])) +
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style.SQL_KEYWORD(' VALUES ') + '(\n ' +
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style.SQL_TABLE(gqn(db_table)) + ',\n ' +
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style.SQL_FIELD(gqn(f.column)) + ',\n ' +
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style.SQL_KEYWORD("MDSYS.SDO_DIM_ARRAY") + '(\n ' +
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style.SQL_KEYWORD("MDSYS.SDO_DIM_ELEMENT") +
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("('LONG', %s, %s, %s),\n " % (f._extent[0], f._extent[2], f._tolerance)) +
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style.SQL_KEYWORD("MDSYS.SDO_DIM_ELEMENT") +
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("('LAT', %s, %s, %s)\n ),\n" % (f._extent[1], f._extent[3], f._tolerance)) +
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' %s\n );' % f.srid)
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if f.spatial_index:
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# Getting the index name, Oracle doesn't allow object
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# names > 30 characters.
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idx_name = truncate_name('%s_%s_id' % (db_table, f.column), 30)
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output.append(style.SQL_KEYWORD('CREATE INDEX ') +
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style.SQL_TABLE(qn(idx_name)) +
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style.SQL_KEYWORD(' ON ') +
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style.SQL_TABLE(qn(db_table)) + '(' +
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style.SQL_FIELD(qn(f.column)) + ') ' +
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style.SQL_KEYWORD('INDEXTYPE IS ') +
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style.SQL_TABLE('MDSYS.SPATIAL_INDEX') + ';')
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return output
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