0a218da835
Use the Windshaft query-rewriter interface to adapt queries so they use available overview tables. This requires a version of Windshaft that implements the query-rewriter interface (package.json/npm-shrinkwap.json have yet to be updated)
47 lines
2.6 KiB
PL/PgSQL
47 lines
2.6 KiB
PL/PgSQL
-- Mockup for CDB_Overviews
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CREATE OR REPLACE FUNCTION CDB_Overviews(table_names regclass[])
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RETURNS TABLE(base_table regclass, z integer, overview_table regclass)
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AS $$
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BEGIN
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IF (SELECT 'test_table_overviews'::regclass = ANY (table_names)) THEN
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RETURN QUERY
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SELECT 'test_table_overviews'::regclass AS base_table, 1 AS z, '_vovw_1_test_table_overviews'::regclass AS overview_table
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UNION ALL
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SELECT 'test_table_overviews'::regclass AS base_table, 2 AS z, '_vovw_2_test_table_overviews'::regclass AS overview_table;
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ELSE
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RETURN;
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END IF;
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END
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$$ LANGUAGE PLPGSQL;
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CREATE OR REPLACE FUNCTION CDB_ZoomFromScale(scaleDenominator numeric) RETURNS int AS $$
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BEGIN
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CASE
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WHEN scaleDenominator > 500000000 THEN RETURN 0;
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WHEN scaleDenominator <= 500000000 AND scaleDenominator > 200000000 THEN RETURN 1;
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WHEN scaleDenominator <= 200000000 AND scaleDenominator > 100000000 THEN RETURN 2;
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WHEN scaleDenominator <= 100000000 AND scaleDenominator > 50000000 THEN RETURN 3;
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WHEN scaleDenominator <= 50000000 AND scaleDenominator > 25000000 THEN RETURN 4;
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WHEN scaleDenominator <= 25000000 AND scaleDenominator > 12500000 THEN RETURN 5;
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WHEN scaleDenominator <= 12500000 AND scaleDenominator > 6500000 THEN RETURN 6;
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WHEN scaleDenominator <= 6500000 AND scaleDenominator > 3000000 THEN RETURN 7;
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WHEN scaleDenominator <= 3000000 AND scaleDenominator > 1500000 THEN RETURN 8;
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WHEN scaleDenominator <= 1500000 AND scaleDenominator > 750000 THEN RETURN 9;
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WHEN scaleDenominator <= 750000 AND scaleDenominator > 400000 THEN RETURN 10;
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WHEN scaleDenominator <= 400000 AND scaleDenominator > 200000 THEN RETURN 11;
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WHEN scaleDenominator <= 200000 AND scaleDenominator > 100000 THEN RETURN 12;
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WHEN scaleDenominator <= 100000 AND scaleDenominator > 50000 THEN RETURN 13;
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WHEN scaleDenominator <= 50000 AND scaleDenominator > 25000 THEN RETURN 14;
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WHEN scaleDenominator <= 25000 AND scaleDenominator > 12500 THEN RETURN 15;
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WHEN scaleDenominator <= 12500 AND scaleDenominator > 5000 THEN RETURN 16;
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WHEN scaleDenominator <= 5000 AND scaleDenominator > 2500 THEN RETURN 17;
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WHEN scaleDenominator <= 2500 AND scaleDenominator > 1500 THEN RETURN 18;
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WHEN scaleDenominator <= 1500 AND scaleDenominator > 750 THEN RETURN 19;
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WHEN scaleDenominator <= 750 AND scaleDenominator > 500 THEN RETURN 20;
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WHEN scaleDenominator <= 500 AND scaleDenominator > 250 THEN RETURN 21;
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WHEN scaleDenominator <= 250 AND scaleDenominator > 100 THEN RETURN 22;
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WHEN scaleDenominator <= 100 THEN RETURN 23;
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END CASE;
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END
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$$ LANGUAGE plpgsql IMMUTABLE;
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