468 lines
12 KiB
PL/PgSQL
468 lines
12 KiB
PL/PgSQL
CREATE EXTENSION pg_stat_statements;
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--
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-- simple and compound statements
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--
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SET pg_stat_statements.track_utility = FALSE;
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SET pg_stat_statements.track_planning = TRUE;
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SELECT pg_stat_statements_reset();
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SELECT 1 AS "int";
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SELECT 'hello'
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-- multiline
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AS "text";
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SELECT 'world' AS "text";
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-- transaction
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BEGIN;
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SELECT 1 AS "int";
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SELECT 'hello' AS "text";
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COMMIT;
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-- compound transaction
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BEGIN \;
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SELECT 2.0 AS "float" \;
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SELECT 'world' AS "text" \;
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COMMIT;
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-- compound with empty statements and spurious leading spacing
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\;\; SELECT 3 + 3 \;\;\; SELECT ' ' || ' !' \;\; SELECT 1 + 4 \;;
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-- non ;-terminated statements
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SELECT 1 + 1 + 1 AS "add" \gset
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SELECT :add + 1 + 1 AS "add" \;
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SELECT :add + 1 + 1 AS "add" \gset
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-- set operator
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SELECT 1 AS i UNION SELECT 2 ORDER BY i;
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-- ? operator
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select '{"a":1, "b":2}'::jsonb ? 'b';
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-- cte
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WITH t(f) AS (
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VALUES (1.0), (2.0)
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)
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SELECT f FROM t ORDER BY f;
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-- prepared statement with parameter
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PREPARE pgss_test (int) AS SELECT $1, 'test' LIMIT 1;
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EXECUTE pgss_test(1);
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DEALLOCATE pgss_test;
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- CRUD: INSERT SELECT UPDATE DELETE on test table
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--
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SELECT pg_stat_statements_reset();
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-- utility "create table" should not be shown
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CREATE TEMP TABLE test (a int, b char(20));
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INSERT INTO test VALUES(generate_series(1, 10), 'aaa');
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UPDATE test SET b = 'bbb' WHERE a > 7;
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DELETE FROM test WHERE a > 9;
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-- explicit transaction
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BEGIN;
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UPDATE test SET b = '111' WHERE a = 1 ;
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COMMIT;
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BEGIN \;
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UPDATE test SET b = '222' WHERE a = 2 \;
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COMMIT ;
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UPDATE test SET b = '333' WHERE a = 3 \;
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UPDATE test SET b = '444' WHERE a = 4 ;
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BEGIN \;
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UPDATE test SET b = '555' WHERE a = 5 \;
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UPDATE test SET b = '666' WHERE a = 6 \;
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COMMIT ;
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-- many INSERT values
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INSERT INTO test (a, b) VALUES (1, 'a'), (2, 'b'), (3, 'c');
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-- SELECT with constants
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SELECT * FROM test WHERE a > 5 ORDER BY a ;
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SELECT *
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FROM test
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WHERE a > 9
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ORDER BY a ;
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-- SELECT without constants
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SELECT * FROM test ORDER BY a;
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-- SELECT with IN clause
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SELECT * FROM test WHERE a IN (1, 2, 3, 4, 5);
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-- MERGE
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MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
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WHEN MATCHED THEN UPDATE SET b = st.b || st.a::text;
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MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
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WHEN MATCHED THEN UPDATE SET b = test.b || st.a::text;
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MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
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WHEN MATCHED AND length(st.b) > 1 THEN UPDATE SET b = test.b || st.a::text;
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MERGE INTO test USING test st ON (st.a = test.a)
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WHEN NOT MATCHED THEN INSERT (a, b) VALUES (0, NULL);
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MERGE INTO test USING test st ON (st.a = test.a)
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WHEN NOT MATCHED THEN INSERT VALUES (0, NULL); -- same as above
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MERGE INTO test USING test st ON (st.a = test.a)
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WHEN NOT MATCHED THEN INSERT (b, a) VALUES (NULL, 0);
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MERGE INTO test USING test st ON (st.a = test.a)
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WHEN NOT MATCHED THEN INSERT (a) VALUES (0);
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MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
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WHEN MATCHED THEN DELETE;
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MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
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WHEN MATCHED THEN DO NOTHING;
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MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
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WHEN NOT MATCHED THEN DO NOTHING;
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- INSERT, UPDATE, DELETE on test table to validate WAL generation metrics
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--
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SELECT pg_stat_statements_reset();
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-- utility "create table" should not be shown
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CREATE TABLE pgss_test (a int, b char(20));
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INSERT INTO pgss_test VALUES(generate_series(1, 10), 'aaa');
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UPDATE pgss_test SET b = 'bbb' WHERE a > 7;
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DELETE FROM pgss_test WHERE a > 9;
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-- DROP test table
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SET pg_stat_statements.track_utility = TRUE;
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DROP TABLE pgss_test;
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SET pg_stat_statements.track_utility = FALSE;
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-- Check WAL is generated for the above statements
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SELECT query, calls, rows,
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wal_bytes > 0 as wal_bytes_generated,
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wal_records > 0 as wal_records_generated,
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wal_records = rows as wal_records_as_rows
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FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- pg_stat_statements.track = none
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--
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SET pg_stat_statements.track = 'none';
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SELECT pg_stat_statements_reset();
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SELECT 1 AS "one";
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SELECT 1 + 1 AS "two";
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- pg_stat_statements.track = top
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--
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SET pg_stat_statements.track = 'top';
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SELECT pg_stat_statements_reset();
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DO LANGUAGE plpgsql $$
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BEGIN
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-- this is a SELECT
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PERFORM 'hello world'::TEXT;
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END;
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$$;
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-- PL/pgSQL function
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CREATE FUNCTION PLUS_TWO(i INTEGER) RETURNS INTEGER AS $$
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DECLARE
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r INTEGER;
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BEGIN
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SELECT (i + 1 + 1.0)::INTEGER INTO r;
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RETURN r;
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END; $$ LANGUAGE plpgsql;
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SELECT PLUS_TWO(3);
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SELECT PLUS_TWO(7);
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-- SQL function --- use LIMIT to keep it from being inlined
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CREATE FUNCTION PLUS_ONE(i INTEGER) RETURNS INTEGER AS
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$$ SELECT (i + 1.0)::INTEGER LIMIT 1 $$ LANGUAGE SQL;
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SELECT PLUS_ONE(8);
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SELECT PLUS_ONE(10);
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- pg_stat_statements.track = all
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--
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SET pg_stat_statements.track = 'all';
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SELECT pg_stat_statements_reset();
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-- we drop and recreate the functions to avoid any caching funnies
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DROP FUNCTION PLUS_ONE(INTEGER);
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DROP FUNCTION PLUS_TWO(INTEGER);
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-- PL/pgSQL function
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CREATE FUNCTION PLUS_TWO(i INTEGER) RETURNS INTEGER AS $$
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DECLARE
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r INTEGER;
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BEGIN
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SELECT (i + 1 + 1.0)::INTEGER INTO r;
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RETURN r;
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END; $$ LANGUAGE plpgsql;
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SELECT PLUS_TWO(-1);
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SELECT PLUS_TWO(2);
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-- SQL function --- use LIMIT to keep it from being inlined
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CREATE FUNCTION PLUS_ONE(i INTEGER) RETURNS INTEGER AS
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$$ SELECT (i + 1.0)::INTEGER LIMIT 1 $$ LANGUAGE SQL;
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SELECT PLUS_ONE(3);
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SELECT PLUS_ONE(1);
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- queries with locking clauses
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--
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CREATE TABLE pgss_a (id integer PRIMARY KEY);
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CREATE TABLE pgss_b (id integer PRIMARY KEY, a_id integer REFERENCES pgss_a);
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SELECT pg_stat_statements_reset();
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-- control query
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id;
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-- test range tables
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE;
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_a;
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_b;
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_a, pgss_b; -- matches plain "FOR UPDATE"
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_b, pgss_a;
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-- test strengths
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR NO KEY UPDATE;
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR SHARE;
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR KEY SHARE;
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-- test wait policies
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE NOWAIT;
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SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE SKIP LOCKED;
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SELECT calls, query FROM pg_stat_statements ORDER BY query COLLATE "C";
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DROP TABLE pgss_a, pgss_b CASCADE;
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--
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-- utility commands
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--
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SET pg_stat_statements.track_utility = TRUE;
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SELECT pg_stat_statements_reset();
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SELECT 1;
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CREATE INDEX test_b ON test(b);
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DROP TABLE test \;
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DROP TABLE IF EXISTS test \;
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DROP FUNCTION PLUS_ONE(INTEGER);
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DROP TABLE IF EXISTS test \;
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DROP TABLE IF EXISTS test \;
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DROP FUNCTION IF EXISTS PLUS_ONE(INTEGER);
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DROP FUNCTION PLUS_TWO(INTEGER);
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- Track the total number of rows retrieved or affected by the utility
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-- commands of COPY, FETCH, CREATE TABLE AS, CREATE MATERIALIZED VIEW,
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-- REFRESH MATERIALIZED VIEW and SELECT INTO
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--
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SELECT pg_stat_statements_reset();
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CREATE TABLE pgss_ctas AS SELECT a, 'ctas' b FROM generate_series(1, 10) a;
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SELECT generate_series(1, 10) c INTO pgss_select_into;
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COPY pgss_ctas (a, b) FROM STDIN;
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11 copy
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12 copy
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13 copy
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\.
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CREATE MATERIALIZED VIEW pgss_matv AS SELECT * FROM pgss_ctas;
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REFRESH MATERIALIZED VIEW pgss_matv;
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BEGIN;
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DECLARE pgss_cursor CURSOR FOR SELECT * FROM pgss_matv;
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FETCH NEXT pgss_cursor;
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FETCH FORWARD 5 pgss_cursor;
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FETCH FORWARD ALL pgss_cursor;
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COMMIT;
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SELECT query, plans, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- Track user activity and reset them
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--
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SELECT pg_stat_statements_reset();
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CREATE ROLE regress_stats_user1;
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CREATE ROLE regress_stats_user2;
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SET ROLE regress_stats_user1;
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SELECT 1 AS "ONE";
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SELECT 1+1 AS "TWO";
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RESET ROLE;
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SET ROLE regress_stats_user2;
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SELECT 1 AS "ONE";
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SELECT 1+1 AS "TWO";
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RESET ROLE;
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- Don't reset anything if any of the parameter is NULL
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--
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SELECT pg_stat_statements_reset(NULL);
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- remove query ('SELECT $1+$2 AS "TWO"') executed by regress_stats_user2
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-- in the current_database
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--
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SELECT pg_stat_statements_reset(
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(SELECT r.oid FROM pg_roles AS r WHERE r.rolname = 'regress_stats_user2'),
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(SELECT d.oid FROM pg_database As d where datname = current_database()),
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(SELECT s.queryid FROM pg_stat_statements AS s
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WHERE s.query = 'SELECT $1+$2 AS "TWO"' LIMIT 1));
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- remove query ('SELECT $1 AS "ONE"') executed by two users
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--
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SELECT pg_stat_statements_reset(0,0,s.queryid)
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FROM pg_stat_statements AS s WHERE s.query = 'SELECT $1 AS "ONE"';
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- remove query of a user (regress_stats_user1)
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--
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SELECT pg_stat_statements_reset(r.oid)
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FROM pg_roles AS r WHERE r.rolname = 'regress_stats_user1';
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- reset all
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--
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SELECT pg_stat_statements_reset(0,0,0);
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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--
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-- cleanup
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--
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DROP ROLE regress_stats_user1;
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DROP ROLE regress_stats_user2;
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DROP MATERIALIZED VIEW pgss_matv;
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DROP TABLE pgss_ctas;
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DROP TABLE pgss_select_into;
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--
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-- [re]plan counting
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--
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SELECT pg_stat_statements_reset();
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CREATE TABLE test ();
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PREPARE prep1 AS SELECT COUNT(*) FROM test;
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EXECUTE prep1;
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EXECUTE prep1;
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EXECUTE prep1;
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ALTER TABLE test ADD COLUMN x int;
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EXECUTE prep1;
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SELECT 42;
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SELECT 42;
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SELECT 42;
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SELECT query, plans, calls, rows FROM pg_stat_statements
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WHERE query NOT LIKE 'PREPARE%' ORDER BY query COLLATE "C";
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-- for the prepared statement we expect at least one replan, but cache
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-- invalidations could force more
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SELECT query, plans >= 2 AND plans <= calls AS plans_ok, calls, rows FROM pg_stat_statements
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WHERE query LIKE 'PREPARE%' ORDER BY query COLLATE "C";
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--
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-- access to pg_stat_statements_info view
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--
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SELECT pg_stat_statements_reset();
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SELECT dealloc FROM pg_stat_statements_info;
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--
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-- top level handling
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--
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SET pg_stat_statements.track = 'top';
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DELETE FROM test;
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DO $$
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BEGIN
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DELETE FROM test;
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END;
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$$ LANGUAGE plpgsql;
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SELECT query, toplevel, plans, calls FROM pg_stat_statements WHERE query LIKE '%DELETE%' ORDER BY query COLLATE "C", toplevel;
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SET pg_stat_statements.track = 'all';
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DELETE FROM test;
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DO $$
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BEGIN
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DELETE FROM test;
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END;
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$$ LANGUAGE plpgsql;
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SELECT query, toplevel, plans, calls FROM pg_stat_statements WHERE query LIKE '%DELETE%' ORDER BY query COLLATE "C", toplevel;
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-- FROM [ONLY]
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CREATE TABLE tbl_inh(id integer);
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CREATE TABLE tbl_inh_1() INHERITS (tbl_inh);
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INSERT INTO tbl_inh_1 SELECT 1;
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SELECT * FROM tbl_inh;
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SELECT * FROM ONLY tbl_inh;
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SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%FROM%tbl_inh%';
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-- WITH TIES
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CREATE TABLE limitoption AS SELECT 0 AS val FROM generate_series(1, 10);
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SELECT *
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FROM limitoption
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WHERE val < 2
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ORDER BY val
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FETCH FIRST 2 ROWS WITH TIES;
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SELECT *
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FROM limitoption
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WHERE val < 2
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ORDER BY val
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FETCH FIRST 2 ROW ONLY;
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SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%FETCH FIRST%';
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-- GROUP BY [DISTINCT]
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SELECT a, b, c
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FROM (VALUES (1, 2, 3), (4, NULL, 6), (7, 8, 9)) AS t (a, b, c)
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GROUP BY ROLLUP(a, b), rollup(a, c)
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ORDER BY a, b, c;
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SELECT a, b, c
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FROM (VALUES (1, 2, 3), (4, NULL, 6), (7, 8, 9)) AS t (a, b, c)
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GROUP BY DISTINCT ROLLUP(a, b), rollup(a, c)
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ORDER BY a, b, c;
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SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%GROUP BY%ROLLUP%';
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-- GROUPING SET agglevelsup
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SELECT (
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SELECT (
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SELECT GROUPING(a,b) FROM (VALUES (1)) v2(c)
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) FROM (VALUES (1,2)) v1(a,b) GROUP BY (a,b)
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) FROM (VALUES(6,7)) v3(e,f) GROUP BY ROLLUP(e,f);
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SELECT (
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SELECT (
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SELECT GROUPING(e,f) FROM (VALUES (1)) v2(c)
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) FROM (VALUES (1,2)) v1(a,b) GROUP BY (a,b)
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) FROM (VALUES(6,7)) v3(e,f) GROUP BY ROLLUP(e,f);
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SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%SELECT GROUPING%';
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DROP EXTENSION pg_stat_statements;
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