360 lines
8.3 KiB
Plaintext
360 lines
8.3 KiB
Plaintext
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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SELECT pg_stat_statements_reset();
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pg_stat_statements_reset
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--------------------------
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(1 row)
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SELECT 1 AS "int";
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int
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-----
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1
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(1 row)
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SELECT 'hello'
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-- multiline
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AS "text";
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text
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-------
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hello
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(1 row)
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SELECT 'world' AS "text";
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text
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-------
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world
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(1 row)
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-- transaction
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BEGIN;
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SELECT 1 AS "int";
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int
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-----
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1
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(1 row)
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SELECT 'hello' AS "text";
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text
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-------
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hello
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(1 row)
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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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?column?
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----------
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5
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(1 row)
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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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i
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---
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1
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2
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(2 rows)
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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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f
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-----
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1.0
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2.0
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(2 rows)
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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query | calls | rows
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-----------------------------------------+-------+------
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SELECT ? +| 4 | 4
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+| |
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AS "text" | |
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SELECT ? + ? | 2 | 2
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SELECT ? + ? + ? AS "add" | 3 | 3
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SELECT ? AS "float" | 1 | 1
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SELECT ? AS "int" | 2 | 2
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SELECT ? AS i UNION SELECT ? ORDER BY i | 1 | 2
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SELECT ? || ? | 1 | 1
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SELECT pg_stat_statements_reset() | 1 | 1
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WITH t(f) AS ( +| 1 | 2
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VALUES (?), (?) +| |
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) +| |
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SELECT f FROM t ORDER BY f | |
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(9 rows)
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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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pg_stat_statements_reset
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--------------------------
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(1 row)
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-- utility "create table" should not be shown
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CREATE 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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-- SELECT with constants
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SELECT * FROM test WHERE a > 5 ORDER BY a ;
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a | b
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---+----------------------
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6 | 666
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7 | aaa
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8 | bbb
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9 | bbb
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(4 rows)
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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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a | b
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---+---
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(0 rows)
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-- SELECT without constants
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SELECT * FROM test ORDER BY a;
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a | b
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---+----------------------
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1 | 111
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2 | 222
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3 | 333
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4 | 444
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5 | 555
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6 | 666
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7 | aaa
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8 | bbb
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9 | bbb
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(9 rows)
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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query | calls | rows
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---------------------------------------------------+-------+------
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DELETE FROM test WHERE a > ? | 1 | 1
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INSERT INTO test VALUES(generate_series(?, ?), ?) | 1 | 10
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SELECT * FROM test ORDER BY a | 1 | 9
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SELECT * FROM test WHERE a > ? ORDER BY a | 2 | 4
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SELECT pg_stat_statements_reset() | 1 | 1
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UPDATE test SET b = ? WHERE a = ? | 6 | 6
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UPDATE test SET b = ? WHERE a > ? | 1 | 3
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(7 rows)
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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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pg_stat_statements_reset
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--------------------------
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(1 row)
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SELECT 1 AS "one";
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one
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-----
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1
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(1 row)
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SELECT 1 + 1 AS "two";
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two
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-----
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2
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(1 row)
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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query | calls | rows
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-------+-------+------
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(0 rows)
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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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pg_stat_statements_reset
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--------------------------
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(1 row)
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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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plus_two
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----------
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5
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(1 row)
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SELECT PLUS_TWO(7);
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plus_two
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----------
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9
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(1 row)
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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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plus_one
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----------
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9
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(1 row)
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SELECT PLUS_ONE(10);
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plus_one
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----------
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11
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(1 row)
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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query | calls | rows
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-----------------------------------+-------+------
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SELECT ?::TEXT | 1 | 1
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SELECT PLUS_ONE(?) | 2 | 2
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SELECT PLUS_TWO(?) | 2 | 2
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SELECT pg_stat_statements_reset() | 1 | 1
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(4 rows)
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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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pg_stat_statements_reset
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--------------------------
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(1 row)
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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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plus_two
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----------
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1
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(1 row)
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SELECT PLUS_TWO(2);
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plus_two
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----------
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4
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(1 row)
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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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plus_one
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----------
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4
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(1 row)
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SELECT PLUS_ONE(1);
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plus_one
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----------
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2
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(1 row)
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SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
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query | calls | rows
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-----------------------------------+-------+------
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SELECT (i + ? + ?)::INTEGER | 2 | 2
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SELECT (i + ?)::INTEGER LIMIT ? | 2 | 2
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SELECT PLUS_ONE(?) | 2 | 2
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SELECT PLUS_TWO(?) | 2 | 2
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SELECT pg_stat_statements_reset() | 1 | 1
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(5 rows)
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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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pg_stat_statements_reset
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--------------------------
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(1 row)
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SELECT 1;
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?column?
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----------
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1
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(1 row)
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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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NOTICE: table "test" does not exist, skipping
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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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NOTICE: table "test" does not exist, skipping
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NOTICE: table "test" does not exist, skipping
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NOTICE: function plus_one(pg_catalog.int4) does not exist, skipping
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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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query | calls | rows
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-------------------------------------------+-------+------
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CREATE INDEX test_b ON test(b) | 1 | 0
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DROP FUNCTION IF EXISTS PLUS_ONE(INTEGER) | 1 | 0
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DROP FUNCTION PLUS_ONE(INTEGER) | 1 | 0
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DROP FUNCTION PLUS_TWO(INTEGER) | 1 | 0
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DROP TABLE IF EXISTS test | 3 | 0
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DROP TABLE test | 1 | 0
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SELECT ? | 1 | 1
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SELECT pg_stat_statements_reset() | 1 | 1
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(8 rows)
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DROP EXTENSION pg_stat_statements;
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