422 lines
13 KiB
PL/PgSQL
422 lines
13 KiB
PL/PgSQL
--
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-- CREATE_FUNCTION_SQL
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--
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-- Assorted tests using SQL-language functions
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--
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-- All objects made in this test are in temp_func_test schema
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CREATE USER regress_unpriv_user;
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CREATE SCHEMA temp_func_test;
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GRANT ALL ON SCHEMA temp_func_test TO public;
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SET search_path TO temp_func_test, public;
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--
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-- Make sanity checks on the pg_proc entries created by CREATE FUNCTION
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--
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--
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-- ARGUMENT and RETURN TYPES
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--
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CREATE FUNCTION functest_A_1(text, date) RETURNS bool LANGUAGE 'sql'
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AS 'SELECT $1 = ''abcd'' AND $2 > ''2001-01-01''';
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CREATE FUNCTION functest_A_2(text[]) RETURNS int LANGUAGE 'sql'
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AS 'SELECT $1[1]::int';
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CREATE FUNCTION functest_A_3() RETURNS bool LANGUAGE 'sql'
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AS 'SELECT false';
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SELECT proname, prorettype::regtype, proargtypes::regtype[] FROM pg_proc
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WHERE oid in ('functest_A_1'::regproc,
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'functest_A_2'::regproc,
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'functest_A_3'::regproc) ORDER BY proname;
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SELECT functest_A_1('abcd', '2020-01-01');
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SELECT functest_A_2(ARRAY['1', '2', '3']);
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SELECT functest_A_3();
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--
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-- IMMUTABLE | STABLE | VOLATILE
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--
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CREATE FUNCTION functest_B_1(int) RETURNS bool LANGUAGE 'sql'
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AS 'SELECT $1 > 0';
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CREATE FUNCTION functest_B_2(int) RETURNS bool LANGUAGE 'sql'
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IMMUTABLE AS 'SELECT $1 > 0';
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CREATE FUNCTION functest_B_3(int) RETURNS bool LANGUAGE 'sql'
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STABLE AS 'SELECT $1 = 0';
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CREATE FUNCTION functest_B_4(int) RETURNS bool LANGUAGE 'sql'
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VOLATILE AS 'SELECT $1 < 0';
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SELECT proname, provolatile FROM pg_proc
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WHERE oid in ('functest_B_1'::regproc,
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'functest_B_2'::regproc,
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'functest_B_3'::regproc,
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'functest_B_4'::regproc) ORDER BY proname;
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ALTER FUNCTION functest_B_2(int) VOLATILE;
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ALTER FUNCTION functest_B_3(int) COST 100; -- unrelated change, no effect
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SELECT proname, provolatile FROM pg_proc
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WHERE oid in ('functest_B_1'::regproc,
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'functest_B_2'::regproc,
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'functest_B_3'::regproc,
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'functest_B_4'::regproc) ORDER BY proname;
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--
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-- SECURITY DEFINER | INVOKER
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--
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CREATE FUNCTION functest_C_1(int) RETURNS bool LANGUAGE 'sql'
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AS 'SELECT $1 > 0';
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CREATE FUNCTION functest_C_2(int) RETURNS bool LANGUAGE 'sql'
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SECURITY DEFINER AS 'SELECT $1 = 0';
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CREATE FUNCTION functest_C_3(int) RETURNS bool LANGUAGE 'sql'
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SECURITY INVOKER AS 'SELECT $1 < 0';
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SELECT proname, prosecdef FROM pg_proc
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WHERE oid in ('functest_C_1'::regproc,
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'functest_C_2'::regproc,
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'functest_C_3'::regproc) ORDER BY proname;
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ALTER FUNCTION functest_C_1(int) IMMUTABLE; -- unrelated change, no effect
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ALTER FUNCTION functest_C_2(int) SECURITY INVOKER;
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ALTER FUNCTION functest_C_3(int) SECURITY DEFINER;
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SELECT proname, prosecdef FROM pg_proc
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WHERE oid in ('functest_C_1'::regproc,
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'functest_C_2'::regproc,
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'functest_C_3'::regproc) ORDER BY proname;
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--
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-- LEAKPROOF
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--
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CREATE FUNCTION functest_E_1(int) RETURNS bool LANGUAGE 'sql'
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AS 'SELECT $1 > 100';
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CREATE FUNCTION functest_E_2(int) RETURNS bool LANGUAGE 'sql'
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LEAKPROOF AS 'SELECT $1 > 100';
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SELECT proname, proleakproof FROM pg_proc
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WHERE oid in ('functest_E_1'::regproc,
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'functest_E_2'::regproc) ORDER BY proname;
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ALTER FUNCTION functest_E_1(int) LEAKPROOF;
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ALTER FUNCTION functest_E_2(int) STABLE; -- unrelated change, no effect
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SELECT proname, proleakproof FROM pg_proc
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WHERE oid in ('functest_E_1'::regproc,
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'functest_E_2'::regproc) ORDER BY proname;
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ALTER FUNCTION functest_E_2(int) NOT LEAKPROOF; -- remove leakproof attribute
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SELECT proname, proleakproof FROM pg_proc
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WHERE oid in ('functest_E_1'::regproc,
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'functest_E_2'::regproc) ORDER BY proname;
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-- it takes superuser privilege to turn on leakproof, but not to turn off
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ALTER FUNCTION functest_E_1(int) OWNER TO regress_unpriv_user;
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ALTER FUNCTION functest_E_2(int) OWNER TO regress_unpriv_user;
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SET SESSION AUTHORIZATION regress_unpriv_user;
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SET search_path TO temp_func_test, public;
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ALTER FUNCTION functest_E_1(int) NOT LEAKPROOF;
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ALTER FUNCTION functest_E_2(int) LEAKPROOF;
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CREATE FUNCTION functest_E_3(int) RETURNS bool LANGUAGE 'sql'
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LEAKPROOF AS 'SELECT $1 < 200'; -- fail
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RESET SESSION AUTHORIZATION;
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--
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-- CALLED ON NULL INPUT | RETURNS NULL ON NULL INPUT | STRICT
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--
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CREATE FUNCTION functest_F_1(int) RETURNS bool LANGUAGE 'sql'
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AS 'SELECT $1 > 50';
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CREATE FUNCTION functest_F_2(int) RETURNS bool LANGUAGE 'sql'
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CALLED ON NULL INPUT AS 'SELECT $1 = 50';
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CREATE FUNCTION functest_F_3(int) RETURNS bool LANGUAGE 'sql'
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RETURNS NULL ON NULL INPUT AS 'SELECT $1 < 50';
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CREATE FUNCTION functest_F_4(int) RETURNS bool LANGUAGE 'sql'
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STRICT AS 'SELECT $1 = 50';
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SELECT proname, proisstrict FROM pg_proc
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WHERE oid in ('functest_F_1'::regproc,
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'functest_F_2'::regproc,
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'functest_F_3'::regproc,
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'functest_F_4'::regproc) ORDER BY proname;
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ALTER FUNCTION functest_F_1(int) IMMUTABLE; -- unrelated change, no effect
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ALTER FUNCTION functest_F_2(int) STRICT;
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ALTER FUNCTION functest_F_3(int) CALLED ON NULL INPUT;
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SELECT proname, proisstrict FROM pg_proc
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WHERE oid in ('functest_F_1'::regproc,
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'functest_F_2'::regproc,
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'functest_F_3'::regproc,
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'functest_F_4'::regproc) ORDER BY proname;
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-- pg_get_functiondef tests
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SELECT pg_get_functiondef('functest_A_1'::regproc);
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SELECT pg_get_functiondef('functest_B_3'::regproc);
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SELECT pg_get_functiondef('functest_C_3'::regproc);
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SELECT pg_get_functiondef('functest_F_2'::regproc);
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--
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-- SQL-standard body
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--
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CREATE FUNCTION functest_S_1(a text, b date) RETURNS boolean
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LANGUAGE SQL
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RETURN a = 'abcd' AND b > '2001-01-01';
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CREATE FUNCTION functest_S_2(a text[]) RETURNS int
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RETURN a[1]::int;
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CREATE FUNCTION functest_S_3() RETURNS boolean
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RETURN false;
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CREATE FUNCTION functest_S_3a() RETURNS boolean
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BEGIN ATOMIC
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;;RETURN false;;
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END;
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CREATE FUNCTION functest_S_10(a text, b date) RETURNS boolean
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LANGUAGE SQL
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BEGIN ATOMIC
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SELECT a = 'abcd' AND b > '2001-01-01';
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END;
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CREATE FUNCTION functest_S_13() RETURNS boolean
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BEGIN ATOMIC
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SELECT 1;
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SELECT false;
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END;
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-- check display of function arguments in sub-SELECT
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CREATE TABLE functest1 (i int);
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CREATE FUNCTION functest_S_16(a int, b int) RETURNS void
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LANGUAGE SQL
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BEGIN ATOMIC
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INSERT INTO functest1 SELECT a + $2;
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END;
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-- error: duplicate function body
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CREATE FUNCTION functest_S_xxx(x int) RETURNS int
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LANGUAGE SQL
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AS $$ SELECT x * 2 $$
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RETURN x * 3;
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-- polymorphic arguments not allowed in this form
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CREATE FUNCTION functest_S_xx(x anyarray) RETURNS anyelement
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LANGUAGE SQL
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RETURN x[1];
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-- check reporting of parse-analysis errors
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CREATE FUNCTION functest_S_xx(x date) RETURNS boolean
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LANGUAGE SQL
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RETURN x > 1;
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-- tricky parsing
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CREATE FUNCTION functest_S_15(x int) RETURNS boolean
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LANGUAGE SQL
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BEGIN ATOMIC
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select case when x % 2 = 0 then true else false end;
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END;
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SELECT functest_S_1('abcd', '2020-01-01');
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SELECT functest_S_2(ARRAY['1', '2', '3']);
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SELECT functest_S_3();
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SELECT functest_S_10('abcd', '2020-01-01');
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SELECT functest_S_13();
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SELECT pg_get_functiondef('functest_S_1'::regproc);
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SELECT pg_get_functiondef('functest_S_2'::regproc);
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SELECT pg_get_functiondef('functest_S_3'::regproc);
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SELECT pg_get_functiondef('functest_S_3a'::regproc);
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SELECT pg_get_functiondef('functest_S_10'::regproc);
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SELECT pg_get_functiondef('functest_S_13'::regproc);
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SELECT pg_get_functiondef('functest_S_15'::regproc);
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SELECT pg_get_functiondef('functest_S_16'::regproc);
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DROP TABLE functest1 CASCADE;
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-- test with views
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CREATE TABLE functest3 (a int);
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INSERT INTO functest3 VALUES (1), (2);
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CREATE VIEW functestv3 AS SELECT * FROM functest3;
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CREATE FUNCTION functest_S_14() RETURNS bigint
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RETURN (SELECT count(*) FROM functestv3);
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SELECT functest_S_14();
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DROP TABLE functest3 CASCADE;
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-- information_schema tests
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CREATE FUNCTION functest_IS_1(a int, b int default 1, c text default 'foo')
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RETURNS int
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LANGUAGE SQL
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AS 'SELECT $1 + $2';
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CREATE FUNCTION functest_IS_2(out a int, b int default 1)
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RETURNS int
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LANGUAGE SQL
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AS 'SELECT $1';
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CREATE FUNCTION functest_IS_3(a int default 1, out b int)
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RETURNS int
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LANGUAGE SQL
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AS 'SELECT $1';
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SELECT routine_name, ordinal_position, parameter_name, parameter_default
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FROM information_schema.parameters JOIN information_schema.routines USING (specific_schema, specific_name)
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WHERE routine_schema = 'temp_func_test' AND routine_name ~ '^functest_is_'
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ORDER BY 1, 2;
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DROP FUNCTION functest_IS_1(int, int, text), functest_IS_2(int), functest_IS_3(int);
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-- routine usage views
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CREATE FUNCTION functest_IS_4a() RETURNS int LANGUAGE SQL AS 'SELECT 1';
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CREATE FUNCTION functest_IS_4b(x int DEFAULT functest_IS_4a()) RETURNS int LANGUAGE SQL AS 'SELECT x';
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CREATE SEQUENCE functest1;
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CREATE FUNCTION functest_IS_5(x int DEFAULT nextval('functest1'))
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RETURNS int
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LANGUAGE SQL
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AS 'SELECT x';
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CREATE FUNCTION functest_IS_6()
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RETURNS int
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LANGUAGE SQL
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RETURN nextval('functest1');
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CREATE TABLE functest2 (a int, b int);
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CREATE FUNCTION functest_IS_7()
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RETURNS int
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LANGUAGE SQL
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RETURN (SELECT count(a) FROM functest2);
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SELECT r0.routine_name, r1.routine_name
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FROM information_schema.routine_routine_usage rru
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JOIN information_schema.routines r0 ON r0.specific_name = rru.specific_name
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JOIN information_schema.routines r1 ON r1.specific_name = rru.routine_name
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WHERE r0.routine_schema = 'temp_func_test' AND
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r1.routine_schema = 'temp_func_test'
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ORDER BY 1, 2;
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SELECT routine_name, sequence_name FROM information_schema.routine_sequence_usage
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WHERE routine_schema = 'temp_func_test'
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ORDER BY 1, 2;
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SELECT routine_name, table_name, column_name FROM information_schema.routine_column_usage
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WHERE routine_schema = 'temp_func_test'
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ORDER BY 1, 2;
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SELECT routine_name, table_name FROM information_schema.routine_table_usage
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WHERE routine_schema = 'temp_func_test'
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ORDER BY 1, 2;
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DROP FUNCTION functest_IS_4a CASCADE;
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DROP SEQUENCE functest1 CASCADE;
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DROP TABLE functest2 CASCADE;
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-- overload
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CREATE FUNCTION functest_B_2(bigint) RETURNS bool LANGUAGE 'sql'
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IMMUTABLE AS 'SELECT $1 > 0';
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DROP FUNCTION functest_b_1;
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DROP FUNCTION functest_b_1; -- error, not found
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DROP FUNCTION functest_b_2; -- error, ambiguous
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-- CREATE OR REPLACE tests
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CREATE FUNCTION functest1(a int) RETURNS int LANGUAGE SQL AS 'SELECT $1';
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CREATE OR REPLACE FUNCTION functest1(a int) RETURNS int LANGUAGE SQL WINDOW AS 'SELECT $1';
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CREATE OR REPLACE PROCEDURE functest1(a int) LANGUAGE SQL AS 'SELECT $1';
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DROP FUNCTION functest1(a int);
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-- inlining of set-returning functions
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CREATE TABLE functest3 (a int);
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INSERT INTO functest3 VALUES (1), (2), (3);
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CREATE FUNCTION functest_sri1() RETURNS SETOF int
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LANGUAGE SQL
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STABLE
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AS '
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SELECT * FROM functest3;
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';
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SELECT * FROM functest_sri1();
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EXPLAIN (verbose, costs off) SELECT * FROM functest_sri1();
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CREATE FUNCTION functest_sri2() RETURNS SETOF int
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LANGUAGE SQL
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STABLE
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BEGIN ATOMIC
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SELECT * FROM functest3;
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END;
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SELECT * FROM functest_sri2();
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EXPLAIN (verbose, costs off) SELECT * FROM functest_sri2();
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DROP TABLE functest3 CASCADE;
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-- Check behavior of VOID-returning SQL functions
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CREATE FUNCTION voidtest1(a int) RETURNS VOID LANGUAGE SQL AS
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$$ SELECT a + 1 $$;
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SELECT voidtest1(42);
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CREATE FUNCTION voidtest2(a int, b int) RETURNS VOID LANGUAGE SQL AS
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$$ SELECT voidtest1(a + b) $$;
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SELECT voidtest2(11,22);
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-- currently, we can inline voidtest2 but not voidtest1
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EXPLAIN (verbose, costs off) SELECT voidtest2(11,22);
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CREATE TEMP TABLE sometable(f1 int);
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CREATE FUNCTION voidtest3(a int) RETURNS VOID LANGUAGE SQL AS
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$$ INSERT INTO sometable VALUES(a + 1) $$;
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SELECT voidtest3(17);
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CREATE FUNCTION voidtest4(a int) RETURNS VOID LANGUAGE SQL AS
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$$ INSERT INTO sometable VALUES(a - 1) RETURNING f1 $$;
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SELECT voidtest4(39);
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TABLE sometable;
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CREATE FUNCTION voidtest5(a int) RETURNS SETOF VOID LANGUAGE SQL AS
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$$ SELECT generate_series(1, a) $$ STABLE;
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SELECT * FROM voidtest5(3);
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-- Regression tests for bugs:
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-- Check that arguments that are R/W expanded datums aren't corrupted by
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-- multiple uses. This test knows that array_append() returns a R/W datum
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-- and will modify a R/W array input in-place. We use SETOF to prevent
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-- inlining of the SQL function.
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CREATE FUNCTION double_append(anyarray, anyelement) RETURNS SETOF anyarray
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LANGUAGE SQL IMMUTABLE AS
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$$ SELECT array_append($1, $2) || array_append($1, $2) $$;
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SELECT double_append(array_append(ARRAY[q1], q2), q3)
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FROM (VALUES(1,2,3), (4,5,6)) v(q1,q2,q3);
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-- Things that shouldn't work:
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CREATE FUNCTION test1 (int) RETURNS int LANGUAGE SQL
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AS 'SELECT ''not an integer'';';
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CREATE FUNCTION test1 (int) RETURNS int LANGUAGE SQL
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AS 'not even SQL';
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CREATE FUNCTION test1 (int) RETURNS int LANGUAGE SQL
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AS 'SELECT 1, 2, 3;';
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CREATE FUNCTION test1 (int) RETURNS int LANGUAGE SQL
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AS 'SELECT $2;';
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CREATE FUNCTION test1 (int) RETURNS int LANGUAGE SQL
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AS 'a', 'b';
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-- Cleanup
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DROP SCHEMA temp_func_test CASCADE;
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DROP USER regress_unpriv_user;
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RESET search_path;
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