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The relation creation is done at executor startup, however the main regression test suite is lacking scenarios where no data is inserted which is something that can happen when using EXECUTE or EXPLAIN with CREATE TABLE AS and WITH NO DATA. Some patches are worked on to reshape the way CTAS relations are created, so this makes sure that we do not miss some query patterns already supported. Reported-by: Andreas Karlsson Author: Michael Paquier Reviewed-by: Andreas Karlsson Discussion: https://postgr.es/m/20190206091817.GB14980@paquier.xyz
188 lines
12 KiB
Plaintext
188 lines
12 KiB
Plaintext
-- Regression tests for prepareable statements. We query the content
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-- of the pg_prepared_statements view as prepared statements are
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-- created and removed.
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SELECT name, statement, parameter_types FROM pg_prepared_statements;
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name | statement | parameter_types
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------+-----------+-----------------
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(0 rows)
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PREPARE q1 AS SELECT 1 AS a;
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EXECUTE q1;
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a
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---
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1
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(1 row)
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SELECT name, statement, parameter_types FROM pg_prepared_statements;
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name | statement | parameter_types
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------+------------------------------+-----------------
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q1 | PREPARE q1 AS SELECT 1 AS a; | {}
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(1 row)
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-- should fail
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PREPARE q1 AS SELECT 2;
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ERROR: prepared statement "q1" already exists
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-- should succeed
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DEALLOCATE q1;
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PREPARE q1 AS SELECT 2;
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EXECUTE q1;
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?column?
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----------
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2
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(1 row)
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PREPARE q2 AS SELECT 2 AS b;
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SELECT name, statement, parameter_types FROM pg_prepared_statements;
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name | statement | parameter_types
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------+------------------------------+-----------------
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q1 | PREPARE q1 AS SELECT 2; | {}
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q2 | PREPARE q2 AS SELECT 2 AS b; | {}
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(2 rows)
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-- sql92 syntax
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DEALLOCATE PREPARE q1;
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SELECT name, statement, parameter_types FROM pg_prepared_statements;
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name | statement | parameter_types
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------+------------------------------+-----------------
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q2 | PREPARE q2 AS SELECT 2 AS b; | {}
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(1 row)
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DEALLOCATE PREPARE q2;
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-- the view should return the empty set again
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SELECT name, statement, parameter_types FROM pg_prepared_statements;
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name | statement | parameter_types
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------+-----------+-----------------
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(0 rows)
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-- parameterized queries
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PREPARE q2(text) AS
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SELECT datname, datistemplate, datallowconn
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FROM pg_database WHERE datname = $1;
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EXECUTE q2('postgres');
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datname | datistemplate | datallowconn
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----------+---------------+--------------
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postgres | f | t
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(1 row)
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PREPARE q3(text, int, float, boolean, smallint) AS
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SELECT * FROM tenk1 WHERE string4 = $1 AND (four = $2 OR
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ten = $3::bigint OR true = $4 OR odd = $5::int)
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ORDER BY unique1;
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EXECUTE q3('AAAAxx', 5::smallint, 10.5::float, false, 4::bigint);
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unique1 | unique2 | two | four | ten | twenty | hundred | thousand | twothousand | fivethous | tenthous | odd | even | stringu1 | stringu2 | string4
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---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+---------
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2 | 2716 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 5 | CAAAAA | MAEAAA | AAAAxx
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102 | 612 | 0 | 2 | 2 | 2 | 2 | 102 | 102 | 102 | 102 | 4 | 5 | YDAAAA | OXAAAA | AAAAxx
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802 | 2908 | 0 | 2 | 2 | 2 | 2 | 802 | 802 | 802 | 802 | 4 | 5 | WEAAAA | WHEAAA | AAAAxx
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902 | 1104 | 0 | 2 | 2 | 2 | 2 | 902 | 902 | 902 | 902 | 4 | 5 | SIAAAA | MQBAAA | AAAAxx
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1002 | 2580 | 0 | 2 | 2 | 2 | 2 | 2 | 1002 | 1002 | 1002 | 4 | 5 | OMAAAA | GVDAAA | AAAAxx
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1602 | 8148 | 0 | 2 | 2 | 2 | 2 | 602 | 1602 | 1602 | 1602 | 4 | 5 | QJAAAA | KBMAAA | AAAAxx
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1702 | 7940 | 0 | 2 | 2 | 2 | 2 | 702 | 1702 | 1702 | 1702 | 4 | 5 | MNAAAA | KTLAAA | AAAAxx
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2102 | 6184 | 0 | 2 | 2 | 2 | 2 | 102 | 102 | 2102 | 2102 | 4 | 5 | WCAAAA | WDJAAA | AAAAxx
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2202 | 8028 | 0 | 2 | 2 | 2 | 2 | 202 | 202 | 2202 | 2202 | 4 | 5 | SGAAAA | UWLAAA | AAAAxx
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2302 | 7112 | 0 | 2 | 2 | 2 | 2 | 302 | 302 | 2302 | 2302 | 4 | 5 | OKAAAA | ONKAAA | AAAAxx
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2902 | 6816 | 0 | 2 | 2 | 2 | 2 | 902 | 902 | 2902 | 2902 | 4 | 5 | QHAAAA | ECKAAA | AAAAxx
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3202 | 7128 | 0 | 2 | 2 | 2 | 2 | 202 | 1202 | 3202 | 3202 | 4 | 5 | ETAAAA | EOKAAA | AAAAxx
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3902 | 9224 | 0 | 2 | 2 | 2 | 2 | 902 | 1902 | 3902 | 3902 | 4 | 5 | CUAAAA | UQNAAA | AAAAxx
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4102 | 7676 | 0 | 2 | 2 | 2 | 2 | 102 | 102 | 4102 | 4102 | 4 | 5 | UBAAAA | GJLAAA | AAAAxx
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4202 | 6628 | 0 | 2 | 2 | 2 | 2 | 202 | 202 | 4202 | 4202 | 4 | 5 | QFAAAA | YUJAAA | AAAAxx
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4502 | 412 | 0 | 2 | 2 | 2 | 2 | 502 | 502 | 4502 | 4502 | 4 | 5 | ERAAAA | WPAAAA | AAAAxx
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4702 | 2520 | 0 | 2 | 2 | 2 | 2 | 702 | 702 | 4702 | 4702 | 4 | 5 | WYAAAA | YSDAAA | AAAAxx
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4902 | 1600 | 0 | 2 | 2 | 2 | 2 | 902 | 902 | 4902 | 4902 | 4 | 5 | OGAAAA | OJCAAA | AAAAxx
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5602 | 8796 | 0 | 2 | 2 | 2 | 2 | 602 | 1602 | 602 | 5602 | 4 | 5 | MHAAAA | IANAAA | AAAAxx
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6002 | 8932 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 1002 | 6002 | 4 | 5 | WWAAAA | OFNAAA | AAAAxx
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6402 | 3808 | 0 | 2 | 2 | 2 | 2 | 402 | 402 | 1402 | 6402 | 4 | 5 | GMAAAA | MQFAAA | AAAAxx
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7602 | 1040 | 0 | 2 | 2 | 2 | 2 | 602 | 1602 | 2602 | 7602 | 4 | 5 | KGAAAA | AOBAAA | AAAAxx
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7802 | 7508 | 0 | 2 | 2 | 2 | 2 | 802 | 1802 | 2802 | 7802 | 4 | 5 | COAAAA | UCLAAA | AAAAxx
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8002 | 9980 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 3002 | 8002 | 4 | 5 | UVAAAA | WTOAAA | AAAAxx
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8302 | 7800 | 0 | 2 | 2 | 2 | 2 | 302 | 302 | 3302 | 8302 | 4 | 5 | IHAAAA | AOLAAA | AAAAxx
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8402 | 5708 | 0 | 2 | 2 | 2 | 2 | 402 | 402 | 3402 | 8402 | 4 | 5 | ELAAAA | OLIAAA | AAAAxx
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8602 | 5440 | 0 | 2 | 2 | 2 | 2 | 602 | 602 | 3602 | 8602 | 4 | 5 | WSAAAA | GBIAAA | AAAAxx
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9502 | 1812 | 0 | 2 | 2 | 2 | 2 | 502 | 1502 | 4502 | 9502 | 4 | 5 | MBAAAA | SRCAAA | AAAAxx
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9602 | 9972 | 0 | 2 | 2 | 2 | 2 | 602 | 1602 | 4602 | 9602 | 4 | 5 | IFAAAA | OTOAAA | AAAAxx
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(29 rows)
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-- too few params
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EXECUTE q3('bool');
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ERROR: wrong number of parameters for prepared statement "q3"
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DETAIL: Expected 5 parameters but got 1.
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-- too many params
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EXECUTE q3('bytea', 5::smallint, 10.5::float, false, 4::bigint, true);
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ERROR: wrong number of parameters for prepared statement "q3"
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DETAIL: Expected 5 parameters but got 6.
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-- wrong param types
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EXECUTE q3(5::smallint, 10.5::float, false, 4::bigint, 'bytea');
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ERROR: parameter $3 of type boolean cannot be coerced to the expected type double precision
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HINT: You will need to rewrite or cast the expression.
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-- invalid type
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PREPARE q4(nonexistenttype) AS SELECT $1;
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ERROR: type "nonexistenttype" does not exist
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LINE 1: PREPARE q4(nonexistenttype) AS SELECT $1;
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^
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-- create table as execute
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PREPARE q5(int, text) AS
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SELECT * FROM tenk1 WHERE unique1 = $1 OR stringu1 = $2
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ORDER BY unique1;
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CREATE TEMPORARY TABLE q5_prep_results AS EXECUTE q5(200, 'DTAAAA');
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SELECT * FROM q5_prep_results;
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unique1 | unique2 | two | four | ten | twenty | hundred | thousand | twothousand | fivethous | tenthous | odd | even | stringu1 | stringu2 | string4
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---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+---------
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200 | 9441 | 0 | 0 | 0 | 0 | 0 | 200 | 200 | 200 | 200 | 0 | 1 | SHAAAA | DZNAAA | HHHHxx
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497 | 9092 | 1 | 1 | 7 | 17 | 97 | 497 | 497 | 497 | 497 | 194 | 195 | DTAAAA | SLNAAA | AAAAxx
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1173 | 6699 | 1 | 1 | 3 | 13 | 73 | 173 | 1173 | 1173 | 1173 | 146 | 147 | DTAAAA | RXJAAA | VVVVxx
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1849 | 8143 | 1 | 1 | 9 | 9 | 49 | 849 | 1849 | 1849 | 1849 | 98 | 99 | DTAAAA | FBMAAA | VVVVxx
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2525 | 64 | 1 | 1 | 5 | 5 | 25 | 525 | 525 | 2525 | 2525 | 50 | 51 | DTAAAA | MCAAAA | AAAAxx
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3201 | 7309 | 1 | 1 | 1 | 1 | 1 | 201 | 1201 | 3201 | 3201 | 2 | 3 | DTAAAA | DVKAAA | HHHHxx
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3877 | 4060 | 1 | 1 | 7 | 17 | 77 | 877 | 1877 | 3877 | 3877 | 154 | 155 | DTAAAA | EAGAAA | AAAAxx
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4553 | 4113 | 1 | 1 | 3 | 13 | 53 | 553 | 553 | 4553 | 4553 | 106 | 107 | DTAAAA | FCGAAA | HHHHxx
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5229 | 6407 | 1 | 1 | 9 | 9 | 29 | 229 | 1229 | 229 | 5229 | 58 | 59 | DTAAAA | LMJAAA | VVVVxx
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5905 | 9537 | 1 | 1 | 5 | 5 | 5 | 905 | 1905 | 905 | 5905 | 10 | 11 | DTAAAA | VCOAAA | HHHHxx
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6581 | 4686 | 1 | 1 | 1 | 1 | 81 | 581 | 581 | 1581 | 6581 | 162 | 163 | DTAAAA | GYGAAA | OOOOxx
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7257 | 1895 | 1 | 1 | 7 | 17 | 57 | 257 | 1257 | 2257 | 7257 | 114 | 115 | DTAAAA | XUCAAA | VVVVxx
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7933 | 4514 | 1 | 1 | 3 | 13 | 33 | 933 | 1933 | 2933 | 7933 | 66 | 67 | DTAAAA | QRGAAA | OOOOxx
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8609 | 5918 | 1 | 1 | 9 | 9 | 9 | 609 | 609 | 3609 | 8609 | 18 | 19 | DTAAAA | QTIAAA | OOOOxx
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9285 | 8469 | 1 | 1 | 5 | 5 | 85 | 285 | 1285 | 4285 | 9285 | 170 | 171 | DTAAAA | TNMAAA | HHHHxx
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9961 | 2058 | 1 | 1 | 1 | 1 | 61 | 961 | 1961 | 4961 | 9961 | 122 | 123 | DTAAAA | EBDAAA | OOOOxx
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(16 rows)
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CREATE TEMPORARY TABLE q5_prep_nodata AS EXECUTE q5(200, 'DTAAAA')
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WITH NO DATA;
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SELECT * FROM q5_prep_nodata;
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unique1 | unique2 | two | four | ten | twenty | hundred | thousand | twothousand | fivethous | tenthous | odd | even | stringu1 | stringu2 | string4
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---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+---------
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(0 rows)
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-- unknown or unspecified parameter types: should succeed
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PREPARE q6 AS
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SELECT * FROM tenk1 WHERE unique1 = $1 AND stringu1 = $2;
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PREPARE q7(unknown) AS
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SELECT * FROM road WHERE thepath = $1;
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SELECT name, statement, parameter_types FROM pg_prepared_statements
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ORDER BY name;
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name | statement | parameter_types
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------+------------------------------------------------------------------+----------------------------------------------------
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q2 | PREPARE q2(text) AS +| {text}
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| SELECT datname, datistemplate, datallowconn +|
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| FROM pg_database WHERE datname = $1; |
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q3 | PREPARE q3(text, int, float, boolean, smallint) AS +| {text,integer,"double precision",boolean,smallint}
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| SELECT * FROM tenk1 WHERE string4 = $1 AND (four = $2 OR+|
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| ten = $3::bigint OR true = $4 OR odd = $5::int) +|
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| ORDER BY unique1; |
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q5 | PREPARE q5(int, text) AS +| {integer,text}
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| SELECT * FROM tenk1 WHERE unique1 = $1 OR stringu1 = $2 +|
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| ORDER BY unique1; |
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q6 | PREPARE q6 AS +| {integer,name}
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| SELECT * FROM tenk1 WHERE unique1 = $1 AND stringu1 = $2; |
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q7 | PREPARE q7(unknown) AS +| {path}
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| SELECT * FROM road WHERE thepath = $1; |
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(5 rows)
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-- test DEALLOCATE ALL;
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DEALLOCATE ALL;
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SELECT name, statement, parameter_types FROM pg_prepared_statements
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ORDER BY name;
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name | statement | parameter_types
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------+-----------+-----------------
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(0 rows)
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