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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
80 lines
2.2 KiB
SQL
80 lines
2.2 KiB
SQL
-- 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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PREPARE q1 AS SELECT 1 AS a;
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EXECUTE q1;
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SELECT name, statement, parameter_types FROM pg_prepared_statements;
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-- should fail
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PREPARE q1 AS SELECT 2;
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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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PREPARE q2 AS SELECT 2 AS b;
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SELECT name, statement, parameter_types FROM pg_prepared_statements;
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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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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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-- 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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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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-- too few params
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EXECUTE q3('bool');
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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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-- wrong param types
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EXECUTE q3(5::smallint, 10.5::float, false, 4::bigint, 'bytea');
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-- invalid type
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PREPARE q4(nonexistenttype) AS SELECT $1;
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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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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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-- 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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-- 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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