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|
\set MYSQL_HOST `echo \'"$MYSQL_HOST"\'`
\set MYSQL_PORT `echo \'"$MYSQL_PORT"\'`
\set MYSQL_USER_NAME `echo \'"$MYSQL_USER_NAME"\'`
\set MYSQL_PASS `echo \'"$MYSQL_PWD"\'`
-- Before running this file User must create database mysql_fdw_regress on
-- mysql with all permission for MYSQL_USER_NAME user with MYSQL_PWD password
-- and ran mysql_init.sh file to create tables.
\c contrib_regression
CREATE EXTENSION IF NOT EXISTS mysql_fdw;
CREATE SERVER mysql_svr FOREIGN DATA WRAPPER mysql_fdw
OPTIONS (host :MYSQL_HOST, port :MYSQL_PORT);
CREATE USER MAPPING FOR public SERVER mysql_svr
OPTIONS (username :MYSQL_USER_NAME, password :MYSQL_PASS);
-- Create foreign table
CREATE FOREIGN TABLE f_test_tbl2 (c1 INTEGER, c2 VARCHAR(14), c3 VARCHAR(13))
SERVER mysql_svr OPTIONS (dbname 'mysql_fdw_regress', table_name 'test_tbl2');
INSERT INTO f_test_tbl2 VALUES(10, 'DEVELOPMENT', 'PUNE');
INSERT INTO f_test_tbl2 VALUES(20, 'ADMINISTRATION', 'BANGLORE');
INSERT INTO f_test_tbl2 VALUES(30, 'SALES', 'MUMBAI');
INSERT INTO f_test_tbl2 VALUES(40, 'HR', 'NAGPUR');
INSERT INTO f_test_tbl2 VALUES(50, 'IT', 'PUNE');
INSERT INTO f_test_tbl2 VALUES(60, 'DB SERVER', 'PUNE');
SELECT * FROM f_test_tbl2 ORDER BY 1;
c1 | c2 | c3
----+----------------+----------
10 | DEVELOPMENT | PUNE
20 | ADMINISTRATION | BANGLORE
30 | SALES | MUMBAI
40 | HR | NAGPUR
50 | IT | PUNE
60 | DB SERVER | PUNE
(6 rows)
-- LIMIT/OFFSET pushdown.
-- Limit with Offset should get pushdown.
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT 3 OFFSET 2;
QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.f_test_tbl2
Output: c1, c2, c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC LIMIT 3 OFFSET 2
(3 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT 3 OFFSET 2;
c1 | c2 | c3
----+-------+--------
30 | SALES | MUMBAI
40 | HR | NAGPUR
50 | IT | PUNE
(3 rows)
-- Only Limit should get pushdown.
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT 3;
QUERY PLAN
----------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.f_test_tbl2
Output: c1, c2, c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC LIMIT 3
(3 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT 3;
c1 | c2 | c3
----+----------------+----------
10 | DEVELOPMENT | PUNE
20 | ADMINISTRATION | BANGLORE
30 | SALES | MUMBAI
(3 rows)
-- Expression in Limit clause.
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT round(3.2) OFFSET 2;
QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.f_test_tbl2
Output: c1, c2, c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC LIMIT 3 OFFSET 2
(3 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT round(3.2) OFFSET 2;
c1 | c2 | c3
----+-------+--------
30 | SALES | MUMBAI
40 | HR | NAGPUR
50 | IT | PUNE
(3 rows)
-- Only Offset without Limit should not get pushdown.
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 OFFSET 2;
QUERY PLAN
--------------------------------------------------------------------------------------------------------------------
Limit
Output: c1, c2, c3
-> Foreign Scan on public.f_test_tbl2
Output: c1, c2, c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC
(5 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 OFFSET 2;
c1 | c2 | c3
----+-----------+--------
30 | SALES | MUMBAI
40 | HR | NAGPUR
50 | IT | PUNE
60 | DB SERVER | PUNE
(4 rows)
-- Limit ALL
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT ALL;
QUERY PLAN
--------------------------------------------------------------------------------------------------------------
Foreign Scan on public.f_test_tbl2
Output: c1, c2, c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC
(3 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT ALL;
c1 | c2 | c3
----+----------------+----------
10 | DEVELOPMENT | PUNE
20 | ADMINISTRATION | BANGLORE
30 | SALES | MUMBAI
40 | HR | NAGPUR
50 | IT | PUNE
60 | DB SERVER | PUNE
(6 rows)
-- Limit NULL
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT NULL;
QUERY PLAN
--------------------------------------------------------------------------------------------------------------
Foreign Scan on public.f_test_tbl2
Output: c1, c2, c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC
(3 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT NULL;
c1 | c2 | c3
----+----------------+----------
10 | DEVELOPMENT | PUNE
20 | ADMINISTRATION | BANGLORE
30 | SALES | MUMBAI
40 | HR | NAGPUR
50 | IT | PUNE
60 | DB SERVER | PUNE
(6 rows)
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT NULL OFFSET 2;
QUERY PLAN
--------------------------------------------------------------------------------------------------------------------
Limit
Output: c1, c2, c3
-> Foreign Scan on public.f_test_tbl2
Output: c1, c2, c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC
(5 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT NULL OFFSET 2;
c1 | c2 | c3
----+-----------+--------
30 | SALES | MUMBAI
40 | HR | NAGPUR
50 | IT | PUNE
60 | DB SERVER | PUNE
(4 rows)
-- Limit 0 and Offset 0
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT 0;
QUERY PLAN
----------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.f_test_tbl2
Output: c1, c2, c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC LIMIT 0
(3 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT 0;
c1 | c2 | c3
----+----+----
(0 rows)
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT 0 OFFSET 0;
QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.f_test_tbl2
Output: c1, c2, c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC LIMIT 0 OFFSET 0
(3 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT 0 OFFSET 0;
c1 | c2 | c3
----+----+----
(0 rows)
-- Offset NULL.
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT 3 OFFSET NULL;
QUERY PLAN
----------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.f_test_tbl2
Output: c1, c2, c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC LIMIT 3
(3 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT 3 OFFSET NULL;
c1 | c2 | c3
----+----------------+----------
10 | DEVELOPMENT | PUNE
20 | ADMINISTRATION | BANGLORE
30 | SALES | MUMBAI
(3 rows)
-- Limit with placeholder.
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT (SELECT COUNT(*) FROM f_test_tbl2);
QUERY PLAN
----------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.f_test_tbl2
Output: f_test_tbl2.c1, f_test_tbl2.c2, f_test_tbl2.c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC LIMIT ?
InitPlan 1 (returns $0)
-> Foreign Scan
Output: (count(*))
Relations: Aggregate on (mysql_fdw_regress.f_test_tbl2)
Remote query: SELECT count(*) FROM `mysql_fdw_regress`.`test_tbl2`
(8 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT (SELECT COUNT(*) FROM f_test_tbl2);
c1 | c2 | c3
----+----------------+----------
10 | DEVELOPMENT | PUNE
20 | ADMINISTRATION | BANGLORE
30 | SALES | MUMBAI
40 | HR | NAGPUR
50 | IT | PUNE
60 | DB SERVER | PUNE
(6 rows)
-- Limit with expression, should not pushdown.
EXPLAIN (VERBOSE, COSTS FALSE)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT (10 - (SELECT COUNT(*) FROM f_test_tbl2));
QUERY PLAN
--------------------------------------------------------------------------------------------------------------------
Limit
Output: f_test_tbl2.c1, f_test_tbl2.c2, f_test_tbl2.c3
InitPlan 1 (returns $0)
-> Foreign Scan
Output: (count(*))
Relations: Aggregate on (mysql_fdw_regress.f_test_tbl2)
Remote query: SELECT count(*) FROM `mysql_fdw_regress`.`test_tbl2`
-> Foreign Scan on public.f_test_tbl2
Output: f_test_tbl2.c1, f_test_tbl2.c2, f_test_tbl2.c3
Remote query: SELECT `c1`, `c2`, `c3` FROM `mysql_fdw_regress`.`test_tbl2` ORDER BY `c1` IS NULL, `c1` ASC
(10 rows)
SELECT * FROM f_test_tbl2 ORDER BY 1 LIMIT (10 - (SELECT COUNT(*) FROM f_test_tbl2));
c1 | c2 | c3
----+----------------+----------
10 | DEVELOPMENT | PUNE
20 | ADMINISTRATION | BANGLORE
30 | SALES | MUMBAI
40 | HR | NAGPUR
(4 rows)
DELETE FROM f_test_tbl2;
DROP FOREIGN TABLE f_test_tbl2;
DROP USER MAPPING FOR public SERVER mysql_svr;
DROP SERVER mysql_svr;
DROP EXTENSION mysql_fdw;
|
