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132 lines
4.4 KiB
PL/PgSQL
132 lines
4.4 KiB
PL/PgSQL
--
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-- First, create a slave database and define the functions and test data
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-- therein.
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--
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-- This initial hackery is to allow successive runs without failures.
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--
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CREATE OR REPLACE FUNCTION conditional_drop() RETURNS text AS '
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DECLARE
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dbname text;
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BEGIN
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SELECT INTO dbname datname FROM pg_database WHERE datname = ''regression_slave'';
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IF FOUND THEN
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DROP DATABASE regression_slave;
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END IF;
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RETURN ''OK'';
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END;
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' LANGUAGE 'plpgsql';
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SELECT conditional_drop();
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CREATE DATABASE regression_slave;
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\connect regression_slave
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-- Turn off echoing so that expected file does not depend on
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-- contents of dblink.sql.
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\set ECHO none
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\i dblink.sql
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\set ECHO all
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create table foo(f1 int, f2 text, f3 text[], primary key (f1,f2));
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insert into foo values(0,'a','{"a0","b0","c0"}');
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insert into foo values(1,'b','{"a1","b1","c1"}');
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insert into foo values(2,'c','{"a2","b2","c2"}');
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insert into foo values(3,'d','{"a3","b3","c3"}');
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insert into foo values(4,'e','{"a4","b4","c4"}');
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insert into foo values(5,'f','{"a5","b5","c5"}');
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insert into foo values(6,'g','{"a6","b6","c6"}');
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insert into foo values(7,'h','{"a7","b7","c7"}');
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insert into foo values(8,'i','{"a8","b8","c8"}');
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insert into foo values(9,'j','{"a9","b9","c9"}');
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-- misc utilities
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-- show the currently executing query
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select 'hello' as hello, dblink_current_query() as query;
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-- list the primary key fields
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select * from dblink_get_pkey('foo');
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-- build an insert statement based on a local tuple,
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-- replacing the primary key values with new ones
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select dblink_build_sql_insert('foo','1 2',2,'{"0", "a"}','{"99", "xyz"}');
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-- build an update statement based on a local tuple,
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-- replacing the primary key values with new ones
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select dblink_build_sql_update('foo','1 2',2,'{"0", "a"}','{"99", "xyz"}');
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-- build a delete statement based on a local tuple,
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select dblink_build_sql_delete('foo','1 2',2,'{"0", "a"}');
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--
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-- Connect back to the regression database and define the functions.
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-- Turn off echoing so that expected file does not depend on
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-- contents of dblink.sql.
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--
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\connect regression
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\set ECHO none
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\i dblink.sql
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\set ECHO all
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-- regular old dblink
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select * from dblink('dbname=regression_slave','select * from foo') as t(a int, b text, c text[]) where t.a > 7;
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-- should generate "no connection available" error
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select * from dblink('select * from foo') as t(a int, b text, c text[]) where t.a > 7;
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-- create a persistent connection
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select dblink_connect('dbname=regression_slave');
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-- use the persistent connection
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select * from dblink('select * from foo') as t(a int, b text, c text[]) where t.a > 7;
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-- open a cursor
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select dblink_open('rmt_foo_cursor','select * from foo');
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-- fetch some data
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select * from dblink_fetch('rmt_foo_cursor',4) as t(a int, b text, c text[]);
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select * from dblink_fetch('rmt_foo_cursor',4) as t(a int, b text, c text[]);
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-- this one only finds two rows left
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select * from dblink_fetch('rmt_foo_cursor',4) as t(a int, b text, c text[]);
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-- close the cursor
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select dblink_close('rmt_foo_cursor');
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-- should generate "cursor rmt_foo_cursor does not exist" error
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select * from dblink_fetch('rmt_foo_cursor',4) as t(a int, b text, c text[]);
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-- close the persistent connection
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select dblink_disconnect();
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-- should generate "no connection available" error
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select * from dblink('select * from foo') as t(a int, b text, c text[]) where t.a > 7;
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-- put more data into our slave table, first using arbitrary connection syntax
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-- but truncate the actual return value so we can use diff to check for success
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select substr(dblink_exec('dbname=regression_slave','insert into foo values(10,''k'',''{"a10","b10","c10"}'')'),1,6);
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-- create a persistent connection
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select dblink_connect('dbname=regression_slave');
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-- put more data into our slave table, using persistent connection syntax
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-- but truncate the actual return value so we can use diff to check for success
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select substr(dblink_exec('insert into foo values(11,''l'',''{"a11","b11","c11"}'')'),1,6);
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-- let's see it
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select * from dblink('select * from foo') as t(a int, b text, c text[]);
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-- change some data
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select dblink_exec('update foo set f3[2] = ''b99'' where f1 = 11');
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-- let's see it
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select * from dblink('select * from foo') as t(a int, b text, c text[]) where a = 11;
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-- delete some data
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select dblink_exec('delete from foo where f1 = 11');
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-- let's see it
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select * from dblink('select * from foo') as t(a int, b text, c text[]) where a = 11;
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-- close the persistent connection
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select dblink_disconnect();
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