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5b0c9d3603
a physically separate type. Defining 'lo' as a domain over OID works just fine and is more efficient. Improve documentation and fix up the test script. (Would like to turn test script into a proper regression test, but right now its output is not constant because of numeric OIDs; plus it makes Unix-specific assumptions about files it can import.)
75 lines
1.7 KiB
SQL
75 lines
1.7 KiB
SQL
--
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-- This runs some common tests against the type
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--
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-- It's used just for development
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--
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-- XXX would be nice to turn this into a proper regression test
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--
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-- Check what is in pg_largeobject
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SELECT count(DISTINCT loid) FROM pg_largeobject;
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-- ignore any errors here - simply drop the table if it already exists
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DROP TABLE a;
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-- create the test table
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CREATE TABLE a (fname name,image lo);
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-- insert a null object
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INSERT INTO a VALUES ('empty');
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-- insert a large object based on a file
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INSERT INTO a VALUES ('/etc/group', lo_import('/etc/group')::lo);
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-- now select the table
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SELECT * FROM a;
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-- check that coercion to plain oid works
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SELECT *,image::oid from a;
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-- now test the trigger
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CREATE TRIGGER t_a
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BEFORE UPDATE OR DELETE ON a
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FOR EACH ROW
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EXECUTE PROCEDURE lo_manage(image);
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-- insert
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INSERT INTO a VALUES ('aa', lo_import('/etc/hosts'));
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SELECT * FROM a
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WHERE fname LIKE 'aa%';
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-- update
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UPDATE a SET image=lo_import('/etc/group')::lo
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WHERE fname='aa';
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SELECT * FROM a
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WHERE fname LIKE 'aa%';
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-- update the 'empty' row which should be null
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UPDATE a SET image=lo_import('/etc/hosts')
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WHERE fname='empty';
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SELECT * FROM a
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WHERE fname LIKE 'empty%';
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UPDATE a SET image=null
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WHERE fname='empty';
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SELECT * FROM a
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WHERE fname LIKE 'empty%';
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-- delete the entry
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DELETE FROM a
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WHERE fname='aa';
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SELECT * FROM a
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WHERE fname LIKE 'aa%';
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-- This deletes the table contents. Note, if you comment this out, and
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-- expect the drop table to remove the objects, think again. The trigger
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-- doesn't get fired by drop table.
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DELETE FROM a;
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-- finally drop the table
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DROP TABLE a;
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-- Check what is in pg_largeobject ... if different from original, trouble
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SELECT count(DISTINCT loid) FROM pg_largeobject;
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-- end of tests
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