LemmyNet/lemmy
2
0
Fork 0
mirror of https://github.com/LemmyNet/lemmy.git synced 2024-11-29 07:41:20 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

try to fix combined_transition_tables

Browse source
This commit is contained in:
dullbananas 2023-12-30 11:00:30 -07:00 committed by GitHub
parent 0844a7612a
commit 8d1c633378
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 27 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

34
replaceable_schema.sql
View file

@ -55,22 +55,14 @@ CREATE PROCEDURE r.create_triggers (table_name text, command text)
LANGUAGE plpgsql
AS $a$
DECLARE
-- `PERFORM` isn't used because it doesn't allow `WITH`
defs text := $b$
-- Delete
CREATE FUNCTION r.thing_delete_statement ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
DECLARE
foo int;
BEGIN
WITH combined_transition_tables AS (
select_old_table
),
trigger_result AS command
SELECT
1 INTO foo;
delete_command;
RETURN NULL;
END $$;
CREATE TRIGGER delete_statement
@ -82,15 +74,8 @@ END $$;
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
DECLARE
foo int;
BEGIN
WITH combined_transition_tables AS (
select_new_table
),
trigger_result AS command
SELECT
1 INTO foo;
insert_command;
RETURN NULL;
END $$;
CREATE TRIGGER insert_statement
@ -102,16 +87,8 @@ END $$;
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
DECLARE
foo int;
BEGIN
WITH combined_transition_tables AS (
select_old_table
UNION ALL select_new_table
),
trigger_result AS command
SELECT
1 INTO foo;
update_command;
RETURN NULL;
END $$;
CREATE TRIGGER update_statement
@ -120,6 +97,10 @@ END $$;
EXECUTE FUNCTION r.thing_update_statement ( );
$b$;
BEGIN
-- Couldn't get `combined_transition_tables` to work using CTE
defs := replace(defs, 'delete_command', replace(command, 'combined_transition_tables', '(select_old_table) AS combined_transition_tables'));
defs := replace(defs, 'insert_command', replace(command, 'combined_transition_tables', '(select_new_table) AS combined_transition_tables'));
defs := replace(defs, 'update_command', replace(command, 'combined_transition_tables', '(select_old_table UNION ALL select_new_table) AS combined_transition_tables'));
defs := replace(defs, 'select_old_table', $$
SELECT
-1 AS count_diff, old_table::thing AS thing FROM old_table $$);
@ -127,7 +108,6 @@ END $$;
SELECT
1 AS count_diff, new_table::thing AS thing FROM new_table $$);
defs := replace(defs, 'thing', table_name);
defs := replace(defs, 'command', format('(%s)', command));
EXECUTE defs;
END
$a$;