8a0a5ec3a3
The creation of the `pg_trgm` extension needs superuser power. So,
this patch makes the extension creation in the Hydra NixOS module when
a local database is used.
If it is not possible to create this extension (remote database for
instance with nosuperuser), the creation of the `pg_trgm` index is
skipped (this index speedup queries on builds.drvpath) and warnings
are emitted:
initialising the Hydra database schema...
WARNING: Can not create extension pg_trgm: permission denied to create extension "pg_trgm"
WARNING: HINT: Temporary provide superuser role to your Hydra Postgresql user and run the script src/sql/upgrade-57.sql
WARNING: The pg_trgm index on builds.drvpath has been skipped (slower complex queries on builds.drvpath)
This allows to keep smooth migrations: the migration process doesn't
require a manual step (but this manual step is recommended on big
remote databases).
17 lines
958 B
SQL
17 lines
958 B
SQL
-- The pg_trgm extension has to be created by a superuser. The NixOS
|
|
-- module creates this extension in the systemd prestart script. We
|
|
-- then ensure the extension has been created before creating the
|
|
-- index. If it is not possible to create the extension, a warning
|
|
-- message is emitted to inform the user the index creation is skipped
|
|
-- (slower complex queries on builds.drvpath).
|
|
do $$
|
|
begin
|
|
create extension if not exists pg_trgm;
|
|
-- Provide an index used by LIKE operator on builds.drvpath (search query)
|
|
create index IndexTrgmBuildsOnDrvpath on builds using gin (drvpath gin_trgm_ops);
|
|
exception when others then
|
|
raise warning 'Can not create extension pg_trgm: %', SQLERRM;
|
|
raise warning 'HINT: Temporary provide superuser role to your Hydra Postgresql user and run the script src/sql/upgrade-57.sql';
|
|
raise warning 'The pg_trgm index on builds.drvpath has been skipped (slower complex queries on builds.drvpath)';
|
|
end$$;
|