30 lines
1.2 KiB
SQL
30 lines
1.2 KiB
SQL
-- +goose Up
|
|
-- +goose StatementBegin
|
|
-- OPERATOR NOTE: Adding a STORED generated column rewrites the entire
|
|
-- media_items table under an ACCESS EXCLUSIVE lock. On a 219K-row
|
|
-- production table this can take ~30s and blocks all reads and writes.
|
|
-- Smaller blast radius than migration 104 (which is on the 1.4M-row
|
|
-- media_files table), but still run during a maintenance window if possible.
|
|
--
|
|
-- Stored generated column matching the regex normalization currently
|
|
-- inlined in catalog/item_repo.go Search() ranking expressions.
|
|
-- Trigram-indexed so contiguous_title_match LIKE '%pattern%' uses an
|
|
-- index instead of seq-scanning the tsvector candidate set
|
|
-- (audit 2026-05-01 §3.12).
|
|
|
|
ALTER TABLE public.media_items
|
|
ADD COLUMN IF NOT EXISTS title_normalized text
|
|
GENERATED ALWAYS AS (
|
|
BTRIM(LOWER(REGEXP_REPLACE(COALESCE(title, ''), '[^[:alnum:]]+', ' ', 'g')))
|
|
) STORED;
|
|
|
|
CREATE INDEX IF NOT EXISTS idx_media_items_title_normalized_trgm
|
|
ON public.media_items USING gin (title_normalized public.gin_trgm_ops);
|
|
-- +goose StatementEnd
|
|
|
|
-- +goose Down
|
|
-- +goose StatementBegin
|
|
DROP INDEX IF EXISTS public.idx_media_items_title_normalized_trgm;
|
|
ALTER TABLE public.media_items DROP COLUMN IF EXISTS title_normalized;
|
|
-- +goose StatementEnd
|