49 lines
1.3 KiB
MySQL
49 lines
1.3 KiB
MySQL
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-- +goose Up
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-- +goose StatementBegin
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-- add the precomputed column
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ALTER TABLE documents ADD COLUMN content_tsv tsvector;
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-- populate the new column with the initial data
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UPDATE documents SET content_tsv = to_tsvector('german', content);
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-- Step 3: Create a trigger function to update the tsvector column upon insert or update
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CREATE OR REPLACE FUNCTION update_tsvector()
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RETURNS TRIGGER AS $$
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BEGIN
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NEW.content_tsv := to_tsvector('german', NEW.content);
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RETURN NEW;
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END;
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$$ LANGUAGE plpgsql;
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-- create the trigger on the documents table
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CREATE TRIGGER documents_tsvector_update
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BEFORE INSERT OR UPDATE ON documents
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FOR EACH ROW EXECUTE FUNCTION update_tsvector();
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-- create an index on the precomputed column for faster searches
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CREATE INDEX idx_fts_documents ON documents USING GIN(content_tsv);
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-- +goose StatementEnd
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-- +goose Down
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-- +goose StatementBegin
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-- drop the trigger that updates the tsvector column
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DROP TRIGGER IF EXISTS documents_tsvector_update ON documents;
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-- Step 2: Drop the trigger function
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DROP FUNCTION IF EXISTS update_tsvector();
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-- Step 3: Drop the tsvector column
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ALTER TABLE documents DROP COLUMN IF EXISTS content_tsv;
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-- Step 4: Drop the index on the tsvector column
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DROP INDEX IF EXISTS idx_fts_documents;
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-- +goose StatementEnd
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