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41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
exports.config = {
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// CREATE INDEX CONCURRENTLY can't be run inside a transaction
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// If this migration fails in the middle, indexes and constraints will have
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// to be cleaned up manually.
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transaction: false,
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}
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exports.up = async function (knex) {
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await knex.raw(`
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ALTER TABLE chunks
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ADD CONSTRAINT chunks_start_version_non_negative
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CHECK (start_version IS NOT NULL AND start_version >= 0)
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NOT VALID
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`)
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await knex.raw(`
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ALTER TABLE chunks
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VALIDATE CONSTRAINT chunks_start_version_non_negative
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`)
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await knex.raw(`
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CREATE UNIQUE INDEX CONCURRENTLY index_chunks_on_doc_id_and_start_version
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ON chunks (doc_id, start_version)
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`)
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await knex.raw(`
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ALTER TABLE chunks
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ADD UNIQUE USING INDEX index_chunks_on_doc_id_and_start_version
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`)
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}
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exports.down = async function (knex) {
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await knex.raw(`
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ALTER TABLE chunks
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DROP CONSTRAINT IF EXISTS index_chunks_on_doc_id_and_start_version
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`)
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await knex.raw(`
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DROP INDEX IF EXISTS index_chunks_on_doc_id_and_start_version
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`)
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await knex.raw(`
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ALTER TABLE chunks
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DROP CONSTRAINT IF EXISTS chunks_start_version_non_negative
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`)
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}
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