codeintel: Add missing foreign key indexes (!24969) · Merge requests · Administrator / sourcegraph

Administrator requested to merge ef/fk-indexes into main Sep 14, 2021

Created by: efritz

On a foreign key from TA(x) -> TB(y), Postgres will create an index on TB(y) but not on TA(x) automatically. I think a lot of developers assume both directions are indexed.

This change massively increases the speed of the UpdateNumDependencyReferences query, which is the currently dominating factor of LSIF upload processing.

Note: I have created two indexes in Cloud that need to be removed after merging this PR (eftemp1 and eftemp2 on the lsif_packages and lsif_references tables).

codeintel: Add missing foreign key indexes

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