sql

Index exists but not being used

Index.*not used|index.*ignored|full table scan

Fixes

1.Check if a function wraps the indexed column (kills index usage)
2.Verify data types match — implicit casting prevents index use
3.Update table statistics: ANALYZE/UPDATE STATISTICS
4.Check if the optimizer estimates a full scan is cheaper (small table)

indexoptimizerperformance

Related Errors

PostgreSQL JSONB extracting from scalar

ERROR:.*cannot extract elements from a scalar.*jsonb

•Check value is an object/array before extraction: jsonb_typeof(col) = 'object'
•Use COALESCE with '{}' for null/scalar values

PostgreSQL JSONB operator type mismatch

ERROR:.*operator does not exist.*jsonb @> text

•Cast the right operand to jsonb: col @> '{"key": "val"}'::jsonb
•Use ->> operator for text extraction instead of ->

PostgreSQL full-text search config not found

ERROR:.*text search configuration.*does not exist

•Create the text search configuration or use a built-in one (english, simple)
•Install the pg_catalog extension if using a custom configuration