sql

MySQL index key too long

MySQL.*Error 1071.*Specified key was too long.*max key length is 3072 bytes

Fixes

1.Use prefix index: CREATE INDEX idx ON table(col(191))
2.Reduce column size or use utf8mb3 instead of utf8mb4
3.Use innodb_large_prefix=ON with ROW_FORMAT=DYNAMIC

mysqlindexkey-length

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