sql
MySQL lock wait timeout during DDL or DML
ERROR 1205.*Lock wait timeout exceeded
Fixes
- 1.Find the blocking transaction: SELECT * FROM information_schema.INNODB_LOCK_WAITS
- 2.Kill the blocking connection if it's idle: KILL <blocking_trx_id>
- 3.Use pt-online-schema-change for DDL on large tables to avoid long locks
mysqllockstimeoutDDL
Related Errors
sql3 fixes
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
sql3 fixes
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 ->
sql3 fixes
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