EC
3148
MySQLERRORNotableQueryMEDIUM confidence

Too many values in table-level lookup

Production Risk

Medium — query fails; application must be refactored to use temporary tables or batching.

What this means

An internal table-level lookup operation encountered more values than the maximum allowed, preventing the query from proceeding.

Why it happens
  1. 1An IN() list or lookup table contains more values than the internal limit.
  2. 2A table value constructor has too many rows.
How to reproduce
trigger — this will error
trigger — this will error
SELECT * FROM t1 WHERE id IN (/* thousands of values */);

expected output

ERROR 3148 (HY000): Too many values in table lookup.

Fix

Use a temporary table for large IN() lists

Use a temporary table for large IN() lists
CREATE TEMPORARY TABLE tmp_ids (id INT);
INSERT INTO tmp_ids VALUES (1),(2),... ;
SELECT * FROM t1 JOIN tmp_ids USING (id);

Why this works

JOIN against a temporary table is more efficient and has no row count limit.

What not to do

✕

Sources
Official documentation ↗

MySQL 8.0 — 3148 ER_TOO_MANY_VALUES_IN_TABLE_LOOKUP

Content generated with AI assistance and reviewed for accuracy. Found an error? hello@errcodes.dev

← All MySQL errors