MySQLERRORNotableHIGH confidence

Hypergraph optimizer failed to rewrite the query

Disable the hypergraph optimizer: Falls back to the classic optimizer which can handle the full range of query shapes.

Simplify the query to reduce complexity: Breaking complex queries into smaller steps may allow the hypergraph optimizer to process them.

Production Risk

Medium — The query fails; the optimizer must be switched to proceed.

Why it happens

1The query structure is too complex or contains constructs the hypergraph optimizer cannot rewrite.
2An internal error occurred in the hypergraph optimizer rewriting phase.

Fix 1

Disable the hypergraph optimizer

SET SESSION optimizer_switch='hypergraph_optimizer=off';

Why this works

Falls back to the classic optimizer which can handle the full range of query shapes.

Fix 2

Simplify the query to reduce complexity

Why this works

Breaking complex queries into smaller steps may allow the hypergraph optimizer to process them.

What not to do

Sources

MySQL 8.0 — 4139 ER_HYPERGRAPH_QUERY_REWRITE_FAILED

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At a glance

PlatformMySQL Error Numbers

Code4139

SeverityERROR

TierNotable

ConfidenceHIGH