Error 1923: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'.
| Error Code | SQLSTATE | Error | Description |
|---|---|---|---|
| 1923 | ER_ILLEGAL_SUBQUERY_OPTIMIZER_SWITCHES | At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. |
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