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sql-statement-create-binding: add note about truncation #21825

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sql-statement-create-binding: add note about truncation
dveeden Sep 23, 2025
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Update sql-statements/sql-statement-create-binding.md
dveeden Sep 23, 2025
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Update sql-statements/sql-statement-create-binding.md
dveeden Sep 24, 2025
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minor wording updates
qiancai Sep 25, 2025
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Expand Up @@ -311,6 +311,10 @@ Empty set (0.002 sec)
1 row in set (0.002 sec)
```

## SQL statement truncation

When you use `CREATE BINDING ... FROM HISTORY USING PLAN DIGEST`, the binding can fail if the SQL statement stored in [statement summary tables](/statement-summary-tables.md) for that digest is truncated because it is longer than [`tidb_stmt_summary_max_sql_length`](/system-variables.md#tidb_stmt_summary_max_sql_length-new-in-v40). In this case, you need to increase `tidb_stmt_summary_max_sql_length`.

## MySQL compatibility

This statement is a TiDB extension to MySQL syntax.
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