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Update settings.md
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@ -1170,6 +1170,10 @@ Data in the VALUES clause of INSERT queries is processed by a separate stream pa
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Default value: 262144 (= 256 KiB).
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:::note
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`max_query_size` cannot be set within an SQL query (e.g., `SELECT now() SETTINGS max_query_size=10000`) because ClickHouse needs to allocate a buffer to parse the query, and this buffer size is determined by the `max_query_size` setting, which must be configured before the query is executed.
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:::
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## max_parser_depth {#max_parser_depth}
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Limits maximum recursion depth in the recursive descent parser. Allows controlling the stack size.
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