v.24.3Improvement
Add max_parser_backtracks setting to limit query parsing complexity
Add a new setting max_parser_backtracks which allows to limit the complexity of query parsing. #61502 (Alexey Milovidov).Why it matters
This setting is added to control and restrict the number of parser backtracks, preventing excessive resource consumption and improving query parsing reliability by limiting potential parsing complexity.How to use it
Users can enable or adjust this feature by setting themax_parser_backtracks parameter in their ClickHouse server configuration or query settings to define the maximum allowed backtracks during query parsing.