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Join Operations

duckdb.org

How to Force a Join Order DuckDB has a cost-based query optimizer, which uses statistics in the base tables (stored in a DuckDB database or Parquet files) to estimate the cardinality of operations. Turn off the Join Order Optimizer To turn off the join order optimizer, set the following PRAGMAs: SET disabled_optimizers = 'join_order,build_side_probe_side'; This disables both the join order optimizer and left/right s…

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