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- Join Operations 11812
- 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
...putes the optimal join order exactly using a dynamic programming algorithm. As the number of tables in a join grows, exact enumeration becomes expensive, so for large joins the optimizer switches to an approximate (greedy) algorithm. The approximate_join_or...ptimization time for large joins. Even below the threshold, the optimizer falls back to the approximate algorithm if exact enumeration exceeds its internal budget.... - https://man.mtool.work/duckdb/2.0/guides/performance/join_operations.html
- Troubleshooting Quack 8687
- DuckDB 2.0 ships a polished version of Quack (first released in DuckDB 1.5.3) with substantial performance and stability improvements. If you experience any issues with Quack, try upgrading all your DuckDB clients to the latest version of t
...mote (TOKEN 'example-token'); FROM remote.local_data; Eager resolution adds metadata-loading work and can increase catalog enumeration time for large catalogs. It does not fix unrelated binding errors or failures to load Iceberg metadata. Resolving only som... - https://man.mtool.work/duckdb/2.0/quack/troubleshooting.html
- Iceberg Options 7385
- This page lists the options of the iceberg extension: the parameters accepted by the Iceberg functions , the options of the ATTACH and CREATE SECRET statements used to connect to a catalog , and the global settings. ATTACH Options To make a
.... With eager , schemas are resolved while tables are enumerated, which adds metadata-loading work and can increase catalog enumeration time for large catalogs. Eager resolution is needed when a Quack client attaches a server whose catalog still has unresolv... - https://man.mtool.work/duckdb/2.0/core_extensions/iceberg/iceberg_options.html
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