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- Command Line 11816
- Unexpected Markdown Output When Piping If the output of the command line client is piped to another process and an AI agent environment variable (such as AI_AGENT ) is set, the CLI switches to agent mode and prints compact Markdown tables i
... - https://man.mtool.work/duckdb/2.0/guides/troubleshooting/command_line.html
- Join Operations 9671
- 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
...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_order_threshold setting controls when this happens: joins with... - https://man.mtool.work/duckdb/2.0/guides/performance/join_operations.html
- PEG Parser 8802
- New Starting with DuckDB 2.0, the PEG parser is the default parser. In earlier versions it was an experimental, opt-in feature enabled with enable_peg_parser() , which is no longer required or available. DuckDB uses a parser based on PEG (
...acy PostgreSQL-style parser through the legacy_parser extension . Setting the following option autoloads the extension and switches from the default PEG parser to the legacy parser: SET enable_legacy_parser = true; The legacy parser is intended as a brid... - https://man.mtool.work/duckdb/2.0/sql/peg_parser.html
- Configuration 6657
- DuckDB has a number of configuration options that can be used to change the behavior of the system. The configuration options can be set using either the SET statement or the PRAGMA statement . They can be reset to their original values usi
...here are more than 64 cores. VARCHAR auto pivot_filter_threshold The threshold determining when a dedicated pivot operator switches from using filtered aggregates to LIST. UBIGINT 20 pivot_limit The maximum number of pivot columns in a pivot statement. U... - https://man.mtool.work/duckdb/2.0/configuration/overview.html
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