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- Overview 12260
- The pages in this section are intended for developers who contribute to DuckDB or build extensions for it. If you would like to contribute, please also read the contributing guidelines . Project Structure and Processes DuckDB Repositories l
...rs explains what internal errors are and how to debug them. Performance Profiling shows how to use DuckDB's built-in query profiler. Metrics lists the metrics collected by the profiler. Benchmark Suite describes how to run DuckDB's benchmarks to detect p... - https://man.mtool.work/duckdb/2.0/dev/overview.html
- Pragmas 9190
- The PRAGMA statement is a SQL extension adopted by DuckDB from SQLite. PRAGMA statements can be issued in a similar manner to regular SQL statements. PRAGMA commands may alter the internal state of the database engine, and can influence the
...profiling; PRAGMA enable_profile; Profiling Coverage By default, the profiling coverage is set to SELECT . SELECT runs the profiler for each operator in the physical plan of a SELECT statement. SET profiling_coverage = 'SELECT'; By default, the profiler...does not emit profiling information for other statement types ( INSERT INTO , ATTACH , etc.). To run the profiler for all statement types, change this setting to ALL . SET profiling_coverage = 'ALL'; Profiling Format The format of enabl... - https://man.mtool.work/duckdb/2.0/configuration/pragmas.html
- Configuration 8044
- 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
...diates (sorts, hash tables) per connection (e.g., 256MB). VARCHAR NULL profile_output , profiling_output The file to which profiler output is written. When empty, the output is printed to the terminal. VARCHAR profiling_coverage The profiling coverage, e...ALL (all queries are profiled). VARCHAR SELECT profiling_renderer_settings A map of settings passed to the renderer of the profiler output, e.g., {'max_extra_lines': 100}. Settings not recognized by the active renderer are ignored. MAP(VARCHAR, VARCHAR)... - https://man.mtool.work/duckdb/2.0/configuration/overview.html
- DuckDB_% Metadata Functions 7470
- DuckDB offers a collection of table functions that provide metadata about the current database. These functions reside in the main schema and their names are prefixed with duckdb_ . The resultset returned by a duckdb_ table function may be
...ction was introduced in DuckDB 2.0. The duckdb_available_metrics() function lists the metrics that can be collected by the profiler , e.g., using the tracked_metrics setting. Column Description Type metric_name The name of the metric, e.g., query.cpu_tim... - https://man.mtool.work/duckdb/2.0/sql/meta/duckdb_table_functions.html
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