Results of 1 - 10 of about 13 for physical (0.003 sec.)
- Profiling – DuckDB 13425
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...extra set of metrics are enabled, which are only available in the QUERY_ROOT node. These include OPTIMIZER , PLANNER , and PHYSICAL_PLANNER metrics. They are measured in seconds and returned as a double . It is possible to toggle each of these additional...he time to generate the logical plan from the parsed SQL nodes. PLANNER_BINDING : The time taken to bind the logical plan. Physical Planner Metrics The physical planner is responsible for generating the physical plan from the logical plan. The following...are the metrics supported in the physical planner: PHYSICAL_PLANNER : The time spent generating the physical plan. PHYSICAL_PLANNER_COLUMN_BINDING : The time spent... - https://man.mtool.work/duckdb/1.3/dev/profiling.html
- EXPLAIN: Inspect Query Plans – DuckDB 11964
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...s / Meta Queries Copy Markdown EXPLAIN: Inspect Query Plans EXPLAIN SELECT * FROM tbl ; The EXPLAIN statement displays the physical plan, i.e., the query plan that will get executed, and is enabled by prepending the query with EXPLAIN . The physical plan...is a tree of operators that are executed in a specific order to produce the result of the query. To generate an efficient physical plan, the query optimizer transforms the existing physical plan into a better physical plan. To demonstrate, see the below...udents JOIN exams USING ( sid ) WHERE name LIKE 'Ma%' ; ┌─────────────────────────────┐ │┌───────────────────────────┐│ ││ Physical Plan ││ │└───────────────────────────┘│ └─────────────────────────────┘ ┌───────────────────────────┐ │ PROJECTION │ │ ─ ─... - https://man.mtool.work/duckdb/1.3/guides/meta/explain.html
- Overview of DuckDB Internals – DuckDB 9079
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...ferenceExpression nodes that refer to a specific index into the DataChunks that are passed around in the execution engine. Physical Plan Generator The physical plan generator converts the resulting logical operator tree into a PhysicalOperator tree. Exec...ution In the execution phase, the physical operators are executed to produce the query result. DuckDB uses a push-based vectorized model, where DataChunks are pushed...article Parser ParsedExpression TableRef QueryNode SQL Statement Binder Logical Planner Optimizer Column Binding Resolver Physical Plan Generator Execution... - https://man.mtool.work/duckdb/1.3/internals/overview.html
- Caveats – DuckDB 8868
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..., it uses logical content comparison. The following query returns true for all fields: SELECT a != b , -- Space is part of physical JSON content. Despite equal logical content, values are treated as not equal. c != d , -- Same. c [ 0 ] = d [ 0 ], -- Equa...lity because space was removed from physical content of fields: a = c [ 0 ], -- Indeed, field is equal to empty list without space... b != c [ 0 ], -- ... but differen...0]) (b != c[0]) true true true true true 関連キーワード content comparison equal space Equality based cases logical fields physical empty list Documentation Import Files Copy Markdown Caveats Comparison Warning Currently equality files differ context 関連... - https://man.mtool.work/duckdb/1.3/data/json/caveats.html
- Pragmas – DuckDB 8709
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...ress_bar ; Or: PRAGMA disable_print_progress_bar ; EXPLAIN Output The output of EXPLAIN can be configured to show only the physical plan. The default configuration of EXPLAIN : SET explain_output = 'physical_only' ; To only show the optimized query plan:...ach format prints its output to the configured output, except no_output . The default format is query_tree . It prints the physical query plan and the metrics of each operator in the tree. SET enable_profiling = 'query_tree' ; Alternatively, json returns...the physical query plan as JSON: SET enable_profiling = 'json' ; Tip To visualize query plans, consider using the DuckDB execution plan... - https://man.mtool.work/duckdb/1.3/configuration/pragmas.html
- Configuration – DuckDB 8129
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...b.type_name extension name. BOOLEAN false arrow_output_list_view Whether export to Arrow format should use ListView as the physical layout for LIST columns BOOLEAN false autoinstall_extension_repository Overrides the custom endpoint for extension install...uctured JSON instead of as a raw string BOOLEAN false explain_output Output of EXPLAIN statements ( ALL , OPTIMIZED_ONLY , PHYSICAL_ONLY ) VARCHAR physical_only file_search_path A comma separated list of directories to search for input files VARCHAR home... - https://man.mtool.work/duckdb/1.3/configuration/overview.html
- Execution Format – DuckDB 8129
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...e in-memory data during execution. DataChunk is a collection of Vectors, used for instance to represent a column list in a PhysicalProjection operator. Data Flow DuckDB uses a vectorized query execution model. All operators in DuckDB are optimized to wor...le type. DuckDB supports different vector formats , which allow the system to store the same logical data with a different physical representation . This allows for a more compressed representation, and potentially allows for compressed execution through...out the system. Below the list of supported vector formats is shown. Flat Vectors Flat vectors are physically stored as a contiguous array, this is the standard uncompressed vector format. For flat vectors the logical and physical... - https://man.mtool.work/duckdb/1.3/internals/vector.html
- Known Python Issues – DuckDB 7759
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...───┼───────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤ │ physical_plan │ ┌───────────────────────────┐\n│ PROJECTION │\n│ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ │\n│ x … │ └───────────────┴────────────────... - https://man.mtool.work/duckdb/1.3/clients/python/known_issues.html
- Result Verification – DuckDB 7689
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...query II EXPLAIN SELECT tbl.a FROM 'data/parquet-testing/arrow/alltypes_plain.parquet' tbl ( a ) WHERE a = 1 OR a = 2 ---- physical_plan < REGEX > :. * PARQUET_SCAN . * Filters : a = 1 OR a = 2 . * If we instead want the result not to contain a snippet o... - https://man.mtool.work/duckdb/1.3/dev/sqllogictest/result_verification.html
- Tuning Workloads – DuckDB 7689
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...ng If your queries are not performing as well as expected, it's worth studying their query plans: Use EXPLAIN to print the physical query plan without running the query. Use EXPLAIN ANALYZE to run and profile the query. This will show the CPU time that e... - https://man.mtool.work/duckdb/1.3/guides/performance/how_to_tune_workloads.html
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