Results of 1 - 10 of about 24 for tree (0.002 sec.)
- R-Tree Indexes 15462
- The spatial extension provides support for spatial indexing through the R-tree extension index type. Why Should I Use an R-Tree Index? When working with geospatial datasets, it is very common that you want to filter rows based on their spat
...e datasets as it always requires a full table scan to check every row in the table. However, by indexing a table with an R-tree, it is possible to accelerate these types of queries significantly. How Do R-Tree Indexes Work? An R-tree is a balanced tr...otated – the sides are always parallel to the coordinate axes. The MBR of a point is the point itself. By traversing the R-tree from top to bottom, it is possible to very quickly search a R-tree-indexed table for only those rows where the indexed geo...metry column intersect a specific region of interest, as you can skip searching entire sub-trees if the bounding rectangles of their parent nodes don't intersect the query region at all. Once the leaf nodes are reached... - https://man.mtool.work/duckdb/2.0/core_extensions/spatial/r-tree_indexes.html
- Overview of DuckDB Internals 10125
- Tip For a detailed explanation of DuckDB internals, see the Design and Implementation of DuckDB Internals ("DiDi") library entry. On this page is a brief description of the internals of the DuckDB engine. Parser The parser converts a query
...anner The logical planner creates LogicalOperator nodes from the bound statements. In this phase, the actual logical query tree is created. Optimizer After the logical planner has created the logical query tree, the optimizers are run over that query...tree to create an optimized query plan. The following query optimizers are run: Expression Rewriter : Simplifies expressions, p...ing Filter Pushdown : Pushes filters down into the query plan and duplicates filters over equivalency sets. Also prunes subtrees that are guaranteed to be empty (because of filters that statically evaluate to false). Join Order Optimizer : Reorders j... - https://man.mtool.work/duckdb/2.0/internals/overview.html
- Versioning of Extensions 9958
- Extension Versioning Most software has some sort of version number. Version numbers serve a few important goals: Tie a binary to a specific state of the source code Allow determining the expected feature set Allow determining the state of t
...s as GitHub releases, an example of which you can see in the delta extension . Finally, there is a small exception: All in-tree extensions simply follow DuckDB's release cycle. Installing a Specific Extension Version To install a specific version of...version of DuckDB is released. However, note that DuckDB provides an extension template that makes this fairly simple. In-Tree vs. Out-of-Tree Originally, DuckDB extensions lived exclusively in the DuckDB main repository, github.com/duckdb/duckdb ....These extensions are called in-tree. Later, the concept of out-of-tree extensions was added, where extensions were separated into their own repository, which... - https://man.mtool.work/duckdb/2.0/extensions/versioning_of_extensions.html
- Pragmas 9107
- 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
...ET explain_output = 'all'; Profiling Enable Profiling The following query enables profiling with the default format, query_tree . Independent of the format, enable_profiling is mandatory to enable profiling. PRAGMA enable_profiling; PRAGMA enable_pro...setting to ALL . SET profiling_coverage = 'ALL'; Profiling Format The format of enable_profiling can be specified as query_tree , json , query_tree_optimizer , or no_output . Each 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'; Alt... - https://man.mtool.work/duckdb/2.0/configuration/pragmas.html
- Profiling 9107
- Profiling is essential to help understand why certain queries exhibit specific performance characteristics. DuckDB contains several built-in features to enable query profiling, which this page covers. For a high-level example of using EXPLA
...iz – produces a DOT output, which can be rendered with Graphviz html – produces an HTML output, which can be rendered with treeflex json – produces a JSON output mermaid – produces a Mermaid flowchart web – opens the query graph in a web browser (com...section of the pragmas page. Setting Description Default Options enable_profiling , enable_profile Turn on profiling query_tree query_tree , json , query_tree_optimizer , no_output profiling_coverage Set the operators to profile SELECT SELECT , ALL p...HAR File path for profiling output coverage VARCHAR Query coverage: 'select' or 'all' format VARCHAR Output format: 'query_tree' , 'json' , 'query_tree_optimizer' , 'no_output' All parameters are optional and named. You can also pass metrics as an un... - https://man.mtool.work/duckdb/2.0/dev/profiling.html
- Release Cycle 8406
- This document outlines the DuckDB and core extension release cycle framework. It is intended for developers working on DuckDB extensions to better understand the underlying processes. Overview DuckDB follows Semantic Versioning ( v<MAJOR>.<
...extension targeting the stable C API of DuckDB. These extensions are binary-compatible across multiple DuckDB versions In-tree extensions : Extensions that live inside the duckdb/duckdb source tree Main Branches and Tags In git-based version control...e different groups, as extensions share the same release cycle based on which of these three categories they belong to. In-tree extensions Unstable API extensions Stable API extensions We will now go over the release cycles of the three different cat...egories, in order of increasing complexity. In-Tree Extensions For in-tree extensions , the release cycle is very simple. Since their code lives in the duckdb/duckdb reposito... - https://man.mtool.work/duckdb/2.0/dev/release_cycle.html
- Profile and Monitor 8090
- Overview The Go client can observe query execution: it can retrieve per-operator profiling metrics after a query runs, and register a log storage that receives DuckDB's log messages. Both are described below. Profiling Profiling information
...Context(context.Background(), `PRAGMA disable_profiling`) check(err) GetProfilingInfo() returns a duckdb.ProfilingInfo , a tree that mirrors DuckDB's query plan. Each node has a Metrics map of metric name to value and a Children slice of child nodes....metrics include type and timing , followed by one node per metric group, e.g., the query group with total_time . Walk the tree to read them: for _, child := range info.Children { if opType, ok := child.Metrics["type"]; ok { log.Printf("operator: %s,... - https://man.mtool.work/duckdb/2.0/clients/go/profiling.html
- Indexes 7989
- Index Types DuckDB has two built-in index types. Indexes can also be defined via extensions . Min-Max Index (Zonemap) A min-max index (also known as zonemap or block range index) is automatically created for columns of all general-purpose d
...ata types . Adaptive Radix Tree (ART) An Adaptive Radix Tree (ART) is mainly used to ensure primary key constraints and to speed up point and very highly...ing ART indexes if the index does not fit in memory during index creation. Indexes Defined by Extensions DuckDB supports R-trees for spatial indexing via the spatial extension. Persistence Both min-max indexes and ART indexes are persisted on disk. C... - https://man.mtool.work/duckdb/2.0/sql/indexes.html
- Profiling Queries 7873
- DuckDB supports profiling queries via the EXPLAIN and EXPLAIN ANALYZE statements. EXPLAIN To see the query plan of a query without executing it, run: EXPLAIN ⟨query⟩; The output of EXPLAIN contains the estimated cardinalities for each opera
...DuckDB 2.0, EXPLAIN (SQL) renders the optimized logical plan back as an executable DuckDB SQL string instead of as a plan tree: sql EXPLAIN (SQL) SELECT 1 + 2 AS answer; explain_key explain_value sql SELECT CAST(3 AS INTEGER) AS answer Because the o... - https://man.mtool.work/duckdb/2.0/sql/statements/profiling.html
- Profile and Monitor 7823
- Overview The JDBC driver exposes several ways to observe a running or completed query: cancelling and timing out queries, polling query progress, retrieving profiling output, and emitting memory-usage events through Java Flight Recorder . T
...bling profiling with SET enable_profiling . The ProfilerPrintFormat enum selects the output format: DEFAULT , TEXT , QUERY_TREE , QUERY_TREE_OPTIMIZER , NO_OUTPUT , JSON , HTML , GRAPHVIZ , YAML , and MERMAID . try (DuckDBConnection conn = (DuckDBCon... - https://man.mtool.work/duckdb/2.0/clients/java/profiling.html
DuckDB 2.0 Documentation / man.mtool.work