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- Startup & Shutdown – DuckDB 14397
- This page is for DuckDB 1.3, which is outdated.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
...} // run queries... // cleanup duckdb_disconnect ( & con ); duckdb_close ( & db ); API Reference Overview duckdb_instance_cache duckdb_create_instance_cache (); duckdb_state duckdb_get_or_create_from_cache ( duckdb_instance_cache instance_cache , con...st char * path , duckdb_database * out_database , duckdb_config config , char ** out_error ); void duckdb_destroy_instance_cache ( duckdb_instance_cache * instance_cache ); duckdb_state duckdb_open ( const char * path , duckdb_database * out_database...alue duckdb_get_table_names ( duckdb_connection connection , const char * query , bool qualified ); duckdb_create_instance_cache Creates a new database instance cache. The instance cache is necessary if a client/program (re)opens multiple databases to... - https://man.mtool.work/duckdb/1.3/clients/c/connect.html
- Complete API – DuckDB 9586
- This page is for DuckDB 1.3, which is outdated.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
...v1.0 stable API, which contains methods that are available long-term. API Reference Overview Open Connect duckdb_instance_cache duckdb_create_instance_cache (); duckdb_state duckdb_get_or_create_from_cache ( duckdb_instance_cache instance_cache , con...st char * path , duckdb_database * out_database , duckdb_config config , char ** out_error ); void duckdb_destroy_instance_cache ( duckdb_instance_cache * instance_cache ); duckdb_state duckdb_open ( const char * path , duckdb_database * out_database...nction cast_function ); void duckdb_destroy_cast_function ( duckdb_cast_function * cast_function ); duckdb_create_instance_cache Creates a new database instance cache. The instance cache is necessary if a client/program (re)opens multiple databases to... - https://man.mtool.work/duckdb/1.3/clients/c/api.html
- Configuration – DuckDB 8843
- This page is for DuckDB 1.3, which is outdated.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
...., loading/installing modules, COPY TO/FROM, CSV readers, pandas replacement scans, etc) BOOLEAN true enable_external_file_cache Allow the database to cache external files (e.g., Parquet) in memory. BOOLEAN true enable_fsst_vectors Allow scans on FSST...decode/encode geometry data in/as GeoParquet files if the spatial extension is present. BOOLEAN true enable_http_metadata_cache Whether or not the global http metadata is used to cache HTTP metadata BOOLEAN false enable_logging Enables the logger BOO...encies Enable created MACROs to create dependencies on the referenced objects (such as tables) BOOLEAN false enable_object_cache [PLACEHOLDER] Legacy setting - does nothing BOOLEAN NULL enable_server_cert_verification Enable server side certificate ve... - https://man.mtool.work/duckdb/1.3/configuration/overview.html
- PostgreSQL Extension – DuckDB 8843
- This page is for DuckDB 1.3, which is outdated. Switch to the current documentation . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Ove
...fault pg_array_as_varchar Read PostgreSQL arrays as varchar - enables reading mixed dimensional arrays false pg_connection_cache Whether or not to use the connection cache true pg_connection_limit The maximum amount of concurrent PostgreSQL connection...e them with the given character NULL pg_use_ctid_scan Whether or not to parallelize scanning using table ctids true Schema Cache To avoid having to continuously fetch schema data from PostgreSQL, DuckDB keeps schema information – such as the names of...tables, their columns, etc. – cached. If changes are made to the schema through a different connection to the PostgreSQL instance, such as new columns being a... - https://man.mtool.work/duckdb/1.3/core_extensions/postgres.html
- Node.js Client (Neo) – DuckDB 8525
- 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
...configuration options : const instance = await DuckDBInstance . create ( ' my_duckdb.db ' , { threads : ' 4 ' }); Instance Cache Multiple instances in the same process should not attach the same database. To prevent this, an instance cache can be used...: const instance = await DuckDBInstance . fromCache ( ' my_duckdb.db ' ); This uses the default instance cache. For advanced usage, you can create instance caches explicitly:...import { DuckDBInstanceCache } from ' @duckdb/node-api ' ; const cache = new DuckDBInstanceCache (); const instance = await cache . getOrCreateInstance... - https://man.mtool.work/duckdb/1.3/clients/node_neo/overview.html
- MySQL Extension – DuckDB 8419
- 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
...urrently experimental) false mysql_tinyint1_as_boolean Whether or not to convert TINYINT(1) columns to BOOLEAN true Schema Cache To avoid having to continuously fetch schema data from MySQL, DuckDB keeps schema information – such as the names of table...s, their columns, etc. – cached. If changes are made to the schema through a different connection to the MySQL instance, such as new columns being added...to a table, the cached schema information might be outdated. In this case, the function mysql_clear_cache can be executed to clear the internal... - https://man.mtool.work/duckdb/1.3/core_extensions/mysql.html
- Pragmas – DuckDB 8207
- 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
...ans: PRAGMA verify_serializer ; Disable verification of round-trip capabilities: PRAGMA disable_verify_serializer ; Object Cache Enable caching of objects for e.g., Parquet metadata: PRAGMA enable_object_cache ; Disable caching of objects: PRAGMA disa...ble_object_cache ; Checkpointing Compression During checkpointing, the existing column data + any new changes get compressed. There exist a...ut Profiling Mode Custom Metrics Disable Profiling Query Optimization Logging Full-Text Search Indexes Verification Object Cache Checkpointing Temp Directory for Spilling Data to Disk Returning Errors as JSON IEEE Floating-Point Operation Semantics Qu... - https://man.mtool.work/duckdb/1.3/configuration/pragmas.html
- Tuning Workloads – DuckDB 8207
- 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
...ent is prepared, it completes several of the initial portions of the query execution process (parsing, planning, etc.) and caches their output. When it is executed, those steps can be skipped, improving performance. This is beneficial mostly for repea...les. Caching Starting with version 1.3.0, DuckDB supports caching remote data. To inspect the content of the external file cache, run: FROM duckdb_external_file_cache (); Best Practices for Using Connections DuckDB will perform best when reusing the s...necting on every query will incur some overhead, which can reduce performance when running many small queries. DuckDB also caches some data and metadata in memory, and that cache is lost when the last open connection is closed. Frequently, a single co... - https://man.mtool.work/duckdb/1.3/guides/performance/how_to_tune_workloads.html
- Appender – DuckDB 8047
- 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
...d < int32_t > ( 2 ); appender . Append < string > ( "Hannes" ); appender . EndRow (); Any values added to the Appender are cached prior to being inserted into the database system for performance reasons. That means that, while appending, the rows migh...t not be immediately visible in the system. The cache is automatically flushed when the Appender goes out of scope or when appender.Close() is called. The cache can also be man... - https://man.mtool.work/duckdb/1.3/data/appender.html
- Debugging – DuckDB 7729
- 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
...mand. cat test.list test/sql/join/full_outer/test_full_outer_join_issue_4252.test test/sql/join/full_outer/full_outer_join_cache.test test/sql/join/full_outer/test_full_outer_join.test To run only the tests labeled in the file: build/debug/test/unitte... - https://man.mtool.work/duckdb/1.3/dev/sqllogictest/debugging.html
DuckDB 1.3 Documentation / man.mtool.work