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- Information Schema – DuckDB 16369
- This page is for DuckDB 1.3, which is outdated.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
.... Tables character_sets : Character Sets Column Description Type Example character_set_catalog Currently not implemented – always NULL . VARCHAR NULL character_set_schema Currently not implemented – always NULL . VARCHAR NULL character_set_name Name of...me as the database encoding. VARCHAR 'UTF8' default_collate_catalog Name of the database containing the default collation (always the current database). VARCHAR 'my_db' default_collate_schema Name of the schema containing the default collation. VARCHAR...ase and has the following layout: Column Description Type Example table_catalog Name of the database containing the table (always the current database). VARCHAR 'my_db' table_schema Name of the schema containing the table. VARCHAR 'main' table_name Nam... - https://man.mtool.work/duckdb/1.3/sql/meta/information_schema.html
- Union Type – DuckDB 11035
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...alternative” values, much like the union in C. The main difference being that these UNION types are tagged unions and thus always carry a discriminator “tag” which signals which alternative it is currently holding, even if the inner value itself is nul...ore similar to C++17's std::variant , Rust's Enum or the “sum type” present in most functional languages. UNION types must always have at least one member, and while they can contain multiple members of the same type, the tag names must be unique. UNIO...esponding VARCHAR casts. Since everything can be cast to VARCHAR , this is “safe” in a sense. Casting to Unions A type can always be implicitly cast to a UNION if it can be implicitly cast to one of the UNION member types. If there are multiple candida... - https://man.mtool.work/duckdb/1.3/sql/data_types/union.html
- DuckDB_% Metadata Functions – DuckDB 10918
- This page is for DuckDB 1.3, which is outdated.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
...the column datatype. VARCHAR data_type_id The internal identifier of the column data type. BIGINT character_maximum_length Always NULL . DuckDB text types do not enforce a value length restriction based on a length type parameter. INTEGER numeric_preci...cies() function provides metadata about the dependencies available in the DuckDB instance. Column Description Type classid Always 0 BIGINT objid The internal id of the object. BIGINT objsubid Always 0 INTEGER refclassid Always 0 BIGINT refobjid The int...ernal id of the dependent object. BIGINT refobjsubid Always 0 INTEGER deptype The type of dependency. Either regular (n) or automatic (a). VARCHAR duckdb_extensions The duckdb_extens... - https://man.mtool.work/duckdb/1.3/sql/meta/duckdb_table_functions.html
- Spatial Functions – DuckDB 8501
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...the same units as the spatial reference system of the geometry. The POINT_2D and LINESTRING_2D overloads of this function always return 0.0 but are included for completeness. Example select ST_Area ( 'POLYGON((0 0, 0 1, 1 1, 1 0, 0 0))' :: geometry );...ontainsProperly , this function will also return true if geom2 is contained strictly on the boundary of geom1 . A geometry always ST_Contains itself, but does not ST_ContainsProperly itself. ST_ContainsProperly Signature BOOLEAN ST_ContainsProperly ( g...t to ST_Contains , this function does not return true if geom2 is contained strictly on the boundary of geom1 . A geometry always ST_Contains itself, but does not ST_ContainsProperly itself. ST_ConvexHull Signature GEOMETRY ST_ConvexHull ( geom GEOMETR... - https://man.mtool.work/duckdb/1.3/core_extensions/spatial/functions.html
- Interval Type – DuckDB 8118
- 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
...nits. It then extracts the aforementioned six parts from period , adds them back together, and confirms that the result is always equal to the original period . SELECT period = list_reduce ( [ INTERVAL ( datepart ( part , period ) || part ) FOR part IN...[ 'year' , 'month' , 'day' , 'hour' , 'minute' , 'microsecond' ] ], ( i1 , i2 ) -> i1 + i2 ) -- always true FROM ( VALUES ( INTERVAL ( random () * 123_456_789_123 ) MICROSECONDS + INTERVAL ( random () * 12_345 ) DAYS + INTERV...As a result, INTERVAL s can compare equal even when they are functionally different, and the ordering of INTERVAL s is not always preserved when they are added to dates or timestamps. For example: INTERVAL 30 DAYS = INTERVAL 1 MONTH but DATE '2020-01-0... - https://man.mtool.work/duckdb/1.3/sql/data_types/interval.html
- Typecasting – DuckDB 8118
- 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 nested type constructors ( list_value / [...] / MAP ). Casting Operations Matrix Values of a particular data type cannot always be cast to any arbitrary target data type. The only exception is the NULL value – which can always be converted between ty...ad of throwing an error. Varchar The VARCHAR type acts as a univeral target: any arbitrary value of any arbitrary type can always be cast to the VARCHAR type. This type is also used for displaying values in the shell. SELECT CAST ( 42.5 AS VARCHAR ); C... - https://man.mtool.work/duckdb/1.3/sql/data_types/typecasting.html
- Logical Operators – DuckDB 8000
- 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
...NOT . SQL uses a three-valuad logic system with true , false and NULL . Note that logical operators involving NULL do not always evaluate to NULL . For example, NULL AND false will evaluate to false , and NULL OR true will evaluate to true . Below are...logical Documentation Expressions Copy Markdown Logical following available uses three valuad logic system Note involving always example Below complete truth tables Binary 関連するページ Expressions Comparisons Boolean Type Relational API on Pandas Tu... - https://man.mtool.work/duckdb/1.3/sql/expressions/logical_operators.html
- Complete API – DuckDB 7735
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...ailing to call duckdb_close (in case of e.g., a program crash) will not cause data corruption. Still, it is recommended to always correctly close a database object after you are done with it. Syntax void duckdb_close ( duckdb_database * database ); Par...the DuckDB instance through duckdb_open_ext . The duckdb_config must be destroyed using 'duckdb_destroy_config' This will always succeed unless there is a malloc failure. Note that duckdb_destroy_config should always be called on the resulting config,...re Create a prepared statement object from a query. Note that after calling duckdb_prepare , the prepared statement should always be destroyed using duckdb_destroy_prepare , even if the prepare fails. If the prepare fails, duckdb_prepare_error can be c... - https://man.mtool.work/duckdb/1.3/clients/c/api.html
- Securing Extensions – DuckDB 7735
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...known_extensions = false ; To lock this configuration, use the lock_configuration option : SET lock_configuration = true ; Always Require Signed Extensions By default, DuckDB requires extensions to be either signed as core extensions (created by the Du...Overview of Security Levels for Extensions Community Extensions Disabling Autoinstalling and Autoloading Known Extensions Always Require Signed Extensions... - https://man.mtool.work/duckdb/1.3/operations_manual/securing_duckdb/securing_ext...
- Configuration – DuckDB 7617
- 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
...the DuckDB instance through duckdb_open_ext . The duckdb_config must be destroyed using 'duckdb_destroy_config' This will always succeed unless there is a malloc failure. Note that duckdb_destroy_config should always be called on the resulting config,... - https://man.mtool.work/duckdb/1.3/clients/c/config.html
DuckDB 1.3 Documentation / man.mtool.work