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- Vectors – DuckDB 12192
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...the entire column – and so only needs to be constructed once. Structs Structs are nested types that contain any number of child types. Think of them like a struct in C. The way to access struct data using vectors is to access the child vectors recurs...ively using the duckdb_struct_vector_get_child method. The struct vector itself does not have any data (i.e., you should not use duckdb_vector_get_data method on the str...uct). However , the struct vector itself does have a validity mask. The reason for this is that the child elements of a struct can be NULL , but the struct itself can also be NULL . Lists Lists are nested types that contain a si... - https://man.mtool.work/duckdb/1.3/clients/c/vector.html
- Complete API – DuckDB 10941
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...duckdb_value duckdb_create_null_value (); idx_t duckdb_get_list_size ( duckdb_value value ); duckdb_value duckdb_get_list_child ( duckdb_value value , idx_t index ); duckdb_value duckdb_create_enum_value ( duckdb_logical_type type , uint64_t value );...uint64_t duckdb_get_enum_value ( duckdb_value value ); duckdb_value duckdb_get_struct_child ( duckdb_value value , idx_t index ); char * duckdb_value_to_string ( duckdb_value value ); Logical Type Interface duckdb_...pe ); char * duckdb_enum_dictionary_value ( duckdb_logical_type type , idx_t index ); duckdb_logical_type duckdb_list_type_child_type ( duckdb_logical_type type ); duckdb_logical_type duckdb_array_type_child_type ( duckdb_logical_type type ); idx_t du... - https://man.mtool.work/duckdb/1.3/clients/c/api.html
- Types – DuckDB 10887
- This page is for DuckDB 1.3, which is outdated.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
...pe ); char * duckdb_enum_dictionary_value ( duckdb_logical_type type , idx_t index ); duckdb_logical_type duckdb_list_type_child_type ( duckdb_logical_type type ); duckdb_logical_type duckdb_array_type_child_type ( duckdb_logical_type type ); idx_t du...logical_type type ); duckdb_logical_type duckdb_map_type_value_type ( duckdb_logical_type type ); idx_t duckdb_struct_type_child_count ( duckdb_logical_type type ); char * duckdb_struct_type_child_name ( duckdb_logical_type type , idx_t index ); duckd...b_logical_type duckdb_struct_type_child_type ( duckdb_logical_type type , idx_t index ); idx_t duckdb_union_type_member_count ( duckdb_logical_type type ); char *... - https://man.mtool.work/duckdb/1.3/clients/c/types.html
- Execution Format – DuckDB 9564
- 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 storage when decompressing from constant compression. Dictionary Vectors Dictionary vectors are physically stored as a child vector, and a selection vector that contains indexes into the child vector. Dictionary vectors are emitted by the storage...al and don't need to chase any pointers). List Vectors List vectors are stored as a series of list entries together with a child Vector. The child vector contains the values that are present in the list, and the list entries specify how each individua...l list is constructed. struct list_entry_t { idx_t offset ; idx_t length ; }; The offset refers to the start row in the child Vector, the length keeps track of the size of the list of this row. List vectors can be stored recursively. For nested lis... - https://man.mtool.work/duckdb/1.3/internals/vector.html
- Values – DuckDB 8974
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...duckdb_value duckdb_create_null_value (); idx_t duckdb_get_list_size ( duckdb_value value ); duckdb_value duckdb_get_list_child ( duckdb_value value , idx_t index ); duckdb_value duckdb_create_enum_value ( duckdb_logical_type type , uint64_t value );...uint64_t duckdb_get_enum_value ( duckdb_value value ); duckdb_value duckdb_get_struct_child ( duckdb_value value , idx_t index ); char * duckdb_value_to_string ( duckdb_value value ); duckdb_destroy_value Destroys...type : The type of the struct values : The values for the struct fields Return Value The struct value, or nullptr, if any child type is DUCKDB_TYPE_ANY or DUCKDB_TYPE_INVALID . duckdb_create_list_value Creates a list value from a child (element) type... - https://man.mtool.work/duckdb/1.3/clients/c/value.html
- Types API – DuckDB 7919
- 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
...T int32 INTEGER int64 BIGINT int8 TINYINT uint16 USMALLINT uint32 UINTEGER uint64 UBIGINT uint8 UTINYINT Nested Types list[child_type] list type objects map to a LIST type of the child type. Which can also be arbitrarily nested. import duckdb from typ...ill also accept one of the type objects that can implicitly convert to a DuckDBPyType . list_type | array_type Parameters: child_type: DuckDBPyType struct_type | row_type Parameters: fields: Union[list[DuckDBPyType], dict[str, DuckDBPyType]] map_type...ーワード type DuckDBPyType duckdb typing Union dict types objects list import Parameters DuckDB uint Types also below float child print instance table shows mapping Built-in bytearray 関連するページ Python Client API Conversion between DuckDB and Pytho... - https://man.mtool.work/duckdb/1.3/clients/python/types.html
- TRY expression – DuckDB 7490
- 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
...on / SQL / Expressions Copy Markdown TRY expression The TRY expression ensures that errors caused by the input rows in the child (scalar) expression result in NULL for those rows, instead of causing the query to throw an error. The TRY expression was...y Casting Conversion convert cannot used combination volatile Documentation Expressions Copy Markdown ensures caused input child those instead causing 関連するページ CASE Expression WHERE Clause Star Expression Comparisons Expressions IN Operator See... - https://man.mtool.work/duckdb/1.3/sql/expressions/try.html
- Typecasting – DuckDB 7151
- 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
...ation. Lists / Arrays Lists can be explicitly cast to other lists using the same casting rules. The cast is applied to the children of the list. For example, if we convert an INTEGER[] list to a VARCHAR[] list, the child INTEGER elements are individua... - https://man.mtool.work/duckdb/1.3/sql/data_types/typecasting.html
- R-Tree Indexes – DuckDB 7097
- 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
...geometry (and the internal ID of the corresponding row) in the leaf nodes, and the bounding rectangle enclosing all of the child nodes in each internal node. The minimum bounding rectangle (MBR) of a geometry is the smallest rectangle that completely... - https://man.mtool.work/duckdb/1.3/core_extensions/spatial/r-tree_indexes.html
- COPY Statement – DuckDB 7061
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...{ __duckdb_field_id : 42 , i : 43 }}); Sets the field_id of column my_list to 42, and column element (default name of list child) to 43: COPY ( SELECT [ 128 , 256 ] AS my_list ) TO 'my.parquet' ( FIELD_IDS { my_list : { __duckdb_field_id : 42 , elemen...t : 43 }}); Sets the field_id of column my_map to 42, and columns key and value (default names of map children) to 43 and 44: COPY ( SELECT MAP { 'key1' : 128 , 'key2' : 256 } my_map ) TO 'my.parquet' ( FIELD_IDS { my_map : { __du... - https://man.mtool.work/duckdb/1.3/sql/statements/copy.html
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