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- DROP Statement – DuckDB 12446
- This page is for DuckDB 1.3, which is outdated.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
...FROM v ; Catalog Error: Table with name tbl does not exist! Limitations on Reclaiming Disk Space Running DROP TABLE should free the memory used by the table, but not always disk space. Even if disk space does not decrease, the free blocks will be mar...ked as free . For example, if we have a 2 GB file and we drop a 1 GB table, the file might still be 2 GB, but it should have 1 GB of f...ree blocks in it. To check this, use the following PRAGMA and check the number of free_blocks in the output: PRAGMA database_size ; For instruction on reclaiming space after dropping a table, refer to the “Rec... - https://man.mtool.work/duckdb/1.3/sql/statements/drop.html
- Complete API – DuckDB 11833
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...alue_is_null ( duckdb_result * result , idx_t col , idx_t row ); Helpers void * duckdb_malloc ( size_t size ); void duckdb_free ( void * ptr ); idx_t duckdb_vector_size (); bool duckdb_string_is_inlined ( duckdb_string_t string ); uint32_t duckdb_str...error : If set and the function returns DuckDBError , this contains the error message. Note that the error message must be freed using duckdb_free . Return Value DuckDBSuccess on success or DuckDBError on failure. duckdb_destroy_instance_cache Destro...error : If set and the function returns DuckDBError , this contains the error message. Note that the error message must be freed using duckdb_free . Return Value DuckDBSuccess on success or DuckDBError on failure. duckdb_close Closes the specified da... - https://man.mtool.work/duckdb/1.3/clients/c/api.html
- Types – DuckDB 10275
- This page is for DuckDB 1.3, which is outdated.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
...s not auto-cast and only works for VARCHAR columns. The reason this function exists is that the result does not need to be freed. duckdb_value_varchar and duckdb_value_blob require the result to be de-allocated using duckdb_free . duckdb_fetch_chunk...type_get_alias Returns the alias of a duckdb_logical_type, if set, else nullptr . The result must be destroyed with duckdb_free . Syntax char * duckdb_logical_type_get_alias ( duckdb_logical_type type ); Parameters type : The logical type Return Valu...pe duckdb_enum_dictionary_value Retrieves the dictionary value at the specified position from the enum. The result must be freed with duckdb_free . Syntax char * duckdb_enum_dictionary_value ( duckdb_logical_type type , idx_t index ); Parameters type... - https://man.mtool.work/duckdb/1.3/clients/c/types.html
- ODBC 101: A Duck Themed Guide to ODBC – DuckDB 10275
- 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
...ging driver behavior, resource allocation Additional information Must be allocated once per application upon starting, and freed at the end. Connection Handle name Connection Type name SQL_HANDLE_DBC Description Represents a connection to a data sour...ng more queries and doing any thing else we want to do with the database such as inserting, updating, or deleting data. 6. Free the Handles and Disconnecting Finally, we need to free the handles and disconnect from the database. First, we need to fre...e the statement handle: SQLFreeHandle ( SQL_HANDLE_STMT , stmt ); Then we need to disconnect from the database: SQLDisconnect ( dbc ); And finally, we nee... - https://man.mtool.work/duckdb/1.3/guides/odbc/general.html
- Values – DuckDB 9347
- 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
...nverted duckdb_get_varint Returns the duckdb_varint value of the given value. The data field must be destroyed with duckdb_free . Syntax duckdb_varint duckdb_get_varint ( duckdb_value val ); Parameters val : A duckdb_value containing a VARINT Return...Value A duckdb_varint. The data field must be destroyed with duckdb_free . duckdb_get_decimal Returns the duckdb_decimal value of the given value. Syntax duckdb_decimal duckdb_get_decimal ( duckd...A duckdb_blob duckdb_get_bit Returns the duckdb_bit value of the given value. The data field must be destroyed with duckdb_free . Syntax duckdb_bit duckdb_get_bit ( duckdb_value val ); Parameters val : A duckdb_value containing a BIT Return Value A d... - https://man.mtool.work/duckdb/1.3/clients/c/value.html
- Pragmas – DuckDB 8875
- 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
...abase block size total_blocks BIGINT , -- total blocks in the database used_blocks BIGINT , -- used blocks in the database free_blocks BIGINT , -- free blocks in the database wal_size VARCHAR , -- write ahead log size memory_usage VARCHAR , -- memory...agent ; Metadata Information The following statement returns information on the metadata store ( block_id , total_blocks , free_blocks , and free_list ): PRAGMA metadata_info ; Progress Bar Show progress bar when running queries: PRAGMA enable_progre... - https://man.mtool.work/duckdb/1.3/configuration/pragmas.html
- Startup & Shutdown – DuckDB 7947
- 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
...error : If set and the function returns DuckDBError , this contains the error message. Note that the error message must be freed using duckdb_free . Return Value DuckDBSuccess on success or DuckDBError on failure. duckdb_destroy_instance_cache Destro...error : If set and the function returns DuckDBError , this contains the error message. Note that the error message must be freed using duckdb_free . Return Value DuckDBSuccess on success or DuckDBError on failure. duckdb_close Closes the specified da... - https://man.mtool.work/duckdb/1.3/clients/c/connect.html
- Benchmarks – DuckDB 7632
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...make sure you are using the latest version (preferably the preview build ). If in doubt about your benchmark results, feel free to contact us at [email protected] . Disclaimer on Benchmarks Note that the benchmark results presented in this guide do n... - https://man.mtool.work/duckdb/1.3/guides/performance/benchmarks.html
- Integration with Polars – DuckDB 7474
- 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
...i32 ┆ str │ ╞═════╪════════╡ │ 1 ┆ banana │ │ 2 ┆ apple │ │ 3 ┆ mango │ └─────┴────────┘ To learn more about Polars, feel free to explore their Python API Reference . 関連キーワード Polars DataFrames DuckDB banana duckdb apple beetle library Apache... - https://man.mtool.work/duckdb/1.3/guides/python/polars.html
- Prepared Statements – DuckDB 7317
- 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 statement. If the prepared statement has no error message, this returns nullptr instead. The error message should not be freed. It will be de-allocated when duckdb_destroy_prepare is called. Syntax const char * duckdb_prepare_error ( duckdb_prepare...ber of parameters for. duckdb_parameter_name Returns the name used to identify the parameter The returned string should be freed using duckdb_free . Returns NULL if the index is out of range for the provided prepared statement. Syntax const char * du... - https://man.mtool.work/duckdb/1.3/clients/c/prepared.html
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