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DuckDB 1.3 ドキュメント 全文検索
Results of 1 - 2 of about 2 for typename (0.002 sec.)
- C++ API – DuckDB 11228
- This page is for DuckDB 1.3, which is outdated.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
...Fs so they are as efficient as built-in functions, we have two variants of this method interface as follows: 1. template < typename TR , typename ... Args > void CreateScalarFunction ( string name , TR ( * udf_func )( Args … )) template parameters: TR is...ister the UDF function; udf_func : is a pointer to the UDF function. This method automatically discovers from the template typenames the corresponding LogicalTypes: bool → LogicalType::BOOLEAN int8_t → LogicalType::TINYINT int16_t → LogicalType::SMALLINT...lType : INTEGER , TIME and DATE , then for disambiguation the users can use the following overloaded method. 2. template < typename TR , typename ... Args > void CreateScalarFunction ( string name , vector < LogicalType > args , LogicalType ret_type , TR... - https://man.mtool.work/duckdb/1.3/clients/cpp.html
- Casting – DuckDB 7485
- This page is for DuckDB 1.3, which is outdated.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
...sting can be found on the typecasting page . Explicit Casting The standard SQL syntax for explicit casting is CAST(expr AS TYPENAME) , where TYPENAME is a name (or alias) of one of DuckDB's data types . DuckDB also supports the shorthand expr::TYPENAME ,... - https://man.mtool.work/duckdb/1.3/sql/expressions/cast.html
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