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- Write User Defined Functions 9414
- Overview The JDBC driver can register user-defined functions (UDFs) written in Java, including scalar functions and table functions. This page covers building and registering both, from the simple functional-interface overloads to the vecto
...ly to a Java functional interface. Pick the overload that matches the number of arguments and, for primitives, their type: withFunction(Supplier) , withFunction(Function) , and withFunction(BiFunction) take zero, one, or two boxed ( Object ) arguments. withI...the variadic arguments as an Object[] . withVarArgs() has to be set before withVarArgsFunction() , and the object-argument withFunction() overloads cannot be combined with varargs. import java.sql.Connection; import java.sql.DriverManager; import org.duckdb....(Class<?>... | DuckDBColumnType... | DuckDBLogicalType...) withReturnType(Class<?> | DuckDBColumnType | DuckDBLogicalType) withFunction(Supplier | Function | BiFunction) withIntFunction(IntUnaryOperator | IntBinaryOperator) withLongFunction(LongUnaryOperator... - https://man.mtool.work/duckdb/2.0/clients/java/functions.html
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