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DuckDB 2.0 ドキュメント 全文検索
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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
...n; import java.sql.DriverManager; import org.duckdb.DuckDBColumnType; import org.duckdb.DuckDBFunctions; import org.duckdb.DuckDBLogicalType; try (Connection conn = DriverManager.getConnection("jdbc:duckdb:"); DuckDBLogicalType intType = DuckDBLogicalType.of(Duck...erpart to reading query results with chunked results . try (Connection conn = DriverManager.getConnection("jdbc:duckdb:"); DuckDBLogicalType tsType = DuckDBLogicalType.of(DuckDBColumnType.TIMESTAMP); DuckDBLogicalType strType = DuckDBLogicalType.of(DuckDBColumnTy...pe.VARCHAR); DuckDBLogicalType dblType = DuckDBLogicalType.of(DuckDBColumnType.DOUBLE)) { DuckDBFunctions.scalarFunction() .withName("java_event_label")... - https://man.mtool.work/duckdb/2.0/clients/java/functions.html
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