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- Run Queries 9414
- Overview A Connection runs SQL through two families of methods: The execute_* methods ( execute() and execute_batch() ) send statements that do not return rows, such as INSERT or DDL, and report the number of affected rows. The query_* meth
...(params![2, "Jane"])?; Mapping Rows to Rust Values To read a result set, prepare a SELECT and call query_map() , passing a closure that builds a value from each Row . Columns are read by 0-based index with row.get() , whose return type is inferred from...s basic example . Reading a Single Row When a query returns exactly one row, Connection::query_row() runs it and applies a closure to that row in one call, without preparing a statement by hand. The <(T,)>::try_from(row) helper converts a single-column..._row("SELECT count(*) FROM person", [], |row| { <(i64,)>::try_from(row) })?; query_row_and_then() is the counterpart for a closure that returns a custom error type. Reading Nested and Composite Types DuckDB's nested and composite types are read through... - https://man.mtool.work/duckdb/2.0/clients/rust/querying.html
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