C API - Appender

Appenders are the most efficient way of loading data into DuckDB from within the C interface, and are recommended for fast data loading. The appender is much faster than using prepared statements or individual INSERT INTO statements. Appends are made in row-wise format. For every column, a duckdb_append_[type] call should be made, after which the row should be finished by calling duckdb_appender_end_row. After all rows have been appended, duckdb_appender_destroy should be used to finalize the appender and clean up the resulting memory. Note that duckdb_appender_destroy should always be called on the resulting appender, even if the function returns DuckDBError. Example…