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- Appender 11228
- The Appender can be used to load bulk data into a DuckDB database. It is available in the C, C++, Go, Java, Julia, Node.js, Python, and Rust clients. This page describes how the Appender behaves across clients and shows a minimal example in
...et table, adds rows, and then flushes. The examples below insert into a table with an integer and a string column. C++ The AppendRow function is the easiest way of appending data. It uses recursive templates to allow you to put all the values of a single...onnection con(db); con.Query("CREATE TABLE people (id INTEGER, name VARCHAR)"); Appender appender(con, "people"); appender.AppendRow(1, "Mark"); Rows can also be individually constructed using the BeginRow , EndRow , and Append methods. This is done inter...nally by AppendRow , and hence has the same performance characteristics: appender.BeginRow(); appender.Append<int32_t>(2); appender.Append<st... - https://man.mtool.work/duckdb/2.0/data/appender.html
- Import Data 7485
- Overview The Go client offers two ways to load data into DuckDB in bulk: the high-performance Appender for inserting rows generated in Go, and reading directly from data files such as Parquet, CSV, and JSON. Both are described below. For in
...{ log.Fatal(err) } defer appender.Close() // Each argument is one column value, in table column order. if err := appender.AppendRow("Fred", int32(34)); err != nil { log.Fatal(err) } Each argument to AppendRow() is a column value in table-column order, an...d its Go type must match the column's DuckDB type; the example passes int32(34) for an INTEGER column. Call AppendRow() once per row. Warning The appender buffers rows and flushes them to DuckDB in chunks, so a constraint violation such as...a NOT NULL or foreign-key failure may surface only when the buffer is flushed rather than from the AppendRow() call that added the offending row. Call Flush() and check its error to force pending rows in before relying on them, and... - https://man.mtool.work/duckdb/2.0/clients/go/data_import.html
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