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SQL Quirks 11228
Like all programming languages and libraries, DuckDB has its share of idiosyncrasies and inconsistencies. Some are vestiges of our feathered friend's evolution; others are inevitable because we strive to adhere to the SQL Standard and speci ... ions ( row_number , rank , dense_rank ). However, similarly to PostgreSQL, JSON features use a zero-based indexing . Types UINT8 vs. INT8 UINT8 and INT8 are aliases to integer types of different widths: UINT8 corresponds to UTINYINT because it's an 8 ... d integer INT8 corresponds to BIGINT because it's an 8-byte signed integer Explanation: the n in the numeric type INTn and UINTn denote the width of the number in either bytes or bits. INT1 , INT2 , INT4 correspond to the number of bytes, while INT16 ... , INT32 and INT64 correspond to the number of bits. The same applies to UINT values. However, the value n = 8 is a valid choice for both the number of bits and bytes. For unsigned values, UINT8 corre ...
https://man.mtool.work/duckdb/2.0/sql/dialect/sql_quirks.html
Write User Defined Functions 7485
Overview The Go client can register user-defined functions written in Go: scalar functions that map input rows to a single output value, and table functions that produce a set of rows. It can also register a replacement scan that rewrites a ... e, err } func (udf *incrementTableUDF) Cardinality() *duckdb.CardinalityInfo { return &duckdb.CardinalityInfo{Cardinality: uint(udf.tableSize), Exact: true} } func main() { db, err := sql.Open("duckdb", "") check(err) defer db.Close() conn, err := db ...
https://man.mtool.work/duckdb/2.0/clients/go/functions.html
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DuckDB 2.0 Documentation / man.mtool.work