feat(snowflake)!: Transpilation of TO_BINARY from snowflake to duckdb #6504
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…#6504) * support TO_BINARY transpilation from snowflake to duckdb * add default format for snowflake * fix tests * address comments * small fix * use type inference for transpilation * small update * Remove unnecessary `FUNCTIONS` entry. --------- Co-authored-by: Jo <[email protected]>
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https://docs.snowflake.com/en/sql-reference/functions/to_binary
In Snowflake, TO_BINARY takes an input string with an optional format argument (like 'BASE64'), reads this string according to the format (default is HEX), and converts it to binary. But in DuckDB, the TO_BINARY function takes a UTF-8 string coverts it to binary but returns it as string (like '0101').
So we need to take care of the input format and the return type.
if the return_type is BINARY (like snowflake):
(Snowflake -> DuckDB)
- TO_BINARY('48454C50', 'HEX') → UNHEX('48454C50')
- TO_BINARY('TEST', 'UTF-8') → ENCODE('TEST')
- TO_BINARY('SEVMUA==', 'BASE64') → FROM_BASE64('SEVMUA==')
If the return_type is VARCHAR (like DuckDB), we can use DuckDB's native TO_BINARY.
For this PR only transpilation from Snowflake to DuckDB is supported.