Numeric data types are valid when calling the function in an SQL statement, but not when using the function for ALC on a column.
If TD_LZ_COMPRESS is used with ALC, nulls are also compressed if those columns are nullable.
You can use the TD_LZ_COMPRESS function to compress JSON data; however, Teradata recommends that you use JSON_COMPRESS instead because the JSON_COMPRESS function is optimized for compressing JSON data.