ROUND with precision parameter is not supported for double precision data type in PostgreSQL

ERR.DS_API.DB.INVALID_FUNCTION.PG_DOUBLE_PRECISION_ROUND

The ROUND function with the precision parameter isn't supported for the double precision type of the PostgreSQL data source.

DataLens recognizes the double precision and numeric types from PostgreSQL as a Fractional numbers. Out of these two types, the ROUND function with the precision parameter only accepts the numeric type. To cast double precision back to the database level, use DB_CAST.

Example:

ROUND(DB_CAST([your field]/1000000, 'numeric', 16, 8) [, precision ]), where 16 is the total count of digits in a fractional number, and 8 is the count of digits in its fractional part.