information_schema.routines.numeric_scale

Note:

For numeric types, the scale (significant digits to the right of the decimal point). NULL if not a numeric field.

Note:

Always null, since this information is not applied to return data types in PostgreSQL

Note:

Always null, since this information is not applied to return data types in PostgreSQL

Note:

Always NULL.

Note:

Scale of the return value. For nonnumeric types, returns NULL.