Gets the scale of a numeric column.
public virtual size_t GetColumnScale(ul_column_num cid)
cid The 1-based ordinal column number.
0 if the column is not a numeric type or if the column does not exist. SQLE_COLUMN_NOT_FOUND is set if the column name does not exist. SQLE_DATATYPE_NOT_ALLOWED is set if the column type is not numeric.