Gets the scale of a numeric column.
size_t UltraLite_RowSchema_iface::GetColumnScale( const ULValue & column_id )
column_id A 1-based ordinal number.
0 if the column is not a numeric type or if the column does not exist.
Sets SQLE_COLUMN_NOT_FOUND if the column name does not exist.
Sets SQLE_DATATYPE_NOT_ALLOWED if the column type is not a numeric.
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