compiler.py 文件源码

def get_column_specification(self, column, **kwargs):

        if column.table is None:
            raise exc.CompileError(
                "Teradata requires Table-bound columns "
                "in order to generate DDL")

        colspec = (self.preparer.format_column(column) + " " +\
                        self.dialect.type_compiler.process(
                          column.type, type_expression=column))

        # Null/NotNull
        if column.nullable is not None:
            if not column.nullable or column.primary_key:
                colspec += " NOT NULL"

        return colspec