compiler.py 文件源码

def compile_clause(c, compiler, tables, format_args):
    if isinstance(c, BindParameter) and isinstance(c.value, (
            str, int, re._pattern_type, ZdbLiteral)):
        if isinstance(c.value, str):
            return "\"%s\"" % escape_tokens(c.value)
        elif isinstance(c.value, re._pattern_type):
            return "\"%s\"" % c.value.pattern
        elif isinstance(c.value, ZdbLiteral):
            return c.value.literal
        else:
            return c.value
    elif isinstance(c, (True_, False_)):
        return str(type(c) == True_).lower()
    elif isinstance(c, TextClause):
        return c.text
    elif isinstance(c, BinaryExpression):
        return compile_binary_clause(c, compiler, tables, format_args)
    elif isinstance(c, BooleanClauseList):
        return compile_boolean_clause_list(c, compiler, tables, format_args)
    elif isinstance(c, Column):
        return compile_column_clause(c, compiler, tables, format_args)
    elif isinstance(c, Grouping):
        return compile_grouping(c, compiler, tables, format_args)
    elif isinstance(c, Null):
        return "NULL"
    raise ValueError("Unsupported clause")