mirror of
https://github.com/apache/superset.git
synced 2026-04-14 13:44:46 +00:00
44 lines
1.6 KiB
Python
44 lines
1.6 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
|
|
# or more contributor license agreements. See the NOTICE file
|
|
# distributed with this work for additional information
|
|
# regarding copyright ownership. The ASF licenses this file
|
|
# to you under the Apache License, Version 2.0 (the
|
|
# "License"); you may not use this file except in compliance
|
|
# with the License. You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing,
|
|
# software distributed under the License is distributed on an
|
|
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
# KIND, either express or implied. See the License for the
|
|
# specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
"""
|
|
MySQL ANSI dialect for Apache Pinot.
|
|
|
|
This dialect is based on MySQL but follows ANSI SQL quoting conventions where
|
|
double quotes are used for identifiers instead of string literals.
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
|
|
from sqlglot.dialects.mysql import MySQL
|
|
|
|
|
|
class Pinot(MySQL):
|
|
"""
|
|
MySQL ANSI dialect used by Apache Pinot.
|
|
|
|
The main difference from standard MySQL is that double quotes (") are used for
|
|
identifiers instead of string literals, following ANSI SQL conventions.
|
|
|
|
See: https://calcite.apache.org/javadocAggregate/org/apache/calcite/config/Lex.html#MYSQL_ANSI
|
|
"""
|
|
|
|
class Tokenizer(MySQL.Tokenizer):
|
|
QUOTES = ["'"] # Only single quotes for strings
|
|
IDENTIFIERS = ['"', "`"] # Backticks and double quotes for identifiers
|
|
STRING_ESCAPES = ["'", "\\"] # Remove double quote from string escapes
|