37d1519316
Issue Number: close #16351 Dynamic schema table is a special type of table, it's schema change with loading procedure.Now we implemented this feature mainly for semi-structure data such as JSON, since JSON is schema self-described we could extract schema info from the original documents and inference the final type infomation.This speical table could reduce manual schema change operation and easily import semi-structure data and extends it's schema automatically.
41 lines
1.7 KiB
C++
41 lines
1.7 KiB
C++
// 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.
|
|
#pragma once
|
|
|
|
#include <common/status.h>
|
|
#include <vec/columns/column.h>
|
|
#include <vec/json/json_parser.h>
|
|
#include <vec/json/simd_json_parser.h>
|
|
|
|
namespace doris::vectorized {
|
|
|
|
// parse a batch of json strings into column object
|
|
Status parse_json_to_variant(IColumn& column, const std::vector<StringRef>& jsons);
|
|
|
|
// parse a single json
|
|
Status parse_json_to_variant(IColumn& column, const StringRef& jsons,
|
|
JSONDataParser<SimdJSONParser>* parser);
|
|
|
|
// extract keys columns from json strings into columns
|
|
bool extract_key(MutableColumns& columns, const std::vector<StringRef>& jsons,
|
|
const std::vector<StringRef>& keys, const std::vector<ExtractType>& types);
|
|
|
|
// extract keys columns from colunnstring(json format) into columns
|
|
bool extract_key(MutableColumns& columns, const ColumnString& json_column,
|
|
const std::vector<StringRef>& keys, const std::vector<ExtractType>& types);
|
|
} // namespace doris::vectorized
|