be/src/exec/schema_scanner/schema_charsets_scanner.h

// 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 <stdint.h>

#include <vector>

#include "common/status.h"
#include "exec/schema_scanner.h"

namespace doris {
namespace vectorized {
class Block;
} // namespace vectorized

class SchemaCharsetsScanner : public SchemaScanner {
    ENABLE_FACTORY_CREATOR(SchemaCharsetsScanner);

public:
    SchemaCharsetsScanner();
    ~SchemaCharsetsScanner() override;

    Status get_next_block_internal(vectorized::Block* block, bool* eos) override;

private:
    struct CharsetStruct {
        const char* charset = nullptr;
        const char* default_collation = nullptr;
        const char* description = nullptr;
        int64_t maxlen;
    };

    Status _fill_block_impl(vectorized::Block* block);

    static std::vector<SchemaScanner::ColumnDesc> _s_css_columns;
    static CharsetStruct _s_charsets[];
};

} // namespace doris