// 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.

#include "storage/schema.h"

#include <glog/logging.h>

#include <boost/iterator/iterator_facade.hpp>

#include <ostream>

#include <unordered_set>

#include <utility>

#include "common/config.h"

#include "core/column/column_array.h"

#include "core/column/column_decimal.h"

#include "core/column/column_dictionary.h"

#include "core/column/column_map.h"

#include "core/column/column_nullable.h"

#include "core/column/column_string.h"

#include "core/column/column_struct.h"

#include "core/column/column_vector.h"

#include "core/data_type/data_type.h"

#include "core/data_type/data_type_factory.hpp"

#include "core/data_type/define_primitive_type.h"

#include "core/types.h"

#include "storage/olap_common.h"

#include "util/trace.h"

namespace doris {

Schema::Schema(const Schema& other) {

    _copy_from(other);

}

Schema& Schema::operator=(const Schema& other) {

    if (this != &other) {

        _copy_from(other);

    }

    return *this;

}

void Schema::_copy_from(const Schema& other) {

    _col_ids = other._col_ids;

    _column_id_to_index = other._column_id_to_index;

    _num_key_columns = other._num_key_columns;

    _delete_sign_idx = other._delete_sign_idx;

    _has_sequence_col = other._has_sequence_col;

    _rowid_col_idx = other._rowid_col_idx;

    _version_col_idx = other._version_col_idx;

    _lsn_col_idx = other._lsn_col_idx;

    _tso_col_idx = other._tso_col_idx;

    _cols.resize(other._cols.size());

    for (auto cid : _col_ids) {

        _cols[cid] = other._cols[cid];

    }

}

void Schema::_init(const std::vector<TabletColumnPtr>& cols, const std::vector<ColumnId>& col_ids,

                   size_t num_key_columns) {

    _col_ids = col_ids;

    _num_key_columns = num_key_columns;

    _cols.resize(cols.size());

    std::unordered_set<uint32_t> col_id_set(col_ids.begin(), col_ids.end());

    _column_id_to_index.assign(cols.size(), -1);

    for (size_t i = 0; i < col_ids.size(); ++i) {

        _column_id_to_index[col_ids[i]] = static_cast<int>(i);

    }

    for (int cid = 0; cid < cols.size(); ++cid) {

        if (col_id_set.find(cid) == col_id_set.end()) {

            continue;

        }

        _cols[cid] = cols[cid];

    }

}

Schema::~Schema() = default;

DataTypePtr Schema::get_data_type_ptr(const TabletColumn& column) {

    return DataTypeFactory::instance().create_data_type(column);

}

IColumn::MutablePtr Schema::get_predicate_column_ptr(const DataTypePtr& data_type,

                                                     const ReaderType reader_type) {

    // Low-cardinality dictionary optimization substitutes a ColumnDictI32 for the

    // canonical string column during query reads. Every other case just materializes

    // the data type's own canonical column (which already wraps nullable for us).

    if (config::enable_low_cardinality_optimize && reader_type == ReaderType::READER_QUERY &&

        is_string_type(data_type->get_primitive_type())) {

        IColumn::MutablePtr ptr = doris::ColumnDictI32::create();

        if (data_type->is_nullable()) {

            return doris::ColumnNullable::create(std::move(ptr), doris::ColumnUInt8::create());

        }

        return ptr;

    }

    return data_type->create_column();

}

} // namespace doris