// Copyright 2023 PingCAP, Inc.
//
// Licensed 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 <DataStreams/BlockIO.h>
#include <DataStreams/IBlockOutputStream.h>
#include <Interpreters/Context_fwd.h>
#include <Interpreters/IInterpreter.h>
#include <Parsers/ASTInsertQuery.h>

namespace DB
{
/** Interprets the INSERT query.
  */
class InterpreterInsertQuery : public IInterpreter
{
public:
    InterpreterInsertQuery(const ASTPtr & query_ptr_, const Context & context_, bool allow_materialized_ = false);

    /** Prepare a request for execution. Return block streams
      * - the stream into which you can write data to execute the query, if INSERT;
      * - the stream from which you can read the result of the query, if SELECT and similar;
      * Or nothing if the request INSERT SELECT (self-sufficient query - does not accept the input data, does not return the result).
      */
    BlockIO execute() override;

private:
    StoragePtr getTable(const ASTInsertQuery & query);
    Block getSampleBlock(const ASTInsertQuery & query, const StoragePtr & table);
    void checkAccess(const ASTInsertQuery & query);

    ASTPtr query_ptr;
    const Context & context;
    bool allow_materialized;
};


} // namespace DB