ClickHouse/src/Storages/StoragePostgreSQL.h

#pragma once

#if !defined(ARCADIA_BUILD)
#include "config_core.h"
#endif

#if USE_LIBPQXX
#include <ext/shared_ptr_helper.h>
#include <Interpreters/Context.h>
#include <Storages/IStorage.h>
#include <DataStreams/IBlockOutputStream.h>
#include <Storages/PostgreSQL/PoolWithFailover.h>


namespace DB
{


class StoragePostgreSQL final : public ext::shared_ptr_helper<StoragePostgreSQL>, public IStorage
{
    friend struct ext::shared_ptr_helper<StoragePostgreSQL>;
public:
    StoragePostgreSQL(
        const StorageID & table_id_,
        const postgres::PoolWithFailover & pool_,
        const String & remote_table_name_,
        const ColumnsDescription & columns_,
        const ConstraintsDescription & constraints_,
        ContextPtr context_,
        const std::string & remote_table_schema_ = "");

    String getName() const override { return "PostgreSQL"; }

    Pipe read(
        const Names & column_names,
        const StorageMetadataPtr & /*metadata_snapshot*/,
        SelectQueryInfo & query_info,
        ContextPtr context,
        QueryProcessingStage::Enum processed_stage,
        size_t max_block_size,
        unsigned num_streams) override;

    BlockOutputStreamPtr write(const ASTPtr & query, const StorageMetadataPtr & /*metadata_snapshot*/, ContextPtr context) override;

private:
    friend class PostgreSQLBlockOutputStream;

    String remote_table_name;
    String remote_table_schema;
    ContextPtr global_context;
    postgres::PoolWithFailoverPtr pool;
};

}

#endif