ClickHouse/src/Storages/StoragePostgreSQL.h

#pragma once

#include "config_core.h"

#if USE_LIBPQXX
#include <base/shared_ptr_helper.h>
#include <Interpreters/Context.h>
#include <Storages/IStorage.h>
#include <Core/PostgreSQL/PoolWithFailover.h>
#include <Storages/ExternalDataSourceConfiguration.h>

namespace Poco
{
class Logger;
}

namespace DB
{

class StoragePostgreSQL final : public shared_ptr_helper<StoragePostgreSQL>, public IStorage
{
    friend struct shared_ptr_helper<StoragePostgreSQL>;
public:
    StoragePostgreSQL(
        const StorageID & table_id_,
        postgres::PoolWithFailoverPtr pool_,
        const String & remote_table_name_,
        const ColumnsDescription & columns_,
        const ConstraintsDescription & constraints_,
        const String & comment,
        const String & remote_table_schema_ = "",
        const String & on_conflict = "");

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

    Pipe read(
        const Names & column_names,
        const StorageSnapshotPtr & storage_snapshot,
        SelectQueryInfo & query_info,
        ContextPtr context,
        QueryProcessingStage::Enum processed_stage,
        size_t max_block_size,
        unsigned num_streams) override;

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

    static StoragePostgreSQLConfiguration getConfiguration(ASTs engine_args, ContextPtr context);

private:
    friend class PostgreSQLBlockOutputStream;

    String remote_table_name;
    String remote_table_schema;
    String on_conflict;
    postgres::PoolWithFailoverPtr pool;

    Poco::Logger * log;
};

}

#endif