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#pragma once
#include "clickhouse_config.h"
#if USE_LIBPQXX
#include <Interpreters/Context.h>
#include <Storages/IStorage.h>
namespace Poco
{
class Logger;
}
namespace postgres
{
class PoolWithFailover;
using PoolWithFailoverPtr = std::shared_ptr<PoolWithFailover>;
}
namespace DB
{
class NamedCollection;
class StoragePostgreSQL final : public IStorage
{
public:
StoragePostgreSQL(
const StorageID & table_id_,
postgres::PoolWithFailoverPtr pool_,
const String & remote_table_name_,
const ColumnsDescription & columns_,
const ConstraintsDescription & constraints_,
const String & comment,
ContextPtr context_,
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,
size_t num_streams) override;
SinkToStoragePtr write(const ASTPtr & query, const StorageMetadataPtr & /*metadata_snapshot*/, ContextPtr context, bool async_insert) override;
struct Configuration
{
String host;
UInt16 port = 0;
String username = "default";
String password;
String database;
String table;
String schema;
String on_conflict;
std::vector<std::pair<String, UInt16>> addresses; /// Failover replicas.
String addresses_expr;
};
static Configuration getConfiguration(ASTs engine_args, ContextPtr context);
static Configuration processNamedCollectionResult(const NamedCollection & named_collection, bool require_table = true);
static ColumnsDescription getTableStructureFromData(
const postgres::PoolWithFailoverPtr & pool_,
const String & table,
const String & schema,
const ContextPtr & context_);
private:
String remote_table_name;
String remote_table_schema;
String on_conflict;
postgres::PoolWithFailoverPtr pool;
Poco::Logger * log;
};
}
#endif
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