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#pragma once
#include "clickhouse_config.h"
#if USE_AZURE_BLOB_STORAGE
#include <TableFunctions/ITableFunction.h>
#include <TableFunctions/TableFunctionAzureBlobStorage.h>
#include <TableFunctions/ITableFunctionCluster.h>
#include <Storages/StorageAzureBlobCluster.h>
namespace DB
{
class Context;
/**
* azureBlobStorageCluster(cluster_name, source, [access_key_id, secret_access_key,] format, compression_method, structure)
* A table function, which allows to process many files from Azure Blob Storage on a specific cluster
* On initiator it creates a connection to _all_ nodes in cluster, discloses asterisks
* in Azure Blob Storage file path and dispatch each file dynamically.
* On worker node it asks initiator about next task to process, processes it.
* This is repeated until the tasks are finished.
*/
class TableFunctionAzureBlobStorageCluster : public ITableFunctionCluster<TableFunctionAzureBlobStorage>
{
public:
static constexpr auto name = "azureBlobStorageCluster";
static constexpr auto signature = " - cluster, connection_string|storage_account_url, container_name, blobpath, [account_name, account_key, format, compression, structure]";
String getName() const override
{
return name;
}
String getSignature() const override
{
return signature;
}
protected:
StoragePtr executeImpl(
const ASTPtr & ast_function,
ContextPtr context,
const std::string & table_name,
ColumnsDescription cached_columns,
bool is_insert_query) const override;
const char * getStorageTypeName() const override { return "AzureBlobStorageCluster"; }
};
}
#endif
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