[
https://issues.apache.org/jira/browse/IMPALA-7330?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Todd Lipcon resolved IMPALA-7330.
---------------------------------
Resolution: Fixed
Fix Version/s: Impala 3.1.0
> Make the table metadata refresh after "LOAD" commands incremental
> -----------------------------------------------------------------
>
> Key: IMPALA-7330
> URL: https://issues.apache.org/jira/browse/IMPALA-7330
> Project: IMPALA
> Issue Type: Improvement
> Components: Catalog
> Affects Versions: Impala 3.1.0
> Reporter: bharath v
> Assignee: Todd Lipcon
> Priority: Major
> Labels: perf
> Fix For: Impala 3.1.0
>
>
> Currently, any LOAD command refreshes the entire table metadata after loading
> the required files.
> {code}
> case TStmtType::LOAD: {
> DCHECK(exec_request_.__isset.load_data_request);
> TLoadDataResp response;
> RETURN_IF_ERROR(
> frontend_->LoadData(exec_request_.load_data_request, &response));
> request_result_set_.reset(new vector<TResultRow>);
> request_result_set_->push_back(response.load_summary);
> // Now refresh the table metadata.
> TCatalogOpRequest reset_req;
> reset_req.__set_sync_ddl(exec_request_.query_options.sync_ddl);
> reset_req.__set_op_type(TCatalogOpType::RESET_METADATA);
> reset_req.__set_reset_metadata_params(TResetMetadataRequest());
>
> reset_req.reset_metadata_params.__set_header(TCatalogServiceRequestHeader());
> reset_req.reset_metadata_params.__set_is_refresh(true);
> reset_req.reset_metadata_params.__set_table_name(
> exec_request_.load_data_request.table_name);
> reset_req.reset_metadata_params.__set_sync_ddl(
> exec_request_.query_options.sync_ddl);
> catalog_op_executor_.reset(
> new CatalogOpExecutor(exec_env_, frontend_, server_profile_));
> RETURN_IF_ERROR(catalog_op_executor_->Exec(reset_req));
> RETURN_IF_ERROR(parent_server_->ProcessCatalogUpdateResult(
> *catalog_op_executor_->update_catalog_result(),
> exec_request_.query_options.sync_ddl));
> break;
> }{code}
> Refreshing the entire table is not always required, especially if we load
> only into a single partition via,
> {code}
> LOAD DATA INPATH '...path...' INTO TABLE t PARTITION (...);
> {code}
> The idea is to make this refresh post-load incremental and only refresh newly
> updated/created partitions.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
