[jira] [Assigned] (FLINK-3850) Add forward field annotations to DataSet operators generated by the Table API
[ https://issues.apache.org/jira/browse/FLINK-3850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Flink Jira Bot reassigned FLINK-3850: - Assignee: (was: Nikolay Vasilishin) > Add forward field annotations to DataSet operators generated by the Table API > - > > Key: FLINK-3850 > URL: https://issues.apache.org/jira/browse/FLINK-3850 > Project: Flink > Issue Type: Improvement > Components: Table SQL / Legacy Planner >Reporter: Fabian Hueske >Priority: Major > Labels: auto-unassigned, pull-request-available > Time Spent: 10m > Remaining Estimate: 0h > > The DataSet API features semantic annotations [1] to hint the optimizer which > input fields an operator copies. This information is valuable for the > optimizer because it can infer that certain physical properties such as > partitioning or sorting are not destroyed by user functions and thus generate > more efficient execution plans. > The Table API is built on top of the DataSet API and generates DataSet > programs and code for user-defined functions. Hence, it knows exactly which > fields are modified and which not. We should use this information to > automatically generate forward field annotations and attach them to the > operators. This can help to significantly improve the performance of certain > jobs. > [1] > https://ci.apache.org/projects/flink/flink-docs-release-1.0/apis/batch/index.html#semantic-annotations -- This message was sent by Atlassian Jira (v8.3.4#803005)
[jira] [Assigned] (FLINK-3850) Add forward field annotations to DataSet operators generated by the Table API
[ https://issues.apache.org/jira/browse/FLINK-3850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Nikolay Vasilishin reassigned FLINK-3850: - Assignee: Nikolay Vasilishin > Add forward field annotations to DataSet operators generated by the Table API > - > > Key: FLINK-3850 > URL: https://issues.apache.org/jira/browse/FLINK-3850 > Project: Flink > Issue Type: Improvement > Components: Table API & SQL >Reporter: Fabian Hueske >Assignee: Nikolay Vasilishin > > The DataSet API features semantic annotations [1] to hint the optimizer which > input fields an operator copies. This information is valuable for the > optimizer because it can infer that certain physical properties such as > partitioning or sorting are not destroyed by user functions and thus generate > more efficient execution plans. > The Table API is built on top of the DataSet API and generates DataSet > programs and code for user-defined functions. Hence, it knows exactly which > fields are modified and which not. We should use this information to > automatically generate forward field annotations and attach them to the > operators. This can help to significantly improve the performance of certain > jobs. > [1] > https://ci.apache.org/projects/flink/flink-docs-release-1.0/apis/batch/index.html#semantic-annotations -- This message was sent by Atlassian JIRA (v6.3.4#6332)
