RunnableCommand Logical Operators¶
RunnableCommand is an extension of the Command abstraction for logical commands that can be executed for side effects.
Contract¶
Executing Command¶
run(
sparkSession: SparkSession): Seq[Row]
Executes the command for side effects (possibly giving Row back with the result)
Used when:
- ExecutedCommandExec leaf physical operator is executed (and caches the result)
- InsertIntoHadoopFsRelationCommand is executed
Implementations¶
- AddFileCommand
- AddJarCommand
- AlterDatabasePropertiesCommand
- AlterDatabaseSetLocationCommand
- AlterTableAddColumnsCommand
- AlterTableAddPartitionCommand
- AlterTableChangeColumnCommand
- AlterTableDropPartitionCommand
- AlterTableRecoverPartitionsCommand
- AlterTableRenameCommand
- AlterTableRenamePartitionCommand
- AlterTableSerDePropertiesCommand
- AlterTableSetLocationCommand
- AlterTableSetPropertiesCommand
- AlterTableUnsetPropertiesCommand
- AlterViewAsCommand
- AnalyzeColumnCommand
- AnalyzePartitionCommand
- AnalyzeTableCommand
- CacheTableCommand
- ClearCacheCommand
- CreateDatabaseCommand
- CreateDataSourceTableCommand
- CreateFunctionCommand
- CreateTableCommand
- CreateTableLikeCommand
- CreateTempViewUsing
- CreateViewCommand
- DescribeColumnCommand
- DescribeCommandBase
- DescribeDatabaseCommand
- DescribeFunctionCommand
- DropDatabaseCommand
- DropFunctionCommand
- DropTableCommand
- ExplainCommand
- ExternalCommandExecutor
- InsertIntoDataSourceCommand
- InsertIntoDataSourceDirCommand
- ListFilesCommand
- ListJarsCommand
- LoadDataCommand
- RefreshResource
- RefreshTable
- ResetCommand
- SaveIntoDataSourceCommand
- SetCommand
- ShowColumnsCommand
- ShowCreateTableAsSerdeCommand
- ShowCreateTableCommand
- ShowFunctionsCommand
- ShowPartitionsCommand
- ShowTablePropertiesCommand
- ShowTablesCommand
- ShowViewsCommand
- StreamingExplainCommand
- TruncateTableCommand
- UncacheTableCommand
Query Planning¶
RunnableCommand logical operators are resolved to ExecutedCommandExec physical operators in BasicOperators execution planning strategy.
Performance Metrics¶
metrics: Map[String, SQLMetric]
metrics is empty by default.
Lazy Value
metrics is a Scala lazy value to guarantee that the code to initialize it is executed once only (when accessed for the first time) and cached afterwards.
metrics is used when:
- ExecutedCommandExec leaf physical operator is executed (and requested for performance metrics)
Last update: 2021-06-01