Command — Eagerly-Executed Logical Operators¶

Command is an extension of the LogicalPlan abstraction for logical operators that are executed early in the query plan lifecycle (unlike logical operators in general).

Command is a marker interface for logical operators that are executed when a Dataset is requested for the logical plan (which is after the query has been analyzed).

Implementations¶

• AlterNamespaceSetLocation
• AlterNamespaceSetProperties
• AlterTable
• CommentOnNamespace
• CommentOnTable
• CreateNamespace
• CreateTableAsSelect
• CreateV2Table
• DataWritingCommand
• DeleteFromTable
• DescribeNamespace
• DescribeRelation
• DropNamespace
• DropTable
• MergeIntoTable
• RefreshTable
• RenameTable
• ReplaceTable
• ReplaceTableAsSelect
• RunnableCommand
• SetCatalogAndNamespace
• ShowCurrentNamespace
• ShowNamespaces
• ShowTableProperties
• ShowTables
• ShowViews
• UpdateTable
• V2WriteCommand

Output Attributes¶

output: Seq[Attribute]

Command has no output attributes by default.

output is part of the QueryPlan abstraction.

Child Logical Operators¶

children: Seq[LogicalPlan]

Command has no child logical operators by default.

children is part of the TreeNode abstraction.

Statistics¶

stats: Statistics

Command has no Statistics by default.

stats is part of the LogicalPlanStats abstraction.