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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

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.


Last update: 2020-11-20