ExposesMetadataColumns Logical Operators¶

ExposesMetadataColumns is an extension of the LogicalPlan abstraction for logical operators that can add extra metadata columns to the output columns.

Contract¶

Add Metadata Columns to Output Columns¶

withMetadataColumns(): LogicalPlan

See:

• DataSourceV2Relation
• LogicalRelation
• StreamingRelationV2 (Spark Structured Streaming)

Used when:

• AddMetadataColumns logical analysis rule is executed (and addMetadataCol)

Implementations¶

• DataSourceV2Relation
• LogicalRelation
• StreamingRelation (Spark Structured Streaming)
• StreamingRelationV2 (Spark Structured Streaming)