object MergeRows extends Serializable
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- case class Discard(condition: Expression) extends Expression with Instruction with UnaryLike[Expression] with Product with Serializable
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sealed
trait
Instruction extends Expression with Unevaluable
When a MERGE operation is rewritten, the target table is joined with the source and each MATCHED/NOT MATCHED/NOT MATCHED BY SOURCE clause is converted into a corresponding instruction on top of the joined plan.
When a MERGE operation is rewritten, the target table is joined with the source and each MATCHED/NOT MATCHED/NOT MATCHED BY SOURCE clause is converted into a corresponding instruction on top of the joined plan. The purpose of an instruction is to derive an output row based on a joined row.
Instructions are valid expressions so that they will be properly transformed by the analyzer and optimizer.
- case class Keep(condition: Expression, output: Seq[Expression]) extends Expression with Instruction with Product with Serializable
- case class Split(condition: Expression, output: Seq[Expression], otherOutput: Seq[Expression]) extends Expression with Instruction with Product with Serializable
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- final val ROW_ID: String("__row_id")
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