YannByron commented on code in PR #2365:
URL: https://github.com/apache/incubator-paimon/pull/2365#discussion_r1401676633
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paimon-spark/paimon-spark-common/src/main/scala/org/apache/spark/sql/catalyst/analysis/AssignmentAlignmentHelper.scala:
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@@ -35,24 +36,32 @@ trait AssignmentAlignmentHelper extends SQLConfHelper {
private case class AttrUpdate(ref: Seq[String], expr: Expression)
/**
- * Align update assignments to the given attrs, only supports PrimitiveType
and StructType. For
- * example, if attrs are [a int, b int, s struct(c1 int, c2 int)] and update
assignments are [a =
- * 1, s.c1 = 2], will return [1, b, struct(2, c2)].
+ * Generate aligned expressions, only supports PrimitiveType and StructType.
For example, if attrs
+ * are [a int, b int, s struct(c1 int, c2 int)] and update assignments are
[a = 1, s.c1 = 2], will
+ * return [1, b, struct(2, c2)].
* @param attrs
* target attrs
* @param assignments
* update assignments
* @return
- * aligned update expressions
+ * aligned expressions
*/
- protected def alignUpdateAssignments(
+ protected def generateAlignedExpressions(
attrs: Seq[Attribute],
assignments: Seq[Assignment]): Seq[Expression] = {
val attrUpdates = assignments.map(a => AttrUpdate(toRefSeq(a.key),
a.value))
recursiveAlignUpdates(attrs, attrUpdates)
}
- def toRefSeq(expr: Expression): Seq[String] = expr match {
+ protected def alignAssignments(
+ attrs: Seq[Attribute],
+ assignments: Seq[Assignment]): Seq[Assignment] = {
+ generateAlignedExpressions(attrs, assignments).zip(attrs).map {
+ case (expression, field) => Assignment(field, expression)
+ }
+ }
+
+ private def toRefSeq(expr: Expression): Seq[String] = expr match {
Review Comment:
can we move this method to `ExpressionHelper`~
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