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[KYUUBI #7180][LINEAGE] Subquery in the project should always drill down to get the lineage relationships #7181

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[KYUUBI #7180][LINEAGE] Subquery in the project should always drill down to get the lineage relationships #7181

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5 changes: 3 additions & 2 deletions ...e/src/main/scala/org/apache/kyuubi/plugin/lineage/helper/SparkSQLLineageParseHelper.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -119,14 +119,15 @@ trait LineageParser {
val exps = named.map {
case exp: Alias =>
val references =
if (exp.references.nonEmpty) exp.references
else {
if (exp.references.isEmpty || exp.child.isInstanceOf[ScalarSubquery]) {
val attrRefs = getExpressionSubqueryPlans(exp.child)
.map(extractColumnsLineage(_, ListMap[Attribute, AttributeSet]()))
.foldLeft(ListMap[Attribute, AttributeSet]())(mergeColumnsLineage).values
.foldLeft(AttributeSet.empty)(_ ++ _)
.map(attr => attr.withQualifier(attr.qualifier :+ SUBQUERY_COLUMN_IDENTIFIER))
AttributeSet(attrRefs)
} else {
exp.references
}
(
exp.toAttribute,
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12 changes: 12 additions & 0 deletions ...test/scala/org/apache/kyuubi/plugin/lineage/helper/SparkSQLLineageParserHelperSuite.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -1143,6 +1143,18 @@ abstract class SparkSQLLineageParserHelperSuite extends KyuubiFunSuite
List(
("a", Set(s"$DEFAULT_CATALOG.default.table1.a")),
("b", Set(s"$DEFAULT_CATALOG.default.table1.b")))))

val sql12 =
"""
|select (select sum(a) from table0 where table1.b = table0.b) as aa, b from table1
|""".stripMargin
val ret12 = extractLineage(sql12)
assert(ret12 == Lineage(
List(s"$DEFAULT_CATALOG.default.table0", s"$DEFAULT_CATALOG.default.table1"),
List(),
List(
("aa", Set(s"$DEFAULT_CATALOG.default.table0.a")),
("b", Set(s"$DEFAULT_CATALOG.default.table1.b")))))
}
}

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