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new ca2cfd4 [SPARK-31906][SQL][DOCS] Enhance comments in
NamedExpression.qualifier
ca2cfd4 is described below
commit ca2cfd4185586993f981cfd2f1aff30ee6b2294e
Author: lipzhu <lip...@ebay.com>
AuthorDate: Tue Jun 9 13:59:00 2020 +0000
[SPARK-31906][SQL][DOCS] Enhance comments in NamedExpression.qualifier
### Why are the changes needed?
The qualifier name should contains catalog name.
### Does this PR introduce _any_ user-facing change?
NO.
### How was this patch tested?
UT.
Closes #28726 from lipzhu/SPARK-31906.
Authored-by: lipzhu <lip...@ebay.com>
Signed-off-by: Wenchen Fan <wenc...@databricks.com>
---
.../org/apache/spark/sql/catalyst/expressions/namedExpressions.scala | 1 +
1 file changed, 1 insertion(+)
diff --git
a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
index 77b4cec..2abd9d7 100644
---
a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
+++
b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
@@ -85,6 +85,7 @@ trait NamedExpression extends Expression {
* e.g. top level attributes aliased in the SELECT clause, or column from
a LocalRelation.
* 2. Seq with a Single element: either the table name or the alias name of
the table.
* 3. Seq with 2 elements: database name and table name
+ * 4. Seq with 3 elements: catalog name, database name and table name
*/
def qualifier: Seq[String]
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