brkyvz commented on a change in pull request #26817: [SPARK-30192][SQL] support
column position in DS v2
URL: https://github.com/apache/spark/pull/26817#discussion_r356291201
##########
File path:
sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/TableChange.java
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@@ -259,6 +298,60 @@ public int hashCode() {
}
}
+ interface ColumnPosition {
+ First FIRST = new First();
+
+ static ColumnPosition After(String[] column) {
Review comment:
Also should AFTER take a multipart identifier? Should the syntax be:
```
ALTER TABLE ADD COLUMN m.n.y STRING AFTER x
```
where x is a column after the nested field `m.n.x`
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