rdblue commented on a change in pull request #24723: [SPARK-27857][SQL] Move
ALTER TABLE parsing into Catalyst
URL: https://github.com/apache/spark/pull/24723#discussion_r290388576
##########
File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
##########
@@ -720,7 +734,7 @@ intervalUnit
;
colPosition
- : FIRST | AFTER identifier
+ : FIRST | AFTER qualifiedName
Review comment:
I should also add that it is valid to reorder nested fields:
```
ALTER TABLE tbl ADD point.z bigint AFTER point.y
```
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