Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/15717#discussion_r91862111
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlParser.scala ---
@@ -877,6 +877,35 @@ class SparkSqlAstBuilder(conf: SQLConf) extends
AstBuilder {
}
/**
+ * Create a [[AlterTableChangeColumnsCommand]] command.
+ *
+ * For example:
+ * {{{
+ * ALTER TABLE table [PARTITION partition_spec]
+ * CHANGE [COLUMN] `col` `col` dataType [COMMENT "comment"] [FIRST |
AFTER `otherCol`]
+ * [, `col2` `col2` dataType [COMMENT "comment"] [FIRST | AFTER
`otherCol`], ...]
+ * }}}
+ */
+ override def visitChangeColumns(ctx: ChangeColumnsContext): LogicalPlan
= withOrigin(ctx) {
+ if (ctx.partitionSpec != null) {
+ operationNotAllowed(s"ALTER TABLE PARTITION partition_spec CHANGE
COLUMN, can not change " +
--- End diff --
Nit: remove the string interpolation
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