beliefer commented on code in PR #42524:
URL: https://github.com/apache/spark/pull/42524#discussion_r1361853134
##########
sql/core/src/main/scala/org/apache/spark/sql/execution/command/ddl.scala:
##########
@@ -377,7 +377,10 @@ case class AlterTableChangeColumnCommand(
val resolver = sparkSession.sessionState.conf.resolver
DDLUtils.verifyAlterTableType(catalog, table, isView = false)
- // Find the origin column from dataSchema by column name.
+ // Check that the column is not a partition column
+ if (table.partitionSchema.fieldNames.exists(resolver(columnName, _))) {
+ throw
QueryCompilationErrors.cannotAlterPartitionColumn(table.qualifiedName,
columnName)
+ }
val originColumn = findColumnByName(table.dataSchema, columnName, resolver)
Review Comment:
It seems we should keep the origin comment here.
##########
sql/core/src/test/scala/org/apache/spark/sql/execution/command/DDLSuite.scala:
##########
@@ -2405,6 +2405,21 @@ abstract class DDLSuite extends QueryTest with
DDLSuiteBase {
"operation" -> "generated columns")
)
}
+
+ test("SPARK-44837: Error when altering partition column in non-delta table")
{
+ withTable("t") {
+ sql("CREATE TABLE t(i INT, j INT, k INT) USING parquet PARTITIONED BY
(i, j)")
+ val e = intercept[AnalysisException] {
+ sql("ALTER TABLE t ALTER COLUMN i COMMENT 'comment'")
+ }
+ checkError(
+ exception = e,
+ errorClass = "CANNOT_ALTER_PARTITION_COLUMN",
+ sqlState = "428FR",
+ parameters = Map("tableName" -> "`spark_catalog`.`default`.`t`",
+ "columnName" -> "`i`"))
Review Comment:
```suggestion
checkError(
exception = intercept[AnalysisException] {
sql("ALTER TABLE t ALTER COLUMN i COMMENT 'comment'")
},
errorClass = "CANNOT_ALTER_PARTITION_COLUMN",
sqlState = "428FR",
parameters = Map("tableName" -> "`spark_catalog`.`default`.`t`",
"columnName" -> "`i`"))
```
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