cloud-fan commented on a change in pull request #30089:
URL: https://github.com/apache/spark/pull/30089#discussion_r509948969
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File path:
external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/v2/V2JDBCTest.scala
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@@ -55,7 +55,54 @@ trait V2JDBCTest extends SharedSparkSession {
assert(msg.contains("Table not found"))
}
- test("SPARK-33034: ALTER TABLE ... update column type") {
+ test("ALTER TABLE ... rename column") {
+ withTable(s"$catalogName.alt_table") {
+ sql(s"CREATE TABLE $catalogName.alt_table (id INTEGER, C0 INTEGER) USING
_")
+ sql(s"ALTER TABLE $catalogName.alt_table RENAME COLUMN id TO C")
+ val t = spark.table(s"$catalogName.alt_table")
+ val expectedSchema = catalogName match {
+ case "oracle" => new StructType().add("C", DecimalType(10,
0)).add("C0", DecimalType(10, 0))
+ case _ => new StructType().add("C", IntegerType).add("C0", IntegerType)
+ }
+ assert(t.schema === expectedSchema)
+ // Rename to already existing column
+ val msg = intercept[AnalysisException] {
+ sql(s"ALTER TABLE $catalogName.alt_table RENAME COLUMN C TO C0")
+ }.getMessage
+ assert(msg.contains("Cannot rename column, because C0 already exists"))
+ }
+ // Rename a column in a not existing table
+ val msg = intercept[AnalysisException] {
+ sql(s"ALTER TABLE $catalogName.not_existing_table RENAME COLUMN ID TO C")
+ }.getMessage
+ assert(msg.contains("Table not found"))
+ }
+
+ test("ALTER TABLE ... drop column") {
+ withTable(s"$catalogName.alt_table") {
+ sql(s"CREATE TABLE $catalogName.alt_table (C1 INTEGER, C2 INTEGER, c3
INTEGER) USING _")
+ sql(s"ALTER TABLE $catalogName.alt_table DROP COLUMN C1")
+ sql(s"ALTER TABLE $catalogName.alt_table DROP COLUMN c3")
+ val t = spark.table(s"$catalogName.alt_table")
+ val expectedSchema = catalogName match {
+ case "oracle" => new StructType().add("C2", DecimalType(10, 0))
Review comment:
what happens in Oracle?
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