In `org.apache.spark.sql.hive.HiveExternalCatalogSuite`
`
test("SPARK-31061: alterTable should be able to change table provider")
{
val catalog = newBasicCatalog()
val parquetTable = CatalogTable(
identifier = TableIdentifier("parq_tbl", Some("db1")),
tableType = CatalogTableType.MANAGED,
storage = storageFormat.copy(locationUri = Some(new URI("file:/some/path"))),
schema = new StructType().add("col1", "int").add("col2", "string"),
provider = Some("parquet"))
catalog.createTable(parquetTable, ignoreIfExists = false)
val rawTable = externalCatalog.getTable("db1", "parq_tbl")
assert(rawTable.provider === Some("parquet"))
val fooTable = *parquetTable*.copy(provider = Some("foo")) <- `*parquetTable*` seems should be rawTable
catalog.alterTable(fooTable)
val alteredTable = externalCatalog.getTable("db1", "parq_tbl")
assert(alteredTable.provider === Some("foo"))
}
test("SPARK-31061: alterTable should be able to change table provider from hive")
{
val catalog = newBasicCatalog()
val hiveTable = CatalogTable(
identifier = TableIdentifier("parq_tbl", Some("db1")),
tableType = CatalogTableType.MANAGED,
storage = storageFormat,
schema = new StructType().add("col1", "int").add("col2", "string"),
provider = Some("hive"))
catalog.createTable(hiveTable, ignoreIfExists = false)
val rawTable = externalCatalog.getTable("db1", "parq_tbl")
assert(rawTable.provider === Some("hive"))
val fooTable = rawTable.copy(provider = Some("foo"))
catalog.alterTable(fooTable)
val alteredTable = externalCatalog.getTable("db1", "parq_tbl")
assert(alteredTable.provider === Some("foo"))
}
`
Test
Major 
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