Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/15024#discussion_r78475247
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveExternalCatalog.scala ---
@@ -410,15 +417,22 @@ private[spark] class HiveExternalCatalog(conf:
SparkConf, hadoopConf: Configurat
if (DDLUtils.isDatasourceTable(withStatsProps)) {
val oldDef = client.getTable(db, withStatsProps.identifier.table)
- // Sets the `schema`, `partitionColumnNames` and `bucketSpec` from
the old table definition,
- // to retain the spark specific format if it is. Also add old data
source properties to table
- // properties, to retain the data source table format.
- val oldDataSourceProps =
oldDef.properties.filter(_._1.startsWith(DATASOURCE_PREFIX))
+ // get the data source properties from old table definition, and add
the new location entry.
+ val dataSourceProps =
oldDef.properties.filter(_._1.startsWith(DATASOURCE_PREFIX)) ++
+ tableDefinition.storage.locationUri.map { location =>
+ DATASOURCE_LOCATION -> location
+ }
val newDef = withStatsProps.copy(
+ // TODO: we may break the hive-compatibility format for location
URI here, we should follow
+ // `createTable` and try to alter the table with `locationUri`
set, if it's failed, then set
--- End diff --
However, Hive normally does not return exceptions immediately. After
incorrectly altering the table, we could get an exception when reading/writing
this table. For example, we set the `locationUri` to `None` for a Hive managed
table. We will hit an error when inserting the data into this table. When we
drop the Hive-managed table, Hive should delete the directory pointed by
`locationUri`. Then, if it is `None`, the directory will not be dropped.
---
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