sunchao commented on a change in pull request #33382:
URL: https://github.com/apache/spark/pull/33382#discussion_r679355859



##########
File path: 
sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveShim.scala
##########
@@ -876,29 +876,24 @@ private[client] class Shim_v0_13 extends Shim_v0_12 {
       } else {
         logDebug(s"Hive metastore filter is '$filter'.")
         val tryDirectSqlConfVar = HiveConf.ConfVars.METASTORE_TRY_DIRECT_SQL
-        // We should get this config value from the metaStore. otherwise hit 
SPARK-18681.
-        // To be compatible with hive-0.12 and hive-0.13, In the future we can 
achieve this by:
-        // val tryDirectSql = 
hive.getMetaConf(tryDirectSqlConfVar.varname).toBoolean
-        val tryDirectSql = 
hive.getMSC.getConfigValue(tryDirectSqlConfVar.varname,
-          tryDirectSqlConfVar.defaultBoolVal.toString).toBoolean
         try {
           // Hive may throw an exception when calling this method in some 
circumstances, such as
           // when filtering on a non-string partition column when the hive 
config key
-          // hive.metastore.try.direct.sql is false
+          // hive.metastore.try.direct.sql is false. In some cases the remote 
metastore will throw
+          // exceptions even if the config is true, due to various reasons 
including the
+          // underlying RDBMS, Hive bugs when generating the filter, etc. For 
this reason we
+          // always fallback to use `Hive.getAllPartitionsOf` here when the 
exception happens.
           getPartitionsByFilterMethod.invoke(hive, table, filter)
             .asInstanceOf[JArrayList[Partition]]
         } catch {
-          case ex: InvocationTargetException if 
ex.getCause.isInstanceOf[MetaException] &&
-              !tryDirectSql =>
+          case ex: InvocationTargetException if 
ex.getCause.isInstanceOf[MetaException] =>
             logWarning("Caught Hive MetaException attempting to get partition 
metadata by " +
               "filter from Hive. Falling back to fetching all partition 
metadata, which will " +

Review comment:
       @cloud-fan updated the PR with this approach. Let me know what you think.




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