[GitHub] [spark] dh20 commented on a change in pull request #31030: [SPARK-34006][SQL][DOC] Add descriptions about `spark.sql.hive.convertMetastoreOrc` in the SQL documents

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dh20 commented on a change in pull request #31030:
URL: https://github.com/apache/spark/pull/31030#discussion_r551822676



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File path: sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveUtils.scala
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@@ -130,7 +130,10 @@ private[spark] object HiveUtils extends Logging {
 
   val CONVERT_METASTORE_ORC = buildConf("spark.sql.hive.convertMetastoreOrc")
     .doc("When set to true, the built-in ORC reader and writer are used to process " +
-      "ORC tables created by using the HiveQL syntax, instead of Hive serde.")
+      "ORC tables created by using the HiveQL syntax, instead of Hive serde." +
+      "Enabling this parameter will cause insert overwrite when reading the table," +
+      "and the file format of this table is ORC This error will be thrown[], " +

Review comment:
       @HyukjinKwon When I query an orc format hive table and overwrite the query result into this orc table, sparksql will throw this error -> [org.apache.spark.sql.AnalysisException: Cannot overwrite a path that is also being read from], when I set this parameter to false, Hql will execute normally




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