gatorsmile commented on a change in pull request #23516: [SPARK-26598] Fix
HiveThriftServer2 set hiveconf and hivevar in every sql
URL: https://github.com/apache/spark/pull/23516#discussion_r247371784
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File path:
sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/server/SparkSQLOperationManager.scala
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@@ -51,9 +50,6 @@ private[thriftserver] class SparkSQLOperationManager()
require(sqlContext != null, s"Session handle:
${parentSession.getSessionHandle} has not been" +
s" initialized or had already closed.")
val conf = sqlContext.sessionState.conf
- val hiveSessionState = parentSession.getSessionState
- setConfMap(conf, hiveSessionState.getOverriddenConfigurations)
- setConfMap(conf, hiveSessionState.getHiveVariables)
Review comment:
Based on the definition of
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+VariableSubstitution#LanguageManualVariableSubstitution-SubstitutionDuringQueryConstruction
, the variable is replaced when building the query. This change could
introduce the behavior changes. What is the major motivation to make this
change?
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