morningman commented on a change in pull request #5620:
URL: https://github.com/apache/incubator-doris/pull/5620#discussion_r613087692
##########
File path: fe/fe-core/src/main/java/org/apache/doris/qe/VariableMgr.java
##########
@@ -102,6 +103,11 @@
public static final int READ_ONLY = 8;
// Variables with this flag can not be seen with `SHOW VARIABLES`
statement.
public static final int INVISIBLE = 16;
+ // session origin value
+ private static final Map<Field,String> sessionOriginValue;
Review comment:
```suggestion
private static final Map<Field, String> sessionOriginValue;
```
##########
File path: fe/fe-core/src/main/java/org/apache/doris/qe/StmtExecutor.java
##########
@@ -253,7 +253,10 @@ public void execute() throws Exception {
// Exception:
// IOException: talk with client failed.
public void execute(TUniqueId queryId) throws Exception {
-
+ // origin value init
+ VariableMgr.setIsSingleSetVar(false);
+ VariableMgr.clearMapSessionOriginValue();
Review comment:
So `isSingleSetVar` and `sessionOriginValue` should be set in
`SessionVariables` instance.
##########
File path: fe/fe-core/src/main/java/org/apache/doris/qe/VariableMgr.java
##########
@@ -118,6 +124,7 @@
// Form map from variable name to its field in Java class.
static {
+ sessionOriginValue = new HashMap<Field,String>();
Review comment:
```suggestion
sessionOriginValue = new HashMap<Field, String>();
```
##########
File path: fe/fe-core/src/main/java/org/apache/doris/qe/StmtExecutor.java
##########
@@ -253,7 +253,10 @@ public void execute() throws Exception {
// Exception:
// IOException: talk with client failed.
public void execute(TUniqueId queryId) throws Exception {
-
+ // origin value init
+ VariableMgr.setIsSingleSetVar(false);
+ VariableMgr.clearMapSessionOriginValue();
Review comment:
VariableMgr is a thread safe class.
But `execute()` can be called by multi threads
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