TAJO-1183: Keep command execution even with errors

tajo-client/src/main/java/org/apache/tajo/cli/tsql/TajoCli.java

@@ -390,7 +390,7 @@ private String updatePrompt(ParsingState state) throws ServiceException {
   public int runShell() throws Exception {
     String line;
     String currentPrompt = context.getCurrentDatabase();
-    int exitCode = 0;
+    int exitCode;
 
     sout.write("Try \\? for help.\n");
 
@@ -416,7 +416,7 @@ public int runShell() throws Exception {
           exitCode = executeParsedResults(parsedResults);
           currentPrompt = updatePrompt(parser.getState());
 
-          if (exitCode != 0 && context.getBool(SessionVars.ON_ERROR_STOP)) {
+          if (exitCode != 0) {
             return exitCode;
           }
         }
@@ -430,24 +430,24 @@ public int runShell() throws Exception {
 
       throw e;
     }
-    return exitCode;
+    return 0;
   }
 
   private int executeParsedResults(Collection<ParsedResult> parsedResults) throws Exception {
-    int exitCode = 0;
+    int exitCode;
     for (ParsedResult parsedResult : parsedResults) {
       if (parsedResult.getType() == META) {
         exitCode = executeMetaCommand(parsedResult.getStatement());
       } else {
         exitCode = executeQuery(parsedResult.getStatement());
       }
 
-      if (exitCode != 0) {
+      if (exitCode != 0 && context.getBool(SessionVars.ON_ERROR_STOP)) {
         return exitCode;
       }
     }
 
-    return exitCode;
+    return 0;
   }
 
   public int executeMetaCommand(String line) throws Exception {