morningman commented on a change in pull request #1566: Add switch for cost 
optimization
URL: https://github.com/apache/incubator-doris/pull/1566#discussion_r310417280
 
 

 ##########
 File path: fe/src/main/java/org/apache/doris/analysis/SelectStmt.java
 ##########
 @@ -379,8 +379,17 @@ public void analyze(Analyzer analyzer) throws 
AnalysisException, UserException {
         if (needToSql) {
             sqlString_ = toSql();
         }
-        reorderTable(analyzer);
 
+        if 
(!analyzer.getContext().getSessionVariable().isDisableCostOptimization()) {
+            reorderTable(analyzer);
+            if (fromClause_.getTableRefs().size() > 1) {
+                final StringBuilder logBuilder = new StringBuilder("Tables 
order:");
+                for (TableRef tableRef : fromClause_.getTableRefs()) {
+                    logBuilder.append(" ").append(tableRef.getAlias());
+                }
+                LOG.info(logBuilder.toString());
 
 Review comment:
   ```suggestion
                   LOG.debug(logBuilder.toString());
   ```

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