imay commented on a change in pull request #246: Colocate Join (#245)
URL: https://github.com/apache/incubator-doris/pull/246#discussion_r231435731
 
 

 ##########
 File path: fe/src/main/java/org/apache/doris/catalog/Catalog.java
 ##########
 @@ -3376,12 +3477,36 @@ private Table createOlapTable(Database db, 
CreateTableStmt stmt, boolean isResto
                 if (!db.createTableWithLock(olapTable, false, 
stmt.isSetIfNotExists())) {
                     
ErrorReport.reportDdlException(ErrorCode.ERR_CANT_CREATE_TABLE, tableName, 
"table already exists");
                 }
+
+                //we have added these index to memory, only need to persist 
here
+                if (olapTable.getColocateTable() != null) {
+                    Long groupId = 
db.getTable(olapTable.getColocateTable()).getId();
+                    ColocatePersistInfo info = 
ColocatePersistInfo.CreateForAddTable(tableId, groupId, db.getId());
+                    editLog.logColocateAddTable(info);
+
+                    if 
(getColocateTableIndex().isColocateParentTable(tableId)) {
+                        List<List<Long>> backendsPerBucketSeq = 
getColocateTableIndex().getBackendsPerBucketSeq(groupId);
+                        info = 
ColocatePersistInfo.CreateForBackendsPerBucketSeq(groupId, 
backendsPerBucketSeq);
+                        editLog.logColocateBackendsPerBucketSeq(info);
+                    }
 
 Review comment:
   It's bad to write two logs for one operation. 
   
   If second log failed, first log can't rollback, and this maybe lead to wrong 
system status

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