[GitHub] [incubator-doris] BiteTheDDDDt commented on pull request #6526: [BUG]Join query result is unstable when the predicate is pushed down to exchange node

[GitBox <gi...@apache.org>]

BiteTheDDDDt commented on pull request #6526:
URL: https://github.com/apache/incubator-doris/pull/6526#issuecomment-909937505


   ```cpp
   Status ExprContext::prepare(RuntimeState* state, const RowDescriptor& row_desc,
                               const std::shared_ptr<MemTracker>& tracker) {
       _prepared = true;
       ...
   }
   
   Status ExprContext::open(RuntimeState* state) {
       DCHECK(_prepared);
       ...
   }
   ```
   Maybe you can refer to the `ExprContext` method to avoid repeatedly calling prepare by mistake?


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