heguanhui opened a new pull request, #64185:
URL: https://github.com/apache/doris/pull/64185

   ### What problem does this PR solve?
   
   Issue Number: close #64184
   
   Related PR: #
   
   Problem Summary: The BE unit test `ColumnComplexTest.GetDataAtTest` fails 
because `get_data_at()` for `ColumnBitmap`, `ColumnHll`, and 
`ColumnQuantileState` returns raw binary data that includes uninitialized 
padding bytes, causing comparison failures even when the actual data values are 
equal.
   
   The fix replaces `get_data_at()` comparisons with 
`get_element().to_string()` for bitmap/hll columns and `operator[]` for 
quantile_state column, which compare logical values instead of raw binary 
representations.
   
   ### Release note
   
   None
   
   ### Check List (For Author)
   
   - Test
       - [x] Unit Test
   
   - Behavior changed:
       - [x] No.
   
   - Does this need documentation?
       - [x] No.


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