[Fix](variant) filter with variant access may lead to to parition/tab…

[eldenmoon]

…let prune fall through (#32560)

Query like select * from ut_p partitions(p2) where cast(var['a'] as int) > 0 will fall through parition/tablet prunning since it's plan like

mysql> explain analyzed plan select * from ut_p where id = 3 and cast(var['a'] as int) = 789;
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Explain String(Nereids Planner)                                                                                                                                            |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| LogicalResultSink[26] ( outputExprs=[id#0, var#1] )                                                                                                                        |
| +--LogicalProject[25] ( distinct=false, projects=[id#0, var#1], excepts=[] )                                                                                               |
|    +--LogicalFilter[24] ( predicates=((cast(var#4 as INT) = 789) AND (id#0 = 3)) )                                                                                         |
|       +--LogicalFilter[23] ( predicates=(0 = __DORIS_DELETE_SIGN__#2) )                                                                                                    |
|          +--LogicalProject[22] ( distinct=false, projects=[id#0, var#1, __DORIS_DELETE_SIGN__#2, __DORIS_VERSION_COL__#3, element_at(var#1, 'a') AS `var`#4], excepts=[] ) |
|             +--LogicalOlapScan ( qualified=regression_test_variant_p0.ut_p, indexName=<index_not_selected>, selectedIndexId=10145, preAgg=ON )                             |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
6 rows in set (0.01 sec)

with an extra LogicalProject on top of LogicalOlapScan, so we should handle such case to prune parition/tablet

Proposed changes

Issue Number: close #xxx

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[doris-robot]

Thank you for your contribution to Apache Doris.
Don't know what should be done next? See How to process your PR

Since 2024-03-18, the Document has been moved to doris-website.
See Doris Document.