[pick](nereids) using mv's derived stats (#35721) #37098
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for a given mv, we have 2 stats. one is generated by stats analyzer, which is accurate, another is derived stats, which is derived when optimizer runs the mv query. If a query tree contains a mv, we will use the mv's derived stats to derive stats for the whole tree. (cherry picked from commit a481d79)
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for a given mv, we have 2 stats. one is generated by stats analyzer, which is accurate, another is derived stats, which is derived when optimizer runs the mv query.
If a query tree contains a mv, we will use the mv's derived stats to derive stats for the whole tree.
(cherry picked from commit a481d79)
Proposed changes
Issue Number: close #xxx