[enhancement](Nereids) check multiple distinct functions that cannot be transformed into muti_distinct#21626

Merged

morrySnow merged 1 commit intoapache:masterfrom keanji-x:check_multi_distinct

Jul 24, 2023

+69

Commits on Jul 20, 2023

Multiple distinct aggregate functions that cannot be transformed into multi_distinct will result in an error.
keanji-x
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