zhoubintao ad949c2f65 Optimize Hex and add related Doc (#6697) ...

I tested hex in a 1000w times for loop with random numbers，
old hex avg time cost is 4.92 s，optimize hex avg time cost is 0.46 s which faster nearly 10x.

2021-10-13 11:36:14 +08:00

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sql-functions

Optimize Hex and add related Doc (#6697)

2021-10-13 11:36:14 +08:00

sql-statements

[AliasFunction] Add support for cast in alias function (#6754)

2021-10-10 23:05:44 +08:00