4b5cea1ef8
[enhancement](fix)change ordinary type null value is \N,complex type null value is null ( #24207 )
2023-09-16 21:46:42 +08:00
268c867679
[Improve](serde)replace function_cast from_string to serde ( #24087 )
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Now we can not support streamload with column which is map/array nested map/array
serde can do this now , so we can replace it
Notice. if item data in complex type data is empty we just return error, instead of makeup default value , because now we can not define right default for complex type
2023-09-14 13:53:16 +08:00
1d05feea1b
[Feature](Nereids) add executable function to support fold constant for functions ( #18209 )
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1. Add date-time functions for fold constant for Nereids.
This is the list of executable date-time function nereids supports up to now:
- now()
- now(int)
- current_timestamp()
- current_timestamp(int)
- localtime()
- localtimestamp()
- curdate()
- current_date()
- curtime()
- current_time()
- date_{add/sub}(),{years/months/days/hours/minutes/seconds}_{add/sub}()
- datediff()
- {date/datev2}()
- {year/quarter/month/day/hour/minute/second}()
- dayof{year/month/week}()
- date_format()
- date_trunc()
- from_days()
- last_day()
- to_monday()
- from_unixtime()
- unix_timestamp()
- utc_timestamp()
- to_date()
- to_days()
- str_to_date()
- makedate()
2. solved problem:
- enable datev2/datetimev2 default.
- refactor Nereids foldConstantOnFE and support fold nested expression.
- separate the executable into multi-files for easily-reading and adding new functions
2023-05-17 21:26:31 +08:00
b6f2dfa994
[test](Nereids) add not nullable test for scalar functions ( #16498 )
2023-02-16 11:57:19 +08:00
