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Functions
- #arg
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- $(d)dql...
- $(db)sql;…
- ${macroExp}
- =expression
- >statement
- [a:b]
- @
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- ~( i )
- A()
- A.( x,... )
- [a1,...an]
- abs()
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- align()
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- dynadb.close()
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- dyna_open()
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- E()
- E()
- elapse()
- elasticnet()
- end s
- enum()
- env()
- eq()
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- es_close()
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- es_head()
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- exec()
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- exists()
- exp()
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- eye()
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- Faccrint()
- Faccrintm()
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- false
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- Fdb()
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- fetch()
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- file()
- filename()
- fill()
- fillcons()
- fillfun()
- fillmthd()
- find()
- Fintrate()
- finv()
- Firr()
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- Fnper()
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- for
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- freq ()
- Fsln()
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- func()
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- get()
- gcd()
- gcs_bucket()
- gcs_close()
- gcs_copy()
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- goto C
- group()
- groupc()
- groupi()
- groupn()
- groups()
- groupx()
- hash()
- hbase_close()
- hbase_cmp()
- hbase_filter()
- hbase_filterlist()
- hbase_get()
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- hbase_rest()
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- hdfs_open()
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- hdfs_dir()
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- hive_open()
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- hive_cursor()
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- I()
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- import()
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- index()
- inf()
- influx_close()
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- ln()
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- m()
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- makimamthd()
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- memory()
- merge()
- mergex()
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- mi()
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- millisecond()
- min()
- minp()
- minute()
- mmean()
- mnorm()
- mode()
- modify()
- mongo_close()
- mongo_open()
- mongo_shell()
- month()
- movefile()
- movmthd()
- mul()
- mse()
- mstd()
- msum()
- mvp()
- n.f(x)
- name()
- new()
- news()
- next{a}
- nodes()
- norm()
- norminv()
- not()
- now()
- ntile()
- null
- number()
- numnorm()
- nvl()
- o()
- olap_close()
- olap_open()
- olap_query()
- ones()
- open()
- or()
- oss_bucket()
- oss_close()
- oss_copy()
- oss_file()
- oss_list()
- oss_open()
- output()
- p()
- pad()
- parse()
- paste()
- pca()
- pchipmthd()
- pdate()
- pearson()
- penum()
- periods()
- permut()
- pfind()
- pi()
- pivot()
- pjoin()
- pls()
- pmax()
- pmin()
- polyfit()
- pos()
- power()
- prior()
- proc()
- product()
- proportion()
- property()
- pseg()
- pselect()
- pseudo()
- psort()
- ptop()
- push()
- Qconnect()
- Qdirectory()
- Qenv()
- Qfile()
- Qload()
- Qlock()
- Qmove()
- query()
- r.(x,...)
- r.F
- r.F=x
- r2dbc_close()
- r2dbc_exec()
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- r2dbc_query()
- rand()
- rands()
- range()
- rank()
- ranki()
- rankm()
- ranks()
- read()
- record()
- redis_close()
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- regex()
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- remainder()
- rename()
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- report_config()
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- reportlite_open()
- reportlite_run()
- reset()
- result
- return xi
- rgb()
- ridge()
- right()
- rmmiss()
- rmmissdim()
- rollback()
- round()
- rsa()
- run()
- rvs()
- s3_bucket()
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- s3_file()
- s3_list()
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- sap_client()
- sap_close()
- sap_cursor()
- sap_execute()
- sap_getparam()
- sap_table()
- savepoint()
- sbs()
- se()
- second()
- segp()
- select()
- seq()
- sert()
- setenum()
- sf_close()
- sf_open()
- sf_query()
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- shift()
- sign()
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- size()
- skew()
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- smooth()
- sort()
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- spark_open()
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- spark_read()
- spearman()
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- split()
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- sqlparse()
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- sqrt()
- step()
- string()
- structure
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- svm()
- swap()
- switch()
- syncfile(hs,p)
- system()
- T()
- tarcorskew()
- tan()
- tanh()
- time()
- tinv()
- to()
- top()
- total()
- transpose()
- trim()
- true
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- ttest_p()
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- update()
- upper()
- urlencode()
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- v()
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- var(V)
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- was_bucket()
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- web_crawl()
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- workday()
- workdays()
- write()
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- xjoin()
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- xlscell()
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- xml()
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- year()
- ym2_close()
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- ym2_pcfload()
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- zeros()
- zip()
- zip_add()
- zip_close()
- zip_compress()
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- Intersection of sequences
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prior()
Here’s how to use prior() function.
r. prior()
Description：
Among the records, query fields referred by the foreign key recursively.
Syntax:
r.prior(F,r',n)
Note：
The function recursively queries field F referred by the foreign key, like [r,r. F, r. F. F,…] in record r. The query will not stop until the value of field F is equal to r'. When r is equal to r' , then return [].The default value of r' is NULL. The recursive query will be performed through all the records to the end. If the specified record r' does not exist, then return NULL. n is the maximum recursion depth, its value is 1,000 by default.
Parameter：
|
r |
Records |
|
F |
Field name |
|
r' |
A record |
|
n |
A Number |
Return value：
Sequence
Example：
|
|
A |
|
|
1 |
=file("D://emp.txt").import@t().keys(empid) |
|
|
2 |
>A1.switch(mgrid,A1:empid) |
|
|
3 |
=A1.select@1(name=="Kitty").prior(mgrid) |
Based on mgrid field referred by the foreign key, select all records of people who are superior to Kitty. |
|
4 |
=A1.select@1(name=="Kitty").prior(mgrid,A1.select@1(name=="Tiger"),5) |
Judge if Tiger is superior to Kitty and list all records of people superior to Barnes but inferior to Tiger. |
