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Function
- #c
- $(db)sql;…
- ${macroExp}
- =expression
- >statement
- [a:b]
- @
- @x:…
- A()
- A. (x,…)
- [a1,…,an]
- abs()
- acos()
- acosh()
- age()
- align()
- ali_ open()
- ali_close()
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- alter()
- and ()
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- argpost
- arguments ()
- array()
- asc ()
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- atanh()
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- bool ()
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- C
- Cr()
- calc()
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- call path/spl( … )
- calls path/spl( … )
- callx()
- cand()
- canvas()
- case()
- ceil()
- cellname()
- ch. ()
- channel()
- char()
- chardetect()
- charencode()
- chi_p ()
- chi2inv()
- chn()
- clear()
- clipboard ()
- close()
- cmp()
- cor ()
- comabs ()
- comangle ()
- combin()
- comconj ()
- comexp ()
- comimage()
- commit()
- compair ()
- complex ()
- comreal ()
- comsign ()
- comstr ()
- comunwrap ()
- concat()
- conj()
- conjx()
- connect()
- contain()
- corskew()
- cos()
- cosh()
- coun t()
- cov()
- covm()
- create()
- cs.()
- cum()
- cursor()
- date()
- datederive()
- dateinterval()
- datetime()
- day()
- days()
- decimal()
- delete()
- deq()
- derive()
- det()
- diff( )
- digits()
- directory()
- dis()
- dism()
- dup()
- dyna.dbclose()
- dynadb.execute ()
- dyna_open()
- dynadb.query()
- dynadb.table ()
- E()
- E()
- elapse()
- elasticnet()
- end s
- enum()
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- es_get ()
- es_post ()
- es_put ()
- execute()
- exists()
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- export()
- eye()
- f@o(…)
- Faccrint()
- Faccrintm()
- fact()
- false
- Fcoupcd()
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- fetch()
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- file()
- filename ()
- fill()
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- fisher_p ()
- float()
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- fname()
- fno()
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- for
- fork
- format()
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- freq ()
- Fsln()
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- ftp_cd()
- ftp_open()
- ftp_close()
- ftp_dir()
- ftp_get()
- ftp_mget()
- ftp_mput()
- ftp_put()
- func()
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- get()
- gcd()
- goto C
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- hash ()
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- influx_open ()
- influx_query ()
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- influx2_open()
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- memory()
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- minute()
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- mnorm()
- mode()
- modify()
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- mongo_shell()
- month()
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- mse()
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- 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()
- output()
- p()
- pad()
- parse()
- paste ()
- pca ()
- pdate ()
- pearson ()
- penum()
- periods()
- permut()
- pfind()
- pi()
- pivot()
- pls ()
- pmax()
- pmin()
- polyfit()
- pos()
- power()
- prior()
- proc()
- product()
- property()
- pseg()
- pselect()
- pseudo()
- psort()
- ptop()
- push()
- query()
- r(T,F)
- r.(x)
- r.F
- r.F=x
- r2dbc_close()
- r2dbc_exec()
- r2dbc_open()
- r2dbc_query()
- rand ()
- rands()
- range()
- rank()
- ranki()
- rankm ()
- ranks()
- read()
- record()
- redis_close ()
- redis_command()
- redis_open ()
- regex()
- register()
- remainder()
- rename()
- replace ()
- report_config()
- report_exportDoc()
- report_exportHtml()
- report_exportPdf()
- report_exportXls()
- report_open()
- report_run()
- reset()
- result
- return xi
- rgb()
- ridge()
- right()
- rollback()
- round()
- row()
- run()
- rvs()
- 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 ()
- sf_wsdlclose ()
- sf_wsdlopen ()
- sf_wsdlquery ()
- sf_wsdlview ()
- sg ()
- shift()
- sign()
- sin()
- sinh()
- size()
- skew ()
- skip()
- sleep()
- smooth()
- sort()
- sortx()
- spark_ open()
- spark_close()
- spark_cursor()
- spark_query()
- spark_read()
- spearman ()
- split()
- splserver()
- sqlparse()
- sqltranslate ()
- substr ()
- stax_close()
- stax_open()
- stax_cursor()
- stax_query()
- sqrt()
- step()
- string()
- sum()
- svm()
- swap()
- switch()
- syncfile(hs,p)
- system()
- T()
- tarcorskew()
- tan()
- tanh()
- time()
- tinv()
- to()
- top()
- total()
- transpose()
- trim()
- true
- try
- ttest_p ()
- union( )
- update()
- upper ()
- urlencode()
- uuid()
- v()
- var()
- web_crawl()
- webhdfs()
- webhdfs_file()
- words()
- workday()
- workdays()
- write()
- ws_call()
- ws_client()
- xjoin()
- xjoinx()
- xlscell()
- xlsclose()
- xlsexport ()
- xlsimport ()
- xlsopen()
- xlswrite()
- xml()
- xor()
- xunion( )
- year()
- ym_build_model()
- ym_close()
- ym_env()
- ym_exec()
- ym_importance ()
- ym_json()
- ym_load_pcf()
- ym_model ()
- ym_performance()
- ym_predict()
- ym_present ()
- ym_result()
- ym_save_pcf()
- ym_setparam()
- ym_server_quit()
- ym_statistics ()
- ym_target ()
- zeros()
- zip()
- zip_add()
- zip_close ()
- zip_compress()
- zip_del()
- zip_encrypt()
- zip_extract()
- zip_open()
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hdfs_open()
描述：
连接hdfs文件系统，返回连接对象hd
语法：
hdfs_open(url,user)
备注：
外部库函数，进行hadoop服务器连接，参数都省略时，需要将hadoop的配置文件放在外部库目录下，此时返回缺省连接。
参数：
|
url |
url格式为：scheme://authority/path scheme为hdfs协议名， authority为主机名,path为文件(或目录)的路径构成的字符串 |
|
user |
hadoop用户，缺省为root |
返回值：
连接对象hd
示例：
|
|
A |
|
|
1 |
=hdfs_open("hdfs://192.168.0.76:9000","root") |
连接hdfs |
|
2 |
=hdfs_open("hdfs://192.168.0.8:9000") |
连接hdfs，参数user省略 |
|
|
=hdfs_open() |
hadoop的配置文件均放在外部库目录下，参数都省略 |