Pig 中似乎有什么错误？

Question

我正在尝试读取 pig 中的文件。

A = load 'dataviz/TOP500_201511.csv' using  PigStorage(',') as (Rank:int , Previous Rank:int,
First Appearance:int, First Rank:int, Name:chararray,Computer:chararray,Site:chararray,
Manufacturer:chararray,Country:chararray,Year:int,Segment:chararray,Total Cores:int,
Accelerator/Co-Processor Cores:int,Rmax:int,Rpeak:int,Nmax:int,Nhalf:int,Power:int,
Mflops/Watt:int,Architecture:chararray,Processor:chararray,Processor Technology:chararray,
Processor Speed (MHz):int,Operating System:chararray,OS Family:chararray,
Accelerator/Co-Processor:int,Cores per Socket::chararray,Processor Generation:chararray,
System Model:chararray,System Family:chararray,Interconnect Family:chararray,
Interconnect:chararray,Region:chararray,Continent:chararray);

但我收到一个奇怪的错误。

2016-02-06 21:19:50,213 [uber-SubtaskRunner] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1200: mismatched input 'Rank' expecting RIGHT_PAREN

请帮忙。

Answer 1

我们不能有多词字段名称。而不是按名称的字段：以前的排名（多字）将其设置为 prv_rank 或任何名称，只要它是有效的标识符即可。对于其他字段名称也是如此。

参考 : https://pig.apache.org/docs/r0.11.0/basic.html#Data+Types+and+More

Identifiers Identifiers include the names of relations (aliases), fields, variables, and so on. In Pig, identifiers start with a letter and can be followed by any number of letters, digits, or underscores.

Valid identifiers:

A A123 abc_123_BeX_

Invalid identifiers:

A123 abc$ A!B

Pig 中似乎有什么错误？

What seems to be error here in Pig?

csv

apache-pig