Question

我自己在学猪，我遇到了一个错误。

这是用宏脚本编写的，用于理解Pig中的模块化编程。问题是我试图通过引用关系名称::使用$来使用字符串参数，然后立即使用$替换参数字符串。错误是：

意外字符$

如何继续这个？

define dividend_analysis (daily, year, daily_symbol, daily_open, daily_close)
returns analyzed {
        divs = load '/PigData1/NYSE_dividends.txt'as (exchange:chararray, symbol:chararray, date:chararray, dividends:float);
        divisthisyear = filter divs by date matches '$year-.*';
        dailythisyear = filter $daily by date matches '$year-.*';
        jnd = join divisthisyear by symbol, dailythisyear by $daily_symbol;
        $analyzed     = foreach jnd generate dailythisyear.$daily_symbol,$daily_close - $daily_open;
};
daily = load '/PigData1/NYSE_daily.txt'as (exchange:chararray, symbol:chararray, date:chararray, open:float, high:float, low:float, close:float, volume:int, adj_close:float);
results = dividend_analysis(daily, '2009', 'symbol', 'open', 'close');

错误信息来自猪......

<line 7, column 53>  Unexpected character '$'
2016-12-09 16:14:04,283 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1200: <line 7, column 53>  Unexpected character '$'
Details at logfile: /home/hadoop/pig_1481278051535.log
grunt> exec macro1.pig
<line 7, column 53>  Unexpected character '$'
2016-12-09 17:00:37,723 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1200: <line 7, column 53>  Unexpected character '$'
Details at logfile: /home/hadoop/pig_1481278051535.log

Answer 1

以下是针对您的脚本所做的更改，请尝试使用此脚本

define dividend_analysis (daily, year, daily_symbol, daily_open, daily_close) 
returns analyzed { 
divs = load '/user/data/NYSE_dividends'as (exchange:chararray,    symbol:chararray, date:chararray, dividends:float); 
divisthisyear = filter divs by date matches '.*$year.*';
dailythisyear = filter $daily by date matches '.*$year.*'; 
jnd = join divisthisyear by symbol, dailythisyear by $daily_symbol;
$analyzed = foreach jnd generate $1 ,$daily_close - $daily_open; };
daily = load '/user/data/NYSE_daily'as (exchange:chararray, symbol:chararray,     date:chararray, open:float, high:float, low:float, close:float, volume:int, adj_close:float); 
results = dividend_analysis(daily, '2009', 'symbol', 'open', 'close');

使用宏选项执行Apache pig脚本时出错

1 个答案: