代碼塊中的合成錯誤

Question

我遇到了這個我無法解決的合成錯誤;

grunt> describe x; 
x: {id: int,b: {(first: int,second: int)}} 

grunt> res = foreach x {f = FLATTEN(b); generate id,f;} 
2013-07-22 12:28:53,050 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1200: <line 11, column 21> Syntax error, unexpected symbol at or near 'FLATTEN' 

我該怎麼做？

Answer 1

見http://pig.apache.org/docs/r0.11.0/basic.html#foreach

只有CROSS，DISTINCT，FILTER，FOREACH，限制和ORDER BY被允許在嵌套塊。

嘗試

res = FOREACH x GENERATE id, FLATTEN(b.(first, second));