代码块中的合成错误

Question

我遇到了这个我无法解决的合成错误;

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' 

我该怎么做？

Answer 1

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

只有CROSS，DISTINCT，FILTER，FOREACH，限制和ORDER BY被允许在嵌套块。

尝试

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