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https://issues.apache.org/jira/browse/PIG-770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12700441#action_12700441
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George Mavromatis commented on PIG-770:
---------------------------------------
I can no longer reproduce it either!
I am wondering if the error messages were coming from other lines in the script
.
I'll let this ticket open for some more days, just to make sure that no other
variation of it exists, and if not I'll close it.
> Parsing errors with FOREACH a GENERATE FLATTEN(urlContents) AS
> --------------------------------------------------------------
>
> Key: PIG-770
> URL: https://issues.apache.org/jira/browse/PIG-770
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.2.0
> Reporter: George Mavromatis
>
> Loading the 2 following as:
> urlContents = LOAD '$input' USING BinStorage() AS (url:chararray,
> pg:bytearray);
> siteUrls = LOAD '$siteUrls' AS (site:chararray, score:double,
> expanded_site:chararray, url:bytearray);
> then the following:
> urlContentsByUrl = FOREACH a GENERATE FLATTEN(urlContents) AS (url:chararray,
> pg:chararray),
> FLATTEN(siteUrls.(site, expanded_site));
> works as expected.
> But all the rest fail with an error message that does not make sense (to me)
> urlContentsByUrl = FOREACH a GENERATE FLATTEN(urlContents) AS (url:chararray,
> pg:chararray),
> FLATTEN(siteUrls.site);
> 2009-04-17 23:18:02,064 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
> 1000: Error during parsing. Invalid alias: siteUrls::site in {url:
> chararray,pg: chararray,site: chararray}
> urlContentsByUrl = FOREACH a GENERATE FLATTEN(urlContents) AS (url:chararray,
> pg:chararray),
> FLATTEN(siteUrls.(site));
> 2009-04-17 23:19:27,669 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
> 1000: Error during parsing. Invalid alias: siteUrls::site in {url:
> chararray,pg: chararray,site: chararray}
> urlContentsByUrl = FOREACH a GENERATE FLATTEN(urlContents) AS (url:chararray,
> pg:chararray),
> FLATTEN(siteUrls.(site,expanded_site))
> AS (site:chararray,expanded_site:chararray);
> 2009-04-17 23:23:33,483 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
> 1000: Error during parsing. Invalid alias: siteUrls::site in {url:
> chararray,pg: chararray,site: chararray,expanded_site: chararray}
> Even if I do not use the AS correctly with FLATTEN, then all or none of the
> above should parse, so either way this is a parsing bug.
> Note that in the pig latin spec page, there is no formal description of
> FLATTEN operation and no example where it is used with GENERATE, AS and a bag
> of more than one tuples, so really I can't know if my above syntax is
> supported, but try and guess. Should I file a separate ticket on that?
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