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https://issues.apache.org/jira/browse/PIG-2535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13217853#comment-13217853
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Thejas M Nair commented on PIG-2535:
------------------------------------
+1
> Bug in new logical plan results in no output for join
> -----------------------------------------------------
>
> Key: PIG-2535
> URL: https://issues.apache.org/jira/browse/PIG-2535
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.8.1, 0.9.1, 0.10
> Reporter: Vivek Padmanabhan
> Attachments: PIG-2535-0.patch, PIG-2535-1.patch
>
>
> The below script is a snippet of a much larger script. The join in the script
> results in 0 output for Pig 0.8,0.9 and 0.10 though there are matching
> records.
> {code}
> event_serve = LOAD 'input1' USING MyMapLoader() AS (s:map[], m:map[],
> l:map[]);
> raw = LOAD 'input2' USING MyMapLoader() AS (s:map[], m:map[], l:map[]);
> SPLIT raw INTO
> serve_raw IF (( (chararray) (s#'type') == '0') AND ( (chararray)
> (s#'source') == '5')),
> cm_click_raw IF (( (chararray) (s#'type') == '1') AND ( (chararray)
> (s#'source') == '5'));
> cm_serve = FOREACH serve_raw GENERATE s#'cm_serve_id' AS cm_event_guid,
> s#'cm_serve_timestamp_ms' AS cm_receive_time, s#'p_url' AS ctx ;
> cm_serve_lowercase = stream cm_serve through `tr [:upper:] [:lower:]`;
> cm_serve_final = FOREACH cm_serve_lowercase GENERATE $0 AS cm_event_guid, $1
> AS cm_receive_time, $2 AS ctx;
> filtered = FILTER event_serve BY (chararray) (s#'filter_key') neq 'xxxx' AND
> (chararray) (s#'filter_key') neq 'yyyy';
> event_serve_project = FOREACH filtered GENERATE s#'event_guid' AS event_guid,
> s#'receive_time' AS receive_time;
> event_serve_join = join cm_serve_final by (cm_event_guid, cm_receive_time),
> event_serve_project by (event_guid, receive_time) PARALLEL 800;
> STORE event_serve_join INTO 'output' ;
> {code}
> The script produces correct results if I disable ColumnMapKeyPrune optimizer.
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