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jirapos...@reviews.apache.org commented on PIG-2167: ---------------------------------------------------- ----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: https://reviews.apache.org/r/4670/ ----------------------------------------------------------- (Updated 2012-04-30 04:05:03.466616) Review request for pig and Dmitriy Ryaboy. Changes ------- Updated JIRA issue field to reflect just the issue number. Summary ------- This is a review board for https://issues.apache.org/jira/browse/PIG-2167 This addresses bug PIG-2167. https://issues.apache.org/jira/browse/PIG-2167 Diffs ----- http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/newplan/logical/optimizer/AllExpressionVisitor.java 1325115 http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/newplan/logical/optimizer/SchemaResetter.java 1325115 http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/newplan/logical/relational/LOCube.java PRE-CREATION http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/newplan/logical/relational/LogicalRelationalNodesVisitor.java 1325115 http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/newplan/logical/visitor/ProjectStarExpander.java 1325115 http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/parser/AliasMasker.g 1325115 http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/parser/AstPrinter.g 1325115 http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/parser/AstValidator.g 1325115 http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/parser/LogicalPlanBuilder.java 1325115 http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/parser/LogicalPlanGenerator.g 1325115 http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/parser/QueryLexer.g 1325115 http://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/parser/QueryParser.g 1325115 http://svn.apache.org/repos/asf/pig/trunk/test/org/apache/pig/parser/TestLexer.pig 1325115 http://svn.apache.org/repos/asf/pig/trunk/test/org/apache/pig/parser/TestLogicalPlanGenerator.java 1325115 http://svn.apache.org/repos/asf/pig/trunk/test/org/apache/pig/parser/TestParser.pig 1325115 http://svn.apache.org/repos/asf/pig/trunk/test/org/apache/pig/parser/TestQueryLexer.java 1325115 http://svn.apache.org/repos/asf/pig/trunk/test/org/apache/pig/parser/TestQueryParser.java 1325115 http://svn.apache.org/repos/asf/pig/trunk/test/org/apache/pig/test/TestCubeOperator.java PRE-CREATION Diff: https://reviews.apache.org/r/4670/diff Testing ------- Unit tests: All passed Pre-commit tests: All passed ant clean test-commit Thanks, Prasanth_J > CUBE operation in Pig > --------------------- > > Key: PIG-2167 > URL: https://issues.apache.org/jira/browse/PIG-2167 > Project: Pig > Issue Type: New Feature > Reporter: Dmitriy V. Ryaboy > Assignee: Dmitriy V. Ryaboy > Labels: gsoc2012, mentor > Attachments: PIG-2167.1.patch, PIG-2167.2.patch, > Pig-Cubing-Performance.png > > > Computing aggregates over a cube of several dimensions is a common operation > in data warehousing. > The standard SQL syntax is "GROUP relation BY dim1, dim2, dim3 WITH CUBE" -- > which in addition to all dim1-2-3, produces aggregations for just dim1, just > dim1 and dim2, etc. NULL is generally used to represent "all". > A presentation by Arnab Nandi describes how one might implement efficient > cubing in Map-Reduce here: http://pdf.cx/44wrk > We can start with the naive solution which only works for algebraic measures, > and work up from there. > This is a candidate project for Google summer of code 2012. More information > about the program can be found at > https://cwiki.apache.org/confluence/display/PIG/GSoc2012 -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira