Dmitry Lychagin created ASTERIXDB-2952:
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             Summary: Add support for CROSS JOIN
                 Key: ASTERIXDB-2952
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2952
             Project: Apache AsterixDB
          Issue Type: Improvement
          Components: COMP - Compiler
    Affects Versions: 0.9.7
            Reporter: Dmitry Lychagin
            Assignee: Dmitry Lychagin
             Fix For: 0.9.8


We need to add support for CROSS JOIN, by extending JoinStep as follows: 

JoinStep ::= ( ("INNER" | ( ( "LEFT" | "RIGHT" ) "OUTER"?))? "JOIN" NamedExpr 
"ON" Expr ) |  ( "CROSS" "JOIN" NamedExpr )






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