This package contains MetaMatrix query language objects representing parts of the SQL language accepted by MetaMatrix.

For instance, a SQL query such as SELECT * FROM Table WHERE a = 5 would be represented with the following objects (represented here as tree, where indentation implies a reference):

Query object                    Text representation
------------                    -------------------
Query                           SELECT
    Select			
        AllSymbol		*
    From			FROM
        UnaryFromClause
            GroupSymbol		table
    CompareCriteria
        ElementSymbol		a
        Constant		5

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