Examples of UnboundExpression

org.datanucleus.store.rdbms.sql.expression.UnboundExpression
Representation of an expression for an unbound variable. This is used where we have a variable in use in a query and at the point of needing it we haven't yet bound the variable. For example, in the following query
```
this.names.contains(var) && var == someValue
```
in the first clause the "var" is unbound when passing in to the InvokeExpression, so it is passed in as an UnboundExpression, and in that contains() method will be bound to the collection (element) table (a join added).

Examples of org.datanucleus.store.rdbms.sql.expression.UnboundExpression

        else
        {
            // Variable never met before, so return as UnboundExpression - process later if needing binding
            NucleusLogger.QUERY.debug(">> QueryToSQL.processVariable (unbound) variable=" + varName +
                " is not yet bound so returning UnboundExpression");
            UnboundExpression unbExpr = new UnboundExpression(stmt, varName);
            stack.push(unbExpr);
            return unbExpr;
        }
    }

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