Examples of com.foundationdb.server.types.texpressions.TPreparedExpression.evaluateConstant()

        }


        @Override
        public ValueSource next() {
            TPreparedExpression expression = expressions.next();
            TPreptimeValue ptv = expression.evaluateConstant(context);
            assert ptv != null && ptv.value() != null
                    : "not constant: " + expression + " with prepare-time value of " + ptv;
            return ptv.value();
        }


    public ConstantExpression evalNow(PlanContext planContext, ExpressionNode node) {
        if (node instanceof ConstantExpression)
            return (ConstantExpression)node;
        TPreparedExpression expr = assembleExpression(node, null, null);
        TPreptimeValue preptimeValue = expr.evaluateConstant(planContext.getQueryContext());
        if (preptimeValue == null)
            throw new AkibanInternalException("required constant expression: " + expr);
        ValueSource valueSource = preptimeValue.value();
        if (valueSource == null)
            throw new AkibanInternalException("required constant expression: " + expr);

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