Examples of com.salesforce.phoenix.expression.Expression.evaluate()

Package com.salesforce.phoenix.expression

Class com.salesforce.phoenix.expression.Expression

Examples of com.salesforce.phoenix.expression.Expression.evaluate()

com.salesforce.phoenix.expression.Expression.evaluate()
Access the value by setting a pointer to it (as opposed to making a copy of it which can be expensive) @param tuple Single row result during scan iteration @param ptr Pointer to byte value being accessed @return true if the expression could be evaluated (i.e. ptr was set)and false otherwise

    }
    
    @Override
    public boolean evaluate(Tuple tuple, ImmutableBytesWritable ptr) {
        Expression child = children.get(0);
        if (!child.evaluate(tuple, ptr)) {
            return false;
        }
        if (ptr.getLength() == 0) {
            return true;
        }

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        // Can't parse if there is no replacement pattern.
        if (pattern == null) {
            return false;
        }
        Expression sourceStrExpression = getSourceStrExpression();
        if (!sourceStrExpression.evaluate(tuple, ptr)) {
            return false;
        }
        String sourceStr = (String)PDataType.VARCHAR.toObject(ptr, sourceStrExpression.getColumnModifier());
        if (sourceStr == null) {
            return false;

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            return false;
        }
        String replaceStr;
        if (hasReplaceStr) {
            Expression replaceStrExpression = this.getReplaceStrExpression();
            if (!replaceStrExpression.evaluate(tuple, ptr)) {
                return false;
            }
            replaceStr = (String)PDataType.VARCHAR.toObject(ptr, replaceStrExpression.getColumnModifier());
        } else {
            replaceStr = "";

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        Expression expression = node.create(children, context);
        ImmutableBytesWritable ptr = context.getTempPtr();
        if (node.isStateless()) {
            Object value = null;
            PDataType type = expression.getDataType();
            if (expression.evaluate(null, ptr)) {
                value = type.toObject(ptr);
            }
            return LiteralExpression.newConstant(value, type, expression.isDeterministic());
        }
        boolean isDeterministic = true;

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            // returning null. We have to wait until after we create the function expression so that
            // we can get the proper type to use.
            if (node.evalToNullIfParamIsNull(context, i)) {
                Expression child = children.get(i);
                isDeterministic &= child.isDeterministic();
                if (child.isStateless() && (!child.evaluate(null, ptr) || ptr.getLength() == 0)) {
                    return LiteralExpression.newConstant(null, expression.getDataType(), isDeterministic);
                }
            }
        }
        expression = addExpression(expression);

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            }
        }
        Expression expression = new LikeExpression(children);
        if (node.isStateless()) {
            ImmutableBytesWritable ptr = context.getTempPtr();
            if (!expression.evaluate(null, ptr)) {
                return LiteralExpression.newConstant(null, expression.isDeterministic());
            } else {
                return LiteralExpression.newConstant(Boolean.TRUE.equals(PDataType.BOOLEAN.toObject(ptr)) ^ node.isNegate(), expression.isDeterministic());
            }
        }

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        ImmutableBytesWritable ptr = context.getTempPtr();
        // Can't use child.isConstant(), because we have cases in which we don't know
        // in advance if a function evaluates to null (namely when bind variables are used)
        // TODO: use child.isStateless
        if (child.isStateless()) {
            if (!child.evaluate(null, ptr) || ptr.getLength() == 0) {
                return LiteralExpression.newConstant(null, PDataType.BOOLEAN, child.isDeterministic());
            }
            return LiteralExpression.newConstant(!(Boolean)PDataType.BOOLEAN.toObject(ptr), PDataType.BOOLEAN, child.isDeterministic());
        }
        return new NotExpression(child);

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            ParseNode childNode = node.getChildren().get(i);
            if (childNode instanceof BindParseNode) {
                context.getBindManager().addParamMetaData((BindParseNode)childNode, firstChild);
            }
        }
        if (firstChildNode.isStateless() && firstChild.evaluate(null, ptr) && ptr.getLength() == 0) {
            return LiteralExpression.newConstant(null, PDataType.BOOLEAN, firstChild.isDeterministic());
        }
        
        Expression e = InListExpression.create(inChildren, ptr);
        if (node.isNegate()) {

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        Expression e = InListExpression.create(inChildren, ptr);
        if (node.isNegate()) {
            e = new NotExpression(e);
        }
        if (node.isStateless()) {
            if (!e.evaluate(null, ptr) || ptr.getLength() == 0) {
                return LiteralExpression.newConstant(null, e.getDataType(), e.isDeterministic());
            }
            Object value = e.getDataType().toObject(ptr);
            return LiteralExpression.newConstant(value, e.getDataType(), e.isDeterministic());
        }

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        ImmutableBytesWritable ptr = context.getTempPtr();


        // If all children are literals, just evaluate now
        if (expression.isStateless()) {
            if (!expression.evaluate(null,ptr) || ptr.getLength() == 0) {
                return LiteralExpression.newConstant(null, expression.getDataType(), expression.isDeterministic());
            }
            return LiteralExpression.newConstant(expression.getDataType().toObject(ptr), expression.getDataType(), expression.isDeterministic());
        } else if (isNull) {
            return LiteralExpression.newConstant(null, expression.getDataType(), expression.isDeterministic());

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