Examples with RexNodeConverter org.apache.hadoop.hive.ql.optimizer.calcite.translator.RexNodeConverter used on opensource projects

Example 1 with RexNodeConverter

use of org.apache.hadoop.hive.ql.optimizer.calcite.translator.RexNodeConverter in project hive by apache.

the class HiveRexExecutorImpl method reduce.

@Override
public void reduce(RexBuilder rexBuilder, List<RexNode> constExps, List<RexNode> reducedValues) {
    RexNodeConverter rexNodeConverter = new RexNodeConverter(cluster);
    for (RexNode rexNode : constExps) {
        // initialize the converter
        ExprNodeConverter converter = new ExprNodeConverter("", null, null, null, new HashSet<Integer>(), cluster.getTypeFactory());
        // convert RexNode to ExprNodeGenericFuncDesc
        ExprNodeDesc expr = rexNode.accept(converter);
        if (expr instanceof ExprNodeGenericFuncDesc) {
            // folding the constant
            ExprNodeDesc constant = ConstantPropagateProcFactory.foldExpr((ExprNodeGenericFuncDesc) expr);
            if (constant != null) {
                try {
                    // convert constant back to RexNode
                    reducedValues.add(rexNodeConverter.convert((ExprNodeConstantDesc) constant));
                } catch (Exception e) {
                    LOG.warn(e.getMessage());
                    reducedValues.add(rexNode);
                }
            } else {
                reducedValues.add(rexNode);
            }
        } else {
            reducedValues.add(rexNode);
        }
    }
}