Examples with RelDataTypeField org.apache.calcite.rel.type.RelDataTypeField used on opensource projects

Example 66 with RelDataTypeField

use of org.apache.calcite.rel.type.RelDataTypeField in project drill by apache.

the class StarColumnConverter method visitScan.

@Override
public Prel visitScan(ScanPrel scanPrel, Void value) throws RuntimeException {
    if (StarColumnHelper.containsStarColumn(scanPrel.getRowType()) && prefixedForStar) {
        List<RexNode> exprs = Lists.newArrayList();
        for (RelDataTypeField field : scanPrel.getRowType().getFieldList()) {
            RexNode expr = scanPrel.getCluster().getRexBuilder().makeInputRef(field.getType(), field.getIndex());
            exprs.add(expr);
        }
        List<String> fieldNames = Lists.newArrayList();
        long tableId = tableNumber.getAndIncrement();
        for (String name : scanPrel.getRowType().getFieldNames()) {
            if (StarColumnHelper.isNonPrefixedStarColumn(name)) {
                // Add prefix to * column.
                fieldNames.add("T" + tableId + StarColumnHelper.PREFIX_DELIMITER + name);
            } else {
                // Keep regular column as it is.
                fieldNames.add(name);
            }
        }
        RelDataType rowType = RexUtil.createStructType(scanPrel.getCluster().getTypeFactory(), exprs, fieldNames);
        // insert a PAS.
        ProjectPrel proj = new ProjectPrel(scanPrel.getCluster(), scanPrel.getTraitSet(), scanPrel, exprs, rowType);
        return proj;
    } else {
        return visitPrel(scanPrel, value);
    }
}

Example 67 with RelDataTypeField

use of org.apache.calcite.rel.type.RelDataTypeField in project drill by apache.

the class RewriteProjectToFlatten method visitProject.

@Override
public Prel visitProject(ProjectPrel node, Object unused) throws RelConversionException {
    ProjectPrel project = node;
    List<RexNode> exprList = new ArrayList<>();
    boolean rewrite = false;
    List<RelDataTypeField> relDataTypes = new ArrayList<>();
    int i = 0;
    RexNode flatttenExpr = null;
    for (RexNode rex : project.getChildExps()) {
        RexNode newExpr = rex;
        if (rex instanceof RexCall) {
            RexCall function = (RexCall) rex;
            String functionName = function.getOperator().getName();
            if (functionName.equalsIgnoreCase("flatten")) {
                rewrite = true;
                if (function.getOperands().size() != 1) {
                    throw new RelConversionException("Flatten expression expects a single input.");
                }
                newExpr = function.getOperands().get(0);
                RexBuilder builder = new RexBuilder(factory);
                flatttenExpr = builder.makeInputRef(new RelDataTypeDrillImpl(new RelDataTypeHolder(), factory), i);
            }
        }
        relDataTypes.add(project.getRowType().getFieldList().get(i));
        i++;
        exprList.add(newExpr);
    }
    if (rewrite == true) {
        // TODO - figure out what is the right setting for the traits
        Prel newChild = ((Prel) project.getInput(0)).accept(this, null);
        ProjectPrel newProject = new ProjectPrel(node.getCluster(), project.getTraitSet(), newChild, exprList, new RelRecordType(relDataTypes));
        FlattenPrel flatten = new FlattenPrel(project.getCluster(), project.getTraitSet(), newProject, flatttenExpr);
        return flatten;
    }
    Prel child = ((Prel) project.getInput()).accept(this, null);
    return (Prel) project.copy(project.getTraitSet(), child, exprList, new RelRecordType(relDataTypes));
}

Example 68 with RelDataTypeField

use of org.apache.calcite.rel.type.RelDataTypeField in project lucene-solr by apache.

the class SolrSort method implement.

public void implement(Implementor implementor) {
    implementor.visitChild(0, getInput());
    List<RelFieldCollation> sortCollations = collation.getFieldCollations();
    if (!sortCollations.isEmpty()) {
        // Construct a series of order clauses from the desired collation
        final List<RelDataTypeField> fields = getRowType().getFieldList();
        for (RelFieldCollation fieldCollation : sortCollations) {
            final String name = fields.get(fieldCollation.getFieldIndex()).getName();
            String direction = "asc";
            if (fieldCollation.getDirection().equals(RelFieldCollation.Direction.DESCENDING)) {
                direction = "desc";
            }
            implementor.addOrder(name, direction);
        }
    }
    if (fetch != null) {
        implementor.setLimit(((RexLiteral) fetch).getValue().toString());
    }
}