Examples with RexInputRef org.apache.calcite.rex.RexInputRef used on opensource projects

Example 56 with RexInputRef

use of org.apache.calcite.rex.RexInputRef in project calcite by apache.

the class DruidQuery method extractColumnName.

/**
 * @param rexNode Druid input ref node
 * @param rowType rowType
 * @param query Druid Query
 *
 * @return Druid column name or null when not possible to translate.
 */
@Nullable
protected static String extractColumnName(RexNode rexNode, RelDataType rowType, DruidQuery query) {
    if (rexNode.getKind() == SqlKind.INPUT_REF) {
        final RexInputRef ref = (RexInputRef) rexNode;
        final String columnName = rowType.getFieldNames().get(ref.getIndex());
        if (columnName == null) {
            return null;
        }
        // calcite has this un-direct renaming of timestampFieldName to native druid `__time`
        if (query.getDruidTable().timestampFieldName.equals(columnName)) {
            return DruidTable.DEFAULT_TIMESTAMP_COLUMN;
        }
        return columnName;
    }
    return null;
}

Example 57 with RexInputRef

use of org.apache.calcite.rex.RexInputRef in project drill by axbaretto.

the class ConvertHiveParquetScanToDrillParquetScan method createColumnFormatConversion.

/**
 * Apply any data format conversion expressions.
 */
private RexNode createColumnFormatConversion(final DrillScanRel hiveScanRel, final DrillScanRel nativeScanRel, final String colName, final RexBuilder rb) {
    final RelDataType outputType = hiveScanRel.getRowType().getField(colName, false, false).getType();
    final RelDataTypeField inputField = nativeScanRel.getRowType().getField(colName, false, false);
    final RexInputRef inputRef = rb.makeInputRef(inputField.getType(), inputField.getIndex());
    if (outputType.getSqlTypeName() == SqlTypeName.TIMESTAMP) {
        // TODO: Remove this conversion once "store.parquet.reader.int96_as_timestamp" will be true by default
        return rb.makeCall(INT96_TO_TIMESTAMP, inputRef);
    }
    return inputRef;
}

Example 58 with RexInputRef

use of org.apache.calcite.rex.RexInputRef in project drill by axbaretto.

the class DrillFilterItemStarReWriterRule method transformFilterCall.

/**
 * Removes item star call from filter expression and propagates changes into project (if present) and scan.
 *
 * @param filterRel original filter expression
 * @param projectRel original project expression
 * @param scanRel original scan expression
 * @param call original rule call
 */
private static void transformFilterCall(DrillFilterRel filterRel, DrillProjectRel projectRel, DrillScanRel scanRel, RelOptRuleCall call) {
    List<String> fieldNames = projectRel == null ? scanRel.getRowType().getFieldNames() : projectRel.getRowType().getFieldNames();
    ItemStarFieldsVisitor itemStarFieldsVisitor = new ItemStarFieldsVisitor(fieldNames);
    filterRel.getCondition().accept(itemStarFieldsVisitor);
    // if there are no item fields, no need to proceed further
    if (itemStarFieldsVisitor.hasNoItemStarFields()) {
        return;
    }
    Map<String, DesiredField> itemStarFields = itemStarFieldsVisitor.getItemStarFields();
    DrillScanRel newScan = createNewScan(scanRel, itemStarFields);
    // create new project if was present in call
    DrillProjectRel newProject = null;
    if (projectRel != null) {
        // add new projects to the already existing in original project
        int projectIndex = scanRel.getRowType().getFieldCount();
        List<RexNode> newProjects = new ArrayList<>(projectRel.getProjects());
        for (DesiredField desiredField : itemStarFields.values()) {
            newProjects.add(new RexInputRef(projectIndex, desiredField.getType()));
            projectIndex++;
        }
        RelDataType newProjectRowType = createNewRowType(projectRel.getCluster().getTypeFactory(), projectRel.getRowType().getFieldList(), itemStarFields.keySet());
        newProject = new DrillProjectRel(projectRel.getCluster(), projectRel.getTraitSet(), newScan, newProjects, newProjectRowType);
    }
    // transform filter condition
    Map<RexNode, Integer> fieldMapper = createFieldMapper(itemStarFields.values(), scanRel.getRowType().getFieldCount());
    FieldsReWriter fieldsReWriter = new FieldsReWriter(fieldMapper);
    RexNode newCondition = filterRel.getCondition().accept(fieldsReWriter);
    // create new filter
    DrillFilterRel newFilter = DrillFilterRel.create(newProject != null ? newProject : newScan, newCondition);
    // wrap with project to have the same row type as before
    List<RexNode> newProjects = new ArrayList<>();
    RelDataType rowType = filterRel.getRowType();
    List<RelDataTypeField> fieldList = rowType.getFieldList();
    for (RelDataTypeField field : fieldList) {
        RexInputRef inputRef = new RexInputRef(field.getIndex(), field.getType());
        newProjects.add(inputRef);
    }
    DrillProjectRel wrapper = new DrillProjectRel(filterRel.getCluster(), filterRel.getTraitSet(), newFilter, newProjects, filterRel.getRowType());
    call.transformTo(wrapper);
}

Example 59 with RexInputRef

use of org.apache.calcite.rex.RexInputRef in project drill by axbaretto.

the class DrillRelOptUtil method findOperators.

/**
 * Travesal RexNode to find at least one operator in the given collection. Continue search if RexNode has a
 * RexInputRef which refers to a RexNode in project expressions.
 *
 * @param node : RexNode to search
 * @param projExprs : the list of project expressions. Empty list means there is No project operator underneath.
 * @param operators collection of operators to find
 * @return : Return null if there is NONE; return the first appearance of item/flatten RexCall.
 */
public static RexCall findOperators(final RexNode node, final List<RexNode> projExprs, final Collection<String> operators) {
    try {
        RexVisitor<Void> visitor = new RexVisitorImpl<Void>(true) {

            public Void visitCall(RexCall call) {
                if (operators.contains(call.getOperator().getName().toLowerCase())) {
                    throw new Util.FoundOne(call);
                /* throw exception to interrupt tree walk (this is similar to
                                              other utility methods in RexUtil.java */
                }
                return super.visitCall(call);
            }

            public Void visitInputRef(RexInputRef inputRef) {
                if (projExprs.size() == 0) {
                    return super.visitInputRef(inputRef);
                } else {
                    final int index = inputRef.getIndex();
                    RexNode n = projExprs.get(index);
                    if (n instanceof RexCall) {
                        RexCall r = (RexCall) n;
                        if (operators.contains(r.getOperator().getName().toLowerCase())) {
                            throw new Util.FoundOne(r);
                        }
                    }
                    return super.visitInputRef(inputRef);
                }
            }
        };
        node.accept(visitor);
        return null;
    } catch (Util.FoundOne e) {
        Util.swallow(e, null);
        return (RexCall) e.getNode();
    }
}

Example 60 with RexInputRef

use of org.apache.calcite.rex.RexInputRef in project drill by axbaretto.

the class StarColumnConverter method visitProject.

@Override
public Prel visitProject(ProjectPrel prel, Void value) throws RuntimeException {
    ProjectPrel proj = (ProjectPrel) prel;
    // Require prefix rename : there exists other expression, in addition to a star column.
    if (// not set yet.
    !prefixedForStar && StarColumnHelper.containsStarColumnInProject(prel.getInput().getRowType(), proj.getProjects()) && prel.getRowType().getFieldNames().size() > 1) {
        prefixedForStar = true;
    }
    // For project, we need make sure that the project's field name is same as the input,
    // when the project expression is RexInPutRef, since we may insert a PAS which will
    // rename the projected fields.
    RelNode child = ((Prel) prel.getInput(0)).accept(this, null);
    List<String> fieldNames = Lists.newArrayList();
    for (Pair<String, RexNode> pair : Pair.zip(prel.getRowType().getFieldNames(), proj.getProjects())) {
        if (pair.right instanceof RexInputRef) {
            String name = child.getRowType().getFieldNames().get(((RexInputRef) pair.right).getIndex());
            fieldNames.add(name);
        } else {
            fieldNames.add(pair.left);
        }
    }
    // Make sure the field names are unique : no allow of duplicate field names in a rowType.
    fieldNames = makeUniqueNames(fieldNames);
    RelDataType rowType = RexUtil.createStructType(prel.getCluster().getTypeFactory(), proj.getProjects(), fieldNames);
    ProjectPrel newProj = (ProjectPrel) proj.copy(proj.getTraitSet(), child, proj.getProjects(), rowType);
    if (ProjectRemoveRule.isTrivial(newProj)) {
        return (Prel) child;
    } else {
        return newProj;
    }
}