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

Example 66 with RexInputRef

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

the class DrillRelOptUtil method analyzeSimpleEquiJoin.

/**
 * Returns whether the join condition is a simple equi-join or not. A simple equi-join is
 * defined as an two-table equality join (no self-join)
 * @param join input join
 * @param joinFieldOrdinals join field ordinal w.r.t. the underlying inputs to the join
 * @return TRUE if the join is a simple equi-join (not a self-join), FALSE otherwise
 */
public static boolean analyzeSimpleEquiJoin(Join join, int[] joinFieldOrdinals) {
    RexNode joinExp = join.getCondition();
    if (joinExp.getKind() != SqlKind.EQUALS) {
        return false;
    } else {
        RexCall binaryExpression = (RexCall) joinExp;
        RexNode leftComparand = binaryExpression.operands.get(0);
        RexNode rightComparand = binaryExpression.operands.get(1);
        if (!(leftComparand instanceof RexInputRef)) {
            return false;
        } else if (!(rightComparand instanceof RexInputRef)) {
            return false;
        } else {
            int leftFieldCount = join.getLeft().getRowType().getFieldCount();
            int rightFieldCount = join.getRight().getRowType().getFieldCount();
            RexInputRef leftFieldAccess = (RexInputRef) leftComparand;
            RexInputRef rightFieldAccess = (RexInputRef) rightComparand;
            if (leftFieldAccess.getIndex() >= leftFieldCount + rightFieldCount || rightFieldAccess.getIndex() >= leftFieldCount + rightFieldCount) {
                return false;
            }
            /* Both columns reference same table */
            if ((leftFieldAccess.getIndex() >= leftFieldCount && rightFieldAccess.getIndex() >= leftFieldCount) || (leftFieldAccess.getIndex() < leftFieldCount && rightFieldAccess.getIndex() < leftFieldCount)) {
                return false;
            } else {
                if (leftFieldAccess.getIndex() < leftFieldCount) {
                    joinFieldOrdinals[0] = leftFieldAccess.getIndex();
                    joinFieldOrdinals[1] = rightFieldAccess.getIndex() - leftFieldCount;
                } else {
                    joinFieldOrdinals[0] = rightFieldAccess.getIndex();
                    joinFieldOrdinals[1] = leftFieldAccess.getIndex() - leftFieldCount;
                }
                return true;
            }
        }
    }
}

Example 67 with RexInputRef

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

the class DrillProjectRelBase method getSimpleFieldCount.

private int getSimpleFieldCount() {
    int cnt = 0;
    final ComplexFieldWithNamedSegmentIdentifier complexFieldIdentifer = new ComplexFieldWithNamedSegmentIdentifier();
    // a + b, a * 10 + b, etc are not simple fields, since they are expressions.
    for (RexNode expr : this.getProjects()) {
        if (expr instanceof RexInputRef) {
            // Simple Field reference.
            cnt++;
        } else if (expr instanceof RexCall && expr.accept(complexFieldIdentifer)) {
            // Complex field with named segments only.
            cnt++;
        }
    }
    return cnt;
}

Example 68 with RexInputRef

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

the class DrillRelOptUtil method containIdentity.

/**
 * Returns whether the leading edge of a given array of expressions is
 * wholly {@link RexInputRef} objects with types and names corresponding
 * to the underlying row type.
 */
private static boolean containIdentity(List<? extends RexNode> exps, RelDataType rowType, RelDataType childRowType) {
    List<RelDataTypeField> fields = rowType.getFieldList();
    List<RelDataTypeField> childFields = childRowType.getFieldList();
    int fieldCount = childFields.size();
    if (exps.size() != fieldCount) {
        return false;
    }
    for (int i = 0; i < exps.size(); i++) {
        RexNode exp = exps.get(i);
        if (!(exp instanceof RexInputRef)) {
            return false;
        }
        RexInputRef var = (RexInputRef) exp;
        if (var.getIndex() != i) {
            return false;
        }
        if (!fields.get(i).getName().equals(childFields.get(i).getName())) {
            return false;
        }
        if (!fields.get(i).getType().equals(childFields.get(i).getType())) {
            return false;
        }
    }
    return true;
}

Example 69 with RexInputRef

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

the class DrillRelMdSelectivity method findRexInputRef.

private static RexInputRef findRexInputRef(final RexNode node) {
    try {
        RexVisitor<Void> visitor = new RexVisitorImpl<Void>(true) {

            @Override
            public Void visitCall(RexCall call) {
                for (RexNode child : call.getOperands()) {
                    child.accept(this);
                }
                return super.visitCall(call);
            }

            @Override
            public Void visitInputRef(RexInputRef inputRef) {
                throw new Util.FoundOne(inputRef);
            }
        };
        node.accept(visitor);
        return null;
    } catch (Util.FoundOne e) {
        Util.swallow(e, null);
        return (RexInputRef) e.getNode();
    }
}

Example 70 with RexInputRef

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

the class FieldsReWriterUtil method getFieldNameFromItemStarField.

/**
 * Checks if operator call is using item star field.
 * Will return field name if true. null otherwise.
 *
 * @param rexCall operator call
 * @param fieldNames list of field names
 * @return field name, null otherwise
 */
public static String getFieldNameFromItemStarField(RexCall rexCall, List<String> fieldNames) {
    if (!SqlStdOperatorTable.ITEM.equals(rexCall.getOperator())) {
        return null;
    }
    if (rexCall.getOperands().size() != 2) {
        return null;
    }
    if (!(rexCall.getOperands().get(0) instanceof RexInputRef && rexCall.getOperands().get(1) instanceof RexLiteral)) {
        return null;
    }
    // get parent field reference from the first operand (ITEM($0, 'col_name' -> $0)
    // and check if it corresponds to the dynamic star
    RexInputRef rexInputRef = (RexInputRef) rexCall.getOperands().get(0);
    String parentFieldName = fieldNames.get(rexInputRef.getIndex());
    if (!SchemaPath.DYNAMIC_STAR.equals(parentFieldName)) {
        return null;
    }
    // get field name from the second operand (ITEM($0, 'col_name') -> col_name)
    RexLiteral rexLiteral = (RexLiteral) rexCall.getOperands().get(1);
    if (SqlTypeName.CHAR.equals(rexLiteral.getType().getSqlTypeName())) {
        return RexLiteral.stringValue(rexLiteral);
    }
    return null;
}