Examples with RecordTypeKeyExpression com.apple.foundationdb.record.metadata.expressions.RecordTypeKeyExpression used on opensource projects

Example 1 with RecordTypeKeyExpression

use of com.apple.foundationdb.record.metadata.expressions.RecordTypeKeyExpression in project fdb-record-layer by FoundationDB.

the class RecordQueryPlanner method planFieldWithComparison.

@Nullable
private ScoredPlan planFieldWithComparison(@Nonnull CandidateScan candidateScan, @Nonnull KeyExpression indexExpr, @Nonnull FieldWithComparison singleField, @Nullable KeyExpression sort, boolean fullKey) {
    final Comparisons.Comparison comparison = singleField.getComparison();
    final ScanComparisons scanComparisons = ScanComparisons.from(comparison);
    if (scanComparisons == null) {
        // this index, but this should be handled elsewhere by the planner.
        return null;
    }
    if (indexExpr instanceof FieldKeyExpression) {
        FieldKeyExpression field = (FieldKeyExpression) indexExpr;
        if (Objects.equals(singleField.getFieldName(), field.getFieldName())) {
            if (sort != null) {
                if (sort instanceof FieldKeyExpression) {
                    FieldKeyExpression sortField = (FieldKeyExpression) sort;
                    if (Objects.equals(sortField.getFieldName(), field.getFieldName())) {
                        // everything matches, yay!! Hopefully that comparison can be for tuples
                        return new ScoredPlan(1, valueScan(candidateScan, scanComparisons, fullKey));
                    }
                }
            } else {
                return new ScoredPlan(1, valueScan(candidateScan, scanComparisons, false));
            }
        }
        return null;
    } else if (indexExpr instanceof ThenKeyExpression) {
        ThenKeyExpression then = (ThenKeyExpression) indexExpr;
        if ((sort == null || sort.equals(then.getChildren().get(0))) && !then.createsDuplicates() && !(then.getChildren().get(0) instanceof RecordTypeKeyExpression)) {
            // First column will do it all or not.
            return planFieldWithComparison(candidateScan, then.getChildren().get(0), singleField, sort, false);
        } else {
            // May need second column to do sort, so handle like And, which does such cases.
            return new AndWithThenPlanner(candidateScan, then, Collections.singletonList(singleField), sort).plan();
        }
    }
    return null;
}