Exemplo n.º 1
0
        public static IList <string> GetIndexProperties(QueryGraph graph, int lookup, int indexed)
        {
            QueryGraphValue val = graph.GetGraphValue(lookup, indexed);
            QueryGraphValuePairHashKeyIndex pair = val.HashKeyProps;

            return(pair.Indexed);
        }
Exemplo n.º 2
0
        public static SubordPropPlan GetJoinProps(ExprNode filterExpr, int outsideStreamCount, EventType[] allStreamTypesZeroIndexed, ExcludePlanHint excludePlanHint)
        {
            // No filter expression means full table scan
            if (filterExpr == null)
            {
                return(new SubordPropPlan());
            }

            // analyze query graph
            var queryGraph = new QueryGraph(outsideStreamCount + 1, excludePlanHint, true);

            FilterExprAnalyzer.Analyze(filterExpr, queryGraph, false);

            // Build a list of streams and indexes
            var joinProps  = new LinkedHashMap <String, SubordPropHashKey>();
            var rangeProps = new LinkedHashMap <String, SubordPropRangeKey>();

            for (int stream = 0; stream < outsideStreamCount; stream++)
            {
                int lookupStream = stream + 1;

                QueryGraphValue queryGraphValue = queryGraph.GetGraphValue(lookupStream, 0);
                QueryGraphValuePairHashKeyIndex hashKeysAndIndexes = queryGraphValue.HashKeyProps;

                // handle key-lookups
                var keyPropertiesJoin   = hashKeysAndIndexes.Keys;
                var indexPropertiesJoin = hashKeysAndIndexes.Indexed;
                if (keyPropertiesJoin.IsNotEmpty())
                {
                    if (keyPropertiesJoin.Count != indexPropertiesJoin.Count)
                    {
                        throw new IllegalStateException("Invalid query key and index property collection for stream " + stream);
                    }

                    for (int i = 0; i < keyPropertiesJoin.Count; i++)
                    {
                        QueryGraphValueEntryHashKeyed keyDesc = keyPropertiesJoin[i];
                        ExprNode compareNode = keyDesc.KeyExpr;

                        var keyPropType     = compareNode.ExprEvaluator.ReturnType.GetBoxedType();
                        var indexedPropType = allStreamTypesZeroIndexed[0].GetPropertyType(indexPropertiesJoin[i]).GetBoxedType();
                        var coercionType    = indexedPropType;
                        if (keyPropType != indexedPropType)
                        {
                            coercionType = keyPropType.GetCompareToCoercionType(indexedPropType);
                        }

                        SubordPropHashKey desc;
                        if (keyPropertiesJoin[i] is QueryGraphValueEntryHashKeyedExpr)
                        {
                            var keyExpr      = (QueryGraphValueEntryHashKeyedExpr)keyPropertiesJoin[i];
                            var keyStreamNum = keyExpr.IsRequiresKey ? stream : (int?)null;
                            desc = new SubordPropHashKey(keyDesc, keyStreamNum, coercionType);
                        }
                        else
                        {
                            var prop = (QueryGraphValueEntryHashKeyedProp)keyDesc;
                            desc = new SubordPropHashKey(prop, stream, coercionType);
                        }
                        joinProps.Put(indexPropertiesJoin[i], desc);
                    }
                }

                // handle range lookups
                QueryGraphValuePairRangeIndex rangeKeysAndIndexes = queryGraphValue.RangeProps;
                var rangeIndexes = rangeKeysAndIndexes.Indexed;
                var rangeDescs   = rangeKeysAndIndexes.Keys;
                if (rangeDescs.IsEmpty())
                {
                    continue;
                }

                // get all ranges lookups
                int count = -1;
                foreach (QueryGraphValueEntryRange rangeDesc in rangeDescs)
                {
                    count++;
                    String rangeIndexProp = rangeIndexes[count];

                    SubordPropRangeKey subqRangeDesc = rangeProps.Get(rangeIndexProp);

                    // other streams may specify the start or end endpoint of a range, therefore this operation can be additive
                    if (subqRangeDesc != null)
                    {
                        if (subqRangeDesc.RangeInfo.RangeType.IsRange())
                        {
                            continue;
                        }

                        // see if we can make this additive by using a range
                        var relOpOther = (QueryGraphValueEntryRangeRelOp)subqRangeDesc.RangeInfo;
                        var relOpThis  = (QueryGraphValueEntryRangeRelOp)rangeDesc;

                        QueryGraphRangeConsolidateDesc opsDesc = QueryGraphRangeUtil.GetCanConsolidate(
                            relOpThis.RangeType,
                            relOpOther.RangeType);
                        if (opsDesc != null)
                        {
                            ExprNode start;
                            ExprNode end;
                            if (!opsDesc.IsReverse)
                            {
                                start = relOpOther.Expression;
                                end   = relOpThis.Expression;
                            }
                            else
                            {
                                start = relOpThis.Expression;
                                end   = relOpOther.Expression;
                            }
                            var allowRangeReversal = relOpOther.IsBetweenPart && relOpThis.IsBetweenPart;
                            var rangeIn            = new QueryGraphValueEntryRangeIn(opsDesc.RangeType, start, end, allowRangeReversal);

                            var indexedPropType = allStreamTypesZeroIndexed[0].GetPropertyType(rangeIndexProp).GetBoxedType();
                            var coercionType    = indexedPropType;
                            var proposedType    = CoercionUtil.GetCoercionTypeRangeIn(indexedPropType, rangeIn.ExprStart, rangeIn.ExprEnd);
                            if (proposedType != null && proposedType != indexedPropType)
                            {
                                coercionType = proposedType;
                            }

                            subqRangeDesc = new SubordPropRangeKey(rangeIn, coercionType);
                            rangeProps.Put(rangeIndexProp, subqRangeDesc);
                        }
                        // ignore
                        continue;
                    }

                    // an existing entry has not been found
                    if (rangeDesc.RangeType.IsRange())
                    {
                        var rangeIn         = (QueryGraphValueEntryRangeIn)rangeDesc;
                        var indexedPropType = allStreamTypesZeroIndexed[0].GetPropertyType(rangeIndexProp).GetBoxedType();
                        var coercionType    = indexedPropType;
                        var proposedType    = CoercionUtil.GetCoercionTypeRangeIn(indexedPropType, rangeIn.ExprStart, rangeIn.ExprEnd);
                        if (proposedType != null && proposedType != indexedPropType)
                        {
                            coercionType = proposedType;
                        }
                        subqRangeDesc = new SubordPropRangeKey(rangeDesc, coercionType);
                    }
                    else
                    {
                        var relOp           = (QueryGraphValueEntryRangeRelOp)rangeDesc;
                        var keyPropType     = relOp.Expression.ExprEvaluator.ReturnType;
                        var indexedPropType = allStreamTypesZeroIndexed[0].GetPropertyType(rangeIndexProp).GetBoxedType();
                        var coercionType    = indexedPropType;
                        if (keyPropType != indexedPropType)
                        {
                            coercionType = keyPropType.GetCompareToCoercionType(indexedPropType);
                        }
                        subqRangeDesc = new SubordPropRangeKey(rangeDesc, coercionType);
                    }
                    rangeProps.Put(rangeIndexProp, subqRangeDesc);
                }
            }

            SubordPropInKeywordSingleIndex inKeywordSingleIdxProp = null;
            SubordPropInKeywordMultiIndex  inKeywordMultiIdxProp  = null;

            if (joinProps.IsEmpty() && rangeProps.IsEmpty())
            {
                for (int stream = 0; stream < outsideStreamCount; stream++)
                {
                    int             lookupStream    = stream + 1;
                    QueryGraphValue queryGraphValue = queryGraph.GetGraphValue(lookupStream, 0);

                    QueryGraphValuePairInKWSingleIdx inkwSingles = queryGraphValue.InKeywordSingles;
                    if (inkwSingles.Indexed.Length != 0)
                    {
                        ExprNode[] keys = inkwSingles.Key[0].KeyExprs;
                        String     key  = inkwSingles.Indexed[0];
                        if (inKeywordSingleIdxProp != null)
                        {
                            continue;
                        }
                        var coercionType = keys[0].ExprEvaluator.ReturnType;  // for in-comparison the same type is required
                        inKeywordSingleIdxProp = new SubordPropInKeywordSingleIndex(key, coercionType, keys);
                    }

                    IList <QueryGraphValuePairInKWMultiIdx> inkwMultis = queryGraphValue.InKeywordMulti;
                    if (!inkwMultis.IsEmpty())
                    {
                        QueryGraphValuePairInKWMultiIdx multi = inkwMultis[0];
                        inKeywordMultiIdxProp = new SubordPropInKeywordMultiIndex(ExprNodeUtility.GetIdentResolvedPropertyNames(multi.Indexed), multi.Indexed[0].ExprEvaluator.ReturnType, multi.Key.KeyExpr);
                    }

                    if (inKeywordSingleIdxProp != null && inKeywordMultiIdxProp != null)
                    {
                        inKeywordMultiIdxProp = null;
                    }
                }
            }

            return(new SubordPropPlan(joinProps, rangeProps, inKeywordSingleIdxProp, inKeywordMultiIdxProp));
        }