public SubordinateQueryIndexSuggest(
SubordinateQueryIndexDescForge forge,
IList<StmtClassForgeableFactory> multiKeyForgeables)
{
Forge = forge;
MultiKeyForgeables = multiKeyForgeables;
}
public static SubordinateQueryPlan PlanSubquery(
EventType[] outerStreams,
SubordPropPlan joinDesc,
bool isNWOnTrigger,
bool forceTableScan,
IndexHint optionalIndexHint,
bool indexShare,
int subqueryNumber,
bool isVirtualDataWindow,
EventTableIndexMetadata indexMetadata,
ISet<string> optionalUniqueKeyProps,
bool onlyUseExistingIndexes,
EventType eventTypeIndexed,
StatementRawInfo statementRawInfo,
StatementCompileTimeServices services)
{
if (isVirtualDataWindow) {
var indexProps = GetIndexPropDesc(joinDesc.HashProps, joinDesc.RangeProps);
var lookupStrategyFactoryX = new SubordTableLookupStrategyFactoryForgeVDW(
statementRawInfo.StatementName,
statementRawInfo.Annotations,
outerStreams,
indexProps.HashJoinedProps,
new CoercionDesc(false, indexProps.HashIndexCoercionType),
indexProps.RangeJoinedProps,
new CoercionDesc(false, indexProps.RangeIndexCoercionType),
isNWOnTrigger,
joinDesc,
forceTableScan,
indexProps.ListPair);
var forge = new SubordinateQueryPlanDescForge(lookupStrategyFactoryX, null);
return new SubordinateQueryPlan(forge, EmptyList<StmtClassForgeableFactory>.Instance);
}
if (joinDesc.CustomIndexOps != null && !joinDesc.CustomIndexOps.IsEmpty()) {
foreach (var op
in joinDesc.CustomIndexOps) {
foreach (var index in indexMetadata.Indexes) {
if (IsCustomIndexMatch(index, op)) {
var provisionDesc =
index.Value.OptionalQueryPlanIndexItem.AdvancedIndexProvisionDesc;
var lookupStrategyFactoryX =
provisionDesc.Factory.Forge.GetSubordinateLookupStrategy(
op.Key.OperationName,
op.Value.PositionalExpressions,
isNWOnTrigger,
outerStreams.Length);
var provisionCompileTime =
provisionDesc.ToCompileTime(eventTypeIndexed, statementRawInfo, services);
var indexItemForge = new QueryPlanIndexItemForge(
new string[0],
new Type[0],
new string[0],
new Type[0],
false,
provisionCompileTime,
eventTypeIndexed);
var indexDesc = new SubordinateQueryIndexDescForge(
null,
index.Value.OptionalIndexName,
index.Value.OptionalIndexModuleName,
index.Key,
indexItemForge);
var forge = new SubordinateQueryPlanDescForge(lookupStrategyFactoryX, new SubordinateQueryIndexDescForge[]{indexDesc});
return new SubordinateQueryPlan(forge, EmptyList<StmtClassForgeableFactory>.Instance);
}
}
}
}
var hashKeys = Collections.GetEmptyList<SubordPropHashKeyForge>();
CoercionDesc hashKeyCoercionTypes = null;
var rangeKeys = Collections.GetEmptyList<SubordPropRangeKeyForge>();
CoercionDesc rangeKeyCoercionTypes = null;
IList<ExprNode> inKeywordSingleIdxKeys = null;
ExprNode inKeywordMultiIdxKey = null;
SubordinateQueryIndexDescForge[] indexDescs;
var additionalForgeables = new List<StmtClassForgeableFactory>();
MultiKeyClassRef multiKeyClasses = null;
if (joinDesc.InKeywordSingleIndex != null) {
var single = joinDesc.InKeywordSingleIndex;
var keyInfo = new SubordPropHashKeyForge(
new QueryGraphValueEntryHashKeyedForgeExpr(single.Expressions[0], false),
null,
single.CoercionType);
var index = FindOrSuggestIndex(
Collections.SingletonMap(single.IndexedProp, keyInfo),
EmptyDictionary<string, SubordPropRangeKeyForge>.Instance,
optionalIndexHint,
indexShare,
subqueryNumber,
indexMetadata,
optionalUniqueKeyProps,
onlyUseExistingIndexes,
eventTypeIndexed,
statementRawInfo,
services);
if (index == null) {
return null;
}
var indexDesc = index.Forge;
var desc = new SubordinateQueryIndexDescForge(
indexDesc.OptionalIndexKeyInfo,
indexDesc.IndexName,
indexDesc.IndexModuleName,
indexDesc.IndexMultiKey,
indexDesc.OptionalQueryPlanIndexItem);
indexDescs = new[] {desc};
inKeywordSingleIdxKeys = single.Expressions;
additionalForgeables.AddAll(index.MultiKeyForgeables);
}
else if (joinDesc.InKeywordMultiIndex != null) {
var multi = joinDesc.InKeywordMultiIndex;
indexDescs = new SubordinateQueryIndexDescForge[multi.IndexedProp.Length];
for (var i = 0; i < multi.IndexedProp.Length; i++) {
var keyInfo = new SubordPropHashKeyForge(
new QueryGraphValueEntryHashKeyedForgeExpr(multi.Expression, false),
null,
multi.CoercionType);
var index = FindOrSuggestIndex(
Collections.SingletonMap(multi.IndexedProp[i], keyInfo),
EmptyDictionary<string, SubordPropRangeKeyForge>.Instance,
optionalIndexHint,
indexShare,
subqueryNumber,
indexMetadata,
optionalUniqueKeyProps,
onlyUseExistingIndexes,
eventTypeIndexed,
statementRawInfo,
services);
var indexDesc = index.Forge;
additionalForgeables.AddAll(index.MultiKeyForgeables);
if (indexDesc == null) {
return null;
}
indexDescs[i] = indexDesc;
}
inKeywordMultiIdxKey = multi.Expression;
}
else {
var index = FindOrSuggestIndex(
joinDesc.HashProps,
joinDesc.RangeProps,
optionalIndexHint,
false,
subqueryNumber,
indexMetadata,
optionalUniqueKeyProps,
onlyUseExistingIndexes,
eventTypeIndexed,
statementRawInfo,
services);
if (index == null) {
return null;
}
var indexDesc = index.Forge;
additionalForgeables.AddRange(index.MultiKeyForgeables);
var indexKeyInfo = indexDesc.OptionalIndexKeyInfo;
hashKeys = indexKeyInfo.OrderedHashDesc;
hashKeyCoercionTypes = indexKeyInfo.OrderedKeyCoercionTypes;
rangeKeys = indexKeyInfo.OrderedRangeDesc;
rangeKeyCoercionTypes = indexKeyInfo.OrderedRangeCoercionTypes;
var desc = new SubordinateQueryIndexDescForge(
indexDesc.OptionalIndexKeyInfo,
indexDesc.IndexName,
indexDesc.IndexModuleName,
indexDesc.IndexMultiKey,
indexDesc.OptionalQueryPlanIndexItem);
indexDescs = new[] {desc};
if (indexDesc.OptionalQueryPlanIndexItem == null) {
var multiKeyPlan = MultiKeyPlanner.PlanMultiKey(hashKeyCoercionTypes.CoercionTypes, true, statementRawInfo, services.SerdeResolver);
multiKeyClasses = multiKeyPlan.ClassRef;
additionalForgeables.AddRange(multiKeyPlan.MultiKeyForgeables);
} else {
multiKeyClasses = indexDesc.OptionalQueryPlanIndexItem.HashMultiKeyClasses;
}
}
if (forceTableScan) {
return null;
}
var lookupStrategyFactory = SubordinateTableLookupStrategyUtil.GetLookupStrategy(
outerStreams,
hashKeys,
hashKeyCoercionTypes,
multiKeyClasses,
rangeKeys,
rangeKeyCoercionTypes,
inKeywordSingleIdxKeys,
inKeywordMultiIdxKey,
isNWOnTrigger);
var forgeX = new SubordinateQueryPlanDescForge(lookupStrategyFactory, indexDescs);
return new SubordinateQueryPlan(forgeX, additionalForgeables);
}
private static SubordinateQueryIndexSuggest FindOrSuggestIndex(
IDictionary<string, SubordPropHashKeyForge> hashProps,
IDictionary<string, SubordPropRangeKeyForge> rangeProps,
IndexHint optionalIndexHint,
bool isIndexShare,
int subqueryNumber,
EventTableIndexMetadata indexMetadata,
ISet<string> optionalUniqueKeyProps,
bool onlyUseExistingIndexes,
EventType eventTypeIndexed,
StatementRawInfo raw,
StatementCompileTimeServices services)
{
var indexProps = GetIndexPropDesc(hashProps, rangeProps);
var hashedAndBtreeProps = indexProps.ListPair;
// Get or create the table for this index (exact match or property names, type of index and coercion type is expected)
IndexKeyInfo indexKeyInfo; // how needs all of IndexKeyInfo+QueryPlanIndexItem+IndexMultiKey
IndexMultiKey indexMultiKey;
string indexName = null;
string indexModuleName = null;
QueryPlanIndexItemForge planIndexItem = null;
if (hashedAndBtreeProps.HashedProps.IsEmpty() && hashedAndBtreeProps.BtreeProps.IsEmpty()) {
return null;
}
Pair<IndexMultiKey, NameAndModule> existing = null;
SubordinateQueryIndexPlan planned = null;
// consider index hints
IList<IndexHintInstruction> optionalIndexHintInstructions = null;
if (optionalIndexHint != null) {
optionalIndexHintInstructions = optionalIndexHint.GetInstructionsSubquery(subqueryNumber);
}
var indexFoundPair = EventTableIndexUtil.FindIndexConsiderTyping(
indexMetadata.Indexes,
hashedAndBtreeProps.HashedProps,
hashedAndBtreeProps.BtreeProps,
optionalIndexHintInstructions);
if (indexFoundPair != null) {
var hintIndex = indexMetadata.Indexes.Get(indexFoundPair);
existing = new Pair<IndexMultiKey, NameAndModule>(
indexFoundPair,
new NameAndModule(hintIndex.OptionalIndexName, hintIndex.OptionalIndexModuleName));
}
// nothing found: plan one
if (existing == null && !onlyUseExistingIndexes) {
// not found, see if the item is declared unique
var proposedHashedProps = hashedAndBtreeProps.HashedProps;
var proposedBtreeProps = hashedAndBtreeProps.BtreeProps;
// match against unique-key properties when suggesting an index
var unique = false;
var coerce = !isIndexShare;
if (optionalUniqueKeyProps != null && !optionalUniqueKeyProps.IsEmpty()) {
IList<IndexedPropDesc> newHashProps = new List<IndexedPropDesc>();
foreach (var uniqueKey in optionalUniqueKeyProps) {
var found = false;
foreach (var hashProp in hashedAndBtreeProps.HashedProps) {
if (hashProp.IndexPropName.Equals(uniqueKey)) {
newHashProps.Add(hashProp);
found = true;
break;
}
}
if (!found) {
newHashProps = null;
break;
}
}
if (newHashProps != null) {
proposedHashedProps = newHashProps;
proposedBtreeProps = new EmptyList<IndexedPropDesc>();
unique = true;
coerce = false;
}
}
planned = PlanIndex(unique, proposedHashedProps, proposedBtreeProps, eventTypeIndexed, raw, services);
}
// compile index information
if (existing == null && planned == null) {
return null;
}
// handle existing
IList<StmtClassForgeableFactory> multiKeyForgeables;
if (existing != null) {
indexKeyInfo = SubordinateQueryPlannerUtil.CompileIndexKeyInfo(
existing.First,
indexProps.HashIndexPropsProvided,
indexProps.HashJoinedProps,
indexProps.RangeIndexPropsProvided,
indexProps.RangeJoinedProps);
indexName = existing.Second.Name;
indexModuleName = existing.Second.ModuleName;
indexMultiKey = existing.First;
multiKeyForgeables = EmptyList<StmtClassForgeableFactory>.Instance;
}
else {
// handle planned
indexKeyInfo = SubordinateQueryPlannerUtil.CompileIndexKeyInfo(
planned.IndexPropKey,
indexProps.HashIndexPropsProvided,
indexProps.HashJoinedProps,
indexProps.RangeIndexPropsProvided,
indexProps.RangeJoinedProps);
indexMultiKey = planned.IndexPropKey;
planIndexItem = planned.IndexItem;
multiKeyForgeables = planned.MultiKeyForgeables;
}
var forge = new SubordinateQueryIndexDescForge(indexKeyInfo, indexName, indexModuleName, indexMultiKey, planIndexItem);
return new SubordinateQueryIndexSuggest(forge, multiKeyForgeables);
}