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path: root/src/mongo/db/query/optimizer/explain.cpp
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Diffstat (limited to 'src/mongo/db/query/optimizer/explain.cpp')
-rw-r--r--src/mongo/db/query/optimizer/explain.cpp169
1 files changed, 92 insertions, 77 deletions
diff --git a/src/mongo/db/query/optimizer/explain.cpp b/src/mongo/db/query/optimizer/explain.cpp
index 4cb4c18abf7..f5c349ac664 100644
--- a/src/mongo/db/query/optimizer/explain.cpp
+++ b/src/mongo/db/query/optimizer/explain.cpp
@@ -1045,6 +1045,91 @@ public:
return printer.str();
}
+ void printCandidateIndexEntry(ExplainPrinter& local,
+ const CandidateIndexEntry& candidateIndexEntry) {
+ local.fieldName("indexDefName", ExplainVersion::V3)
+ .print(candidateIndexEntry._indexDefName)
+ .separator(", ");
+
+ local.separator("{");
+ printFieldProjectionMap(local, candidateIndexEntry._fieldProjectionMap);
+ local.separator("}, {");
+
+ {
+ if constexpr (version < ExplainVersion::V3) {
+ bool first = true;
+ for (const auto type : candidateIndexEntry._predTypes) {
+ if (first) {
+ first = false;
+ } else {
+ local.print(", ");
+ }
+ local.print(IndexFieldPredTypeEnum::toString[static_cast<int>(type)]);
+ }
+ } else if constexpr (version == ExplainVersion::V3) {
+ std::vector<ExplainPrinter> printers;
+ for (const auto type : candidateIndexEntry._predTypes) {
+ ExplainPrinter local1;
+ local1.print(IndexFieldPredTypeEnum::toString[static_cast<int>(type)]);
+ printers.push_back(std::move(local1));
+ }
+ local.fieldName("predType").print(printers);
+ } else {
+ MONGO_UNREACHABLE;
+ }
+ }
+
+ local.separator("}, ");
+ {
+ if (candidateIndexEntry._eqPrefixes.size() == 1) {
+ local.fieldName("intervals", ExplainVersion::V3);
+
+ ExplainPrinter intervals = printIntervalExpr<CompoundIntervalRequirement>(
+ candidateIndexEntry._eqPrefixes.front()._interval);
+ local.printSingleLevel(intervals, "" /*singleLevelSpacer*/);
+ } else {
+ std::vector<ExplainPrinter> eqPrefixPrinters;
+ for (const auto& entry : candidateIndexEntry._eqPrefixes) {
+ ExplainPrinter eqPrefixPrinter;
+ eqPrefixPrinter.fieldName("startPos", ExplainVersion::V3)
+ .print(entry._startPos)
+ .separator(", ");
+
+ ExplainPrinter intervals =
+ printIntervalExpr<CompoundIntervalRequirement>(entry._interval);
+ eqPrefixPrinter.separator("[")
+ .fieldName("interval", ExplainVersion::V3)
+ .printSingleLevel(intervals, "" /*singleLevelSpacer*/)
+ .separator("]");
+
+ eqPrefixPrinters.push_back(std::move(eqPrefixPrinter));
+ }
+
+ local.print(eqPrefixPrinters);
+ }
+ }
+
+ if (const auto& residualReqs = candidateIndexEntry._residualRequirements) {
+ local.separator("}, ");
+ if constexpr (version < ExplainVersion::V3) {
+ ExplainPrinter residualReqMapPrinter;
+ printResidualRequirements(residualReqMapPrinter, *residualReqs);
+ local.print(residualReqMapPrinter);
+ } else if (version == ExplainVersion::V3) {
+ printResidualRequirements(local, *residualReqs);
+ } else {
+ MONGO_UNREACHABLE;
+ }
+ }
+ }
+
+
+ std::string printCandidateIndexEntry(const CandidateIndexEntry& indexEntry) {
+ ExplainPrinter printer;
+ printCandidateIndexEntry(printer, indexEntry);
+ return printer.str();
+ }
+
void printPartialSchemaEntry(ExplainPrinter& printer, const PartialSchemaEntry& entry) {
const auto& [key, req] = entry;
@@ -1429,83 +1514,8 @@ public:
const CandidateIndexEntry& candidateIndexEntry = candidateIndexes.at(index);
ExplainPrinter local;
- local.fieldName("candidateId")
- .print(index + 1)
- .separator(", ")
- .fieldName("indexDefName", ExplainVersion::V3)
- .print(candidateIndexEntry._indexDefName)
- .separator(", ");
-
- local.separator("{");
- printFieldProjectionMap(local, candidateIndexEntry._fieldProjectionMap);
- local.separator("}, {");
-
- {
- if constexpr (version < ExplainVersion::V3) {
- bool first = true;
- for (const auto type : candidateIndexEntry._predTypes) {
- if (first) {
- first = false;
- } else {
- local.print(", ");
- }
- local.print(IndexFieldPredTypeEnum::toString[static_cast<int>(type)]);
- }
- } else if constexpr (version == ExplainVersion::V3) {
- std::vector<ExplainPrinter> printers;
- for (const auto type : candidateIndexEntry._predTypes) {
- ExplainPrinter local1;
- local1.print(IndexFieldPredTypeEnum::toString[static_cast<int>(type)]);
- printers.push_back(std::move(local1));
- }
- local.fieldName("predType").print(printers);
- } else {
- MONGO_UNREACHABLE;
- }
- }
-
- local.separator("}, ");
- {
- if (candidateIndexEntry._eqPrefixes.size() == 1) {
- local.fieldName("intervals", ExplainVersion::V3);
-
- ExplainPrinter intervals = printIntervalExpr<CompoundIntervalRequirement>(
- candidateIndexEntry._eqPrefixes.front()._interval);
- local.printSingleLevel(intervals, "" /*singleLevelSpacer*/);
- } else {
- std::vector<ExplainPrinter> eqPrefixPrinters;
- for (const auto& entry : candidateIndexEntry._eqPrefixes) {
- ExplainPrinter eqPrefixPrinter;
- eqPrefixPrinter.fieldName("startPos", ExplainVersion::V3)
- .print(entry._startPos)
- .separator(", ");
-
- ExplainPrinter intervals =
- printIntervalExpr<CompoundIntervalRequirement>(entry._interval);
- eqPrefixPrinter.separator("[")
- .fieldName("interval", ExplainVersion::V3)
- .printSingleLevel(intervals, "" /*singleLevelSpacer*/)
- .separator("]");
-
- eqPrefixPrinters.push_back(std::move(eqPrefixPrinter));
- }
-
- local.print(eqPrefixPrinters);
- }
- }
-
- if (const auto& residualReqs = candidateIndexEntry._residualRequirements) {
- if constexpr (version < ExplainVersion::V3) {
- ExplainPrinter residualReqMapPrinter;
- printResidualRequirements(residualReqMapPrinter, *residualReqs);
- local.print(residualReqMapPrinter);
- } else if (version == ExplainVersion::V3) {
- printResidualRequirements(local, *residualReqs);
- } else {
- MONGO_UNREACHABLE;
- }
- }
-
+ local.fieldName("candidateId").print(index + 1).separator(", ");
+ printCandidateIndexEntry(local, candidateIndexEntry);
candidateIndexesPrinters.push_back(std::move(local));
}
ExplainPrinter candidateIndexesPrinter;
@@ -3057,4 +3067,9 @@ std::string ExplainGenerator::explainIntervalExpr(
ExplainGeneratorV2 gen;
return gen.printIntervalExpr<CompoundIntervalRequirement>(intervalExpr).str();
}
+
+std::string ExplainGenerator::explainCandidateIndex(const CandidateIndexEntry& indexEntry) {
+ ExplainGeneratorV2 gen;
+ return gen.printCandidateIndexEntry(indexEntry);
+}
} // namespace mongo::optimizer
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