delete query from compile cache if it is existed during insert (#8506)

Author: VPolka

ydb/core/kqp/common/simple/query_id.cpp

@@ -4,6 +4,7 @@
 #include <google/protobuf/util/message_differencer.h>
 
 #include <util/generic/yexception.h>
+#include <util/string/escape.h>
 
 #include <memory>
 
@@ -74,4 +75,25 @@ bool TKqpQueryId::operator==(const TKqpQueryId& other) const {
     return true;
 }
 
+TString TKqpQueryId::SerializeToString() const {
+    TStringBuilder result = TStringBuilder() << "{"
+        << "Cluster: " << Cluster << ", "
+        << "Database: " << Database << ", "
+        << "UserSid: " << UserSid << ", "
+        << "Text: " << EscapeC(Text) << ", "
+        << "Settings: " << Settings.SerializeToString() << ", ";
+    if (QueryParameterTypes) {
+        result << "QueryParameterTypes: [";
+        for (const auto& param : *QueryParameterTypes) {
+            result << "name: " << param.first << ", type: " << param.second.ShortDebugString();
+        }
+        result << "], ";
+    } else {
+        result << "QueryParameterTypes: <empty>, ";
+    }
+
+    result << "GUCSettings: " << GUCSettings.SerializeToString() << "}";
+    return result;
+}
+
 } // namespace NKikimr::NKqp

ydb/core/kqp/common/simple/query_id.h

@@ -44,6 +44,8 @@ struct TKqpQueryId {
             GUCSettings.GetHash());
         return THash<decltype(tuple)>()(tuple);
     }
+
+    TString SerializeToString() const;
 };
 } // namespace NKikimr::NKqp
 

ydb/core/kqp/common/simple/settings.h

@@ -3,7 +3,9 @@
 #include <ydb/core/protos/kqp.pb.h>
 #include <ydb/public/api/protos/ydb_query.pb.h>
 
+#include <util/generic/string.h>
 #include <util/str_stl.h>
+#include <util/string/builder.h>
 
 #include <tuple>
 
@@ -39,6 +41,14 @@ struct TKqpQuerySettings {
         auto tuple = std::make_tuple(DocumentApiRestricted, IsInternalCall, QueryType, Syntax);
         return THash<decltype(tuple)>()(tuple);
     }
+
+    TString SerializeToString() const {
+        TStringBuilder result = TStringBuilder() << "{"
+            << "DocumentApiRestricted: " << DocumentApiRestricted << ", "
+            << "IsInternalCall: " << IsInternalCall << ", "
+            << "QueryType: " << QueryType << "}";
+        return result;
+    }
 };
 
 } // namespace NKikimr::NKqp

ydb/core/kqp/compile_service/kqp_compile_service.cpp

@@ -41,6 +41,9 @@ class TKqpQueryCache {
         YQL_ENSURE(compileResult->PreparedQuery);
 
         auto queryIt = QueryIndex.emplace(query, compileResult->Uid);
+        if (!queryIt.second) {
+            EraseByUid(compileResult->Uid);
+        }
         Y_ENSURE(queryIt.second);
     }
 
@@ -676,6 +679,7 @@ class TKqpCompileService : public TActorBootstrapped<TKqpCompileService> {
             Y_ENSURE(query.UserSid == userSid);
         }
 
+        LOG_DEBUG_S(ctx, NKikimrServices::KQP_COMPILE_SERVICE, "Try to find query by queryId, queryId: " << query.SerializeToString());
         auto compileResult = QueryCache.FindByQuery(query, request.KeepInCache);
         if (HasTempTablesNameClashes(compileResult, request.TempTablesState)) {
             compileResult = nullptr;
@@ -857,7 +861,7 @@ class TKqpCompileService : public TActorBootstrapped<TKqpCompileService> {
         try {
             if (compileResult->Status == Ydb::StatusIds::SUCCESS) {
                 if (!hasTempTablesNameClashes) {
-                    UpdateQueryCache(compileResult, keepInCache, compileRequest.CompileSettings.IsQueryActionPrepare, isPerStatementExecution);
+                    UpdateQueryCache(ctx, compileResult, keepInCache, compileRequest.CompileSettings.IsQueryActionPrepare, isPerStatementExecution);
                 }
 
                 if (ev->Get()->ReplayMessage && !QueryReplayBackend->IsNull()) {
@@ -939,15 +943,21 @@ class TKqpCompileService : public TActorBootstrapped<TKqpCompileService> {
         return compileResult->PreparedQuery->HasTempTables(tempTablesState, withSessionId);
     }
 
-    void UpdateQueryCache(TKqpCompileResult::TConstPtr compileResult, bool keepInCache, bool isQueryActionPrepare, bool isPerStatementExecution) {
+    void UpdateQueryCache(const TActorContext& ctx, TKqpCompileResult::TConstPtr compileResult, bool keepInCache, bool isQueryActionPrepare, bool isPerStatementExecution) {
         if (QueryCache.FindByUid(compileResult->Uid, false)) {
             QueryCache.Replace(compileResult);
         } else if (keepInCache) {
+            if (compileResult->Query) {
+                LOG_DEBUG_S(ctx, NKikimrServices::KQP_COMPILE_SERVICE, "Insert query into compile cache, queryId: " << compileResult->Query->SerializeToString());
+                if (QueryCache.FindByQuery(*compileResult->Query, keepInCache)) {
+                    LOG_ERROR_S(ctx, NKikimrServices::KQP_COMPILE_SERVICE, "Trying to insert query into compile cache when it is already there");
+                }
+            }
             if (QueryCache.Insert(compileResult, TableServiceConfig.GetEnableAstCache(), isPerStatementExecution)) {
                 Counters->CompileQueryCacheEvicted->Inc();
             }
             if (compileResult->Query && isQueryActionPrepare) {
-                if (InsertPreparingQuery(compileResult, true, isPerStatementExecution)) {
+                if (InsertPreparingQuery(ctx, compileResult, true, isPerStatementExecution)) {
                     Counters->CompileQueryCacheEvicted->Inc();
                 };
             }
@@ -958,6 +968,8 @@ class TKqpCompileService : public TActorBootstrapped<TKqpCompileService> {
         YQL_ENSURE(queryAst.Ast);
         YQL_ENSURE(queryAst.Ast->IsOk());
         YQL_ENSURE(queryAst.Ast->Root);
+        LOG_DEBUG_S(ctx, NKikimrServices::KQP_COMPILE_SERVICE, "Try to find query by ast, queryId: " << compileRequest.Query.SerializeToString()
+            << ", ast: " << queryAst.Ast->Root->ToString());
         auto compileResult = QueryCache.FindByAst(compileRequest.Query, *queryAst.Ast, compileRequest.CompileSettings.KeepInCache);
 
         if (HasTempTablesNameClashes(compileResult, compileRequest.TempTablesState)) {
@@ -1026,7 +1038,7 @@ class TKqpCompileService : public TActorBootstrapped<TKqpCompileService> {
     }
 
 private:
-    bool InsertPreparingQuery(const TKqpCompileResult::TConstPtr& compileResult, bool keepInCache, bool isPerStatementExecution) {
+    bool InsertPreparingQuery(const TActorContext& ctx, const TKqpCompileResult::TConstPtr& compileResult, bool keepInCache, bool isPerStatementExecution) {
         YQL_ENSURE(compileResult->Query);
         auto query = *compileResult->Query;
 
@@ -1051,6 +1063,7 @@ class TKqpCompileService : public TActorBootstrapped<TKqpCompileService> {
         auto newCompileResult = TKqpCompileResult::Make(CreateGuidAsString(), compileResult->Status, compileResult->Issues, compileResult->MaxReadType, std::move(query), compileResult->Ast);
         newCompileResult->AllowCache = compileResult->AllowCache;
         newCompileResult->PreparedQuery = compileResult->PreparedQuery;
+        LOG_DEBUG_S(ctx, NKikimrServices::KQP_COMPILE_SERVICE, "Insert preparing query with params, queryId: " << query.SerializeToString());
         return QueryCache.Insert(newCompileResult, TableServiceConfig.GetEnableAstCache(), isPerStatementExecution);
     }