MS-624 Search vectors failed if time ranges long enough

Former-commit-id: ef8933fcce46e08184581e9dfb8f6dd46e65f86e

core/CHANGELOG.md

@@ -9,14 +9,15 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-572 - Milvus crash when get SIGINT
 - MS-577 - Unittest Query randomly hung
 - MS-587 - Count get wrong result after adding vectors and index built immediately
-- MS-599 - search wrong result when table created with metric_type: IP
+- MS-599 - Search wrong result when table created with metric_type: IP
 - MS-601 - Docker logs error caused by get CPUTemperature error
 - MS-622 - Delete vectors should be failed if date range is invalid
 - MS-620 - Get table row counts display wrong error code
-- MS-637 - out of memory when load too many tasks
+- MS-637 - Out of memory when load too many tasks
 - MS-640 - Cache object size calculate incorrect
 - MS-641 - Segment fault(signal 11) in PickToLoad
 - MS-639 - SQ8H index created failed and server hang
+- MS-624 - Search vectors failed if time ranges long enough
 
 ## Improvement
 - MS-552 - Add and change the easylogging library

core/src/db/meta/Meta.h

@@ -81,7 +81,7 @@ class Meta {
     UpdateTableFiles(TableFilesSchema& files) = 0;
 
     virtual Status
-    FilesToSearch(const std::string& table_id, const std::vector<size_t>& ids, const DatesT& partition,
+    FilesToSearch(const std::string& table_id, const std::vector<size_t>& ids, const DatesT& dates,
                   DatePartionedTableFilesSchema& files) = 0;
 
     virtual Status

core/src/db/meta/MySQLMetaImpl.cpp

@@ -1088,7 +1088,7 @@ MySQLMetaImpl::FilesToIndex(TableFilesSchema& files) {
 }
 
 Status
-MySQLMetaImpl::FilesToSearch(const std::string& table_id, const std::vector<size_t>& ids, const DatesT& partition,
+MySQLMetaImpl::FilesToSearch(const std::string& table_id, const std::vector<size_t>& ids, const DatesT& dates,
                              DatePartionedTableFilesSchema& files) {
     files.clear();
 
@@ -1108,9 +1108,9 @@ MySQLMetaImpl::FilesToSearch(const std::string& table_id, const std::vector<size
                 << META_TABLEFILES << " "
                 << "WHERE table_id = " << mysqlpp::quote << table_id;
 
-            if (!partition.empty()) {
+            if (!dates.empty()) {
                 std::stringstream partitionListSS;
-                for (auto& date : partition) {
+                for (auto& date : dates) {
                     partitionListSS << std::to_string(date) << ", ";
                 }
                 std::string partitionListStr = partitionListSS.str();

core/src/db/meta/MySQLMetaImpl.h

@@ -89,7 +89,7 @@ class MySQLMetaImpl : public Meta {
     UpdateTableFiles(TableFilesSchema& files) override;
 
     Status
-    FilesToSearch(const std::string& table_id, const std::vector<size_t>& ids, const DatesT& partition,
+    FilesToSearch(const std::string& table_id, const std::vector<size_t>& ids, const DatesT& dates,
                   DatePartionedTableFilesSchema& files) override;
 
     Status

core/src/db/meta/SqliteMetaImpl.cpp

@@ -159,7 +159,7 @@ SqliteMetaImpl::Initialize() {
 Status
 SqliteMetaImpl::DropPartitionsByDates(const std::string &table_id,
                                       const DatesT &dates) {
-    if (dates.size() == 0) {
+    if (dates.empty()) {
         return Status::OK();
     }
 
@@ -171,16 +171,35 @@ SqliteMetaImpl::DropPartitionsByDates(const std::string &table_id,
     }
 
     try {
+        //sqlite_orm has a bug, 'in' statement cannot handle too many elements
+        //so we split one query into multi-queries, this is a work-around!!
+        std::vector<DatesT> split_dates;
+        split_dates.push_back(DatesT());
+        const size_t batch_size = 30;
+        for(DateT date : dates) {
+            DatesT& last_batch = *split_dates.rbegin();
+            last_batch.push_back(date);
+            if(last_batch.size() > batch_size) {
+                split_dates.push_back(DatesT());
+            }
+        }
+
         //multi-threads call sqlite update may get exception('bad logic', etc), so we add a lock here
         std::lock_guard<std::mutex> meta_lock(meta_mutex_);
 
-        ConnectorPtr->update_all(
-            set(
-                c(&TableFileSchema::file_type_) = (int) TableFileSchema::TO_DELETE,
-                c(&TableFileSchema::updated_time_) = utils::GetMicroSecTimeStamp()),
-            where(
-                c(&TableFileSchema::table_id_) == table_id and
-                    in(&TableFileSchema::date_, dates)));
+        for(auto& batch_dates : split_dates) {
+            if(batch_dates.empty()) {
+                continue;
+            }
+
+            ConnectorPtr->update_all(
+                set(
+                    c(&TableFileSchema::file_type_) = (int)TableFileSchema::TO_DELETE,
+                    c(&TableFileSchema::updated_time_) = utils::GetMicroSecTimeStamp()),
+                where(
+                    c(&TableFileSchema::table_id_) == table_id and
+                    in(&TableFileSchema::date_, batch_dates)));
+        }
 
         ENGINE_LOG_DEBUG << "Successfully drop partitions, table id = " << table_schema.table_id_;
     } catch (std::exception &e) {
@@ -673,7 +692,7 @@ SqliteMetaImpl::FilesToIndex(TableFilesSchema &files) {
 Status
 SqliteMetaImpl::FilesToSearch(const std::string &table_id,
                               const std::vector<size_t> &ids,
-                              const DatesT &partition,
+                              const DatesT &dates,
                               DatePartionedTableFilesSchema &files) {
     files.clear();
     server::MetricCollector metric;
@@ -702,23 +721,54 @@ SqliteMetaImpl::FilesToSearch(const std::string &table_id,
         auto status = DescribeTable(table_schema);
         if (!status.ok()) { return status; }
 
+        //sqlite_orm has a bug, 'in' statement cannot handle too many elements
+        //so we split one query into multi-queries, this is a work-around!!
+        std::vector<DatesT> split_dates;
+        split_dates.push_back(DatesT());
+        const size_t batch_size = 30;
+        for(DateT date : dates) {
+            DatesT& last_batch = *split_dates.rbegin();
+            last_batch.push_back(date);
+            if(last_batch.size() > batch_size) {
+                split_dates.push_back(DatesT());
+            }
+        }
+
+        //perform query
         decltype(ConnectorPtr->select(select_columns)) selected;
-        if (partition.empty() && ids.empty()) {
+        if (dates.empty() && ids.empty()) {
             auto filter = where(match_tableid and match_type);
             selected = ConnectorPtr->select(select_columns, filter);
-        } else if (partition.empty() && !ids.empty()) {
+        } else if (dates.empty() && !ids.empty()) {
             auto match_fileid = in(&TableFileSchema::id_, ids);
             auto filter = where(match_tableid and match_fileid and match_type);
             selected = ConnectorPtr->select(select_columns, filter);
-        } else if (!partition.empty() && ids.empty()) {
-            auto match_date = in(&TableFileSchema::date_, partition);
-            auto filter = where(match_tableid and match_date and match_type);
-            selected = ConnectorPtr->select(select_columns, filter);
-        } else if (!partition.empty() && !ids.empty()) {
-            auto match_fileid = in(&TableFileSchema::id_, ids);
-            auto match_date = in(&TableFileSchema::date_, partition);
-            auto filter = where(match_tableid and match_fileid and match_date and match_type);
-            selected = ConnectorPtr->select(select_columns, filter);
+        } else if (!dates.empty() && ids.empty()) {
+            for(auto& batch_dates : split_dates) {
+                if(batch_dates.empty()) {
+                    continue;
+                }
+                auto match_date = in(&TableFileSchema::date_, batch_dates);
+                auto filter = where(match_tableid and match_date and match_type);
+                auto batch_selected = ConnectorPtr->select(select_columns, filter);
+                for (auto &file : selected) {
+                    selected.push_back(file);
+                }
+            }
+
+        } else if (!dates.empty() && !ids.empty()) {
+            for(auto& batch_dates : split_dates) {
+                if(batch_dates.empty()) {
+                    continue;
+                }
+                auto match_fileid = in(&TableFileSchema::id_, ids);
+                auto match_date = in(&TableFileSchema::date_, batch_dates);
+                auto filter = where(match_tableid and match_fileid and match_date and match_type);
+                auto batch_selected = ConnectorPtr->select(select_columns, filter);
+                for (auto &file : selected) {
+                    selected.push_back(file);
+                }
+            }
         }
 
         Status ret;

core/src/db/meta/SqliteMetaImpl.h

@@ -89,7 +89,7 @@ class SqliteMetaImpl : public Meta {
     UpdateTableFiles(TableFilesSchema& files) override;
 
     Status
-    FilesToSearch(const std::string& table_id, const std::vector<size_t>& ids, const DatesT& partition,
+    FilesToSearch(const std::string& table_id, const std::vector<size_t>& ids, const DatesT& dates,
                   DatePartionedTableFilesSchema& files) override;
 
     Status