Performance improvement

dao/src/main/java/org/thingsboard/server/dao/sql/query/DefaultEntityQueryRepository.java

@@ -261,8 +261,6 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
                     .collect(Collectors.toList());
             List<EntityKeyMapping> entityFieldsFiltersMapping = filterMapping.stream().filter(mapping -> !mapping.isLatest())
                     .collect(Collectors.toList());
-            List<EntityKeyMapping> latestFiltersMapping = filterMapping.stream().filter(EntityKeyMapping::isLatest)
-                    .collect(Collectors.toList());
 
             List<EntityKeyMapping> allLatestMappings = mappings.stream().filter(EntityKeyMapping::isLatest)
                     .collect(Collectors.toList());
@@ -271,7 +269,6 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
             String entityWhereClause = DefaultEntityQueryRepository.this.buildEntityWhere(ctx, query.getEntityFilter(), entityFieldsFiltersMapping);
             String latestJoinsCnt = EntityKeyMapping.buildLatestJoins(ctx, query.getEntityFilter(), entityType, allLatestMappings, true);
             String latestJoinsData = EntityKeyMapping.buildLatestJoins(ctx, query.getEntityFilter(), entityType, allLatestMappings, false);
-            String whereClause = DefaultEntityQueryRepository.this.buildWhere(ctx, latestFiltersMapping, query.getEntityFilter().getType());
             String textSearchQuery = DefaultEntityQueryRepository.this.buildTextSearchQuery(ctx, selectionMapping, pageLink.getTextSearch());
             String entityFieldsSelection = EntityKeyMapping.buildSelections(entityFieldsSelectionMapping, query.getEntityFilter().getType(), entityType);
             String entityTypeStr;
@@ -291,22 +288,20 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
                 topSelection = topSelection + ", " + latestSelection;
             }
 
-            String fromClauseCount = String.format("from (select %s from (select %s from %s e where %s) entities %s %s) result %s",
+            String fromClauseCount = String.format("from (select %s from (select %s from %s e where %s) entities %s ) result %s",
                     "entities.*",
                     entityFieldsSelection,
                     addEntityTableQuery(ctx, query.getEntityFilter()),
                     entityWhereClause,
                     latestJoinsCnt,
-                    whereClause,
                     textSearchQuery);
 
-            String fromClauseData = String.format("from (select %s from (select %s from %s e where %s) entities %s %s) result %s",
+            String fromClauseData = String.format("from (select %s from (select %s from %s e where %s) entities %s ) result %s",
                     topSelection,
                     entityFieldsSelection,
                     addEntityTableQuery(ctx, query.getEntityFilter()),
                     entityWhereClause,
                     latestJoinsData,
-                    whereClause,
                     textSearchQuery);
 
             if (!StringUtils.isEmpty(pageLink.getTextSearch())) {
@@ -547,15 +542,6 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
         return from;
     }
 
-    private String buildWhere(QueryContext ctx, List<EntityKeyMapping> latestFiltersMapping, EntityFilterType filterType) {
-        String latestFilters = EntityKeyMapping.buildQuery(ctx, latestFiltersMapping, filterType);
-        if (!StringUtils.isEmpty(latestFilters)) {
-            return String.format("where %s", latestFilters);
-        } else {
-            return "";
-        }
-    }
-
     private String buildTextSearchQuery(QueryContext ctx, List<EntityKeyMapping> selectionMapping, String searchText) {
         if (!StringUtils.isEmpty(searchText) && !selectionMapping.isEmpty()) {
             String lowerSearchText = searchText.toLowerCase() + "%";

dao/src/main/java/org/thingsboard/server/dao/sql/query/EntityKeyMapping.java

@@ -16,6 +16,7 @@
 package org.thingsboard.server.dao.sql.query;
 
 import lombok.Data;
+import org.springframework.util.StringUtils;
 import org.thingsboard.server.common.data.DataConstants;
 import org.thingsboard.server.common.data.EntityType;
 import org.thingsboard.server.common.data.query.BooleanFilterPredicate;
@@ -224,7 +225,7 @@ public class EntityKeyMapping {
             return keyFilters.stream().map(keyFilter ->
                     this.buildKeyQuery(ctx, keyAlias, keyFilter, filterType));
         } else {
-            return null;
+            return Stream.empty();
         }
     }
 
@@ -236,15 +237,22 @@ public class EntityKeyMapping {
             entityTypeStr = "'" + entityType.name() + "'";
         }
         ctx.addStringParameter(alias + "_key_id", entityKey.getKey());
+        String filterQuery = toQueries(ctx, entityFilter.getType()).filter(Objects::nonNull).collect(
+                Collectors.joining(" and "));
+        if (StringUtils.isEmpty(filterQuery)) {
+            filterQuery = "";
+        } else {
+            filterQuery = " AND (" + filterQuery + ")";
+        }
         if (entityKey.getType().equals(EntityKeyType.TIME_SERIES)) {
             String join = hasFilter() ? "left join" : "left outer join";
-            return String.format("%s ts_kv_latest %s ON %s.entity_id=entities.id AND %s.key = (select key_id from ts_kv_dictionary where key = :%s_key_id)",
-                    join, alias, alias, alias, alias);
+            return String.format("%s ts_kv_latest %s ON %s.entity_id=entities.id AND %s.key = (select key_id from ts_kv_dictionary where key = :%s_key_id) %s",
+                    join, alias, alias, alias, alias, filterQuery);
         } else {
             String query;
             if (!entityKey.getType().equals(EntityKeyType.ATTRIBUTE)) {
                 String join = hasFilter() ? "left join" : "left outer join";
-                query = String.format("%s attribute_kv %s ON %s.entity_id=entities.id AND %s.entity_type=%s AND %s.attribute_key=:%s_key_id",
+                query = String.format("%s attribute_kv %s ON %s.entity_id=entities.id AND %s.entity_type=%s AND %s.attribute_key=:%s_key_id ",
                         join, alias, alias, alias, entityTypeStr, alias, alias);
                 String scope;
                 if (entityKey.getType().equals(EntityKeyType.CLIENT_ATTRIBUTE)) {
@@ -254,12 +262,12 @@ public class EntityKeyMapping {
                 } else {
                     scope = DataConstants.SERVER_SCOPE;
                 }
-                query = String.format("%s AND %s.attribute_type='%s'", query, alias, scope);
+                query = String.format("%s AND %s.attribute_type='%s' %s", query, alias, scope, filterQuery);
             } else {
                 String join = hasFilter() ? "join LATERAL" : "left join LATERAL";
-                query = String.format("%s (select * from attribute_kv %s WHERE %s.entity_id=entities.id AND %s.entity_type=%s AND %s.attribute_key=:%s_key_id " +
+                query = String.format("%s (select * from attribute_kv %s WHERE %s.entity_id=entities.id AND %s.entity_type=%s AND %s.attribute_key=:%s_key_id %s " +
                                 "ORDER BY %s.last_update_ts DESC limit 1) as %s ON true",
-                        join, alias, alias, alias, entityTypeStr, alias, alias, alias, alias);
+                        join, alias, alias, alias, entityTypeStr, alias, alias, filterQuery, alias, alias);
             }
             return query;
         }