[fix][dingo-driver] Remove RelNodeCache because it is not stable enough

Author: guojn1

dingo-calcite/src/main/java/io/dingodb/calcite/DingoDdlExecutor.java

@@ -733,7 +733,6 @@ private void dropTableByName(SqlDropTable drop, Connection context, DingoSchema
             schema.dropTable(tableName);
             userService.dropTablePrivilege(schema.name(), tableName);
             StatsOperator.delStats(schema.name(), tableName);
-            RelNodeCache.clearRelNode(tableName);
         } catch (TimeoutException e) {
             future.cancel(true);
             throw new RuntimeException("Lock wait timeout exceeded.");
@@ -779,7 +778,6 @@ public void execute(@NonNull SqlTruncate truncate, CalcitePrepare.Context contex
             LogUtils.info(log, "DDL execute truncate lock end lock: {}", lock);
             schema.getMetaService().truncateTable(tableName);
             StatsOperator.delStats(schema.name(), tableName);
-            RelNodeCache.clearRelNode(tableName);
         } catch (TimeoutException e) {
             future.cancel(true);
             throw new RuntimeException("Lock wait timeout exceeded.");

dingo-calcite/src/main/java/io/dingodb/calcite/utils/RelNodeCache.java

@@ -78,10 +78,10 @@ public static void setRelNode(String schema, String sql, RelNode relNode, boolea
     }
 
     public static void clearRelNode(String tableName) {
-        Collection<Map<String, RelNode>> collection = relNodeCache.asMap().values();
-        collection.forEach(map -> {
-            map.keySet().removeIf(key -> key.contains(tableName)
-              || key.contains(tableName.toUpperCase()) || key.contains(tableName.toLowerCase()));
-        });
+        //Collection<Map<String, RelNode>> collection = relNodeCache.asMap().values();
+        //collection.forEach(map -> {
+        //    map.keySet().removeIf(key -> key.contains(tableName)
+        //      || key.contains(tableName.toUpperCase()) || key.contains(tableName.toLowerCase()));
+        //});
     }
 }

dingo-driver/host/src/main/java/io/dingodb/driver/DingoDriverParser.java

@@ -343,12 +343,8 @@ public Meta.Signature parseQuery(
         List<List<String>> originList = validator.getFieldOrigins(sqlNode);
         final List<ColumnMetaData> columns = getColumnMetaDataList(typeFactory, jdbcType, originList);
 
-        RelNode relNode = RelNodeCache.getRelNode(connection.getSchema(), sql, prepare);
-        if (relNode == null) {
-            final RelRoot relRoot = convert(sqlNode, false);
-            relNode = optimize(relRoot.rel);
-            RelNodeCache.setRelNode(connection.getSchema(), sql, relNode, prepare);
-        }
+        final RelRoot relRoot = convert(sqlNode, false);
+        RelNode relNode = optimize(relRoot.rel);
         planProfile.endOptimize();
         markAutoIncForDml(relNode);
         Location currentLocation = MetaService.root().currentLocation();