bugfix: fixed problem when set useInformationSchema true and table na…

…me was keyword (apache#1768)

rm-datasource/src/main/java/io/seata/rm/datasource/sql/struct/cache/MysqlTableMetaCache.java

@@ -106,6 +106,20 @@ private TableMeta resultSetMetaToSchema(ResultSetMetaData rsmd, DatabaseMetaData
         TableMeta tm = new TableMeta();
         tm.setTableName(tableName);
 
+        /*
+         * when set the useInformationSchema true just like jdbc:mysql://127.0.0.1:3306/xxx?useInformationSchema=true
+         * mysql will use DatabaseMetaDataUsingInfoSchema instead of DatabaseMetaData
+         * so
+         * the type of get table meta will change from
+         * show full columns from xxx from xxx
+         * to
+         * select xxx from xxx where catalog_name like ? and table_name like ?
+         * in the second type we have to remove the "`"
+         */
+        if(tableName.contains("`")){
+            tableName = tableName.replace("`", "");
+        }
+
         ResultSet rsColumns = dbmd.getColumns(catalogName, schemaName, tableName, "%");
         ResultSet rsIndex = dbmd.getIndexInfo(catalogName, schemaName, tableName, false, true);