v2.1.52.2，TEXT/BLOB字段定义为NOT NULL时给出提示

Author: hhyo

Diff for: cmake/mysql_version.cmake

@@ -53,7 +53,7 @@ MACRO(GET_MYSQL_VERSION)
     MESSAGE(FATAL_ERROR "VERSION file cannot be parsed.")
   ENDIF()
 
-  SET(VERSION "2.1.52.1")
+  SET(VERSION "2.1.52.2")
   MESSAGE(STATUS "MySQL ${VERSION}")
   SET(MYSQL_BASE_VERSION "${MAJOR_VERSION}.${MINOR_VERSION}" CACHE INTERNAL "MySQL Base version")
   SET(MYSQL_NO_DASH_VERSION "${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION}")

Diff for: sql/derror.cc

@@ -182,7 +182,7 @@ bool init_errmessage(void)
 		SERVER_SETMSG(ER_INDEX_USE_ALTER_TABLE, "请使用ALTER语句进行索引变更");
 		SERVER_SETMSG(ER_WITH_DEFAULT_ADD_COLUMN, "建议给字段 \'%-.192s\' 添加默认值");
 		SERVER_SETMSG(ER_TRUNCATED_WRONG_VALUE, "Truncated incorrect %-.32s value: \'%-.128s\'");
-		SERVER_SETMSG(ER_TEXT_NOT_NULLABLE_ERROR, "TEXT/BLOB字段 \'%-.64s\' 不允许为NULL，请指定为NOT NULL");
+		SERVER_SETMSG(ER_TEXT_NOT_NULLABLE_ERROR, "TEXT/BLOB字段 \'%-.64s\' 无法设置默认值，不建议使用NOT NULL，请指定为NULL");
 		SERVER_SETMSG(ER_WRONG_VALUE_FOR_VAR, "Variable \'%-.64s\' can\'t be set to the value of \'%-.200s\'");
 		SERVER_SETMSG(ER_TOO_MUCH_AUTO_TIMESTAMP_COLS, "Incorrect table definition; there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT or ON UPDATE clause");
 		SERVER_SETMSG(ER_INVALID_ON_UPDATE, "Invalid ON UPDATE clause for \'%-.192s\' column");

Diff for: sql/sql_parse.cc

@@ -2017,7 +2017,6 @@ mysql_check_inception_variables(
             return false;
         break;
 
-    case ER_TEXT_NOT_NULLABLE_ERROR:
     case ER_NOT_ALLOWED_NULLABLE:
         if (inception_enable_nullable)
             return false;
@@ -5335,7 +5334,7 @@ int mysql_field_check(THD* thd, Create_field* field, char* table_name)
         mysql_errmsg_append(thd);
     }
 
-    if (!(field->flags & NOT_NULL_FLAG) && mysql_field_is_blob(field->sql_type))
+    if ((field->flags & NOT_NULL_FLAG) && mysql_field_is_blob(field->sql_type))
     {
         my_error(ER_TEXT_NOT_NULLABLE_ERROR, MYF(0), field->field_name, table_name);
         mysql_errmsg_append(thd);