Improve or remove unclear 'Got error ...' error log messages: errors 1227, 1814, 1064 and 1290

INSTALL PLUGIN Spider SONAME 'ha_spider.so';

CREATE USER Spider@localhost IDENTIFIED BY 'PWD123';

GRANT ALL ON test.* TO Spider@localhost;

CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET '../socket.sock', DATABASE 'test', USER 'Spider', PASSWORD 'PWD123');

CREATE TABLE t (c INT) ENGINE=InnoDB;

SET spider_internal_sql_log_off=0;

CREATE TABLE t1 (a INT PRIMARY KEY) ENGINE=Spider COMMENT='WRAPPER "mysql", srv "srv", TABLE "t"';

SELECT LEFT('a', SUM(a)) FROM t1;

10.11.0-dbg>SELECT LEFT('a', SUM(a)) FROM t1;

ERROR 1227 (42000): Access denied; you need (at least one of) the SUPER privilege(s) for this operation

Version: '10.11.0-MariaDB-debug'  socket: '/test/MD190922-mariadb-10.11.0-linux-x86_64-dbg/socket.sock'  port: 12223  MariaDB Server

2022-09-28 20:34:12 4 [ERROR] Got error 1227 when reading table './test/t1'

$ ./bin/perror 1227

MariaDB error code 1227 (ER_SPECIFIC_ACCESS_DENIED_ERROR): Access denied; you need (at least one of) the %-.128s privilege(s) for this operation