GBase8a数据库加载空格处理

加载语句参数preserve blanks用于设定是否保留字段内容两端的空格，加载语句默认不保留空格。
加载语句示例：drop database if exists test;create database test;use test;create table t(a int, b varchar(20),c bigint); （1）加载默认不保留空格load data infile 'file://${ip_host}/opt/t.tbl' into table t fields terminated by '|';

（2）加载语句参数preserve blanks，保留字段两端空格load data infile 'file://${ip_host}/opt/t.tbl' into table t fields terminated by '|' preserve blanks;

（3）加载语句参数preserve leading blanks，保留字段左端空格load data infile 'file://${ip_host}/opt/t.tbl' into table t fields terminated by '|' preserve leading blanks;

（4）加载语句参数preserve trailing blanks，保留字段右端空格load data infile 'file://${ip_host}/opt/t.tbl' into table t fields terminated by '|' preserve trailing blanks;