dolphin-字面值字符串文本相比于原始的openGauss,dolphin对于字符串文本的修改主要为:相邻放置的带引号的字符串连接为一个字符串。示例:openGauss=# select 'a string' as col; col ---------- a string (1 row) openGauss=# select 'a' ' ' 'string' as col; col ---------- a string (1 row)