GAUSS-00301 -- GAUSS-00310
GAUSS-00301: "EXECUTE DIRECT cannot execute this utility query"
SQLSTATE: 0A000
错误原因：EXECUTE DIRECT ON ( nodename [, ... ] ) query语法中在DN上执行了DDL语句。
解决办法：在EXECUTE DIRECT ON ( nodename [, ... ] ) query语法中不能执行DDL语句，目前只支持SELECT语句。
GAUSS-00302: "EXECUTE DIRECT cannot execute locally this utility query"
SQLSTATE: 0A000
错误原因：特性不支持：EXECUTE DIRECT ON ( nodename [, ... ] ) query语法中在DN上执行了Set变量语句。
解决办法：在EXECUTE DIRECT ON ( nodename [, ... ] ) query语法中不能执行Set变量语句，目前只支持SELECT语句。
GAUSS-00303: "SELECT FOR UPDATE/SHARE is not allowed with DISTINCT clause"
SQLSTATE: 0A000
错误原因：SELECT FOR UPDATE/SHARE不支持DISTINCT子句。
解决办法：修改语句。
GAUSS-00304: "SELECT FOR UPDATE/SHARE is not allowed with GROUP BY clause"
SQLSTATE: 0A000
错误原因：SELECT ... FOR UPDATE/SHARE不支持GROUP BY子句。
解决办法：修改SELECT ... FOR UPDATE/SHARE语句。
GAUSS-00305: "SELECT FOR UPDATE/SHARE is not allowed with HAVING clause"
SQLSTATE: 0A000
错误原因：SELECT ... FOR UPDATE/SHARE不支持HAVING子句。
解决办法：修改SELECT ... FOR UPDATE/SHARE语句。
GAUSS-00306: "SELECT FOR UPDATE/SHARE is not allowed with aggregate functions"
SQLSTATE: 0A000
错误原因：SELECT ... FOR UPDATE/SHARE不支持聚合函数。
解决办法：修改SELECT ... FOR UPDATE/SHARE语句。
GAUSS-00307: "SELECT FOR UPDATE/SHARE is not allowed with window functions"
SQLSTATE: 0A000
错误原因：SELECT ... FOR UPDATE/SHARE不支持窗口函数。
解决办法：修改SELECT ... FOR UPDATE/SHARE语句。
GAUSS-00308: "SELECT FOR UPDATE/SHARE is not allowed with set-returning functions in the target list"
SQLSTATE: 0A000
错误原因：SELECT ... FOR UPDATE/SHARE语法的目标列中不支持定义了返回值的函数。
解决办法：修改SELECT ... FOR UPDATE/SHARE语句。
GAUSS-00309: "SELECT FOR UPDATE/SHARE must specify unqualified relation names"
SQLSTATE: 42601
错误原因：SELECT ... FOR UPDATE/SHARE...OF table_name语法中指定的表名存在数据库/模式的引用。
解决办法：修改SELECT ... FOR UPDATE/SHARE...OF table_name语法中指定的表名不能包含database.table或schema.table等引用，只能是一个确定的表名。
GAUSS-00310: "SELECT FOR UPDATE/SHARE cannot be used with column table '%s'"
SQLSTATE: 0A000
错误原因：SELECT ... FOR UPDATE/SHARE...OF table_name语法中指定的表为列存表。
解决办法：SELECT ... FOR UPDATE/SHARE...OF table_name语法中指定的表名不能使用列存表，请修改语法结构。
