从SQL到HQL的“开始于”和“按优先级连接”

Question

I need to find a way to get the ids starting with 11, in sql is with 'start with' and 'Connect by prior' but in HQL, how can I do that?, if there is a better way in grails, the help would be great, thanks!

(Updated: Sorry, I didn't write the other command which is: 'connect by prior')

Answer 1

Assuming the ID is a string, why not simply use a like clause:

where id like '11%'

Assuming it's not a string, you could cast it to a string:

where cast(id as STRING) like '11%'

or

where str(id) like '11%'

Answer 2

如果您的意思是查询ID大于或等于11的记录，那么例如，如果您有一个Books表，则HQL为

def books = Books.executeQuery("SELECT b from Books b WHERE id >= 11")

Answer 3

Recursive SQL queries are non-standard so HQL does not support them (although I found a paper that appears to propose and prototype adding support). To do them you'll need to stick with SQL. Here's a similar question .