How to Escape the Colon Character in JPA Native Queries?

Escaping the '':' Character in JPA Queries

When attempting to run native JPA queries that utilize the colon (':') character, you may encounter an error prohibiting the use of space after the colon. This can be a frustrating issue, especially when dealing with specific scenarios such as the one described in the question.

Escaping these characters with backslashes () or doubling them up has proven ineffective. To resolve this problem, consider the following solution:

As demonstrated in the answer provided, escaping the colons with a double backslash () allows JPA to correctly interpret the query. By doing so, the named parameter ':json' becomes properly recognized, and the query can be executed successfully.

Applying this solution to the example provided in the question, the modified query would be as follows:

SELECT foo, bar, baz, \@rownum:= if (\@id = foo, \@rownum+1, 1) as rownum, \@id    := foo                         as rep_id
FROM
    foo_table
ORDER BY
    foo,
    bar desc

By implementing this fix, you can effectively escape the colon character and run your native JPA query without encountering the previous error.

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