Functioning postgres query not working in JPA - postgresql

Question

I've been trying to write a working postgres query in JPA, but I'm getting errors in Intellij and when I run Spring it fails with a generic validation exception.
This is my query in postgres
SELECT
( "header" :: json ) ->> 'company' AS "Company",
LOWER(( "header" :: json ) ->> 'user') AS "User",
MAX ( ( "header" :: json ) ->> 'version' ) AS "Version",
MIN ( date_res ) AS "First CN",
MAX ( date_res ) AS "Last CN",
SUM ( CASE WHEN url = '/url-1' AND status = 200 THEN 1 ELSE 0 END ) AS "Survey",
SUM ( CASE WHEN url = '/url-2' AND status = 200 THEN 1 ELSE 0 END ) AS "Work",
SUM ( CASE WHEN url = '/url-3' AND status = 200 THEN 1 ELSE 0 END ) AS "Home",
SUM ( CASE WHEN url = '/url-4' AND status = 200 THEN 1 ELSE 0 END ) AS "DeploySurvey",
SUM ( CASE WHEN url = '/url-5' AND status = 200 THEN 1 ELSE 0 END ) AS "DeployWork"
FROM
"public"."seg_ws_log_res"
INNER JOIN "seg_company" ON ("seg_company"."companyName" = ( "header" :: json ) ->> 'company')
WHERE
"service" = 'service'
AND NOT ( "header" :: json ) ->> 'company' IS NULL
AND NOT ( "header" :: json ) ->> 'user' IS NULL
AND NOT ( "header" :: json ) ->> 'company' = ''
AND NOT UPPER(( "header" :: json ) ->> 'user') IN ('USER_1', 'USER_2')
AND NOT ( "header" :: json ) ->> 'version' = 'Dev'
AND NOT UPPER(( "header" :: json ) ->> 'company') IN ('text_1','text_2','text_3')
GROUP BY
"Company",
"User"
ORDER BY
"Company",
"User";
This is my #Query code
#Query(value = "SELECT " +
"cast(log.header as json) ->> 'company' AS \"Company\"," +
"LOWER(cast(log.header as json) ->> 'user') AS \"User\"," +
"MAX ( cast(log.header as json) ->> 'version' ) AS \"Version\"," +
"MIN (log.dateRes) AS \"First CN\"," +
"MAX ( log.dateRes ) AS \"Last CN\"," +
"SUM ( CASE WHEN log.url = '/url-1' AND log.status = 200 THEN 1 ELSE 0 END ) AS \"Survey\"," +
"SUM ( CASE WHEN log.url = '/url-2' AND log.status = 200 THEN 1 ELSE 0 END ) AS \"Work\"," +
"SUM ( CASE WHEN log.url = '/url-3' AND log.status = 200 THEN 1 ELSE 0 END ) AS \"Home\"," +
"SUM ( CASE WHEN log.url = '/url-4' AND log.status = 200 THEN 1 ELSE 0 END ) AS \"DeploySurvey\"," +
"SUM ( CASE WHEN log.url = '/url-5' AND log.status = 200 THEN 1 ELSE 0 END ) AS \"DeployWork\"" +
"FROM" +
" SegWsLogResEntity log" +
"INNER JOIN SegCompanyEntity c ON (c.companyName = ( cast(log.header as json)) ->> 'company') " +
"WHERE" +
" log.service = 'service' " +
" AND NOT cast(log.header as json) ->> 'company' IS NULL " +
" AND NOT cast(log.header as json) ->> 'user' IS NULL " +
" AND NOT cast(log.header as json) ->> 'company' = '' " +
" AND NOT UPPER(cast(log.header as json) ->> 'user') IN ('USER_1', 'USER_2') " +
" AND NOT cast(log.header as json) ->> 'version' = 'Dev'" +
" AND NOT UPPER(cast(log.header as json) ->> 'company') IN ('text_1','text_2','text_3')" +
"GROUP BY" +
"\"Company\"," +
"\"User\"" +
"ORDER BY" +
"\"Company\"," +
"\"User\"")
In this line:
cast(log.header ->> 'company' as json) AS \"Company\"
in the operator --> the IDE indicates:
<expression> expected, got '>'
LOWER(cast(log.header as json) ->> 'user') AS \"User\"
In this line:
"MIN (log.dateRes) AS \"First CN\","
The IDE indicates:
identifier expected, got '"First CN"'
the same for the each identifier until the from
And in this line
"INNER JOIN SegCompanyEntity c ON (c.companyName = ( \"header\" :: json ) ->> 'company') " +
After the ON the IDE indicates
'(', , FUNCTION or identifier expected, got '('
I have gone through many posts about JPA and native queries but none seem to be similar to my problem.

Answer 1

The query you define in the jpa-#Query annotations is by default a JPQL query. JPQL doesn't understand Postgres (or any other DB) specific features e.g. Postgres' Json(b) type.
There is a flag nativeQuery in the #Query annotation. You can set this to true -- then your query won't be interpreted as JPQL but as native SQL. Obviously, this way, the query will only work with postgres.
#Query(
nativeQuery = true,
value = "SELECT..."
)