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https://issues.apache.org/jira/browse/CAMEL-11716?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrea Cosentino reassigned CAMEL-11716:
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Assignee: Andrea Cosentino
> error in handling return parameters in db functions
> ---------------------------------------------------
>
> Key: CAMEL-11716
> URL: https://issues.apache.org/jira/browse/CAMEL-11716
> Project: Camel
> Issue Type: Bug
> Components: camel-sql
> Affects Versions: 2.19.1
> Reporter: Andrea Tarocchi
> Assignee: Andrea Cosentino
> Fix For: 2.18.5, 2.20.0, 2.19.3
>
>
> Let's consider for instance the following db function:
> {code}
> create or replace function sum_two_numbers_function
> (a in number, b in number)
> return number deterministic is
> begin
> return a + b;
> end;
> {code}
> One might think to run this camel route in order to call the mentioned db
> function:
> {code}
> sql-store:sum_two_numbers_function(INTEGER ${body[0]}, INTEGER
> ${body[1]})?function=true
> {code}
> but SqlCall build incorect query:
> {code}
> ? = call sum_two_numbers_function(?)
> {code}
> which fail on wrong number of arguments. After an investigation is found out
> that first parameter was skipped for function calls.
> https://github.com/spring-projects/spring-framework/blob/v4.3.3.RELEASE/spring-jdbc/src/main/java/org/springframework/jdbc/object/SqlCall.java#L135
> So one might try to add one parameter which should be used as output for
> return statement. But the only valid format of parameter (for db functions)
> seems to be {{InputParameter}} which is not possible to use as output for
> result.
> {code}
> sql-store:sum_two_numbers_function(INTEGER ${body[2]}, INTEGER ${body[0]},
> INTEGER ${body[1]})?function=true
> {code}
> If {{OutputParameter}} are used than this
> https://github.com/apache/camel/blob/master/components/camel-sql/src/main/java/org/apache/camel/component/sql/stored/TemplateStoredProcedure.java#L77
> will force to create SQL procedure call (instead of a function one), for
> instance this:
> {code}
> sql-store:sum_two_numbers_function(OUT INTEGER result, INTEGER ${body[0]},
> INTEGER ${body[1]})?function=true
> {code}
> results in this query call:
> {code}
> call sum_two_numbers_function(?, ?, ?)
> {code}
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