如何使用 {} 在 JPA 查询中传递列表参数

Question

Below query is wokring in postgres SQL and giving required result, but when trying from JAVA it is giving error.

select * from res where 
'{"^\\d{3}\\d{1,}133\\d{1,}$","^\\d{3}7483"}' is null
or exists (select from unnest(cast('{"^\\d{3}\\d{1,}133\\d{1,}$","^\\d{3}7483"}' as text[])) rx where cast (r.res_value as text) ~ rx);

java code:-

@Query(value = "select * from res where 
'{?1 is null
or exists (select from unnest(cast(?1 as text[])) rx where cast (r.res_value as text) ~ rx)",nativeQuery = true)
public List<Res> getData(List<String> patterns);

List of patterns = 
^\\d{3}\\d{1,}133\\d{1,}$
^\\d{3}7483

Error getting - "ERROR: malformed array literal: ^\\d{3}\\d{1,}133\\d{1,}$ Detail: Array value must start with "{" or dimension information.

How i can add { } to these.. any solution in JPA

Answer 1

It's better to convert the List of String to String in java and pass it as String param to the JPA Query.

Step 1: Convert List of String to String in java before passing to JPA
Java: String patternsStr = patterns.stream().map(p -> "\\"" + p + "\\"").collect(Collectors.joining(",", "{", "}"));

Step 2: Change the type of parameter from List to String in @Query method
JPA: public List<Res> getData(String patternsStr);

The postgres SQL query you mentioned is accepting regx array as string. So it's easy to pass the regx list as string to JPA Query.