Retrieving results from ARRAY and ROW
От | Andreas Joseph Krogh |
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Тема | Retrieving results from ARRAY and ROW |
Дата | |
Msg-id | 200907070214.01001.andreak@officenet.no обсуждение исходный текст |
Ответы |
Re: Retrieving results from ARRAY and ROW
|
Список | pgsql-jdbc |
Hi all! (Using pg-8.4 with postgresql-8.4-701.jdbc4.jar) I have the following (simplified for example) schema: CREATE TABLE person(id INTEGER, name VARCHAR); INSERT INTO person(id, name) VALUES (1,'James'),(2, 'Jack'); CREATE TABLE person_dep(person_id INTEGER, dep VARCHAR); INSERT INTO person_dep(person_id, dep) VALUES (1,'Dep1'),(1,'Dep2'); SELECT p.id, p.name , ARRAY(SELECT ROW(dep.person_id, dep.dep) FROM person_dep dep WHERE dep.person_id = p.id) AS my_array FROM person p WHERE p.id IN (1,2); id | name | my_array ----+-------+------------------------- 1 | James | {"(1,Dep1)","(1,Dep2)"} 2 | Jack | {} (2 rows) The problem is that I'm not able to retrieve the results from "my_array" using rs.getArray("my_array").getArray(), whichresults in: org.postgresql.util.PSQLException: Method org.postgresql.jdbc4.Jdbc4Array.getArrayImpl(long,int,Map) is not yet implemented. Does someone know any better way to write this query which makes it work with JDBC? I know I can write 2 sub-selects insteadof one and have each column return and array of integer[] and varchar[], but I'm trying to avoid having more than*one* sub-select. My actual query involves a "WITH RECURSIVE" sub-select which retrieves <id,name> pairs for the parent of each node to forma path up to the top-most parent, which makes several sub-selects involving CTE unattractive. -- Andreas Joseph Krogh <andreak@officenet.no> Senior Software Developer / CTO ------------------------+---------------------------------------------+ OfficeNet AS | The most difficult thing in the world is to | Rosenholmveien 25 | know how to do a thing and to watch | 1414 Trollåsen | somebody else doing it wrong, without | NORWAY | comment. | | | Tlf: +47 24 15 38 90 | | Fax: +47 24 15 38 91 | | Mobile: +47 909 56 963 | | ------------------------+---------------------------------------------+
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