[英]PostgreSql 12 JDBC multiple resultset, can only get the first resultset
希望 JDBC 從 PostgreSql 12 function 獲得多個結果集。 JDBC 版本 org.postgresql/postgresql/42.2.9。 PostgreSql function 在這里:
create or replace function test()
returns setof refcursor as $$
declare
ret1 refcursor;
ret2 refcursor;
begin
open ret1 for
select 10 as a;
return next ret1;
open ret2 for
select 20 as b;
return next ret2;
end; $$ language plpgsql;
Java代碼是這樣的:
stmt = getConnection().prepareCall("{ ? = call test() }");
stmt.registerOutParameter(1, Types.OTHER);
stmt.execute();
rs = (ResultSet)stmt.getObject(1);
if (rs.next()) {
int a = rs.getInt("a");
if (rs.next()) {
int b = rs.getInt("b");
}
}
“a”被成功檢索,但第二個“rs.next()”返回 false。 谷歌搜索了很多,但無法使其工作。 如何獲得第二個結果集?
這個鏈接對我幫助很大,問題得到了解決。
...
out ret1 refcursor,
out ret2 refcursor)
returns record as $$
begin
open ret1 for select 10;
open ret2 for select 20;
end; $$ language plpgsql;
Java:
stmt = getConnection().prepareCall("{call test(?,?)}");
stmt.registerOutParameter(1, Types.OTHER);
stmt.registerOutParameter(2, Types.OTHER);
stmt.execute();
ResultSet rs1 = (ResultSet)stmt.getObject(1);
ResultSet rs2 = (ResultSet)stmt.getObject(2);
int a = 0, b = 0;
if (rs1.next()) {
a = rs1.getInt(1);
}
if (rs2.next()) {
b = rs2.getInt(1);
}
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