harlequin :
I've been working on this specific problem now for a few days and can't find any solutions. Thus, here I am.
The situation:
- Table1 lists all JBoss on the system
- Table2 pictures a 1:n relation of JBoss and JBoss since any given JBoss can have one or more JBoss it 'speaks' to.
- I have a Java servlet with JDBC to connect to the database and issue queries and .jsp pages to display the results
EDIT:
What do I intend to do with the query: My servlet is trying to display all the information connected to a given jboss. The user selects a jboss from the list of jboss names from a jsp page. Then the query is executed and the error occurs.
EDIT2:
Changing the query to inner subselect to a where in results in the same error when testing the applet
EDIT4:
Tried creating a view with the query as script, then trying to get all entries from the created view with select * from vtest without success.
The Problem:
When I try to run the following select with the servlet, it results in ORA-01427. If I run this statement in Toad for Oracle I get the desired result.
select * from table1 where number in (
select jboss2 from table2 where jboss1 = (
select number from table1 where name = 'nam1'))
The Question:
Is there something I'm missing with the query? Is it possible that jdbc can't handle subqueries with multiple rows as result, even if the query itself is correct?
Table 1:
+--------+------+-----------+
| Number | Name | values... |
+--------+------+-----------+
| 000001 | nam1 | vals1 |
| 000002 | nam2 | vals2 |
| 000003 | nam3 | vals3 |
+--------+------+-----------+
Table 2:
+--------+--------+
| JBoss1 | JBoss2 |
+--------+--------+
| 000001 | 000002 |
| 000001 | 000003 |
| 000002 | 000003 |
+--------+--------+
Result in Toad/Desired result:
+--------+------+-----------+
| Number | Name | values... |
+--------+------+-----------+
| 000002 | nam2 | vals2 |
| 000003 | nam3 | vals3 |
+--------+------+-----------+
EDIT3:
Relevant Java classes. Omitted nonrelevant queries.
class QuickInfoAction implements Action{
@Override
public String execute(HttpServletRequest request, HttpServletResponse response) throws ActionException {
Connection conn = null;
PreparedStatement prep = null;
ResultSet rs = null;
Map<String,String> queries = Queries.getInfoQueries(request);
try {
conn = DatabaseConnector.getConnection();
Map<String, Result> res = new HashMap<String, Result>();
for (Map.Entry<String, String> entry: queries.entrySet()) {
prep = conn.prepareStatement(entry.getValue());
rs = prep.executeQuery();
while(rs.next()) {
res.put(entry.getKey(), ResultSupport.toResult(rs));
}
}
request.setAttribute("results", res);
} catch (Exception e) {
throw new ActionException(e.getStackTrace().toString());
} finally {
try {
conn.close();
prep.close();
rs.close();
} catch (Exception e) {
throw new ActionException(e.getStackTrace().toString());
}
}
return "results";
}
}
public static Map<String, String> getInfoQueries(HttpServletRequest request) {
String jboss_res = "select jboss.name, jboss.port, jboss.apache_nummer, jboss.bere_mandant_id, "
+ "maschine.name as maschine, maschine.ip_adresse "
+ "from jboss "
+ "inner join maschine on jboss.maschine_nummer = maschine.nummer "
+ "where jboss.name = '" + request.getParameter("jboss") + "'";
String jboss_db = "select datenbank.nummer, datenbank.name, db_schema.name as schema "
+ "from datenbank "
+ "inner join db_schema on datenbank.db_schema_nummer = db_schema.nummer "
+ "where datenbank.nummer = ("
+ "select datenbank_nummer "
+ "from jboss_datenbank "
+ "where jboss_nummer = ("
+ "select nummer "
+ "from jboss "
+ "where name = '" + request.getParameter("jboss") + "'))";
String jboss_tux = "select tuxedo.*, datenbank.name as datenbank, db_schema.name as schema "
+ "from tuxedo, datenbank,db_schema "
+ "where tuxedo.nummer = ("
+ "select tuxedo_nummer "
+ "from jboss "
+ "where name = '" + request.getParameter("jboss") + "') "
+ "and datenbank.nummer = ("
+ "select datenbank_nummer "
+ "from tuxedo_datenbank "
+ "where tuxedo_nummer = tuxedo.nummer) "
+ "and db_schema.nummer = ("
+ "select db_schema_nummer "
+ "from datenbank "
+ "where nummer = ("
+ "select datenbank_nummer "
+ "from tuxedo_datenbank "
+ "where tuxedo_nummer = tuxedo.nummer))";
String jboss_corr = "select * from jboss where nummer in ("
+ "select jboss_nummer_2 from jboss_corr where jboss_nummer_1 in ("
+ "select nummer from jboss where name = '" + request.getParameter("jboss") + "'))";
Map<String, String> queries = new HashMap<String,String>();
queries.put("jboss", jboss_res);
queries.put("datenbank", jboss_db);
queries.put("tuxedo", jboss_tux);
queries.put("corr", jboss_corr);
return queries;
Error Message
03.07.2017 11:49:29,863 +0200 WARN [at.itsv.ta2mig.jdbc.TA2MigOracleJDBCConnection] (hs0903 http-/0.0.0.0:8080-2) ORA-01427: Unterabfrage für eine Zeile liefert mehr als eine Zeile
03.07.2017 11:49:29,864 +0200 INFO [stdout] (hs0903 http-/0.0.0.0:8080-2) error executing action
03.07.2017 11:49:29,864 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) dbgr.exception.ActionException: [Ljava.lang.StackTraceElement;@46708550
03.07.2017 11:49:29,864 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at dbgr.action.QuickInfoAction.execute(QuickInfoAction.java:43)
03.07.2017 11:49:29,864 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at dbgr.servlet.ControllerServlet.doGet(ControllerServlet.java:28)
03.07.2017 11:49:29,865 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at dbgr.servlet.ControllerServlet.doPost(ControllerServlet.java:39)
03.07.2017 11:49:29,865 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
03.07.2017 11:49:29,865 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
03.07.2017 11:49:29,865 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295)
03.07.2017 11:49:29,865 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
03.07.2017 11:49:29,865 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:231)
03.07.2017 11:49:29,866 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149)
03.07.2017 11:49:29,866 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169)
03.07.2017 11:49:29,866 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:150)
03.07.2017 11:49:29,866 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97)
03.07.2017 11:49:29,866 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102)
03.07.2017 11:49:29,866 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
03.07.2017 11:49:29,866 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:854)
03.07.2017 11:49:29,867 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653)
03.07.2017 11:49:29,867 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:926)
03.07.2017 11:49:29,867 +0200 ERROR [stderr] (hs0903 http-/0.0.0.0:8080-2) at java.lang.Thread.run(Thread.java:744)
harlequin :
I found the solution. Another query also returned more than one result. This query was not designed to do so, thus failed. It was an oversight on my part.
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