Using a date field in a JDOQL query crashes

Question

Hello:
I am trying to use a date field in a JDOQL filter. It appears from the
log file that the date is not being substituted into the SQL.
It is not clear from the JDOQL spec how to do date queries.... doing date
queries in SQL involves several special operators, yet the
JDOQL defines the ">" and "<" operators as working on dates....and there is
no mention of date specific operators so I am hoping that I
can do a filter where I compare a date to an input parameter date using the
">" and "<" operators...
I have enclosed a copy of my driver code, followed by an except of my class
that contains the date, followed by the kodo exception log
I can't see where I am doing anything that violates the JDOQL spec and I
don't see any other way of doing date comparisions.
Brian
Here is the driver code that I am attempting:
public void getDateRange ()
PersistenceManager pm = JDOFactory.getPersistenceManager ();
String filter = "leafDates.contains (cdate) & cdate.statusName ==
myStatus & cdate.datePhaseStarted > myDate";
Date date = new Date ();
Calendar calendar = new GregorianCalendar (TimeZone.getDefault ());
calendar.set (2002, Calendar.DECEMBER, 26);
date=calendar.getTime();
Extent extent = pm.getExtent (LeafBase.class, false);
Query query = pm.newQuery (LeafBase.class, filter);
query.declareImports ("import aqueduct.*; import java.util.Date");
query.declareVariables ("aqueduct.LeafDate cdate; Date myDate");
query.declareParameters ("String myStatus");
System.out.println ("dated used = " + date);
Collection results = (Collection) query.execute ("closed", date);
Iterator iter = results.iterator ();
while (iter.hasNext () ) {
LeafBase myLeaf = (LeafBase) iter.next ();
System.out.println ("My leaf = " + myLeaf);
pm.close ();
Here is the class:
public class LeafDate implements Serializable
// *******The Attributes***************
private Date datePhaseStarted = null;
private boolean isEstimatedDate = false;
//mark this as non-persistent in the JDO metadata
private StatusType status = null;
//put here to enable one-to-many mapping using a single table in JDO
private LeafBase parent = null;
Here is the error I am getting:
C:\bcs\jdo\kodo-jdo-2.4.0\aqueduct>java aqueduct.DealMaint dated used = Thu
Dec 26 08:47:33 CST 2002
Exception in thread "main" javax.jdo.JDODataStoreException:
com.solarmetric.kodo.impl.jdbc.sql.SQLExceptionWrapper:
[SQL=SELECT DISTINCT t0.ID, t0.JDOCLASS, t0.IS_CONFLICT, t0.CURRENCYX,
t0.DEALPARENTX, t0.PARENTX, t0.PRODUCTKIND, t0.T_SIZE, t0.STATUSNAME FROM
JDO_DATE t1, JDO_LEAF t0 WHERE ((t1.STATUSNAME = 'closed' AND t1.DATESTARTED
*variable*) AND t0.ID = t1.PARENTX) PRE=SELECT DISTINCT t0.ID,
t0.JDOCLASS, t0.IS_CONFLICT, t0.CURRENCYX, t0.DEALPARENTX, t0.PARENTX,
t0.PRODUCTKIND, t0.T_SIZE, t0.STATUSNAME FROM JDO_DATE t1, JDO_LEAF t0 WHERE
((t1.STATUSNAME = ? AND t1.DATESTARTED > *variable*) AND t0.ID =
t1.PARENTX)
ORA-00936: missing expression
[code=936;state=42000]
NestedThrowables:com.solarmetric.kodo.impl.jdbc.sql.SQLExceptionWrapper:
[SQL=SELECT DISTINCT t0.ID, t0.JDOCLASS, t0.IS_CONFLICT, t0.CURRENCYX,
t0.DEALPA RENTX, t0.PARENTX, t0.PRODUCTKIND, t0.T_SIZE, t0.STATUSNAME FROM
JDO_DATE t1, JD O_LEAF t0 WHERE ((t1.STATUSNAME = 'closed' AND
t1.DATESTARTED > *variable*) AND t0.ID = t1.PARENTX)] [PRE=SELECT DISTINCT
t0.ID, t0.JDOCLASS, t0.IS_CONFLICT, t0.CURRENCYX, t0.DEALPA RENTX,
t0.PARENTX, t0.PRODUCTKIND, t0.T_SIZE, t0.STATUSNAME FROM JDO_DATE t1, JD
O_LEAF t0 WHERE ((t1.STATUSNAME = ? AND t1.DATESTARTED > *variable*) AND
t0.ID = t1.PARENTX)]
ORA-00936: missing expression
at
com.solarmetric.kodo.impl.jdbc.runtime.SQLExceptions.throwDataStore(SQLExcep
tions.java:23)
at
com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.executeQuery(JDBCSto
reManager.java:742)
at
com.solarmetric.kodo.impl.jdbc.runtime.JDBCQuery.executeQuery(JDBCQuery.java
:92)
at com.solarmetric.kodo.query.QueryImpl.executeWithMap(QueryImpl.java:792)
at com.solarmetric.kodo.query.QueryImpl.executeWithArray(QueryImpl.java:668)
at com.solarmetric.kodo.query.QueryImpl.execute(QueryImpl.java:623)
at aqueduct.DealMaint.getDateRange(DealMaint.java:523)
at
aqueduct.DealMaint.main(DealMaint.java:35)NestedThrowablesStackTrace:java.sq
l.SQLException:
ORA-00936: missing expression
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:169)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:208)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:543)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1405)
at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteDescribe(TTC7Protocol.java:643)
at
oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.java:1819)
at
oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java
:2015)
at
oracle.jdbc.driver.OraclePreparedStatement.doScrollPstmtExecuteUpdate(Oracle
PreparedStatement.java:3021)
at
oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedState
ment.java:416)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePrepare

Answer 1

Oh, thanks for pointing this out.... I got caught up in trying to figure out
the date issues, I missed the obvious.
Brian
"Patrick Linskey" <[email protected]> wrote in message
news:[email protected]...
Brian,
The problem is that you're declaring myDate as a variable instead of a
parameter. Yes, we should be doing better error checking. But that's the
problem.
So, change your declareVariables() and declareParameters() statements
accordingly, and all should work out.
-Patrick
Brian Smith wrote:
Here is the driver code that I am attempting:
public void getDateRange ()
PersistenceManager pm = JDOFactory.getPersistenceManager ();
String filter = "leafDates.contains (cdate) & cdate.statusName ==
myStatus & cdate.datePhaseStarted > myDate";
Date date = new Date ();
Calendar calendar = new GregorianCalendar (TimeZone.getDefault
>>
calendar.set (2002, Calendar.DECEMBER, 26);
date=calendar.getTime();
Extent extent = pm.getExtent (LeafBase.class, false);
Query query = pm.newQuery (LeafBase.class, filter);
query.declareImports ("import aqueduct.*; importjava.util.Date");
>>
query.declareVariables ("aqueduct.LeafDate cdate; Date myDate");
query.declareParameters ("String myStatus");
System.out.println ("dated used = " + date);
Collection results = (Collection) query.execute ("closed", date);
Iterator iter = results.iterator ();
while (iter.hasNext () ) {
LeafBase myLeaf = (LeafBase) iter.next ();
System.out.println ("My leaf = " + myLeaf);
pm.close ();
>
Here is the class:
public class LeafDate implements Serializable
// *******The Attributes***************
private Date datePhaseStarted = null;
private boolean isEstimatedDate = false;
//mark this as non-persistent in the JDO metadata
private StatusType status = null;
//put here to enable one-to-many mapping using a single table in JDO
private LeafBase parent = null;
>
Here is the error I am getting:
C:\bcs\jdo\kodo-jdo-2.4.0\aqueduct>java aqueduct.DealMaint dated used
= Thu
Dec 26 08:47:33 CST 2002
Exception in thread "main" javax.jdo.JDODataStoreException:
com.solarmetric.kodo.impl.jdbc.sql.SQLExceptionWrapper:
[SQL=SELECT DISTINCT t0.ID, t0.JDOCLASS, t0.IS_CONFLICT, t0.CURRENCYX,
t0.DEALPARENTX, t0.PARENTX, t0.PRODUCTKIND, t0.T_SIZE, t0.STATUSNAMEFROM> > JDO_DATE t1, JDO_LEAF t0 WHERE ((t1.STATUSNAME = 'closed' AND> > t1.DATESTARTED> >> > >*variable*) AND t0.ID = t1.PARENTX) [PRE=SELECT DISTINCT t0.ID,
>
ORA-00936: missing expression
[code=936;state=42000]
NestedThrowables:com.solarmetric.kodo.impl.jdbc.sql.SQLExceptionWrapper:
[SQL=SELECT DISTINCT t0.ID, t0.JDOCLASS, t0.IS_CONFLICT, t0.CURRENCYX,
t0.DEALPA RENTX, t0.PARENTX, t0.PRODUCTKIND, t0.T_SIZE, t0.STATUSNAMEFROM
JDO_DATE t1, JD O_LEAF t0 WHERE ((t1.STATUSNAME = 'closed' AND
t1.DATESTARTED > variable) AND t0.ID = t1.PARENTX)] [PRE=SELECTDISTINCT
t0.ID, t0.JDOCLASS, t0.IS_CONFLICT, t0.CURRENCYX, t0.DEALPA RENTX,
t0.PARENTX, t0.PRODUCTKIND, t0.T_SIZE, t0.STATUSNAME FROM JDO_DATE t1,JD
O_LEAF t0 WHERE ((t1.STATUSNAME = ? AND t1.DATESTARTED > variable) AND
t0.ID = t1.PARENTX)]
ORA-00936: missing expression
at
com.solarmetric.kodo.impl.jdbc.runtime.SQLExceptions.throwDataStore(SQLExcep
tions.java:23)
at
com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.executeQuery(JDBCSto
reManager.java:742)
at
com.solarmetric.kodo.impl.jdbc.runtime.JDBCQuery.executeQuery(JDBCQuery.java
:92)
atcom.solarmetric.kodo.query.QueryImpl.executeWithMap(QueryImpl.java:792)
>>
at
com.solarmetric.kodo.query.QueryImpl.executeWithArray(QueryImpl.java:668)
>>
at com.solarmetric.kodo.query.QueryImpl.execute(QueryImpl.java:623)
at aqueduct.DealMaint.getDateRange(DealMaint.java:523)
at
aqueduct.DealMaint.main(DealMaint.java:35)NestedThrowablesStackTrace:java.sq
l.SQLException:
ORA-00936: missing expression
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:169)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:208)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:543)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1405)
at
oracle.jdbc.ttc7.TTC7Protocol.parseExecuteDescribe(TTC7Protocol.java:643)
>>
at
oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.java:1819)
>>
at
oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java
:2015)
at
oracle.jdbc.driver.OraclePreparedStatement.doScrollPstmtExecuteUpdate(Oracle
PreparedStatement.java:3021)
at
oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedState
ment.java:416)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePrepare
Patrick Linskey [email protected]
SolarMetric Inc. http://www.solarmetric.com