Hi Chad,
The errors were different in the different cases.

I am providing the requested information:

Kind regards:
al_shopov

1. I am using Beehive 1.0.2
2. PostgresSQL 8.2
3. Sun JDK 1.5
4. apache-tomcat-5.5.23
5. JDBC driver - postgresql-8.1-408.jdbc3.jar

Relevant JDBC control source:
-----------------------------
        @SQL(statement="insert into test (id, date) values ({id}, {date})")
        public void insertIntoTestString(int id, String date);
        
        @SQL(statement="insert into test (id, date) values ({id}, {d {date}})")
        public void insertIntoTestStringEscaped(int id, String date);
        
        @SQL(statement="insert into test (id, date) values ({id}, {date})")
        public void insertIntoTestDate(int id, Date date);

        @SQL(statement="insert into test (id, date) values ({id}, {d {date}})")
        public void insertIntoTestDateEscaped(int id, Date date);
        
Relevent Controller source:
------------------------------
        @Jpf.Action(forwards = { @Jpf.Forward(name = "success", path = 
"showDates.jsp")})
        public Forward processDate(){
                int i = invoiceControl.getMaxIdTest();
                

                java.sql.Date nullDate = null;
                String emptyString = "";
                String nullString = null;
                
                i++;
                try {invoiceControl.insertIntoTestDate(i, nullDate);}
                catch (Exception e)     {log.error("insertIntoTestDate - 
nullDate", e);}
                
                i++;
                try {invoiceControl.insertIntoTestDateEscaped(i, nullDate);}
                catch (Exception e)     {log.error("insertIntoTestDateEscaped - 
nullDate", e);}
                
                i++;
                try {invoiceControl.insertIntoTestString(i, nullString);}
                catch (Exception e) {log.error("insertIntoTestString - 
nullString", e);}
                
                i++;
                try {invoiceControl.insertIntoTestStringEscaped(i, nullString);}
                catch (Exception e) {log.error("insertIntoTestStringEscaped - 
nullString", e);}
                
                i++;
                try {invoiceControl.insertIntoTestString(i, emptyString);} 
                catch (Exception e) {log.error("insertIntoTestString - 
emptyString", e);}
                
                i++;
                try {invoiceControl.insertIntoTestStringEscaped(i, 
emptyString);} 
                catch (Exception e) {log.error("insertIntoTestStringEscaped - 
emptyString", e);}
                

                Map[] m = invoiceControl.getAllDates();
                Forward f = new Forward("success");
                f.addActionOutput("list", m);
                return f;
        }

Relevant log messages, I've cut out some of the stactrace and have substituted
with .... ....:
--------------------------------

2007-07-18 13:57:50,314 ERROR esign.invoices.admin.Controller -
insertIntoTestDate - nullDate
java.lang.reflect.UndeclaredThrowableException
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestDate(InvoiceControlBean.java:249)
        at esign.invoices.admin.Controller.processDate(Controller.java:244)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
.... ....
Caused by: org.postgresql.util.PSQLException: ERROR: column "date" is of type
date but expression is of type character varying
        at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1531)
        at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1313)
        at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:452)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:354)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:347)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.execPreparedStatement(JdbcControlImpl.java:290)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.invoke(JdbcControlImpl.java:224)
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestDate(InvoiceControlBean.java:234)
        ... 41 more
        
2007-07-18 13:57:50,317 ERROR esign.invoices.admin.Controller -
insertIntoTestDateEscaped - nullDate
java.lang.reflect.UndeclaredThrowableException
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestDateEscaped(InvoiceControlBean.java:405)
        at esign.invoices.admin.Controller.processDate(Controller.java:248)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
.... ....
Caused by: org.postgresql.util.PSQLException: ERROR: syntax error at or near 
"$2"
        at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1531)
        at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1313)
        at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:452)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:354)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:347)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.execPreparedStatement(JdbcControlImpl.java:290)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.invoke(JdbcControlImpl.java:224)
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestDateEscaped(InvoiceControlBean.java:390)
        ... 41 more
        
2007-07-18 13:57:50,320 ERROR esign.invoices.admin.Controller -
insertIntoTestString - nullString
java.lang.reflect.UndeclaredThrowableException
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestString(InvoiceControlBean.java:524)
        at esign.invoices.admin.Controller.processDate(Controller.java:252)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
.... ....
Caused by: org.postgresql.util.PSQLException: ERROR: column "date" is of type
date but expression is of type character varying
        at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1531)
        at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1313)
        at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:452)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:354)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:347)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.execPreparedStatement(JdbcControlImpl.java:290)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.invoke(JdbcControlImpl.java:224)
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestString(InvoiceControlBean.java:509)
        ... 41 more
        
2007-07-18 13:57:50,323 ERROR esign.invoices.admin.Controller -
insertIntoTestStringEscaped - nullString
java.lang.reflect.UndeclaredThrowableException
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestStringEscaped(InvoiceControlBean.java:368)
        at esign.invoices.admin.Controller.processDate(Controller.java:256)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
.... ....
Caused by: org.postgresql.util.PSQLException: ERROR: syntax error at or near 
"$2"
        at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1531)
        at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1313)
        at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:452)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:354)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:347)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.execPreparedStatement(JdbcControlImpl.java:290)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.invoke(JdbcControlImpl.java:224)
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestStringEscaped(InvoiceControlBean.java:353)
        ... 41 more
        
2007-07-18 13:57:50,327 ERROR esign.invoices.admin.Controller -
insertIntoTestString - emptyString
java.lang.reflect.UndeclaredThrowableException
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestString(InvoiceControlBean.java:524)
        at esign.invoices.admin.Controller.processDate(Controller.java:260)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
.... ....
Caused by: org.postgresql.util.PSQLException: ERROR: column "date" is of type
date but expression is of type character varying
        at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1531)
        at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1313)
        at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:452)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:354)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:347)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.execPreparedStatement(JdbcControlImpl.java:290)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.invoke(JdbcControlImpl.java:224)
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestString(InvoiceControlBean.java:509)
        ... 41 more
        
2007-07-18 13:57:50,343 ERROR esign.invoices.admin.Controller -
insertIntoTestStringEscaped - emptyString
java.lang.reflect.UndeclaredThrowableException
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestStringEscaped(InvoiceControlBean.java:368)
        at esign.invoices.admin.Controller.processDate(Controller.java:264)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
.... ....
Caused by: org.postgresql.util.PSQLException: ERROR: syntax error at or near 
"$2"
        at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1531)
        at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1313)
        at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:452)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:354)
        at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:347)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.execPreparedStatement(JdbcControlImpl.java:290)
        at
org.apache.beehive.controls.system.jdbc.JdbcControlImpl.invoke(JdbcControlImpl.java:224)
        at
eu.horizon_it.invoices.controls.InvoiceControlBean.insertIntoTestStringEscaped(InvoiceControlBean.java:353)
        ... 41 more

        

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