Groovy sql to byte - postgresql

Question

I have to get a document that's stored in a postgres database and put it into a byte array.
In Java this works just fine
PreparedStatement ps = conn1.prepareStatement("SELECT document FROM documents WHERE documentname = ?");
ps.setString(1, "dingbatdocument.docx");
ResultSet rs = ps.executeQuery();
while (rs.next()) {
byte[] documentBytes = rs.getBytes(1);
}
but I have to use groovy for this code and know nothing about how to do it, so far I've tried this
def newSpelling = "dingbatdocument.docx";
def val = sql.execute("SELECT document FROM documents WHERE documentname = ?", [newSpelling]) as byte[];
and get this error:
Caused by: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'true' with class 'java.lang.Boolean' to class 'byte'
at korg.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToNumber(DefaultTypeTransformation.java:146)
which to me says it is trying to asset that it has worked rather than giving me and actual byte array,
and this
def newSpelling = "dingbatdocument.docx";
byte[] val = sql.execute("SELECT document FROM documents WHERE documentname = ?", [newSpelling]);
and get this error:
Groovy script throws an exception of type class org.postgresql.util.PSQLException with message = This ResultSet is closed.
and finally this:
def reqdColName = "document";
def reqdDocument = "dingbatdocument.docx";
def query1 = "SELECT $reqdColName FROM documents WHERE documentname = '$reqdDocument'";
def documentBytes = conn1.executeQuery(query1).getArray(reqdColName);
which also gives me
Groovy script throws an exception of type class org.postgresql.util.PSQLException with message = This ResultSet is closed.
So my question is how do I get the same result in groovy as I do in java, a byte[] variable from my sql resultset?
Thanks in advance.

Answer 1

In the end it was quite easy, but not knowing Groovy it's different. Here is how I did it in the end,
def reqdColName = "document";
def reqdDocument = "documentName.docx";
def query1 = "SELECT * FROM documents WHERE documentname = '$reqdDocument'";
byte[] myData;
conn1.eachRow(query1){
row ->
if(debug){logger.severe(dI+thisTrace+"myData \n"
+"\t"+row.documentid+"\n"
+"\t"+row.documentname
+"\t"+row.versionmajor +"\n"
+"\t"+row.versionminor +"\n"
+"\t"+row.versionmini +"\n"
+"\t"+row.uploader +"\n"
+"\t"+row.approver +"\n"
+"\t"+row.uploaddate +"\n"
+"\t"+row.approvaldate +"\n"
// +"\t"+row.document+"\n"
);}
myData = row.document
}
myData is the byte[] repesentation of the document I needed.