either not use XMLPARSE and cast the returned object to XML

or do not use Streaming (or add a way to configure)

I did not understand how to check for DataSource to be reusable?

Amazon s3 csv/xml lookup querry exception ----------------------------------------- Key: TEIID-5093 URL: https://issues.jboss.org/browse/TEIID-5093 Project: Teiid Issue Type: Bug Components: Misc. Connectors Affects Versions: 8.12.x-6.4 Reporter: Mario Majernik Assignee: Steven Hawkins Querry : {code:java} SELECT IntKey, StringKey, lookup('BQT1.SmallB', 'DoubleNum', 'IntKey', IntKey) AS DoubleNum FROM BQT1.SmallA UNION SELECT IntKey, lookup('BQT1.SmallA', 'StringKey', 'IntKey', IntKey) AS StringKey, DoubleNum FROM BQT1.SmallA {code} returns TeiidSQLException for csv and xml files from amazon s3. Stacktrace: {code:java} WARN [org.teiid.PROCESSOR] (Worker2_QueryProcessorQueue41) TEIID30020 Processing exception for request 8O9K6VJIjd9y.7 'TEIID30180 java.sql.SQLException: java.sql.SQLException: TEIID60019 Streaming result has already been read once. Ensure that only one read operation needs to be performed, for example XMLPARSE without the WELLFORMED operation must read the entire stream to validate its contents. Or you may choose to use a non-streaming result. '. Originally TeiidProcessingException BinaryWSProcedureExecution.java:78. Enable more detailed logging to see the entire stacktrace. {code} Teiid command log for querry: {code:java} 15:11:34,160 INFO [org.teiid.COMMAND_LOG] (New I/O worker #2) 8O9K6VJIjd9y START USER COMMAND: startTime=2017-10-09 15:11:34.16 requestID=8O9K6VJIjd9y.7 txID=null sessionID=8O9K6VJIjd9y applicationName=JDBC principal=user@teiid-security vdbName=csv vdbVersion=1 sql=SELECT IntKey, StringKey, lookup('BQT1.SmallB', 'DoubleNum', 'IntKey', IntKey) AS DoubleNum FROM BQT1.SmallA UNION SELECT IntKey, lookup('BQT1.SmallA', 'StringKey', 'IntKey', IntKey) AS StringKey, DoubleNum FROM BQT1.SmallA 15:11:34,192 DEBUG [org.teiid.COMMAND_LOG] (Worker0_QueryProcessorQueue40) 8O9K6VJIjd9y START DATA SRC COMMAND: startTime=2017-10-09 15:11:34.192 requestID=8O9K6VJIjd9y.7 sourceCommandID=6 executionID=2 txID=null modelName=sourceModel translatorName=user-s3 sessionID=8O9K6VJIjd9y principal=user@teiid-security sql=EXEC sourceModel.getTextFile('csv/smallaCsv.csv') 15:11:34,856 DEBUG [org.teiid.COMMAND_LOG] (Worker2_QueryProcessorQueue41) 8O9K6VJIjd9y END SRC COMMAND: endTime=2017-10-09 15:11:34.856 requestID=8O9K6VJIjd9y.7 sourceCommandID=6 executionID=2 txID=null modelName=sourceModel translatorName=user-s3 sessionID=8O9K6VJIjd9y principal=user@teiid-security finalRowCount=1 cpuTime(ns)=34673443 15:11:34,862 INFO [org.teiid.COMMAND_LOG] (Worker2_QueryProcessorQueue41) 8O9K6VJIjd9y ERROR USER COMMAND: endTime=2017-10-09 15:11:34.862 requestID=8O9K6VJIjd9y.7 txID=null sessionID=8O9K6VJIjd9y principal=user@teiid-security vdbName=csv vdbVersion=1 finalRowCount=null 15:11:34,876 INFO [org.teiid.COMMAND_LOG] (Worker2_QueryProcessorQueue41) 8O9K6VJIjd9y END USER COMMAND: endTime=2017-10-09 15:11:34.876 requestID=8O9K6VJIjd9y.7 txID=null sessionID=8O9K6VJIjd9y principal=user@teiid-security vdbName=csv vdbVersion=1 finalRowCount=0 {code}