PG transport can sendResults before sync ---------------------------------------- Key: TEIID-5658 URL: https://issues.jboss.org/browse/TEIID-5658 Project: Teiid Issue Type: Bug Components: ODBC Reporter: Steven Hawkins Assignee: Steven Hawkins Priority: Major Fix For: 12.1, 12.0.1, 11.2.3 The code is allowing for a sequence of events such as: 2019-02-13 14:07:47.613 org.teiid.ODBC TRACE NIO4 invoking server method: prepare [, select oid from pg_class where relname='pg_class', []] 2019-02-13 14:07:47.615 org.teiid.ODBC TRACE NIO4 invoking client method: org.teiid.transport.ODBCClientInstance$1@d875495 prepareCompleted [] 2019-02-13 14:07:47.615 org.teiid.ODBC TRACE NIO4 invoking server method: bindParameters [, , [], 0, null, UTF-8] 2019-02-13 14:07:47.615 org.teiid.ODBC TRACE NIO4 invoking client method: org.teiid.transport.ODBCClientInstance$1@d875495 bindComplete null 2019-02-13 14:07:47.617 org.teiid.ODBC TRACE NIO4 invoking server method: getResultSetMetaDataDescription [] 2019-02-13 14:07:47.617 org.teiid.ODBC TRACE NIO4 invoking client method: org.teiid.transport.ODBCClientInstance$1@d875495 sendResultSetDescription [[org.teiid.odbc.PGUtil$PgColInfo@1086babd], null] 2019-02-13 14:07:47.617 org.teiid.ODBC TRACE NIO4 invoking server method: execute [, 0] 2019-02-13 14:07:47.618 org.teiid.ODBC TRACE NIO4 invoking client method: org.teiid.transport.ODBCClientInstance$1@d875495 sendResults [null, org.teiid.jdbc.ResultSetImpl@1e1aed1a, [org.teiid.odbc.PGUtil$PgColInfo@1086babd], org.teiid.client.util.ResultsFuture@3b6cff36, FORWARD, -1, false, null] 2019-02-13 14:07:47.619 org.teiid.ODBC TRACE NIO4 invoking server method: sync null 2019-02-13 14:07:47.619 org.teiid.ODBC TRACE Worker0_QueryProcessorQueue368 invoking client method: org.teiid.transport.ODBCClientInstance$1@d875495 sendCommandComplete [select oid from pg_class where relname='pg_class', [1]] 2019-02-13 14:07:47.619 org.teiid.ODBC TRACE NIO4 invoking client method: org.teiid.transport.ODBCClientInstance$1@d875495 ready [false, false] That is after execute we are immediately responding with results. That response ahead of the sync causes issues in the pg jdbc driver such as reporting that there is no result set. See TEIID-5425 This does not appear to be a requirement of the flow: https://www.postgresql.org/docs/9.3/protocol-flow.html#AEN99807