2692187 - IQ Server goes down referring to a nonexistent column - SAP IQ

When referring to a column that does not exist in the table from nested SQL, IQ Server is stopped by SIGNAL 11.

The following SQL statement refers to Col4 which does not exist.
But SAP IQ does not output "Column 'Col4' not found" error.

SQL
-------------------------------------

SELECT Sub1.Col4 FROM (SELECT Col4 = Sub2.Col2 FROM 
    (SELECT Col2 FROM ReproTab UNION ALL SELECT 'XYZ' AS Col2 WHERE EXISTS 
        (SELECT Col3 FROM ReproTab WHERE Col4 = 'ABC')) Sub2
    ) Sub1;

Stack trace
-------------------------------------

pcstkwalk(stk_trace*, int, db_log*, hos_fd*)
ucstkgentrace(int, int)
DumpAllThreads(char const*, unsigned int, int)
hos_ABORT(char const*, unsigned int, char const*, char*, char*, sigcontext*)
SigHndlr
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GetNewTree(a_statement*, a_tabdef_set*, unsigned int*)
MakeExternalCursor(a_db_cursor*, an_isolation_level, a_cursor_spec*, a_statement*, unsigned int, unsigned int, unsigned int)
MakeVolcanoOptimizerCursor(IDBHeap*, a_statement*, an_isolation_level, a_cursor_spec*, unsigned int, unsigned int, PlanInfo*, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int, df_InternalCursor*, dfv_HostVars**, a_set_of_row_descriptors**, a_query_diagnostics*)
MakeCursor(IDBHeap*, a_statement*, an_isolation_level, a_cursor_spec*, unsigned int, unsigned int, PlanInfo*, unsigned int, unsigned int, unsigned int, df_InternalCursor*, dfv_HostVars**, a_set_of_row_descriptors**, a_query_diagnostics*)
dbi_partialopen(IDBHeap*, a_statement*, unsigned int, a_cursor_spec*, PlanInfo*, unsigned int, unsigned int, df_InternalCursor*, a_query_diagnostics*, unsigned int)
a_plan_cache::OpenPartial(a_stmt*, a_statement*, unsigned int, a_cursor_spec*, PlanInfo*)
dbi_describe_statement(a_stmt*, unsigned short, unsigned short, a_cursor_spec*, unsigned int*)
db__describe_output(Connection*, an_sqlpres_receive*)
do_request(Worker*, an_sqlpres_receive*)
RequestProcedure::call()
Worker::spawn(Procedure*)
EngStream::handle_ind(unsigned char, unsigned int)
EngStream::execute()
RQConnItem::do_request()
RQBaseItem::do_work(Worker*)
RequestQueue::worker_body()
request_task(void*)
run_task_body
UnixTask::pre_body(void*)
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• SAP Sybase IQ 15.2
• SAP IQ 15.4
• SAP IQ 16.0
• SAP IQ 16.1 

SAP IQ, colmun, not found, UNION, sub query, , KBA , BC-SYB-IQ , Sybase IQ , Problem