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2428576 - A query with many derived tables may cause SAP IQ server to crash

Symptom

 A query with many derived tables can result in SAP IQ server crash, the function calls in the stacktrace look like:

GetNewTree                                                               
MakeExternalCursor                                                               
MakeVolcanoOptimizerCursor                                                               
MakeCursor                                                               
dbi_openselect                                                               
a_plan_cache::Open                                                               
do_open                                                               
handle_open                                                               
do_cursor_execute                                                               
db__execute_any_imm                                                               
RequestProcedure::call                                                               
Context::call                                                               
Worker::call_on_stack                                                               
TopProcedure::call                                                               
Worker::spawn            


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Environment

SAP IQ 16.0

Product

SAP IQ 16.0

Keywords

 Sybase, CR802950, CR 802674, cr 799251,  stacktrace, stktrc , KBA , BC-SYB-IQ , Sybase IQ , Bug Filed

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