HI, Consider the below test:
postgres@110311=#call sum(2+2); server closed the connection unexpectedly This probably means the server terminated abnormally before or while processing the request. The connection to the server was lost. Attempting reset: Failed. Call stack: (gdb) bt #0 0x00007fef9b5851d7 in raise () from /lib64/libc.so.6 #1 0x00007fef9b5868c8 in abort () from /lib64/libc.so.6 #2 0x00000000009ec5b5 in ExceptionalCondition (conditionName=0xb7e12b "!(((bool) 0))", errorType=0xb7e04c "FailedAssertion", fileName=0xb7e040 "parse_agg.c", lineNumber=349) at assert.c:54 #3 0x00000000005dc3b6 in check_agglevels_and_constraints (pstate=0x2d1ba90, expr=0x2d1bd80) at parse_agg.c:349 #4 0x00000000005dc104 in transformAggregateCall (pstate=0x2d1ba90, agg=0x2d1bd80, args=0x2d1c3c0, aggorder=0x0, agg_distinct=0 '\000') at parse_agg.c:237 #5 0x00000000005f4df7 in ParseFuncOrColumn (pstate=0x2d1ba90, funcname=0x2d10578, fargs=0x2d1c3c0, last_srf=0x0, fn=0x2d10760, proc_call=1 '\001', location=5) at parse_func.c:726 Here it's hitting Assert() because pstate->p_expr_kind is set to EXPR_KIND_NONE for the CallStmt function resolution. Regards, Thanks, Rushabh Lathia www.EnterpriseDB.com