select not b from t1 -- electric fence
От | Taral |
---|---|
Тема | select not b from t1 -- electric fence |
Дата | |
Msg-id | 000101bde38c$64666280$3b291f0a@taral обсуждение исходный текст |
Ответы |
Re: [HACKERS] select not b from t1 -- electric fence
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Список | pgsql-hackers |
(gdb) set args template1 (gdb) run Starting program: /home/taral/cvs/install/bin/postgres template1 Electric Fence 2.0.5 Copyright (C) 1987-1995 Bruce Perens. POSTGRES backend interactive interface $Revision: 1.89 $ $Date: 1998/09/01 04:32:13 $ > select not b from t1 blank 1: ?column? (typeid = 16, len = 1, typmod = -1, byval = t) ---- Program received signal SIGSEGV, Segmentation fault. ExecEvalOper (opClause=0x4091dfec, econtext=0x40933fd4, isNull=0xbfffdaff "") at execQual.c:878 878 if (fcache == NULL) (gdb) list 873 /* 874 * get the fcache from the Oper node. If it is NULL, then initialize 875 * it 876 */ 877 fcache = op->op_fcache; 878 if (fcache == NULL) 879 { 880 setFcache((Node *) op, op->opid, argList, econtext); 881 fcache = op->op_fcache; 882 } (gdb) print op $1 = (Oper *) 0x0 Umm... looking at this... why is the node type FUNC_EXPR? Shouldn't it be NOT_EXPR? Anyway, PARSEDEBUG,OPTIMIZER_DEBUG,DEBUG_RECIPE doesn't give me anything. Someone have some idea how these nodes are constructed? I have no way to follow the parsing & evaluating path in the program. JP Sugarbroad
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