FPE on Alpha in Select with PKEY - Mailing list pgsql-bugs

============================================================================
                        POSTGRESQL BUG REPORT TEMPLATE
============================================================================


Your name        : Adriaan Joubert
Your email address    : a.joubert@albourne.com


System Configuration
---------------------
  Architecture (example: Intel Pentium)      : DEC Alpha

  Operating System (example: Linux 2.0.26 ELF)     : DU 4.0 D

  PostgreSQL version (example: PostgreSQL-6.4.2)  :   PostgreSQL-6.4.2

  Compiler used (example:  gcc 2.8.0)        :  DEC C V5.6-071


Please enter a FULL description of your problem:
------------------------------------------------

When doing a select with multiple OR's or an IN statement where this
involves a primary key, causes a floating point exception.

Creating two tables A and B as follows:

CREATE TABLE A (
    PRIMARY KEY (a),
    a int4 NOT NULL,
    b int4 NOT NULL
);
INSERT INTO A values (73,2);
INSERT INTO A values (74,2);

CREATE TABLE B (
    a int4 NOT NULL,
    b int4 NOT NULL
);
INSERT INTO B values (73,2);
INSERT INTO B values (74,2);


we get the following behaviour

tt=> select * from B where a in (73,74);
 a|b
--+-
73|2
74|2
(2 rows)

tt=> select * from A where a in (73,74);
ERROR:  floating point exception! The last floating point operation
either exceeded legal ranges or was a divide by zero
tt=> select * from A where a=73 or a=74;
ERROR:  floating point exception! The last floating point operation
either exceeded legal ranges or was a divide by zero




Please describe a way to repeat the problem.   Please try to provide a
concise reproducible example, if at all possible:
----------------------------------------------------------------------

See above.



If you know how this problem might be fixed, list the solution below:
---------------------------------------------------------------------

I know it crashed in create_or_index_paths: following stack-trace

0  0x1200c83b4 in create_or_index_paths(0x0, 0x140201e80, 0x1f5, 0x1,
0x4, 0x0) in ./postgres
#1  0x1200c2924 in UnknownProcedure1FromFile134(0x0, 0x140201e80, 0x1f5,
0x1, 0x4, 0x0) in ./postgres
#2  0x1200c281c in find_paths(0x0, 0x140201e80, 0x1f5, 0x1, 0x4, 0x0) in
./postgres
#3  0x1200cb074 in UnknownProcedure1FromFile147(0x0, 0x140201e80, 0x1f5,
0x1, 0x4, 0x0) in ./postgres
#4  0x1200caedc in query_planner(0x0, 0x140201e80, 0x1f5, 0x1, 0x4, 0x0)
in ./postgres
#5  0x1200cb9bc in union_planner(0x0, 0x140201e80, 0x1f5, 0x1, 0x4, 0x0)
in ./postgres
#6  0x1200cb75c in planner(0x0, 0x140201e80, 0x1f5, 0x1, 0x4, 0x0) in
./postgres
#7  0x12011e3b0 in pg_parse_and_plan(0x0, 0x140201e80, 0x1f5, 0x1, 0x4,
0x0) in ./postgres
#8  0x12011e654 in pg_exec_query_dest(0x0, 0x140201e80, 0x1f5, 0x1, 0x4,
0x0) in ./postgres
#9  0x12011fffc in PostgresMain(0x0, 0x140201e80, 0x1f5, 0x1, 0x4, 0x0)
in ./postgres
#10 0x1200b029c in main(0x0, 0x140201e80, 0x1f5, 0x1, 0x4, 0x0) in
./postgres
#11 0x12003b1a8 in __start(0x0, 0x140201e80, 0x1f5, 0x1, 0x4, 0x0) in
./postgres


I'm going to have to recompile with debugging switched on to have a
better
look at it. Anybody have any idea which source file this is in?

--
--------------------------------------+-------------------------------
 Dr Adriaan Joubert                   | Phone:  +357-2-750 652
 APL Financial Services (Overseas) Ltd| Fax:    +357-2-750 654
 3 D. Vikella St                 | e-mail: a.joubert@albourne.com
 1061 Nicosia, CYPRUS              |
--------------------------------------+-------------------------------