Add explicit tests for division by zero to all user-accessible integer
division and modulo functions, to avoid problems on OS X (which fails to trap 0 divide at all) and Windows (which traps it in some bizarre nonstandard fashion). Standardize on 'division by zero' as the one true spelling of this error message. Add regression tests as suggested by Neil Conway.
This commit is contained in:
Tom Lane
parent
6261c75014
commit
31e69ccb21
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@ -9,7 +9,7 @@
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* workings can be found in the book "Software Solutions in C" by
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* Dale Schumacher, Academic Press, ISBN: 0-12-632360-7.
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*
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/cash.c,v 1.56 2002/09/04 20:31:27 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/cash.c,v 1.57 2003/03/11 21:01:33 tgl Exp $
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*/
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#include "postgres.h"
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@ -442,7 +442,7 @@ cash_div_flt8(PG_FUNCTION_ARGS)
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Cash result;
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if (f == 0.0)
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elog(ERROR, "cash_div: divide by 0.0 error");
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elog(ERROR, "division by zero");
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result = rint(c / f);
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PG_RETURN_CASH(result);
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@ -492,7 +492,7 @@ cash_div_flt4(PG_FUNCTION_ARGS)
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Cash result;
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if (f == 0.0)
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elog(ERROR, "cash_div: divide by 0.0 error");
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elog(ERROR, "division by zero");
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result = rint(c / f);
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PG_RETURN_CASH(result);
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@ -543,7 +543,7 @@ cash_div_int4(PG_FUNCTION_ARGS)
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Cash result;
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if (i == 0)
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elog(ERROR, "cash_div_int4: divide by 0 error");
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elog(ERROR, "division by zero");
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result = rint(c / i);
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@ -593,7 +593,7 @@ cash_div_int2(PG_FUNCTION_ARGS)
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Cash result;
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if (s == 0)
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elog(ERROR, "cash_div: divide by 0 error");
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elog(ERROR, "division by zero");
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result = rint(c / s);
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PG_RETURN_CASH(result);
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@ -9,7 +9,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/char.c,v 1.33 2002/06/20 20:29:36 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/char.c,v 1.34 2003/03/11 21:01:33 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -150,6 +150,9 @@ chardiv(PG_FUNCTION_ARGS)
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char arg1 = PG_GETARG_CHAR(0);
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char arg2 = PG_GETARG_CHAR(1);
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if (arg2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_CHAR((int8) arg1 / (int8) arg2);
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}
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/float.c,v 1.83 2002/11/08 17:37:52 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/float.c,v 1.84 2003/03/11 21:01:33 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -505,7 +505,7 @@ float4div(PG_FUNCTION_ARGS)
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double result;
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if (arg2 == 0.0)
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elog(ERROR, "float4div: divide by zero error");
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elog(ERROR, "division by zero");
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/* Do division in float8, then check for overflow */
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result = (float8) arg1 / (float8) arg2;
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@ -567,7 +567,7 @@ float8div(PG_FUNCTION_ARGS)
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float8 result;
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if (arg2 == 0.0)
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elog(ERROR, "float8div: divide by zero error");
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elog(ERROR, "division by zero");
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result = arg1 / arg2;
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@ -1753,7 +1753,7 @@ float48div(PG_FUNCTION_ARGS)
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float8 result;
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if (arg2 == 0.0)
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elog(ERROR, "float48div: divide by zero");
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elog(ERROR, "division by zero");
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result = arg1 / arg2;
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CheckFloat8Val(result);
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@ -1813,7 +1813,7 @@ float84div(PG_FUNCTION_ARGS)
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float8 result;
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if (arg2 == 0.0)
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elog(ERROR, "float84div: divide by zero");
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elog(ERROR, "division by zero");
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result = arg1 / arg2;
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/geo_ops.c,v 1.74 2003/01/21 19:44:26 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/geo_ops.c,v 1.75 2003/03/11 21:01:33 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -3504,7 +3504,7 @@ point_div(PG_FUNCTION_ARGS)
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div = (p2->x * p2->x) + (p2->y * p2->y);
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if (div == 0.0)
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elog(ERROR, "point_div: divide by 0.0 error");
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elog(ERROR, "division by zero");
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result->x = ((p1->x * p2->x) + (p1->y * p2->y)) / div;
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result->y = ((p2->x * p1->y) - (p2->y * p1->x)) / div;
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/int.c,v 1.52 2002/08/22 00:01:43 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/int.c,v 1.53 2003/03/11 21:01:33 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -551,6 +551,9 @@ int4div(PG_FUNCTION_ARGS)
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int32 arg1 = PG_GETARG_INT32(0);
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int32 arg2 = PG_GETARG_INT32(1);
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if (arg2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT32(arg1 / arg2);
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}
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@ -611,6 +614,9 @@ int2div(PG_FUNCTION_ARGS)
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int16 arg1 = PG_GETARG_INT16(0);
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int16 arg2 = PG_GETARG_INT16(1);
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if (arg2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT16(arg1 / arg2);
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}
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@ -647,6 +653,9 @@ int24div(PG_FUNCTION_ARGS)
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int16 arg1 = PG_GETARG_INT16(0);
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int32 arg2 = PG_GETARG_INT32(1);
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if (arg2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT32(arg1 / arg2);
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}
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@ -683,6 +692,9 @@ int42div(PG_FUNCTION_ARGS)
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int32 arg1 = PG_GETARG_INT32(0);
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int16 arg2 = PG_GETARG_INT16(1);
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if (arg2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT32(arg1 / arg2);
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}
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@ -692,6 +704,9 @@ int4mod(PG_FUNCTION_ARGS)
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int32 arg1 = PG_GETARG_INT32(0);
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int32 arg2 = PG_GETARG_INT32(1);
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if (arg2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT32(arg1 % arg2);
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}
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@ -701,6 +716,9 @@ int2mod(PG_FUNCTION_ARGS)
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int16 arg1 = PG_GETARG_INT16(0);
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int16 arg2 = PG_GETARG_INT16(1);
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if (arg2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT16(arg1 % arg2);
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}
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@ -710,6 +728,9 @@ int24mod(PG_FUNCTION_ARGS)
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int16 arg1 = PG_GETARG_INT16(0);
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int32 arg2 = PG_GETARG_INT32(1);
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if (arg2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT32(arg1 % arg2);
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}
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@ -719,6 +740,9 @@ int42mod(PG_FUNCTION_ARGS)
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int32 arg1 = PG_GETARG_INT32(0);
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int16 arg2 = PG_GETARG_INT16(1);
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if (arg2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT32(arg1 % arg2);
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}
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@ -7,7 +7,7 @@
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/int8.c,v 1.42 2002/09/18 21:35:22 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/int8.c,v 1.43 2003/03/11 21:01:33 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -504,6 +504,9 @@ int8div(PG_FUNCTION_ARGS)
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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if (val2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT64(val1 / val2);
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}
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@ -528,6 +531,9 @@ int8mod(PG_FUNCTION_ARGS)
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int64 val2 = PG_GETARG_INT64(1);
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int64 result;
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if (val2 == 0)
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elog(ERROR, "division by zero");
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result = val1 / val2;
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result *= val2;
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result = val1 - result;
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@ -621,6 +627,9 @@ int84div(PG_FUNCTION_ARGS)
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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if (val2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT64(val1 / val2);
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}
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@ -657,6 +666,9 @@ int48div(PG_FUNCTION_ARGS)
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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if (val2 == 0)
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elog(ERROR, "division by zero");
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PG_RETURN_INT64(val1 / val2);
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}
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@ -5,7 +5,7 @@
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*
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* 1998 Jan Wieck
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*
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/numeric.c,v 1.56 2002/10/19 02:08:17 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/numeric.c,v 1.57 2003/03/11 21:01:33 tgl Exp $
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*
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* ----------
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*/
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@ -3266,7 +3266,7 @@ div_var(NumericVar *var1, NumericVar *var2, NumericVar *result)
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*/
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ndigits_tmp = var2->ndigits + 1;
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if (ndigits_tmp == 1)
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elog(ERROR, "division by zero on numeric");
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elog(ERROR, "division by zero");
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/*
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* Determine the result sign, weight and number of digits to calculate
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/timestamp.c,v 1.79 2003/02/27 21:36:58 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/timestamp.c,v 1.80 2003/03/11 21:01:33 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -1869,7 +1869,7 @@ interval_div(PG_FUNCTION_ARGS)
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result = (Interval *) palloc(sizeof(Interval));
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if (factor == 0.0)
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elog(ERROR, "interval_div: divide by 0.0 error");
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elog(ERROR, "division by zero");
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#ifdef HAVE_INT64_TIMESTAMP
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result->month = (span->month / factor);
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@ -18,7 +18,7 @@ select 1;
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-- notify pg_class
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--
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--
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-- RETRIEVE
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-- SELECT
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-- missing relation name
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select;
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@ -54,7 +54,7 @@ ERROR: parser: parse error at or near ";" at character 12
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delete from nonesuch;
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ERROR: Relation "nonesuch" does not exist
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--
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-- DESTROY
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-- DROP
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-- missing relation name (this had better not wildcard!)
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drop table;
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@ -63,7 +63,7 @@ ERROR: parser: parse error at or near ";" at character 11
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drop table nonesuch;
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ERROR: table "nonesuch" does not exist
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--
|
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-- RENAME
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-- ALTER TABLE
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-- relation renaming
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-- missing relation name
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@ -104,7 +104,7 @@ WARNING: ROLLBACK: no transaction in progress
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end;
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WARNING: COMMIT: no transaction in progress
|
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--
|
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-- DEFINE AGGREGATE
|
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-- CREATE AGGREGATE
|
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-- sfunc/finalfunc type disagreement
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create aggregate newavg2 (sfunc = int4pl,
|
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basetype = int4,
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@ -118,7 +118,7 @@ create aggregate newcnt1 (sfunc = int4inc,
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initcond = '0');
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ERROR: Define: "basetype" unspecified
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--
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-- REMOVE INDEX
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-- DROP INDEX
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|
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-- missing index name
|
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drop index;
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@ -130,7 +130,7 @@ ERROR: parser: parse error at or near "314159" at character 12
|
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drop index nonesuch;
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ERROR: index "nonesuch" does not exist
|
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--
|
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-- REMOVE AGGREGATE
|
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-- DROP AGGREGATE
|
||||
|
||||
-- missing aggregate name
|
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drop aggregate;
|
||||
|
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@ -151,7 +151,7 @@ ERROR: RemoveAggregate: aggregate nonesuch(integer) does not exist
|
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drop aggregate newcnt (float4);
|
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ERROR: RemoveAggregate: aggregate newcnt(real) does not exist
|
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--
|
||||
-- REMOVE FUNCTION
|
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-- DROP FUNCTION
|
||||
|
||||
-- missing function name
|
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drop function ();
|
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|
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@ -163,7 +163,7 @@ ERROR: parser: parse error at or near "314159" at character 15
|
|||
drop function nonesuch();
|
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ERROR: RemoveFunction: function nonesuch() does not exist
|
||||
--
|
||||
-- REMOVE TYPE
|
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-- DROP TYPE
|
||||
|
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-- missing type name
|
||||
drop type;
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|
|
@ -237,3 +237,28 @@ ERROR: parser: parse error at or near "instance" at character 6
|
|||
-- no such rule
|
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drop rewrite rule nonesuch;
|
||||
ERROR: parser: parse error at or near "rewrite" at character 6
|
||||
--
|
||||
-- Check that division-by-zero is properly caught.
|
||||
--
|
||||
select 1/0;
|
||||
ERROR: division by zero
|
||||
select 1::int8/0;
|
||||
ERROR: division by zero
|
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select 1/0::int8;
|
||||
ERROR: division by zero
|
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select 1::int2/0;
|
||||
ERROR: division by zero
|
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select 1/0::int2;
|
||||
ERROR: division by zero
|
||||
select 1::numeric/0;
|
||||
ERROR: division by zero
|
||||
select 1/0::numeric;
|
||||
ERROR: division by zero
|
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select 1::float8/0;
|
||||
ERROR: division by zero
|
||||
select 1/0::float8;
|
||||
ERROR: division by zero
|
||||
select 1::float4/0;
|
||||
ERROR: division by zero
|
||||
select 1/0::float4;
|
||||
ERROR: division by zero
|
||||
|
|
|
|||
|
|
@ -113,7 +113,7 @@ SELECT '' AS three, f.f1, f.f1 - '-10' AS x FROM FLOAT4_TBL f
|
|||
|
||||
-- test divide by zero
|
||||
SELECT '' AS bad, f.f1 / '0.0' from FLOAT4_TBL f;
|
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ERROR: float4div: divide by zero error
|
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ERROR: division by zero
|
||||
SELECT '' AS five, FLOAT4_TBL.*;
|
||||
five | f1
|
||||
------+--------------
|
||||
|
|
|
|||
|
|
@ -113,7 +113,7 @@ SELECT '' AS three, f.f1, f.f1 - '-10' AS x FROM FLOAT4_TBL f
|
|||
|
||||
-- test divide by zero
|
||||
SELECT '' AS bad, f.f1 / '0.0' from FLOAT4_TBL f;
|
||||
ERROR: float4div: divide by zero error
|
||||
ERROR: division by zero
|
||||
SELECT '' AS five, FLOAT4_TBL.*;
|
||||
five | f1
|
||||
------+-------------
|
||||
|
|
|
|||
|
|
@ -257,7 +257,7 @@ ERROR: can't take log of a negative number
|
|||
SELECT '' AS bad, exp(f.f1) from FLOAT8_TBL f;
|
||||
ERROR: exp() result is out of range
|
||||
SELECT '' AS bad, f.f1 / '0.0' from FLOAT8_TBL f;
|
||||
ERROR: float8div: divide by zero error
|
||||
ERROR: division by zero
|
||||
SELECT '' AS five, FLOAT8_TBL.*;
|
||||
five | f1
|
||||
------+-----------------------
|
||||
|
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|
|
@ -257,7 +257,7 @@ ERROR: can't take log of a negative number
|
|||
SELECT '' AS bad, exp(f.f1) from FLOAT8_TBL f;
|
||||
ERROR: exp() result is out of range
|
||||
SELECT '' AS bad, f.f1 / '0.0' from FLOAT8_TBL f;
|
||||
ERROR: float8div: divide by zero error
|
||||
ERROR: division by zero
|
||||
SELECT '' AS five, FLOAT8_TBL.*;
|
||||
five | f1
|
||||
------+-----------------------
|
||||
|
|
|
|||
|
|
@ -257,7 +257,7 @@ ERROR: can't take log of a negative number
|
|||
SELECT '' AS bad, exp(f.f1) from FLOAT8_TBL f;
|
||||
ERROR: exp() result is out of range
|
||||
SELECT '' AS bad, f.f1 / '0.0' from FLOAT8_TBL f;
|
||||
ERROR: float8div: divide by zero error
|
||||
ERROR: division by zero
|
||||
SELECT '' AS five, FLOAT8_TBL.*;
|
||||
five | f1
|
||||
------+-----------------------
|
||||
|
|
|
|||
|
|
@ -257,7 +257,7 @@ ERROR: can't take log of a negative number
|
|||
SELECT '' AS bad, exp(f.f1) from FLOAT8_TBL f;
|
||||
ERROR: exp() result is out of range
|
||||
SELECT '' AS bad, f.f1 / '0.0' from FLOAT8_TBL f;
|
||||
ERROR: float8div: divide by zero error
|
||||
ERROR: division by zero
|
||||
SELECT '' AS five, FLOAT8_TBL.*;
|
||||
five | f1
|
||||
------+-----------------------
|
||||
|
|
|
|||
|
|
@ -17,7 +17,7 @@ select 1;
|
|||
--
|
||||
|
||||
--
|
||||
-- RETRIEVE
|
||||
-- SELECT
|
||||
|
||||
-- missing relation name
|
||||
select;
|
||||
|
|
@ -55,7 +55,7 @@ delete from nonesuch;
|
|||
|
||||
|
||||
--
|
||||
-- DESTROY
|
||||
-- DROP
|
||||
|
||||
-- missing relation name (this had better not wildcard!)
|
||||
drop table;
|
||||
|
|
@ -65,9 +65,8 @@ drop table nonesuch;
|
|||
|
||||
|
||||
--
|
||||
-- RENAME
|
||||
-- ALTER TABLE
|
||||
|
||||
|
||||
-- relation renaming
|
||||
|
||||
-- missing relation name
|
||||
|
|
@ -112,7 +111,7 @@ end;
|
|||
|
||||
|
||||
--
|
||||
-- DEFINE AGGREGATE
|
||||
-- CREATE AGGREGATE
|
||||
|
||||
-- sfunc/finalfunc type disagreement
|
||||
create aggregate newavg2 (sfunc = int4pl,
|
||||
|
|
@ -128,7 +127,7 @@ create aggregate newcnt1 (sfunc = int4inc,
|
|||
|
||||
|
||||
--
|
||||
-- REMOVE INDEX
|
||||
-- DROP INDEX
|
||||
|
||||
-- missing index name
|
||||
drop index;
|
||||
|
|
@ -141,7 +140,7 @@ drop index nonesuch;
|
|||
|
||||
|
||||
--
|
||||
-- REMOVE AGGREGATE
|
||||
-- DROP AGGREGATE
|
||||
|
||||
-- missing aggregate name
|
||||
drop aggregate;
|
||||
|
|
@ -163,7 +162,7 @@ drop aggregate newcnt (float4);
|
|||
|
||||
|
||||
--
|
||||
-- REMOVE FUNCTION
|
||||
-- DROP FUNCTION
|
||||
|
||||
-- missing function name
|
||||
drop function ();
|
||||
|
|
@ -176,7 +175,7 @@ drop function nonesuch();
|
|||
|
||||
|
||||
--
|
||||
-- REMOVE TYPE
|
||||
-- DROP TYPE
|
||||
|
||||
-- missing type name
|
||||
drop type;
|
||||
|
|
@ -252,3 +251,28 @@ drop instance rule nonesuch on noplace;
|
|||
-- no such rule
|
||||
drop rewrite rule nonesuch;
|
||||
|
||||
--
|
||||
-- Check that division-by-zero is properly caught.
|
||||
--
|
||||
|
||||
select 1/0;
|
||||
|
||||
select 1::int8/0;
|
||||
|
||||
select 1/0::int8;
|
||||
|
||||
select 1::int2/0;
|
||||
|
||||
select 1/0::int2;
|
||||
|
||||
select 1::numeric/0;
|
||||
|
||||
select 1/0::numeric;
|
||||
|
||||
select 1::float8/0;
|
||||
|
||||
select 1/0::float8;
|
||||
|
||||
select 1::float4/0;
|
||||
|
||||
select 1/0::float4;
|
||||
|
|
|
|||
Loading…
Reference in New Issue