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Silence some Coverity warnings and improve code consistency.

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Coverity complained about possible overflow in expressions like
	intresult = tm->tm_sec * 1000000 + fsec;
on the grounds that the multiplication would happen in 32-bit
arithmetic before widening to the int64 result.  I think these
are all false positives because of the limited possible range of
tm_sec; but nonetheless it seems silly to spell it like that when
nearby lines have the identical computation written with a 64-bit
constant.

... or more accurately, with an LL constant, which is not project
style.  Make all of these use INT64CONST(), as we do elsewhere.

This is all new code from a2da77cdb, so no need for back-patch.
This commit is contained in:
Tom Lane
2021-04-11 17:02:04 -04:00
parent d7cff12c4c
commit 6277435a8a
2 changed files with 20 additions and 20 deletions
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26
src/backend/utils/adt/timestamp.c
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@ -4676,7 +4676,7 @@ timestamp_part_common(PG_FUNCTION_ARGS, bool retnumeric)
switch (val)
{
case DTK_MICROSEC:
intresult = tm->tm_sec * 1000000.0 + fsec;
intresult = tm->tm_sec * INT64CONST(1000000) + fsec;
break;
case DTK_MILLISEC:
@ -4685,7 +4685,7 @@ timestamp_part_common(PG_FUNCTION_ARGS, bool retnumeric)
* tm->tm_sec * 1000 + fsec / 1000
* = (tm->tm_sec * 1'000'000 + fsec) / 1000
*/
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * 1000000LL + fsec, 3));
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + fsec, 3));
else
PG_RETURN_FLOAT8(tm->tm_sec * 1000.0 + fsec / 1000.0);
break;
@ -4696,7 +4696,7 @@ timestamp_part_common(PG_FUNCTION_ARGS, bool retnumeric)
* tm->tm_sec + fsec / 1'000'000
* = (tm->tm_sec * 1'000'000 + fsec) / 1'000'000
*/
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * 1000000LL + fsec, 6));
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + fsec, 6));
else
PG_RETURN_FLOAT8(tm->tm_sec + fsec / 1000000.0);
break;
@ -4772,8 +4772,8 @@ timestamp_part_common(PG_FUNCTION_ARGS, bool retnumeric)
case DTK_JULIAN:
if (retnumeric)
PG_RETURN_NUMERIC(numeric_add_opt_error(int64_to_numeric(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday)),
numeric_div_opt_error(int64_to_numeric(((((tm->tm_hour * MINS_PER_HOUR) + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec) * 1000000LL + fsec),
int64_to_numeric(SECS_PER_DAY * 1000000LL),
numeric_div_opt_error(int64_to_numeric(((((tm->tm_hour * MINS_PER_HOUR) + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec) * INT64CONST(1000000) + fsec),
int64_to_numeric(SECS_PER_DAY * INT64CONST(1000000)),
NULL),
NULL));
else
@ -4962,7 +4962,7 @@ timestamptz_part_common(PG_FUNCTION_ARGS, bool retnumeric)
break;
case DTK_MICROSEC:
intresult = tm->tm_sec * 1000000 + fsec;
intresult = tm->tm_sec * INT64CONST(1000000) + fsec;
break;
case DTK_MILLISEC:
@ -4971,7 +4971,7 @@ timestamptz_part_common(PG_FUNCTION_ARGS, bool retnumeric)
* tm->tm_sec * 1000 + fsec / 1000
* = (tm->tm_sec * 1'000'000 + fsec) / 1000
*/
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * 1000000LL + fsec, 3));
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + fsec, 3));
else
PG_RETURN_FLOAT8(tm->tm_sec * 1000.0 + fsec / 1000.0);
break;
@ -4982,7 +4982,7 @@ timestamptz_part_common(PG_FUNCTION_ARGS, bool retnumeric)
* tm->tm_sec + fsec / 1'000'000
* = (tm->tm_sec * 1'000'000 + fsec) / 1'000'000
*/
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * 1000000LL + fsec, 6));
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + fsec, 6));
else
PG_RETURN_FLOAT8(tm->tm_sec + fsec / 1000000.0);
break;
@ -5046,8 +5046,8 @@ timestamptz_part_common(PG_FUNCTION_ARGS, bool retnumeric)
case DTK_JULIAN:
if (retnumeric)
PG_RETURN_NUMERIC(numeric_add_opt_error(int64_to_numeric(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday)),
numeric_div_opt_error(int64_to_numeric(((((tm->tm_hour * MINS_PER_HOUR) + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec) * 1000000LL + fsec),
int64_to_numeric(SECS_PER_DAY * 1000000LL),
numeric_div_opt_error(int64_to_numeric(((((tm->tm_hour * MINS_PER_HOUR) + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec) * INT64CONST(1000000) + fsec),
int64_to_numeric(SECS_PER_DAY * INT64CONST(1000000)),
NULL),
NULL));
else
@ -5191,7 +5191,7 @@ interval_part_common(PG_FUNCTION_ARGS, bool retnumeric)
switch (val)
{
case DTK_MICROSEC:
intresult = tm->tm_sec * 1000000 + fsec;
intresult = tm->tm_sec * INT64CONST(1000000) + fsec;
break;
case DTK_MILLISEC:
@ -5200,7 +5200,7 @@ interval_part_common(PG_FUNCTION_ARGS, bool retnumeric)
* tm->tm_sec * 1000 + fsec / 1000
* = (tm->tm_sec * 1'000'000 + fsec) / 1000
*/
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * 1000000LL + fsec, 3));
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + fsec, 3));
else
PG_RETURN_FLOAT8(tm->tm_sec * 1000.0 + fsec / 1000.0);
break;
@ -5211,7 +5211,7 @@ interval_part_common(PG_FUNCTION_ARGS, bool retnumeric)
* tm->tm_sec + fsec / 1'000'000
* = (tm->tm_sec * 1'000'000 + fsec) / 1'000'000
*/
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * 1000000LL + fsec, 6));
PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + fsec, 6));
else
PG_RETURN_FLOAT8(tm->tm_sec + fsec / 1000000.0);
break;