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Make EXTRACT(TIMEZONE) and SET/SHOW TIMEZONE follow the SQL convention

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for the sign of timezone offsets, ie, positive is east from UTC.  These
were previously out of step with other operations that accept or show
timezones, such as I/O of timestamptz values.
This commit is contained in:
Tom Lane
2003-07-17 00:55:37 +00:00
parent 93236b58e0
commit 764f72dc82
10 changed files with 74 additions and 41 deletions
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15
src/interfaces/ecpg/pgtypeslib/dt.h
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@ -183,12 +183,23 @@ typedef struct
} datetkn;
/* TMODULO()
/* FMODULO()
* Macro to replace modf(), which is broken on some platforms.
* t = input and remainder
* q = integer part
* u = divisor
*/
#define FMODULO(t,q,u) \
do { \
q = ((t < 0) ? ceil(t / u): floor(t / u)); \
if (q != 0) t -= rint(q * u); \
} while(0)
/* TMODULO()
* Like FMODULO(), but work on the timestamp datatype (either int64 or float8).
* We assume that int64 follows the C99 semantics for division (negative
* quotients truncate towards zero).
*/
#ifdef HAVE_INT64_TIMESTAMP
#define TMODULO(t,q,u) \
do { \
@ -198,7 +209,7 @@ do { \
#else
#define TMODULO(t,q,u) \
do { \
q = ((t < 0)? ceil(t / u): floor(t / u)); \
q = ((t < 0) ? ceil(t / u): floor(t / u)); \
if (q != 0) t -= rint(q * u); \
} while(0)
#endif