/usr/include/postgresql/pgtypes_interval.h is in libecpg-dev 9.5.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | /* src/interfaces/ecpg/include/pgtypes_interval.h */
#ifndef PGTYPES_INTERVAL
#define PGTYPES_INTERVAL
#include <ecpg_config.h>
#ifndef C_H
#ifdef HAVE_LONG_INT_64
#ifndef HAVE_INT64
typedef long int int64;
#endif
#elif defined(HAVE_LONG_LONG_INT_64)
#ifndef HAVE_INT64
typedef long long int int64;
#endif
#else
/* neither HAVE_LONG_INT_64 nor HAVE_LONG_LONG_INT_64 */
#error must have a working 64-bit integer datatype
#endif
#ifdef USE_INTEGER_DATETIMES
#define HAVE_INT64_TIMESTAMP
#endif
#endif /* C_H */
typedef struct
{
#ifdef HAVE_INT64_TIMESTAMP
int64 time; /* all time units other than months and years */
#else
double time; /* all time units other than months and years */
#endif
long month; /* months and years, after time for alignment */
} interval;
#ifdef __cplusplus
extern "C"
{
#endif
extern interval *PGTYPESinterval_new(void);
extern void PGTYPESinterval_free(interval *);
extern interval *PGTYPESinterval_from_asc(char *, char **);
extern char *PGTYPESinterval_to_asc(interval *);
extern int PGTYPESinterval_copy(interval *, interval *);
#ifdef __cplusplus
}
#endif
#endif /* PGTYPES_INTERVAL */
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