diff options
Diffstat (limited to 'src/include/datatype/timestamp.h')
| -rw-r--r-- | src/include/datatype/timestamp.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/include/datatype/timestamp.h b/src/include/datatype/timestamp.h index 5fa38d20d84..d155f1b03b0 100644 --- a/src/include/datatype/timestamp.h +++ b/src/include/datatype/timestamp.h @@ -40,6 +40,10 @@ typedef int64 TimestampTz; typedef int64 TimeOffset; typedef int32 fsec_t; /* fractional seconds (in microseconds) */ + +/* + * Storage format for type interval. + */ typedef struct { TimeOffset time; /* all time units other than days, months and @@ -48,6 +52,41 @@ typedef struct int32 month; /* months and years, after time for alignment */ } Interval; +/* + * Data structure representing a broken-down interval. + * + * For historical reasons, this is modeled on struct pg_tm for timestamps. + * Unlike the situation for timestamps, there's no magic interpretation + * needed for months or years: they're just zero or not. Note that fields + * can be negative; however, because of the divisions done while converting + * from struct Interval, only tm_mday could be INT_MIN. This is important + * because we may need to negate the values in some code paths. + */ +struct pg_itm +{ + int tm_usec; + int tm_sec; + int tm_min; + int64 tm_hour; /* needs to be wide */ + int tm_mday; + int tm_mon; + int tm_year; +}; + +/* + * Data structure for decoding intervals. We could just use struct pg_itm, + * but then the requirement for tm_usec to be 64 bits would propagate to + * places where it's not really needed. Also, omitting the fields that + * aren't used during decoding seems like a good error-prevention measure. + */ +struct pg_itm_in +{ + int64 tm_usec; /* needs to be wide */ + int tm_mday; + int tm_mon; + int tm_year; +}; + /* Limits on the "precision" option (typmod) for these data types */ #define MAX_TIMESTAMP_PRECISION 6 |