Temporal sampling doesn't respect last instant #690
Description
Describe the bug
When sampling a stepwise temporal value where the last sample is right at the last instant and it changes value, this change is not reflected in the sampling.
To Reproduce
Run this example program:
#include <stdio.h>
#include <meos.h>
int main() {
/* Initialize MEOS */
meos_initialize();
Temporal *original = tbool_in("[True@2019-09-01, False@2019-09-02]");
Temporal *expected = tbool_in("[True@2019-09-01, True@2019-09-01 12:00:00, False@2019-09-02]");
Interval *interval = pg_interval_in("12 hours", -1);
TimestampTz tz = pg_timestamptz_in("2019-09-01", -1);
Temporal *sampled = temporal_tsample(original, interval, tz, STEP);
printf("Sampled Temporal: %s\n", tbool_out(sampled)); // [t@2019-09-01 00:00:00+02, t@2019-09-02 00:00:00+02]
printf("Expected Temporal: %s\n", tbool_out(expected)); // [t@2019-09-01 00:00:00+02, f@2019-09-02 00:00:00+02]
/* Finalize MEOS */
meos_finalize();
/* Return */
return EXIT_SUCCESS;
}Expected behavior
The last instant of the sampling result is false (i.e. [t@2019-09-01 00:00:00+02, f@2019-09-02 00:00:00+02]), but it is true (i.e. [t@2019-09-01 00:00:00+02, t@2019-09-02 00:00:00+02]