_PG_init ALWAYS ANYTEMPSUBTYPE BBOX_TEST BBOX_TEST_NO bboxunion CONTINUOUS CROSSINGS CROSSINGS_NO DATUM_FREE DATUM_FREE_IF_COPY datum_func2 datum_func3 DatumGetDouble2P DatumGetDouble3P DatumGetDouble4P DatumGetTemporal DatumGetTInstant DatumGetTInstantSet DatumGetTSequence DatumGetTSequenceSet DEFAULT_FLOATRANGE_ORIGIN DEFAULT_INTRANGE_ORIGIN DEFAULT_TIME_ORIGIN DISCONTINUOUS DIST_EPSILON Double2PGetDatum Double3PGetDatum Double4PGetDatum ensure_common_dimension ensure_increasing_timestamps ensure_linear_interpolation ensure_non_empty_array ensure_positive_datum ensure_same_base_type ensure_same_interpolation ensure_seq_subtypes ensure_valid_duration ensure_valid_tempsubtype ensure_valid_tempsubtype_all ensure_valid_tinstantarr ensure_valid_tsequencearr EVER FLOAT8_EQ FLOAT8_GE FLOAT8_GT FLOAT8_LE FLOAT8_LT FLOAT8_MAX FLOAT8_MIN GET_MAX GET_MIN INSTANT INSTANTSET intersection_temporal_temporal INVERT INVERT_NO JAN_3_2000 LIMIT_RATIO LINEAR MERGE MERGE_NO MOBDB_EPSILON MOBDB_FLAGS_GET_BYVAL MOBDB_FLAGS_GET_CONTINUOUS MOBDB_FLAGS_GET_GEODETIC MOBDB_FLAGS_GET_LINEAR MOBDB_FLAGS_GET_T MOBDB_FLAGS_GET_X MOBDB_FLAGS_GET_Z MOBDB_FLAGS_SET_BYVAL MOBDB_FLAGS_SET_CONTINUOUS MOBDB_FLAGS_SET_GEODETIC MOBDB_FLAGS_SET_LINEAR MOBDB_FLAGS_SET_T MOBDB_FLAGS_SET_X MOBDB_FLAGS_SET_Z mobilitydb_full_version mobilitydb_version NO_Z NORMALIZE NORMALIZE_NO PG_GETARG_ANYDATUM PG_GETARG_TEMPORAL pg_getarg_temporal POSTGIS_FREE_IF_COPY_P qsort_comparator RANGE_ROUNDOFF REST_AT REST_MINUS RTAfterStrategyNumber RTBackStrategyNumber RTBeforeStrategyNumber RTFrontStrategyNumber RTOverAfterStrategyNumber RTOverBackStrategyNumber RTOverBeforeStrategyNumber RTOverFrontStrategyNumber SEQUENCE SEQUENCESET STEP temporal_always_eq temporal_always_ge temporal_always_gt temporal_always_le temporal_always_lt temporal_always_ne temporal_append_tinstant temporal_at_max temporal_at_min temporal_at_period temporal_at_period_internal temporal_at_periodset temporal_at_timestamp temporal_at_timestampset temporal_at_value temporal_at_values temporal_bbox temporal_bbox_ev_al_eq temporal_bbox_ev_al_lt_le temporal_bbox_ptr temporal_bbox_restrict_value temporal_bbox_restrict_values temporal_cmp temporal_copy temporal_end_instant temporal_end_instant_internal temporal_end_timestamp temporal_end_value temporal_eq temporal_ever_eq temporal_ever_eq_internal temporal_ever_ge temporal_ever_gt temporal_ever_le temporal_ever_lt temporal_ever_ne temporal_from_base temporal_ge temporal_get_time temporal_get_time_internal temporal_get_values temporal_gt temporal_hash temporal_hash_internal temporal_in temporal_instant_n temporal_instants temporal_instants_internal temporal_interpolation temporal_intersects_period temporal_intersects_periodset temporal_intersects_timestamp temporal_intersects_timestampset temporal_le temporal_lt temporal_max_value temporal_mem_size temporal_merge temporal_merge_array temporal_merge_internal temporal_min_instant temporal_min_value temporal_min_value_internal temporal_minus_max temporal_minus_min temporal_minus_period temporal_minus_period_internal temporal_minus_periodset temporal_minus_timestamp temporal_minus_timestampset temporal_minus_value temporal_num_instants temporal_num_timestamps temporal_out temporal_period temporal_read temporal_recv temporal_restrict_periodset_internal temporal_restrict_timestamp_internal temporal_send temporal_shift temporal_start_instant temporal_start_timestamp temporal_start_timestamp_internal temporal_start_value temporal_subtype temporal_timestamp_n temporal_timestamps temporal_timestamps_internal temporal_to_period temporal_to_string temporal_value_at_timestamp temporal_value_at_timestamp_inc temporal_write tempsubtype_from_string TEMPSUBTYPE_MAX_LEN tempsubtype_name TEMPSUBTYPE_STRUCT_ARRAY_LEN tfloat_ranges tinstant_constructor tinstant_get_value tinstantset_constructor tinstarr_inst_n tint_to_tfloat tint_to_tfloat_internal TIntersection tlinearseq_constructor tnumber_at_range tnumber_at_ranges tnumber_bbox_restrict_ranges tnumber_minus_range tnumber_minus_ranges tnumber_restrict_range_internal tnumber_to_tbox tnumber_value_range tnumber_value_range_internal tsequenceset_constructor tstepseq_constructor TYPMOD_GET_SUBTYPE UPPER_EXC UPPER_INC varfunc WITH_Z

temporal_start_instant() Datum temporal_start_instant ( PG_FUNCTION_ARGS  ) Returns the start instant of the temporal value.