The following table indicates the alignment requirements for each of the Period data types and their respective sizes on aligned row format platforms. When the size of the stored value for a type differs for packed64 and aligned row format platforms, the differing table cells are shaded.
| Data Type | Packed 64 Size (bytes) | 64-Bit Aligned Row Size (bytes) | Allocated Aligned Row Size (bytes) |
|---|---|---|---|
| PERIOD (DATE) | 8 | 2 | 8 |
| PERIOD (TIME(n)) | 12 | 2 | 16 |
| PERIOD (TIME(n) WITH TIME ZONE) | 16 | 2 | 16 |
| PERIOD (TIMESTAMP(n)) | 20 | 2 | 24 |
| PERIOD (TIMESTAMP(n) WITH TIME ZONE) | 24 | 2 | 24 |
| PERIOD (DATE): 8 Bytes (All Platforms) | |
|---|---|
| Beginning Date | Ending Date |
| AD January 1, 1 — AD December 30, 9999 | AD January 2, 1 — AD December 31, 9999 |
| PERIOD (TIME
(Precision)): 12 Bytes (Packed64 Platforms) 16 Bytes (Aligned Row Platforms) |
|||||
|---|---|---|---|---|---|
| Beginning
Time (6 bytes - Packed64 Platforms) 8 bytes - Aligned Row Platforms) |
Ending Time
(6 bytes - Packed64 Platforms) 8 bytes - Aligned Row Platforms) |
||||
| Hour | Minute | Seconds | Hour | Minute | Seconds |
| hh:mi:ss[.ssssss] | hh:mi:ss[.ssssss] | ||||
| PERIOD (TIME (Precision) WITH TIME ZONE): 16 Bytes (All Platforms) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Beginning Time With Time Zone (8 bytes) | Ending Time With Time Zone (8 bytes) | ||||||||
| Hour | Minute | Second | Timezone _Hour |
Timezone _Minute |
Hour | Minute | Second | Timezone _Hour |
Timezone _Minute |
| hh:mi:ss.ssssss±hh:mi | hh:mi:ss.ssssss±hh:mi | ||||||||
| PERIOD (TIMESTAMP (Precision) ): 20 Bytes (All Platforms) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Beginning Time Stamp (10 bytes) | Ending Time Stamp (10 bytes) | ||||||||||
| Year | Month | Day | Hour | Minute | Second | Year | Month | Day | Hour | Minute | Second |
| yyy-mm-dd hh:mi:ss | yyy-mm-dd hh:mi:ss | ||||||||||
| PERIOD (TIMESTAMP (Precision) ) When Ending Element Value is UNTIL_CHANGED: 11 Bytes (All Platforms) | ||||||
|---|---|---|---|---|---|---|
| Beginning Time Stamp (10 bytes) | Ending Time Stamp (1 byte) |
|||||
| Year | Month | Day | Hour | Minute | Second | UNTIL_CHANGED |
| yyy-mm-dd hh:mi:ss | uc | |||||
| PERIOD (TIMESTAMP (Precision) WITH TIME ZONE): 24 Bytes (All Platforms) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beginning Time Stamp (10 bytes) | Ending Time Stamp (10 bytes) | ||||||||||||||
| Year | Month | Day | Hour | Minute | Sec. | Time-zone _Hour |
Time-zone _Minute |
Year | Month | Day | Hour | Minute | Sec. | Time-zone _Hour |
Time-zone _Minute |
| yyyy-mm-dd hh:mi:ss±hh:mi | yyyy-mm-dd hh:mi:ss±hh:mi | ||||||||||||||
| PERIOD (TIMESTAMP (Precision) ) When Ending Element Value is UNTIL_CHANGED: 13 Bytes (All Platforms) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Beginning Time Stamp With Time Zone (12 bytes) | Ending Time Stamp With Time Zone (1 byte) |
|||||||
| Year | Month | Day | Hour | Minute | Second | Timezone_ Hour |
Timezone_ Minute |
UNTIL_ CHANGED |
| yyy-mm-dd hh:mi:ss±hh:mi | uc | |||||||