Lu, Huayi
ef0ada5a59
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: Lu, Huayi <luhuayi@huawei.com> Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
17 KiB
Data Types Supported by Column-Store Tables
Table 1 lists the data types supported by column-store tables. Other data types that are not listed are not supported currently.
Category |
Data Type |
Description |
Length |
|---|---|---|---|
Numeric Type |
smallint |
Small integer, also called INT2 |
2 |
integer |
Typical choice for integer, also called INT4 |
4 |
|
bigint |
Big integer, also called INT8 |
8 |
|
decimal |
Arbitrary precision type |
Variable length |
|
numeric |
Arbitrary precision type |
Variable length |
|
real |
Single-precision floating point |
4 |
|
double precision |
Double-precision floating point |
8 |
|
smallserial |
Two-byte auto-incrementing integer |
2 |
|
serial |
Four-byte auto-incrementing integer |
4 |
|
bigserial |
Eight-byte auto-incrementing integer |
8 |
|
Monetary Type |
money |
Currency amount |
8 |
Character Type |
character varying(n), varchar(n) |
Variable-length string |
Variable length |
character(n), char(n) |
Fixed-length string |
n |
|
character, char |
Single-byte internal type |
1 |
|
text |
Variable-length string |
Variable length |
|
nvarchar2 |
Variable-length string |
Variable length |
|
clob |
A big text object |
Variable length |
|
Date/Time Type |
timestamp with time zone |
Date and time (with time zone) |
8 |
timestamp without time zone |
Date and time |
8 |
|
date |
Date and time (Oracle compatibility mode); date (other compatibility modes) |
When using Oracle compatibility mode, the storage space is 8 bytes, whereas in other compatibility modes, it is 4 bytes. |
|
time without time zone |
Time within one day. |
8 |
|
time with time zone |
Time within one day (with time zone) |
12 |
|
interval |
Time interval |
16 |