Data Types
In most cases, you don't need to create streams manually or specify the data type for the columns. Timeplus source will automatically create the streams/columns with proper types when you load data from Kafka/CSV/etc.
Like many analytics systems, the following common types are supported.
| Category | Type | Example | Note | Related functions |
|---|---|---|---|---|
| Numeric Types | integer | -100 | default with 4 bytes. You can also use int, smallint, bigint, or even uint16 etc. | to_int |
| decimal | 3.14 | decimal(precision, scale). Valid range for precision is [1: 76], valid range for scale is [0: precision] | to_decimal | |
| float | -3.1415 | default with 4 bytes. You can also use float64 or double for 8 bytes | to_float | |
| Boolean Type | bool | true | true or false | |
| String Type | string | 'Hello' | strings of an arbitrary length. You can also use varchar To create string columns with fixed size in bytes, use fixed_string(positiveInt) | to_string, etc. |
| Universally Unique Identifier | uuid | 1f71acbf-59fc-427d-a634-1679b48029a9 | a universally unique identifier (UUID) is a 16-byte number used to identify records. For detailed information about the UUID, see Wikipedia | uuid |
| IP address | ipv4 | '116.253.40.133' | IPv4 addresses. Stored in 4 bytes as uint32. | to_ipv4 |
| ipv6 | '2a02:aa08:e000:3100::2' | IPv6 addresses. Stored in 16 bytes as uint128. | to_ipv6 | |
| Date and Time Types | date | '2022-05-16' | without time | to_date, today |
| datetime | '2022-05-16 11:01:02' | with second | to_time, now | |
| datetime64 | '2022-05-16 11:01:02.345' | with millisecond, same as datetime64(3) | to_time, now64 | |
| Compound Types | array | [1,2] | access 1st element via array[1] | length, array_concat |
| map | map_cast('k1','v1','k2','v2') | access key1 via map['key1'] | map_cast | |
| tuple | (1,2) | access 1st element via tuple.1 | tuple_cast |