KnowForgeTables
Schemas
qianmoQ· 更新于 2026-09-21· 阅读 5 分钟· 0 次阅读登录后可跨设备保存划线和私人笔记登录
Schemas🔗
Iceberg tables support the following types:
| Type | Description | Notes |
|---|---|---|
boolean | True or false | |
int | 32-bit signed integers | Can promote to long |
long | 64-bit signed integers | |
float | 32-bit IEEE 754 floating point | Can promote to double |
double | 64-bit IEEE 754 floating point | |
decimal(P,S) | Fixed-point decimal; precision P, scale S | Scale is fixed and precision must be 38 or less |
date | Calendar date without timezone or time | |
time | Time of day without date, timezone | Stored as microseconds |
timestamp | Timestamp without timezone | Stored as microseconds |
timestamptz | Timestamp with timezone | Stored as microseconds |
timestamp_ns | Timestamp without timezone, nanosecond precision | Stored as nanoseconds; added in v3 |
timestamptz_ns | Timestamp with timezone, nanosecond precision | Stored as nanoseconds; added in v3 |
string | Arbitrary-length character sequences | Encoded with UTF-8 |
uuid | Universally unique identifiers | |
fixed(L) | Fixed-length byte array of length L | |
binary | Arbitrary-length byte array | |
variant | Semi-structured data (JSON-like) | Added in v3 |
geometry(C) | Geospatial features with CRS parameter | Linear edge-interpolation; added in v3 |
geography(C, A) | Geospatial features with CRS and edge algorithm | Non-linear edge-interpolation; added in v3 |
unknown | Placeholder type for undetermined columns | Must be optional; added in v3 |
struct<...> | A record with named fields of any data type | |
list<E> | A list with elements of any data type | |
map<K, V> | A map with keys and values of any data type |
Iceberg tracks each field in a table schema using an ID that is never reused in a table. See correctness guarantees for more information.
评论
登录后参与评论
正在加载评论…