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PG_HASHBUCKET
Updated on 2025-08-19 GMT+08:00
PG_HASHBUCKET
PG_HASHBUCKET records hash bucket information.
|
Name |
Type |
Description |
|---|---|---|
|
oid |
oid |
Row identifier (hidden attribute, which must be specified) |
|
bucketid |
oid |
Hash value calculated for a bucket vector. The hash value can be used to accelerate the search for a bucket vector. |
|
bucketcnt |
integer |
Number of shards |
|
bucketmapsize |
integer |
Total number of shards on all DNs |
|
bucketref |
integer |
Reserved column with 1 as its default value |
|
bucketvector |
oidvector_extend |
Records all bucket IDs contained in the bucket information in this row. A unique index is created in this column. Tables with the same bucket ID share the PG_HASHBUCKET data in the same row. |
Parent topic: System Catalogs
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