GS_TXN_SNAPSHOT

GS_TXN_SNAPSHOT is a timestamp-CSN mapping table. It periodically samples and maintains an appropriate time range to estimate the CSN value corresponding to the timestamp in the range.

**Table 1** GS_TXN_SNAPSHOT columns
Name	Data Type	Description
snptime	timestamp with time zone	Snapshot time
snpxmin	bigint	Minimum snapshot ID
snpcsn	bigint	Snapshot CSN
snpsnapshot	text	Serialized snapshot text

Parent topic: Other System Catalogs

Previous topic: GS_TABLESTATS_HISTORY

Next topic: GS_UID

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