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 zonetz	Snapshot time.
snpxmin	bigint	Minimum transaction ID snapshots.
snpcsn	bigint	Commit sequence number (CSN) snapshots.
snpsnapshot	text	Serialized snapshot text.