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ducklake_column_tag

Columns can also have tags, those are defined in this table.

Column name Column type  
table_id BIGINT  
column_id BIGINT  
begin_snapshot BIGINT  
end_snapshot BIGINT  
key VARCHAR  
value VARCHAR  
  • table_id refers to a table_id from the ducklake_table table.
  • column_id refers to a column_id from the ducklake_column table.
  • begin_snapshot refers to a snapshot_id from the ducklake_snapshot table. The tag is valid starting with this snapshot id.
  • end_snapshot refers to a snapshot_id from the ducklake_snapshot table. The tag is valid until this snapshot id. If end_snapshot is NULL, the tag is currently valid.
  • key is an arbitrary key string. The key can't be NULL.
  • value is the arbitrary value string.