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In preparation of freezing and counting tuples which are not candidates for pruning, split heap_prune_record_unchanged() into multiple functions, depending the kind of line pointer. That's not too interesting right now, but makes the next commit smaller. Recording the lowest soon-to-be prunable xid is one of the actions we take for unchanged LP_NORMAL item pointers but not for others, so move that to the new heap_prune_record_unchanged_lp_normal() function. The next commit will add more actions to these functions. Author: Melanie Plageman <melanieplageman@gmail.com> Discussion: https://www.postgresql.org/message-id/20240330055710.kqg6ii2cdojsxgje@liskov