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pgcolumnar_zonemap_survival still sizes groups from the planning session's stripe_row_limit (second half of #806)

Status: Open.

#817 In commandprompt/pgcolumnar;

· OffgridwithJD opened on Aug 28, 2026

An upper-bounded ratio cannot be proved by an ablation that degrades both arms: #359's fetch-cache guard needs a separating mutation

Status: Open.

#795 In commandprompt/pgcolumnar;

· OffgridwithJD opened on Aug 28, 2026

A columnar text projection costs 3.4x the heap with the per-value copy excluded, and the remainder is in the decode path

enhancementNew feature or requestNew feature or request

Status: Open.

#768 In commandprompt/pgcolumnar;

· jdatcmd opened on Aug 27, 2026

The columnar scan is priced 1.9x to 3.4x below the heap per unit of work, and seq_page_cost decides whether that is a defect

enhancementNew feature or requestNew feature or request

Status: Open.

#766 In commandprompt/pgcolumnar;

· jdatcmd opened on Aug 27, 2026

A runtime filter is worth nothing unless the fact table is clustered on the join key, and the fold a join removes is worth 4.1x but is off by default

enhancementNew feature or requestNew feature or request

Status: Open.

#752 In commandprompt/pgcolumnar;

· jdatcmd opened on Aug 26, 2026

Now that we have gone alpha, perhaps it is time to port our tests

Status: Open.

#432 In commandprompt/pgcolumnar;

· jdatcmd opened on Aug 5, 2026

Opportunities from the ClickHouse VLDB 2024 paper, ranked against what we already have

enhancementNew feature or requestNew feature or request

Status: Open.

#403 In commandprompt/pgcolumnar;

· OffgridwithJD opened on Aug 4, 2026