Tid scan improvements

    Attachment (v11-0001-Fix-hypothetical-bug-in-heap-backward-scans.patch) at 2021-01-21 05:16:09 from David Rowley <dgrowleyml at gmail.com> (Patch: Yes)
    Attachment (v10-0001-first-cut.patch) at 2021-01-01 01:30:20 from David Fetter <david at fetter.org> (Patch: Yes)
    Attachment (v8_to_v9_delta.patch) at 2019-07-17 11:10:52 from David Rowley <david.rowley at 2ndquadrant.com> (Patch: Yes)
    Attachment (v8-0001-Add-a-new-plan-type-Tid-Range-Scan-to-support-range-.patch) at 2019-07-15 05:54:15 from Edmund Horner <ejrh00 at gmail.com> (Patch: Yes)
    Attachment (v7-0001-Add-selectivity-estimate-for-CTID-system-variables.patch) at 2019-03-15 05:42:40 from Edmund Horner <ejrh00 at gmail.com> (Patch: Yes)
    Attachment (v6-0001-Add-selectivity-estimate-for-CTID-system-variables.patch) at 2019-02-04 05:37:33 from Edmund Horner <ejrh00 at gmail.com> (Patch: Yes)
    Attachment (v5-0001-Add-selectivity-and-nullness-estimates-for-CTID-syst.patch) at 2018-11-27 08:16:46 from Edmund Horner <ejrh00 at gmail.com> (Patch: Yes)
    Attachment (fixes_for_v4_0001.diff) at 2018-11-22 07:41:10 from David Rowley <david.rowley at 2ndquadrant.com> (Patch: Yes)
    Attachment (v4-0001-Add-selectivity-and-nullness-estimates-for-CTID-syst.patch) at 2018-11-12 04:35:45 from Edmund Horner <ejrh00 at gmail.com> (Patch: Yes)
    Attachment (remove-obsolete-ExecStoreTuple-notes.patch) at 2018-11-07 22:31:05 from Edmund Horner <ejrh00 at gmail.com> (Patch: Yes)
    Attachment (v3-0002-Support-range-quals-in-Tid-Scan.patch) at 2018-11-04 04:20:32 from Edmund Horner <ejrh00 at gmail.com> (Patch: Yes)
    Attachment (tid_scan_improvements-v2.patch) at 2018-09-28 06:13:06 from Edmund Horner <ejrh00 at gmail.com> (Patch: Yes)
    Attachment (tid_scan_improvements-v1.patch) at 2018-09-28 05:02:04 from Edmund Horner <ejrh00 at gmail.com> (Patch: Yes)
    Attachment (01_tid_scan_ordering.patch) at 2018-08-12 02:29:05 from Edmund Horner <ejrh00 at gmail.com> (Patch: Yes)