DOCS-6424 Document create_tmp_table_binlog_formats for ES 11.8.9-6

[mariadb-udaydubey]

Documents the create_tmp_table_binlog_formats system variable for MariaDB Enterprise Server, per DOCS-6424 (→ MENT-2792 → MDEV-36099).

Changes

replication-and-binary-log-system-variables.md

• Corrected Data Type from enum to set — the variable is a Sys_var_set, which is why MIXED,STATEMENT is a valid value.
• Added an Enterprise Server hint block covering:
  • the MIXED,STATEMENT default starting with 11.8.9-6, versus the Community Server default of STATEMENT;
  • that earlier Enterprise Server 11.8 releases do not have the variable at all;
  • the MIXED-implies-STATEMENT auto-upgrade, its warning 1292, and the fact that SELECT returns the upgraded value rather than what was assigned.

system-variables-added-in-enterprise-server-11.8.md

• Added a row for the variable. The Added cell reads Enterprise Server 11.8 to match every sibling row; the precise 11.8.9-6 version is carried by the hint block linked from that row.

Source verification

All claims verified against the enterprise repo at 72bfb892c8537baa3e0e5ea16e24e79171a9be22 (origin/11.8-enterprise), cross-checked against community origin/main. A fact-check report with 15 claims (doc file:line → source file:line @ SHA → verdict) accompanies DOCS-6424 and will be posted to the ticket on handoff.

Two points worth reviewer attention:

• The version is 11.8.9-6, not 11.8. create_temporary_table_binlog_formats is introduced on origin/11.8-enterprise by 1955f1a9b0c (dated 2026-08-31) — the first and only commit adding it. The tree at 11.8.8-5's release date (2026-06-26) contains zero occurrences. 11.8.9-6 is unreleased as of this PR; its release-note pages are in flight under DOCS-6574.
• The warning paragraph is deliberately not version-scoped. The auto-upgrade and warning 1292 are identical in Community Server 12.0.1+ (throw_bounds_warning in community sql/sys_vars.cc is byte-identical), so qualifying that sentence to 11.8.9-6 would wrongly imply Community lacks the warning.

Notes

• The four bug fixes backported alongside MDEV-36099 (MDEV-36566, 36735, 36980, 37785) were all confirmed present as ancestors of 72bfb892c8. Only MDEV-36980 warrants a changelog entry; that bullet has been handed to DOCS-6574 rather than added here.
• CI is the authoritative link check — lychee cannot validate external URLs behind this machine's TLS interception. Local verification: codespell clean, lychee --offline 0 errors over 311 local links, GitBook blocks balanced. The 36 pre-existing raw app.gitbook.com URLs on the reference page are untouched (36 on main, 36 here).

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