[FOLLOWUP][TASK] Migrate pages_language_overlay into pages

An additional SQL index is added to the database.

Resolves: #82445
Releases: master
Change-Id: I94d1eab5f492b465fafbf3620b0f532e1403be76
Reviewed-on: https://review.typo3.org/54591


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Alexander Schnitzler <review.typo3.org@alexanderschnitzler.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>

typo3/sysext/core/ext_tables.sql

@@ -165,7 +165,8 @@ CREATE TABLE pages (
 	KEY t3ver_oid (t3ver_oid,t3ver_wsid),
 	KEY parent (pid,deleted,sorting),
 	KEY alias (alias),
-	KEY determineSiteRoot (is_siteroot)
+	KEY determineSiteRoot (is_siteroot),
+	KEY language_identifier (l10n_parent,sys_language_uid)
 );
 
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