--- /dev/null
+--
+-- patch-l10n_cache-primary-key.sql
+--
+-- Bug T146591. Add l10n_cache primary key
+DROP TABLE IF EXISTS /*_*/l10n_cache;
+
+CREATE TABLE /*$wgDBprefix*/l10n_cache (
+ lc_lang varbinary(32) NOT NULL,
+ lc_key varchar(255) NOT NULL,
+ lc_value mediumblob NOT NULL,
+ PRIMARY KEY (lc_lang, lc_key)
+) /*$wgDBTableOptions*/;