Build/Test Tools: Add MySQL 9.7 to relevenat test matrices.

This adds `9.7` (released on April 21, 2026) to the relevant testing strategies and makes it the default version in the local Docker environment.

MySQL 9.7 is also an LTS release.

Props chrisdavidmiles.
See #64894.

git-svn-id: https://develop.svn.wordpress.org/trunk@62407 602fd350-edb4-49c9-b593-d223f7449a82

Author: desrosj

.env.example

@@ -46,12 +46,12 @@ LOCAL_DB_TYPE=mysql
 ##
 # The database version to use.
 #
-# Defaults to 8.0 with the assumption that LOCAL_DB_TYPE is set to `mysql` above.
+# Defaults to 9.7 with the assumption that LOCAL_DB_TYPE is set to `mysql` above.
 #
 # When using `mysql`, see https://hub.docker.com/_/mysql for valid versions.
 # When using `mariadb`, see https://hub.docker.com/_/mariadb for valid versions.
 ##
-LOCAL_DB_VERSION=8.4
+LOCAL_DB_VERSION=9.7
 
 # Whether or not to enable multisite.
 LOCAL_MULTISITE=false

.github/workflows/install-testing.yml

@@ -94,11 +94,12 @@ jobs:
           - db-version: '9.3'
           - db-version: '9.4'
           - db-version: '9.5'
+          - db-version: '9.6'
           # MySQL 9.0+ will not work on PHP 7.2 & 7.3. See https://core.trac.wordpress.org/ticket/61218.
           - php: '7.2'
-            db-version: '9.6'
+            db-version: '9.7'
           - php: '7.3'
-            db-version: '9.6'
+            db-version: '9.7'
 
     services:
       database:

.github/workflows/local-docker-environment.yml

@@ -108,6 +108,7 @@ jobs:
           - db-version: '9.3'
           - db-version: '9.4'
           - db-version: '9.5'
+          - db-version: '9.6'
           # No PHP 8.5 + Memcached support yet.
           - php: '8.5'
             memcached: true

.github/workflows/phpunit-tests.yml

@@ -76,7 +76,7 @@ jobs:
         os: [ ubuntu-24.04 ]
         php: [ '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5' ]
         db-type: [ 'mysql' ]
-        db-version: [ '5.7', '8.0', '8.4' ]
+        db-version: [ '5.7', '8.0', '8.4', '9.7' ]
         tests-domain: [ 'example.org' ]
         multisite: [ false, true ]
         memcached: [ false ]
@@ -209,15 +209,13 @@ jobs:
         os: [ ubuntu-24.04 ]
         php: [ '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5' ]
         db-type: [ 'mysql', 'mariadb' ]
-        db-version: [ '9.6', '12.1' ]
+        db-version: [ '12.1' ]
         multisite: [ false, true ]
         memcached: [ false ]
         db-innovation: [ true ]
 
         exclude:
           # Exclude version combinations that don't exist.
-          - db-type: 'mariadb'
-            db-version: '9.6'
           - db-type: 'mysql'
             db-version: '12.1'
     with:
@@ -283,14 +281,14 @@ jobs:
       fail-fast: false
       matrix:
         php: [ '7.4', '8.4' ]
-        db-version: [ '8.4', '11.8' ]
+        db-version: [ '9.7', '11.8' ]
         db-type: [ 'mysql', 'mariadb' ]
         multisite: [ false ]
 
         include:
           # Include one multisite job for each database type.
           - php: '8.4'
-            db-version: '8.4'
+            db-version: '9.7'
             db-type: 'mysql'
             multisite: true
           - php: '8.4'
@@ -299,13 +297,13 @@ jobs:
             multisite: true
           # Test with memcached.
           - php: '8.4'
-            db-version: '8.4'
+            db-version: '9.7'
             db-type: 'mysql'
             multisite: true
             memcached: true
           # Run specific test groups once.
           - php: '8.4'
-            db-version: '8.4'
+            db-version: '9.7'
             db-type: 'mysql'
             phpunit-test-groups: 'html-api-html5lib-tests'
 
@@ -314,7 +312,7 @@ jobs:
           - db-type: 'mysql'
             db-version: '11.8'
           - db-type: 'mariadb'
-            db-version: '8.4'
+            db-version: '9.7'
 
     with:
       php: ${{ matrix.php }}

.github/workflows/upgrade-testing.yml

@@ -70,7 +70,7 @@ jobs:
         os: [ 'ubuntu-24.04' ]
         php: [ '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5' ]
         db-type: [ 'mysql' ]
-        db-version: [ '5.7', '8.0', '8.4', '9.6' ]
+        db-version: [ '5.7', '8.0', '8.4', '9.7' ]
         wp: [ '6.9', '7.0' ]
         multisite: [ false, true ]
     with:
@@ -179,7 +179,7 @@ jobs:
         os: [ 'ubuntu-24.04' ]
         php: [ '7.4' ]
         db-type: [ 'mysql' ]
-        db-version: [ '5.7', '8.0', '8.4', '9.6' ]
+        db-version: [ '5.7', '8.0', '8.4', '9.7' ]
         wp: [ '4.7' ]
         multisite: [ false, true ]
     with:

.version-support-mysql.json

@@ -1,12 +1,6 @@
 {
 	"7-1": [
-		"9.6",
-		"9.5",
-		"9.4",
-		"9.3",
-		"9.2",
-		"9.1",
-		"9.0",
+		"9.7",
 		"8.4",
 		"8.0",
 		"5.7",