Function: Executes changes made in WordPress 4.4.0.

Function: Executes changes made in WordPress 4.3.1.

Function: Determine if global tables should be upgraded.

Function: Executes changes made in WordPress 4.3.0.

Function: Executes comments changes made in WordPress 4.3.0.

Function: Execute changes made in WordPress 4.2.0.

Function: Execute changes made in WordPress 4.2.2.

Function: Execute changes made in WordPress 4.2.1.

Function: Execute changes made in WordPress 4.2.0.

Function: If a table only contains utf8 or utf8mb4 columns, convert it to utf8mb4.

Function: Maybe enable pretty permalinks on installation.

Function: Execute changes made in WordPress 4.0.0.

Function: Runs before the schema is upgraded.

Function: Install global terms.

Function: Updates the database tables to a new schema.

Function: Updates the database tables to a new schema, but without displaying results.

Function: Creates a site theme from an existing theme.

Function: Creates a site theme from the default theme.

Function: Creates a site theme.

Function: Translate user level to user role name.

Function: Checks the version of the installed MySQL binary.

Function: Disables the Automattic widgets plugin, which was merged into core.

Function: Disables the Link Manager on upgrade if, at the time of upgrade, no links exist in the DB.

Function: Executes network-level upgrade routines.

Function: Creates a table in the database if it doesn’t already exist.

Function: Drops a specified index from a table.

Function: Execute changes made in WordPress 2.9.