Usage:

$smcFunc['db_change_column'] (table_name, old_column, column_info, parameters, error)

Description: This function allows for changing an existing column structure.

Parameters:

• table_name (string) the name of an existing table
• old_column (array) an array of data containing the following keys:
  • name (string) the name of the column
  • type (string) the type of the column (e.g. int, tinyint, varchar, text, etc.)
  • size (integer) defines the size of the column (if required by type)
  • null (boolean) whether to use null or not null
  • default (integer or string depending on type) should contain the default value for the column
  • auto (boolean) whether the column uses auto_increment or not
  • unsigned (boolean) specifies whether the column is unsigned or not (applicable only to MySQL).
• column_info (array) deprecated as of 2.0 RC3, leave empty
• parameters
• error (string) what to do if an error was encountered, default fatal

Return: (bool) true if column added (changed); false otherwise.