WordPress database error: [Disk full (/tmp/#sql_1c1_0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")]
SHOW COLUMNS FROM wp_petition_signatures LIKE 'fields'

WordPress database error: [Duplicate column name 'fields']
ALTER TABLE wp_petition_signatures ADD `fields` TEXT;

WordPress database error: [Disk full (/tmp/#sql_1c1_0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")]
SHOW COLUMNS FROM wp_petition_signatures LIKE 'keep_private'

WordPress database error: [Duplicate column name 'keep_private']
ALTER TABLE wp_petition_signatures ADD `keep_private` enum('on','off') NOT NULL default 'off';