WordPress database error: [Lost connection to MySQL server during query]
SHOW COLUMNS FROM lnp8au_pluginSL_shorturl LIKE 'url_externe'

WordPress database error: [Duplicate column name 'url_externe']
ALTER TABLE lnp8au_pluginSL_shorturl ADD url_externe VARCHAR( 255 ) NOT NULL DEFAULT '';

WordPress database error: [Can't DROP 'id_post'; check that column/key exists]
ALTER TABLE lnp8au_pluginSL_shorturl DROP INDEX id_post;

WordPress database error: [BLOB/TEXT column 'url_externe' used in key specification without a key length]
ALTER TABLE lnp8au_pluginSL_shorturl ADD CONSTRAINT id_post UNIQUE (id_post,url_externe)

WordPress › Fejl

Error reconnecting to the database

This means that we lost contact with the database server at localhost. This could mean your host's database server is down.

If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the WordPress Support Forums.