Mysql gone away when importing DB on create wp_posts indexes

[jasmines]

Already imported the table and its data.
When I execute the following:

ALTER TABLE wp_posts

ADD PRIMARY KEY (ID),
ADD KEY post_name (post_name(191)),
ADD KEY type_status_date (post_type,post_status,post_date,ID),
ADD KEY post_parent (post_parent),
ADD KEY post_author (post_author);

I have 2013 error (in console) or 2006 (in phpmyadmin) immediately.