SET name = (name::text || name::text)::integer;
WARNING: old table = 1=11,2=22,3=33, new table = 1=1111,2=2222,3=3333
NOTICE: one = 1
--- now drop column 'name'
+-- now drop column 'name'
ALTER TABLE alter_table_under_transition_tables
DROP column name;
UPDATE alter_table_under_transition_tables
UPDATE alter_table_under_transition_tables
SET name = (name::text || name::text)::integer;
--- now drop column 'name'
+-- now drop column 'name'
ALTER TABLE alter_table_under_transition_tables
DROP column name;
UPDATE alter_table_under_transition_tables