| drop
| <error>
+alter: /alter/i TABLE table_name /add/i table_constraint ';'
+ {
+ my $constraint = $item{table_constraint};
+ $constraint->{type} = $constraint->{constraint_type};
+ push @{$tables{$item{table_name}}{constraints}}, $constraint;
+ }
+
alter : /alter/i WORD /[^;]+/ ';'
{ @table_comments = () }