<ddl_statement> ::=
<
create_table_statement
>
| <
drop_table_statement
>
| <
alter_table_statement
>
| <
rename_table_statement
>
| <
rename_column_statement
>
| <
exists_table_statement
>
| <
create_domain_statement
>
| <
drop_domain_statement
>
| <
create_sequence_statement
>
| <
drop_sequence_statement
>
| <
create_synonym_statement
>
| <
drop_synonym_statement
>
| <
rename_synonym_statement
>
| <
create_view_statement
>
| <
drop_view_statement
>
| <
rename_view_statement
>
| <
create_index_statement
>
| <
drop_index_statement
>
| <
alter_index_statement
>
| <
rename_index_statement
>
| <
comment_on_statement
>
| <
create_trigger_statement
>
| <
drop_trigger_statement
>
| <
create_dbproc_statement
>
| <
drop_dbproc_statement
>