trigram-based index searches for <literal>LIKE</literal>, <literal>ILIKE</literal>,

<literal>~</literal> and <literal>~*</literal> queries. Beginning in

<productname>PostgreSQL</productname> 14, these indexes also support

equality operator (simple comparison operators are not supported).

theequality operator (simple comparison operators are not supported).

Note that those indexes may not be as efficient as regular B-tree indexes

for equality operator.

</para>