@Override
    public Optional<DatabaseAdminExecutor> create(final SQLStatementContext sqlStatementContext) {
        SQLStatement sqlStatement = sqlStatementContext.getSqlStatement();
        if (sqlStatement instanceof ShowStatement) {
            return Optional.of(new PostgreSQLShowVariableExecutor((ShowStatement) sqlStatement));
        }
        return Optional.empty();
    }
@Test
    void assertCreateWithShowSQLStatement() {
        Optional<DatabaseAdminExecutor> actual = new PostgreSQLAdminExecutorCreator().create(new UnknownSQLStatementContext(new PostgreSQLShowStatement("client_encoding")));
        assertTrue(actual.isPresent());
        assertThat(actual.get(), instanceOf(PostgreSQLShowVariableExecutor.class));
    }