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RowResult::getColumnCount — Get column count
Retrieve the column count for columns present in the result set.
此函数没有参数。
The number of columns,
or FALSE if the result set is empty.
Example #1 mysql_xdevapi\RowResult::getColumnCount() example
<?php
$session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");
$session->sql("DROP DATABASE addressbook")->execute();
$session->sql("CREATE DATABASE foo")->execute();
$session->sql("CREATE TABLE foo.test_table(x int)")->execute();
$session->sql("INSERT INTO addressbook.names values ('John', 42), ('Sam', 33)")->execute();
$sql = $session->sql("SELECT * from addressbook.names")->execute();
echo $sql->getColumnCount();
以上例程的输出类似于：
2