How to make field NOT NULL PostgreSQL Yii2 Alter Table?

Question

PostgreSQL

Hello! I have a migration in which the result field of the transactions table must be made NOT NULL .
If use

$this->alterColumn('transactions', 'result', Schema::TYPE_INTEGER . ' SET NOT NULL');

Then the error Syntax error: 7 ERROR: syntax error at or near "set" takes off . If you remove SET , then the error falls out on the word NOT , etc.
And so a question: how to make a field NOT NULL in migration ?
PostgreSQL, Yii2.

Answer 1

$this->alterColumn('transactions', 'result', Schema::TYPE_INTEGER);
$this->alterColumn('transactions', 'result', 'SET NOT NULL');