sql - how to understand "can't connect" mysql error messages? -

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i have following error message:

sqlstate[hy000] [2003] can't connect mysql server on '192.168.50.45' (4)

how parse (i have hy000, have 2003 , have (4).

hy000 general odbc-level error code, , 2003 mysql-specific error code means initial server connection failed. 4 error code failed os-level call mysql driver tried make. (for example, on linux see "(111)" when connection refused, because connect() call failed econnrefused error code, has value of 111.)


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