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(mysql.info)mysql_errno

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`mysql_errno()'
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`unsigned int mysql_errno(MYSQL *mysql)'

Description
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For the connection specified by `mysql', `mysql_errno()' returns the
error code for the most recently invoked API function that can succeed
or fail.  A return value of zero means that no error occurred. Client
error message numbers are listed in the MySQL `errmsg.h' header file.
Server error message numbers are listed in `mysqld_error.h'. In the
MySQL source distribution you can find a complete list of error
messages and error numbers in the file `Docs/mysqld_error.txt'.

Return Values
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An error code value. Zero if no error occurred.

Errors
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None.