Documentation Home
MySQL 8.0 Reference Manual
Related Documentation Download this Manual
PDF (US Ltr) - 43.1Mb
PDF (A4) - 43.2Mb
Man Pages (TGZ) - 295.4Kb
Man Pages (Zip) - 400.6Kb
Info (Gzip) - 4.3Mb
Info (Zip) - 4.3Mb
Excerpts from this Manual

MySQL 8.0 Reference Manual  /  ...  /  Restrictions on Condition Handling

15.6.8 Restrictions on Condition Handling

SIGNAL, RESIGNAL, and GET DIAGNOSTICS are not permissible as prepared statements. For example, this statement is invalid:

PREPARE stmt1 FROM 'SIGNAL SQLSTATE "02000"';

SQLSTATE values in class '04' are not treated specially. They are handled the same as other exceptions.

In standard SQL, the first condition relates to the SQLSTATE value returned for the previous SQL statement. In MySQL, this is not guaranteed, so to get the main error, you cannot do this:

GET DIAGNOSTICS CONDITION 1 @errno = MYSQL_ERRNO;

Instead, do this:

GET DIAGNOSTICS @cno = NUMBER;
GET DIAGNOSTICS CONDITION @cno @errno = MYSQL_ERRNO;