Diagnostics
The diagnostics area contains information about the error conditions which were produced by an SQL statement, as well as some information about the statement which generated them.
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Error Codes
MariaDB error codes and SQLSTATE codes -
DECLARE CONDITION
For declaring a named error condition (SQLSTATE or error code). -
DECLARE HANDLER
Construct to declare how errors are handled. -
Diagnostics Area
A description of the diagnostics area and how it is populated. -
GET DIAGNOSTICS
Copy information about the diagnostics area into variables. -
RESIGNAL
Used to send a SIGNAL again for the previous error. -
SHOW ERRORS
Displays errors. -
SHOW WARNINGS
Displays errors, warnings and notes. -
SIGNAL
May be used to produce a custom error message. -
SQL Error Log Plugin
Records SQL-level errors to a log file. -
SQLSTATE
A string which identifies a condition's class and subclass
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