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https://dev.mysql.com/doc/refman/8.0/en/server-status-variables.html
For additional connection-related information, check the Connection_errors_xxx status variables and the host_cache table. All Com_stmt_xxx variables are increased even if a prepared statement argument is unknown or an error occurred during execution. Connection_errors_xxx These variables provide information about errors that occur during the client connection ...
https://dev.mysql.com/doc/refman/8.0/en/data-masking-component-functions.html
Return value: The masked Canada SIN as a string encoded in the utf8mb4 character set, an error if the argument is not the correct length, or NULL if str is in incorrect format or contains a multibyte character. Return value: The masked International ...Example: mysql> SELECT mask_canada_sin('046-454-286'), mask_canada_sin('abcdefijk'); +--------------------------------+------------------------------+ | mask_canada_sin('046-454-286') | mask_canada_sin('abcdefijk') | +--------------------------------+------------------------------+ | XXX-XXX-XXX | XXXXXXXXX | +--------------------------------+------------------------------+ mysql> SELECT mask_canada_sin('909'); ERROR 1123 (HY000): Can't initialize function 'mask_canada_sin'; Argument 0 is too ...
https://dev.mysql.com/doc/refman/8.0/en/replication-solutions-scaleout.html
Figure 19.1 Using Replication to Improve Performance During Scale-Out If the part of your code that is responsible for database access has been properly abstracted/modularized, converting it to run with a replicated setup should be very smooth and ... You can use replication as a scale-out solution; that is, where you want to split up the load of database queries across multiple database servers, within some reasonable ...
https://dev.mysql.com/doc/refman/8.0/en/charset-cp932.html
For example, “SHIFT JIS” used in Japanese Windows environments is a Microsoft extension of Shift_JIS and its exact name is Microsoft Windows Codepage : 932 or cp932. There are several conversion rules from so-called “SHIFT JIS” to Unicode, ... Why is cp932 needed? In MySQL, the sjis character set corresponds to the Shift_JIS character set defined by IANA, which supports JIS X0201 and JIS X0208 ...
https://dev.mysql.com/doc/refman/8.0/en/date-and-time-literals.html
row *************************** Level: Warning Code: 4095 Message: Delimiter '@' in position 4 in datetime value '2012@12@31' at row 1 is deprecated. row *************************** Level: Warning Code: 4095 Message: Delimiter '^' in position 4 in ... Standard SQL and ODBC Date and Time Literals String and Numeric Literals in Date and Time Context Date and time values can be represented in several formats, such as quoted strings or as numbers, depending on the exact type of the value and other ...
https://dev.mysql.com/doc/refman/8.0/en/installing.html
You can choose from pre-packaged distributions containing binary (precompiled) programs or source code. Oracle also provides access to the MySQL source code for those who want to see recent developments and test new code. For details and ...A ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-summary-tables.html
Summary tables provide aggregated information for terminated events over time. The tables in this group summarize event data in different ways. Each summary table has grouping columns that determine how to group the data to be aggregated, and ...
https://dev.mysql.com/doc/refman/8.0/en/declare-handler.html
statement handler_action: { CONTINUE | EXIT | UNDO } condition_value: { mysql_error_code | SQLSTATE [VALUE] sqlstate_value | condition_name | SQLWARNING | NOT FOUND | SQLEXCEPTION } The DECLARE ... It can take the following forms: mysql_error_code: ...SQLSTATE [VALUE] sqlstate_value: A 5-character string literal indicating an SQLSTATE value, such as '42S01' to specify “unknown table”: DECLARE CONTINUE HANDLER FOR SQLSTATE '42S02' BEGIN -- body of handler END; Do not use SQLSTATE values that begin with '00' because those indicate success rather than an error ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-table-reference.html
The following table summarizes all available Performance Schema tables. For greater detail, see the individual table descriptions. Table 29.1 Performance Schema Tables Table Name Description Introduced accounts Connection statistics per client ...
https://dev.mysql.com/doc/refman/8.0/en/handler-scope.html
A specific handler is for a MySQL error code, SQLSTATE value, or condition name. For example, there might be a specific MySQL error code handler in an outer block, and a general SQLWARNING handler in an inner block. Or there might be handlers for a ...The condition raised by the statement goes unhandled and terminates the procedure with an error: mysql> CALL p4(); ERROR 1051 (42S02): Unknown table ...