Search Results
https://dev.mysql.com/doc/refman/9.7/en/json-search-functions.html
The functions in this section perform search or comparison operations on JSON values to extract data from them, report whether data exists at a location within them, or report the path to data within them. JSON_CONTAINS(target, candidate[, path]) ...
https://dev.mysql.com/doc/refman/9.7/en/locking-service.html
If the intent is for there to be a correspondence between rows inserted and locks acquired, that intent is not satisfied. MySQL distributions provide a locking interface that is accessible at two levels: At the SQL level, as a set of loadable ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-programs-ndb-blob-tool.html
This tool can be used to check for and remove orphaned BLOB column parts from NDB tables, as well as to generate a file listing any orphaned parts. It is sometimes useful in diagnosing and repairing corrupted or damaged NDB tables containing BLOB ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-programs-ndb-desc.html
ndb_desc provides a detailed description of one or more NDB tables. Usage ndb_desc -c connection_string tbl_name -d db_name [options] ndb_desc -c connection_string index_name -d db_name -t tbl_name Additional options that can be used with ndb_desc ...
https://dev.mysql.com/doc/refman/9.7/en/optimizing-innodb-transaction-management.html
Where practical, wrap several related data change operations into a single transaction, by issuing SET AUTOCOMMIT=0 or a START TRANSACTION statement, followed by a COMMIT statement after making all the changes. Avoid performing rollbacks after ...
https://dev.mysql.com/doc/refman/9.7/en/partitioning-types.html
With this type of partitioning, a partition is selected based on the value returned by a user-defined expression that operates on column values in rows to be inserted into the table. When a new row is inserted into a partitioned table, it is these ... This section discusses the types of partitioning which are available in MySQL ...
https://dev.mysql.com/doc/refman/9.7/en/string-literals.html
As an alternative to explicitly escaping special characters, many MySQL APIs provide a placeholder capability that enables you to insert special markers into a statement string, and then bind data values to them when you issue the statement. A ...
https://dev.mysql.com/doc/refman/9.7/en/sys-ps-thread-trx-info.html
Returns a JSON object containing information about a given thread. The information includes the current transaction, and the statements it has already executed, derived from the Performance Schema events_transactions_current and ...
https://dev.mysql.com/doc/refman/9.7/en/sys-schema-index-statistics.html
insert_latency The total wait time of timed inserts into the index. The schema_index_statistics and x$schema_index_statistics views have these columns: table_schema The schema that contains the table. select_latency The total wait time of timed ...
https://dev.mysql.com/doc/refman/9.7/en/working-with-null.html
A common error when working with NULL is to assume that it is not possible to insert a zero or an empty string into a column defined as NOT NULL, but this is not the case. The NULL value can be surprising until you get used to it. Conceptually, ...