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https://dev.mysql.com/blob.html
If strict SQL mode is not enabled and you assign a value to a BLOB or TEXT column that exceeds the column's maximum length, the value is truncated to fit and a warning is generated. Truncation of excess trailing spaces from values to be inserted ...
https://dev.mysql.com/fulltext-search-ngram.html
The built-in MySQL full-text parser uses the white space between words as a delimiter to determine where words begin and end, which is a limitation when working with ideographic languages that do not use word delimiters. To address this limitation, ...As with other built-in server plugins, it is automatically loaded when the server is ...
https://dev.mysql.com/plugin-types.html
The plugin API enables creation of plugins that implement several capabilities: Storage engines Full-text parsers Daemons INFORMATION_SCHEMA tables Semisynchronous replication Auditing Authentication Password validation and strength checking ...The ...
https://dev.mysql.com/fulltext-restrictions.html
Full-text searches are supported for InnoDB and MyISAM tables only. Although FULLTEXT indexes on ucs2 columns cannot be used, you can perform IN BOOLEAN MODE searches on a ucs2 column that has no such index. Therefore, the built-in full-text parser ...The exception is that for Unicode, the utf8 character set can be used, but not the ucs2 character ...
https://dev.mysql.com/fulltext-stopwords.html
The stopword list is loaded and searched for full-text queries using the server character set and collation (the values of the character_set_server and collation_server system variables). False hits or misses might occur for stopword lookups if the ...For example, lookups are case insensitive if the collation is utf8mb4_0900_ai_ci, whereas lookups are case-sensitive if the collation is utf8mb4_0900_as_cs or ...
https://dev.mysql.com/mysql-cluster-programs-ndb-blob-tool.html
It is sometimes useful in diagnosing and repairing corrupted or damaged NDB tables containing BLOB or TEXT columns. In addition, you can optionally follow the table name with the (comma-separated) names of one or more BLOB or TEXT columns from that ... 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 ...
https://dev.mysql.com/glossary.html
atomic In the SQL context, transactions are units of work that either succeed entirely (when committed) or have no effect at all (when rolled back). The values from such a column can be used as lookup keys in various contexts, and because they are ... These terms are commonly used in information about the MySQL database ...
https://dev.mysql.com/fulltext-query-expansion.html
Full-text search supports query expansion (and in particular, its variant “blind query expansion”). This is generally useful when a search phrase is too short, which often means that the user is relying on implied knowledge that the full-text ...For example, a user searching for “database” may really mean that “MySQL”, “Oracle”, “DB2”, and “RDBMS” all are phrases that should match “databases” and should be returned, ...
https://dev.mysql.com/mysql-batch-commands.html
To do so, create a text file text_file that contains the statements you wish to execute. The mysql client typically is used interactively, like this: shell> mysql db_name However, it is also possible to put your SQL statements in a file and then ...
https://dev.mysql.com/myisam-ftdump.html
Example: Suppose that the test database contains a table named mytexttable that has the following definition: CREATE TABLE mytexttable ( id INT NOT NULL, txt TEXT NOT NULL, PRIMARY KEY (id), FULLTEXT (txt) ) ENGINE=MyISAM; The index on id is index 0 ...It reads the MyISAM index file directly, so it must be run on the server host where the table is ...
Document created the 26/06/2006, last modified the 26/10/2018
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