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https://dev.mysql.com/myisampack.html
end-space The number of columns that have a lot of trailing spaces. In this case, each value contains a count for the number of trailing spaces. When the table is used later, the server reads into memory the information needed to decompress columns.
https://dev.mysql.com/string-type-overview.html
Note Trailing spaces are removed when CHAR values are retrieved unless the PAD_CHAR_TO_FULL_LENGTH SQL mode is enabled. Note MySQL follows the standard SQL specification, and does not remove trailing spaces from VARCHAR values. For additional ...
https://dev.mysql.com/func-op-summary-ref.html
GTID_SUBTRACT() Return all GTIDs in set that are not in subset. JSON_CONTAINS() Whether JSON document contains specific object at path JSON_CONTAINS_PATH() Whether JSON document contains any data at path JSON_DEPTH() Maximum depth of JSON document ...
https://dev.mysql.com/blob.html
Truncation of excess trailing spaces from values to be inserted into TEXT columns always generates a warning, regardless of the SQL mode. This means that, if the index requires unique values, duplicate-key errors will occur for values that differ ...
https://dev.mysql.com/cast-functions.html
The BINARY operator also causes trailing spaces in comparisons to be significant. Unlike CHAR, NCHAR does not permit trailing character set information to be specified. Table 12.14 Cast Functions and Operators Name Description BINARY Cast a string ...
https://dev.mysql.com/sql-mode.html
PAD_CHAR_TO_FULL_LENGTH By default, trailing spaces are trimmed from CHAR column values on retrieval. This mode does not apply to VARCHAR columns, for which trailing spaces are retained on retrieval. The MySQL server can operate in different SQL ...
https://dev.mysql.com/charset-conversion.html
To remove these bytes, use the TRIM() function: UPDATE t SET col1 = TRIM(TRAILING 0x00 FROM col1); Suppose that table t has a nonbinary column named col1 defined as CHAR(50) CHARACTER SET latin1 but you want to convert it to use utf8 so that you can ... To convert a binary or nonbinary string column to use a particular character set, use ALTER ...
https://dev.mysql.com/innodb-init-startup-configuration.html
For example, to create two files named ibdata1 and ibdata2 in a directory named myibdata, configure InnoDB like this: [mysqld] innodb_data_home_dir = /path/to/myibdata/ innodb_data_file_path=ibdata1:50M;ibdata2:50M:autoextend Note A trailing slash ... The first decisions to make about InnoDB configuration involve the configuration of data files, log files, page size, and memory ...
https://dev.mysql.com/myisamlog.html
To create such a file, start the server with a --log-isam=log_file option. Invoke myisamlog like this: shell> myisamlog [options] [file_name [tbl_name] ...] The default operation is update (-u). If a recovery is done (-r), all writes and possibly ...
https://dev.mysql.com/server-error-reference.html
Error number: MY-010503; Symbol: ER_NDB_TRAILING_SHARE_RELEASED_BY_CLOSE_CACHED_TABLES; SQLSTATE: HY000 Message: NDB_SHARE: trailing share %s, released by close_cached_tables ER_NDB_TRAILING_SHARE_RELEASED_BY_CLOSE_CACHED_TABLES was added in 8.0.2, ... The MySQL server writes some error messages to its error log, and sends others to client ...
Document created the 26/06/2006, last modified the 26/10/2018
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