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https://dev.mysql.com/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 ...If you need to specify a database, use the --database (-d) ...
https://dev.mysql.com/blob.html
A BLOB is a binary large object that can hold a variable amount of data. These correspond to the four BLOB types and have the same maximum lengths and storage requirements. If strict SQL mode is not enabled and you assign a value to a BLOB or TEXT ...These differ only in the maximum length of the values they can ...
https://dev.mysql.com/optimize-blob.html
When storing a large blob containing textual data, consider compressing it first. For a table with several columns, to reduce memory requirements for queries that do not use the BLOB column, consider splitting the BLOB column into a separate table ...Do not use this technique when the entire table is compressed by InnoDB or ...
https://dev.mysql.com/mysql-cluster-options-variables.html
This option can be used to set the size (in bytes) for batching of BLOB data reads in NDB Cluster applications. When this batch size is exceeded by the amount of BLOB data to be read within the current transaction, any pending BLOB read operations ... This section provides information about MySQL server options, server and status variables that are specific to NDB ...
https://dev.mysql.com/column-count-limit.html
BLOB and TEXT columns only contribute 9 to 12 bytes toward the row size limit because their contents are stored separately from the rest of the row. The maximum row size for the used table type, not counting BLOBs, is 65535. You have to change some ... MySQL has hard limit of 4096 columns per table, but the effective maximum may be less for a given ...
https://dev.mysql.com/server-error-reference.html
The maximum row size for the used table type, not counting BLOBs, is %ld. You have to change some columns to TEXT or BLOBs Error number: 1119; Symbol: ER_STACK_OVERRUN; SQLSTATE: HY000 Message: Thread stack overrun: Used: %ld of a %ld stack. Error ... The MySQL server writes some error messages to its error log, and sends others to client ...
https://dev.mysql.com/mysql-cluster-limitations-transactions.html
Unique key reads have their locks upgraded automatically by NDB to ensure a self-consistent read; BLOB reads also employ extra locking for consistency. NDBCLUSTER stores only part of a column value that uses any of MySQL's BLOB or TEXT data types in ... A number of limitations exist in NDB Cluster with regard to the handling of ...
https://dev.mysql.com/string-type-overview.html
Specifying the CHARACTER SET binary attribute for a character string data type causes the column to be created as the corresponding binary string data type: CHAR becomes BINARY, VARCHAR becomes VARBINARY, and TEXT becomes BLOB. TINYBLOB A BLOB ...
https://dev.mysql.com/create-table.html
Prior to MySQL 8.0.13, DEFAULT does not apply to the BLOB, TEXT, GEOMETRY, and JSON types. BLOB and TEXT columns also can be indexed, but a prefix length must be given. That is, index entries consist of the first length characters of each column ...
https://dev.mysql.com/innodb-compression-internals.html
The compression of B-tree nodes (of both clustered and secondary indexes) is handled differently from compression of overflow pages used to store long VARCHAR, BLOB, or TEXT columns, as explained in the following sections. Compressing BLOB, VARCHAR, ... This section describes some internal implementation details about compression for InnoDB ...
Document created the 26/06/2006, last modified the 26/10/2018
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