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Can you index JSON columns MySQL?
As the MySQL manual notes: JSON columns cannot be indexed. You can work around this restriction by creating an index on a generated column that extracts a scalar value from the JSON column.
How do I encrypt a column in MySQL?
When encrypting a column you can use the ENCRYPT function, AES_ ENCRYPT function, the older DES_ENCRYPT function, or the encoding or compression algorithms. If you want to use this approach to encryption and decryption, I would recommend that you use AES_ENCRYPT and AES_DECRYPT.
What type of indexing does MySQL use?
Most MySQL indexes ( PRIMARY KEY , UNIQUE , INDEX , and FULLTEXT ) are stored in B-trees. Exceptions: Indexes on spatial data types use R-trees; MEMORY tables also support hash indexes; InnoDB uses inverted lists for FULLTEXT indexes.
What is index in JSON?
A JSON search index is a general index. It can improve the performance of both (1) ad hoc structural queries, that is, queries that you might not anticipate or use regularly, and (2) full-text search. It is an Oracle Text index that is designed specifically for use with JSON data.
How do I encrypt an entire MySQL database?
To enable encryption for the mysql system tablespace, specify the tablespace name and the ENCRYPTION option in an ALTER TABLESPACE statement. mysql> ALTER TABLESPACE mysql ENCRYPTION = ‘Y’; To disable encryption for the mysql system tablespace, set ENCRYPTION = ‘N’ using an ALTER TABLESPACE statement.
How do I encrypt a table in MySQL?
To encrypt data in an InnoDB file-per-table tablespace, run ALTER TABLE tbl_name ENCRYPTION = ‘Y’ . To encrypt a general tablespace or the mysql tablespace, run ALTER TABLESPACE tablespace_name ENCRYPTION = ‘Y’ . Encryption support for general tablespaces was introduced in MySQL 8.0.
How to encrypt a specific column in a MySQL?
Look here for list of possible encryption functions: You can create trigger for update and check there field accessable. Something like that: You also can update all existing records in you table with this query: So you can select records for you PHP code: UPD. Also here was similar question:
What kind of encryption mode does MySQL use?
It uses Electronic Codebook (ECB) block encryption mode for tablespace key encryption and Cipher Block Chaining (CBC) block encryption mode for data encryption. For frequently asked questions about the data-at-rest encryption feature, see Section A.17, “MySQL 5.7 FAQ: InnoDB Data-at-Rest Encryption” .
Where do I find encryption option in SQL?
When the ENCRYPTION option is specified in a CREATE TABLE or ALTER TABLE statement, it is recorded in the CREATE_OPTIONS column of INFORMATION_SCHEMA.TABLES. This column can be queried to identify tables that reside in encrypted file-per-table tablespaces.
Where is the master encryption key stored in InnoDB?
When a tablespace is encrypted, a tablespace key is encrypted and stored in the tablespace header. When an application or authenticated user wants to access encrypted data, InnoDB uses a master encryption key to decrypt the tablespace key.