TheBLOB,TEXT,GEOMETRY, andJSONdata types can be assigned a default value only if the value is written as an expression, even if the expression value is a literal: This is permitted (literal default specified as expression): CREATETABLEt2(bBLOBDEFAULT('abc')); ...
For information about all data types in each MySQL version, see theofficial MySQL documentation. The following table provides the support status of main data types in MySQL 8.0.X. Data type MySQL Reader for batch data read MySQL Writer for batch data write ...
Note:Data types might have different names in different database. And even if the name is the same, the size and other details may be different!Always check the documentation! MySQL Data Types (Version 8.0) In MySQL there are three main data types: string, numeric, and date and time. ...
TheBLOB,TEXT,GEOMETRY, andJSONdata types cannot be assigned a default value. Implicit Default Handling If a data type specification includes no explicitDEFAULTvalue, MySQL determines the default value as follows: If the column can takeNULLas a value, the column is defined with an explicitDEFAULT ...
(if you simultaneously passreplace_query = 1andon_duplicate_clause, ClickHouse generates an exception). Example:INSERT INTO t (c1,c2) VALUES ('a', 2) ON DUPLICATE KEY UPDATE c2 = c2 + 1;on_duplicate_clausehere isUPDATE c2 = c2 + 1. See the MySQL documentation to find whichon_...
(See this /// page in the MySQL documentation for details.) /// /// Second, when calling a stored procedure, MySQL can return the /// result as a set of results. /// /// In either case, you must consume all results before making /// another MySQL query, even if you don't ...
It is important to understand that many commands in MySQL can cause an implicit commit, as described in the MySQL documentation Ping A ping packet can be sent over a connection using the connection.ping method. This method will send a ping packet to the server and when the server responds,...
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The "ApsaraDB RDS for MySQL connector" topic will be removed from the Connectors documentation. You can use the MySQL connector to read data from ApsaraDB for OceanBase. When you use the MySQL connector to read data from ApsaraDB for OceanBase, make sure that the binlog service is enabled ...
Importing Data from MongoDB to MySQL: BSON Data Types 1,892 Edwin Desouza 02/08/2019 04:15PM JSON NULL handling 15,473 Philippe Riand 10/29/2018 06:54PM Re: JSON NULL handling 3,397 Doeyull Kim 01/03/2019 02:54AM Re: JSON NULL handling ...