I’m setting up my first mysql cluster, and just wanted some clarification on a few things.In the manual, it says:Online schema changes. It is not possible to make online schema changes such as those accomplished using ALTER TABLE or CREATE INDEX, as the NDB Cluster engine does not ...
In some databases like MySQL, you can even specify where to insert the new column using the FIRST or AFTER clauses, though this is not a standard feature. Altering table to add new column(s) ALTER TABLE mytable ADD column DataType OptionalTableConstraint DEFAULT default_value; Removing ...
⚈ This discussion assumes you can walk through the original table using an explicitPRIMARYorUNIQUEkey. ⚈ Single-column (not 'compound') key is used to walk through the table. ⚈ You have enough disk space to simultaneously hold both the original table and the new table(s). ⚈ Ther...
I'm using mysql version 4.1.11 on a Fedora Core 4 box and I'm having this problem: I have a table1 which references 2 tables (table2 and table3) using foreign keys. (Using InnoDB engine). I'm altering table1 as follows:
By default, OPTIMIZE TABLE doesnotwork for tables created using any other storage engine and returns a result indicating this lack of support. You can make OPTIMIZE TABLE work for other storage engines by starting mysqld with the --skip-new...
Description: Hi team, When altering the table default charset and its columns' charsets from utf8mb3 to utf8mb4 in one statement, as described in this document https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-conversion.html, then it takes a while to complete for a table with ~...
Bug #117341 Cannot drop index '<unknown key name>' when altering table in any way Submitted: 30 Jan 14:16Modified: 31 Jan 13:30 Reporter: Tarvo R Email Updates: Status: Closed Impact on me: None Category: MySQL ServerSeverity: S3 (Non-critical)...
The Indexes tab is only used for the MySQL database, as a replacement for the Unique Constraints tab. The reason is that for MySQL, the CREATE TABLE statement can be used to declare both unique and non-unique indexes. MySQL also does not make a clear distinction between a unique constraint...
sqlite> CREATE TABLE Cars2 AS SELECT * FROM Cars; The above statement creates an identical table to the Cars table using a specific SELECT statement. sqlite> ATTACH DATABASE 'test2.db' AS test2; sqlite> .databases main: /home/janbodnar/tmp/test.db test2: /home/janbodnar/tmp/test2.db ...
I was trying to alter (ALTER TABLE) a MyISAM table on our production system to add several columns. The table is 13 M and some records and about 2.5 GB in size. The platform is W2k3 with MySQL 4.0.20. After well over an hour of processing, the alter query returns: ...