Could you please re-install 5.6.7 server and check content of its datadir and mysql directory right after installation, but before doing anything on the server. InnoDB: 2) If the table is not needed, or you can restore it from a backup, InnoDB: then you can remove the .ibd file, and InnoDB will do a normal InnoDB: crash recovery and ignore that table
Full scan on NULL key is still present in the plan but will never actually be executed because it will be short circuited by the previous IS NULL check. Despite the fact that no actual value of id can be returned by such a query, the engine still looks up id in the table (since it's not a part of the index)
See the example in the below section.If you use DELETE statement to delete the last inserted row, MySQL may or may not reuse the deleted sequence number depending on the storage engine of the table. If you insert a new value that is greater than the next sequence number, MySQL will use the new value as the starting sequence number and generate a unique sequence number greater than the current one for the next usage
MySQL CREATE TABLE
We will show you how to define columns in more detail in the next section.Third, you need to specify the storage engine for the table in the engine clause
The table has a composite key.(I could try this myself, but I have no MySQL box to test on for the next few weeks.)Bogdan Says: September 29th, 2008 at 21:55 Marius,neither MySQL documentation, nor my (not so extensive) experience with MySQL raise any support for disabling described functionality for composite keys. Advantage of this method is that it only ignores duplicate key events, and still aborts on other errors.As a final notice: this post was inspired by Xaprb
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MySQL: Insert record if not exists in table - Stack Overflow
What you can do: create a UNIQUE INDEX on the field which should be unique (name), then use either: normal INSERT (and handle the error if the name already exists) INSERT IGNORE (which will fail silently cause a warning (instead of error) if name already exists) INSERT ..
MySQL :: MySQL 5.0 Reference Manual :: 13.1.10 CREATE TABLE Syntax
In that case, the (child table) row containing such a foreign key is permitted to be inserted, and does not match any row in the referenced (parent) table. For each InnoDB table created when this option is turned on, the table data and all associated indexes are stored in a .ibd file located inside the database directory
MySQL :: MySQL 5.1 Reference Manual :: 13.1.17 CREATE TABLE Syntax
In that case, the (child table) row containing such a foreign key is permitted to be inserted, and does not match any row in the referenced (parent) table. For each InnoDB table created when this option is turned on, the table data and all associated indexes are stored in a .ibd file located inside the database directory
Check if a database exist (MySQL) and if not create it in PHP - Stack Overflow
How do you get to be the hero? Why would an author forward my inquiry about a paper to all its other authors? I have loot in my Clan Castle and I want to upgade it. This may be enough to determine in PHP if the database exists - as long as you can guarantee that the PHP MySQL database user will always have access to this database when it exists
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