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Create Sequence Wizard

Sequences may be created with Create Sequence Wizard. Just specify the wizard options according to your needs.

 

The basic principles of Create Object Wizards in SQL Maestro for MySQL are explained in a separate topic. Below you will find a description of wizard steps that are unique for the current object.

 

Name

The field allows you to specify the new sequence name being set on the previous wizard step.

 

Owner

Defines the owner of the new sequence.

 

Comment

The box allows you to set optional text to describe the new sequence.

 

Value

Specify the starting sequence value here. The default starting value is minvalue for ascending sequences and maxvalue for descending ones.

 

Increment by        

Specify which value is added to the current sequence value to create a new value. A positive value will make an ascending sequence, a negative one a descending sequence. The default value is 1.

 

Max Value

Determine the maximum value for the sequence. If this clause is not supplied or NO MAXVALUE is specified, then default values will be used. The defaults are 2^63-1 and -1 for ascending and descending sequences, respectively.

 

Min Value

Determine the minimum value a sequence can generate. If this clause is not supplied or NO MINVALUE is specified, then defaults will be used. The defaults are 1 and -263-1 for ascending and descending sequences, respectively.

 

Cashe size

Specify how many sequence numbers are to be preallocated and stored in memory for faster access. The minimum value is 1 (only one value can be generated at a time, i.e., no cache), and this is also the default.

 

Cycle

The CYCLE option allows the sequence to wrap around when the maxvalue or minvalue has been reached by an ascending or descending sequence respectively. If the limit is reached, the next number generated will be the minvalue or maxvalue, respectively.

 



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