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Create Operator Wizard
Create Operator Wizard guides you through the process of creating a new schema operator.
The basic principles of Create Object Wizards in PostgreSQL Maestro are explained in a separate topic. Below you will find a description of wizard steps that are unique for the current object.
Owner
Defines the owner of the new operator.
Comment
The box allows you to set optional text to describe the new operator.
Function
Specify the function used to implement this operator.
Left operand type
Set the data type of the operator left operand, if any. This option can be omitted for a left-unary operator.
Right operand type
Set the data type of the operator right operand, if any. This option can be omitted for a right-unary operator.
Commutator
Specify the commutator of the operator.
Negator
Set the negator of the operator.
Restrict Function
Specify the restriction selectivity estimator function for the operator.
Join Function
Define the join selectivity estimator function for the operator.
Left Sort Operator
If the operator can support a merge join, the less-than operator that sorts the left-hand data type of the operator.
Right Sort Operator
If the operator can support a merge join, the less-than operator that sorts the right-hand data type of the operator.
Less Than Operator
If the operator can support a merge join, the less-than operator that compares the input data types of the operator.
Greater Than Operator
If the operator can support a merge join, the greater-than operator that compares the input data types of the operator.
The Supports Hash Joins and Supports Merge Joins checkboxes indicate that this operator can support a hash join and a merge join respectively.
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