53.43. pg_range
The catalog
pg_range
stores information about
range types. This is in addition to the types' entries in
pg_type
.
Table 53.43.
pg_range
Columns
Column Type Description |
---|
OID of the range type |
OID of the element type (subtype) of this range type |
OID of the multirange type for this range type |
OID of the collation used for range comparisons, or zero if none |
OID of the subtype's operator class used for range comparisons |
OID of the function to convert a range value into canonical form, or zero if none |
OID of the function to return the difference between two element
values as
|
rngsubopc
(plus
rngcollation
, if the
element type is collatable) determines the sort ordering used by the range
type.
rngcanonical
is used when the element type is
discrete.
rngsubdiff
is optional but should be supplied to
improve performance of GiST indexes on the range type.