The catalog pg_range stores information about range types. This is in addition to the types' entries in pg_type.
Table 49-38. pg_range Columns
|rngtypid||oid||pg_type.oid||OID of the range type|
|rngsubtype||oid||pg_type.oid||OID of the element type (subtype) of this range type|
|rngcollation||oid||pg_collation.oid||OID of the collation used for range comparisons, or 0 if none|
|rngsubopc||oid||pg_opclass.oid||OID of the subtype's operator class used for range comparisons|
|rngcanonical||regproc||pg_proc.oid||OID of the function to convert a range value into canonical form, or 0 if none|
|rngsubdiff||regproc||pg_proc.oid||OID of the function to return the difference between two element values as double precision, or 0 if none|
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.
Please use this form to add your own comments regarding your experience with particular features of PostgreSQL, clarifications of the documentation, or hints for other users. Please note, this is not a support forum, and your IP address will be logged. If you have a question or need help, please see the faq, try a mailing list, or join us on IRC. Note that submissions containing URLs or other keywords commonly found in 'spam' comments may be silently discarded. Please contact the webmaster if you think this is happening to you in error.
Proceed to the comment form.