52.43. pg_range
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52.43. pg_range #

The catalog pg_range stores information about range types. This is in addition to the types' entries in pg_type.

Table 52.43. pg_range Columns

Tipo y columna

Descripción

rngtypid oid (hace referencia a pg_type.oid)

OID of the range type

rngsubtype oid (hace referencia a pg_type.oid)

OID of the element type (subtype) of this range type

rngmultitypid oid (hace referencia a pg_type.oid)

OID of the multirange type for this range type

rngcollation oid (hace referencia a pg_collation.oid)

OID of the collation used for range comparisons, or zero if none

rngsubopc oid (hace referencia a pg_opclass.oid)

OID of the subtype's operator class used for range comparisons

rngcanonical regproc (hace referencia a pg_proc.oid)

OID of the function to convert a range value into canonical form, or zero if none

rngsubdiff regproc (hace referencia a pg_proc.oid)

OID of the function to return the difference between two element values as double precision, or zero 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.

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