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Make inet/cidr << and <<= operators indexable. From Alex Pilosov <alex@pilosoft.com>.

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This commit is contained in:
Tom Lane
2001-06-17 02:05:20 +00:00
parent 2917f0a5dd
commit 1f1ca182be
6 changed files with 237 additions and 16 deletions
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30
src/backend/utils/adt/network.c
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@@ -3,7 +3,7 @@
* is for IP V4 CIDR notation, but prepared for V6: just
* add the necessary bits where the comments indicate.
*
* $Header: /cvsroot/pgsql/src/backend/utils/adt/network.c,v 1.31 2001/06/13 21:08:59 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/network.c,v 1.32 2001/06/17 02:05:20 tgl Exp $
*
* Jon Postel RIP 16 Oct 1998
*/
@@ -707,3 +707,31 @@ v4addressOK(unsigned long a1, int bits)
return true;
return false;
}
/*
* These functions are used by planner to generate indexscan limits
* for clauses a << b and a <<= b
*/
/* return the minimal value for an IP on a given network */
Datum
network_scan_first(Datum in)
{
return DirectFunctionCall1(network_network, in);
}
/*
* return "last" IP on a given network. It's the broadcast address,
* however, masklen has to be set to 32, since
* 192.168.0.255/24 is considered less than 192.168.0.255/32
*
* NB: this is not IPv6 ready ...
*/
Datum
network_scan_last(Datum in)
{
return DirectFunctionCall2(inet_set_masklen,
DirectFunctionCall1(network_broadcast, in),
Int32GetDatum(32));
}