Attached patch adds <@, @>, <<@, and @>> operator symbols for inet
datatype to replace <<=, >>=, <<, and >>.  <@ and @> symbols are used
for containment for all datatypes except inet, particularly on the
geometric types, arrays; cube, hstore, intaray, ltree extensions.

<@ and @> symbols are standardised as on version 8.2 by Tom Lane at
2006 [1].  The previous symbols are left in-place but deprecated.  The
patch does exactly the same for inet datatypes.

The << and >> are standard symbols for strictly left of and strictly
right of operators.  Those operators would also make sense for inet
datatypes.  If we make this change now; we can remove the symbols, and
reuse them for new operators in distant future.

The patch removes the recently committed SP-GiST index support for the
existing operator symbols to give move reason to the users to use the
new symbols.  This change will also indirectly deprecate the
undocumented non-transparent btree index support that works sometimes
for some of the existing operators [2].

The patch includes changes on the regression tests and the
documentation.  I will add it to 2016-11 Commitfest.


Attachment: 0001-inet-contain-op-v1.patch
Description: Binary data

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