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authorTom Lane <tgl@sss.pgh.pa.us>2010-11-24 14:20:39 -0500
committerTom Lane <tgl@sss.pgh.pa.us>2010-11-24 14:22:17 -0500
commit725d52d0c27cffe8c99bb78e2b0d2480d5cd702b (patch)
tree23aae31466c0f7e0e65762946b0012d30e92ab4d /src/backend/commands/dbcommands.c
parent4fc09ad00c3cc95003a5523d85999da1dd4f9d75 (diff)
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Create the system catalog infrastructure needed for KNNGIST.
This commit adds columns amoppurpose and amopsortfamily to pg_amop, and column amcanorderbyop to pg_am. For the moment all the entries in amcanorderbyop are "false", since the underlying support isn't there yet. Also, extend the CREATE OPERATOR CLASS/ALTER OPERATOR FAMILY commands with [ FOR SEARCH | FOR ORDER BY sort_operator_family ] clauses to allow the new columns of pg_amop to be populated, and create pg_dump support for dumping that information. I also added some documentation, although it's perhaps a bit premature given that the feature doesn't do anything useful yet. Teodor Sigaev, Robert Haas, Tom Lane
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