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Add a new DestReceiver for printing tuples without catalog access.

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If you create a DestReciver of type DestRemote and try to use it from
a replication connection that is not bound to a specific daabase, or
any other hypothetical type of backend that is not bound to a specific
database, it will fail because it doesn't have a pg_proc catalog to
look up properties of the types being printed.  In general, that's
an unavoidable problem, but we can hardwire the properties of a few
builtin types in order to support utility commands.  This new
DestReceiver of type DestRemoteSimple does just that.

Patch by me, reviewed by Michael Paquier.

Discussion: http://postgr.es/m/CA+TgmobNo4qz06wHEmy9DszAre3dYx-WNhHSCbU9SAwf+9Ft6g@mail.gmail.com
This commit is contained in:
Robert Haas
2017-01-24 16:53:56 -05:00
parent 7b4ac19982
commit a84069d935
5 changed files with 148 additions and 2 deletions
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src/include/tcop/dest.h
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@@ -89,6 +89,7 @@ typedef enum
DestDebug, /* results go to debugging output */
DestRemote, /* results sent to frontend process */
DestRemoteExecute, /* sent to frontend, in Execute command */
DestRemoteSimple, /* sent to frontend, w/no catalog access */
DestSPI, /* results sent to SPI manager */
DestTuplestore, /* results sent to Tuplestore */
DestIntoRel, /* results sent to relation (SELECT INTO) */