array_dims function is poorly behaved

Simply use an array_dims() on any non-array type, the messages vary from:

SIS=# select array_dims(datdba) from pg_database;
pqReadData() -- backend closed the channel unexpectedly.
         This probably means the backend terminated abnormally
         before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.
!# ;
You are currently not connected to a database.
!# \q

to:

SIS=# select array_dims(datname) from pg_database;
ERROR:  MemoryContextAlloc: invalid request size 1702125936

Reproduces consistently on Linux (i386) 2.4.16 running 7.1.3.

Cheers,

Marc L.

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Marc P. Lavergne [wk:407-648-6996]
Product Development
richLAVA Corporation

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