Error code for "no partition or relation found for row"

Hi,

What is the error code for capturing "no partition or relation found
for row" errors on PL/pgSQL? I feel there should be a specific error
code for that, but I can't find it in the documentation.

In the past, with function partitioning schemes, I used
"undefined_table" exceptions, but it doesn't work with new Postgres 11
partitioning.

Judging by the executor code in execPartition.c, the error code seems
to be ERRCODE_CHECK_VIOLATION, but listening for "check_violation" on
EXCEPTION blocks doesn't work.

Even if it worked, though, wouldn't it collide with other CHECK
constraint violations? I'm writing a function to create partitions
automatically on insert, and this mixed behavior could trigger an
unwanted "CREATE TABLE ... PARTITION OF ..."

Thanks!
Nunks

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