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Add relkind checks to certain contrib modules

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The contrib extensions pageinspect, pg_visibility and pgstattuple only
work against regular relations which have storage.  They don't work
against foreign tables, partitioned (parent) tables, views, et al.

Add checks to the user-callable functions to return a useful error
message to the user if they mistakenly pass an invalid relation to a
function which doesn't accept that kind of relation.

In passing, improve some of the existing checks to use ereport() instead
of elog(), add a function to consolidate common checks where
appropriate, and add some regression tests.

Author: Amit Langote, with various changes by me
Reviewed by: Michael Paquier and Corey Huinker
Discussion: https://postgr.es/m/ab91fd9d-4751-ee77-c87b-4dd704c1e59c@lab.ntt.co.jp
This commit is contained in:
Stephen Frost
2017-03-09 16:34:25 -05:00
parent b54aad8e34
commit c08d82f38e
12 changed files with 517 additions and 21 deletions
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3
contrib/pgstattuple/pgstattuple.c
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@ -293,6 +293,9 @@ pgstat_relation(Relation rel, FunctionCallInfo fcinfo)
case RELKIND_FOREIGN_TABLE:
err = "foreign table";
break;
case RELKIND_PARTITIONED_TABLE:
err = "partitioned table";
break;
default:
err = "unknown";
break;