Bring pg_nextoid()'s error messages into line with message style guide.

Noticed while reviewing nearby code.  Given all the disclaimers about
this not being meant as user-facing code, I wonder whether we should
make these non-translatable?  But in any case there's little excuse
for them not to be good English.

diff --git a/src/backend/catalog/catalog.c b/src/backend/catalog/catalog.c
index c39da41d2ecbc7d2d5c51c998e53de9ec0dc27aa..6d8c746057234c5825b581e3c261b0751fb219e6 100644 (file)
--- a/src/backend/catalog/catalog.c
+++ b/src/backend/catalog/catalog.c
@@ -479,7 +479,7 @@ pg_nextoid(PG_FUNCTION_ARGS)
    if (!superuser())
        ereport(ERROR,
                (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                errmsg("must be superuser to call pg_nextoid")));
+                errmsg("must be superuser to call pg_nextoid()")));
 
    rel = table_open(reloid, RowExclusiveLock);
    idx = index_open(idxoid, RowExclusiveLock);
@@ -487,21 +487,21 @@ pg_nextoid(PG_FUNCTION_ARGS)
    if (!IsSystemRelation(rel))
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
-                errmsg("pg_nextoid() can only be used on system relation")));
+                errmsg("pg_nextoid() can only be used on system catalogs")));
 
    if (idx->rd_index->indrelid != RelationGetRelid(rel))
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
-                errmsg("index %s does not belong to table %s",
+                errmsg("index \"%s\" does not belong to table \"%s\"",
                        RelationGetRelationName(idx),
                        RelationGetRelationName(rel))));
 
    atttuple = SearchSysCacheAttName(reloid, NameStr(*attname));
    if (!HeapTupleIsValid(atttuple))
        ereport(ERROR,
-               (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
-                errmsg("attribute %s does not exists",
-                       NameStr(*attname))));
+               (errcode(ERRCODE_UNDEFINED_COLUMN),
+                errmsg("column \"%s\" of relation \"%s\" does not exist",
+                       NameStr(*attname), RelationGetRelationName(rel))));
 
    attform = ((Form_pg_attribute) GETSTRUCT(atttuple));
    attno = attform->attnum;
@@ -509,14 +509,14 @@ pg_nextoid(PG_FUNCTION_ARGS)
    if (attform->atttypid != OIDOID)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
-                errmsg("attribute %s is not of type oid",
+                errmsg("column \"%s\" is not of type oid",
                        NameStr(*attname))));
 
    if (IndexRelationGetNumberOfKeyAttributes(idx) != 1 ||
        idx->rd_index->indkey.values[0] != attno)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
-                errmsg("index %s is not the index for attribute %s",
+                errmsg("index \"%s\" is not the index for column \"%s\"",
                        RelationGetRelationName(idx),
                        NameStr(*attname))));