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Correct constness of system attributes in heap.c & prerequisites.

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This allows the compiler / linker to mark affected pages as read-only.

There's a fair number of pre-requisite changes, to allow the const
properly be propagated. Most of consts were already required for
correctness anyway, just not represented on the type-level.  Arguably
we could be more aggressive in using consts in related code, but..

This requires using a few of the types underlying typedefs that
removes pointers (e.g. const NameData *) as declaring the typedefed
type constant doesn't have the same meaning (it makes the variable
const, not what it points to).

Discussion: https://postgr.es/m/20181015200754.7y7zfuzsoux2c4ya@alap3.anarazel.de
This commit is contained in:
Andres Freund
2018-10-16 09:44:43 -07:00
parent c015ccb306
commit 02a30a09f9
11 changed files with 32 additions and 31 deletions
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2
src/backend/parser/parse_utilcmd.c
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@ -2065,7 +2065,7 @@ transformIndexConstraint(Constraint *constraint, CreateStmtContext *cxt)
for (i = 0; i < index_form->indnatts; i++)
{
int16 attnum = index_form->indkey.values[i];
Form_pg_attribute attform;
const FormData_pg_attribute *attform;
char *attname;
Oid defopclass;