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RLS refactoring

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This refactors rewrite/rowsecurity.c to simplify the handling of the
default deny case (reducing the number of places where we check for and
add the default deny policy from three to one) by splitting up the
retrival of the policies from the application of them.

This also allowed us to do away with the policy_id field.  A policy_name
field was added for WithCheckOption policies and is used in error
reporting, when available.

Patch by Dean Rasheed, with various mostly cosmetic changes by me.

Back-patch to 9.5 where RLS was introduced to avoid unnecessary
differences, since we're still in alpha, per discussion with Robert.
This commit is contained in:
Stephen Frost
2015-09-15 15:49:40 -04:00
parent ed301d6dbe
commit 23a4b897f7
13 changed files with 452 additions and 462 deletions
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20
src/backend/executor/execMain.c
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@@ -1815,14 +1815,26 @@ ExecWithCheckOptions(WCOKind kind, ResultRelInfo *resultRelInfo,
break;
case WCO_RLS_INSERT_CHECK:
case WCO_RLS_UPDATE_CHECK:
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
if (wco->polname != NULL)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("new row violates row level security policy \"%s\" for \"%s\"",
wco->polname, wco->relname)));
else
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("new row violates row level security policy for \"%s\"",
wco->relname)));
break;
case WCO_RLS_CONFLICT_CHECK:
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
if (wco->polname != NULL)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("new row violates row level security policy \"%s\" (USING expression) for \"%s\"",
wco->polname, wco->relname)));
else
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("new row violates row level security policy (USING expression) for \"%s\"",
wco->relname)));
break;