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Accept SET SESSION AUTHORIZATION DEFAULT and RESET SESSION AUTHORIZATION

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to reset session userid to the originally-authenticated name.  Also,
relax SET SESSION AUTHORIZATION to allow specifying one's own username
even if one is not superuser, so as to avoid unnecessary error messages
when loading a pg_dump file that uses this command.  Per discussion from
several months ago.
This commit is contained in:
Tom Lane
2002-05-06 19:47:30 +00:00
parent 15162aef24
commit 2822788993
4 changed files with 88 additions and 27 deletions
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29
src/backend/parser/gram.y
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@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.312 2002/05/03 00:32:16 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.313 2002/05/06 19:47:30 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -281,7 +281,7 @@ static void doNegateFloat(Value *v);
%type <ival> Iconst
%type <str> Sconst, comment_text
%type <str> UserId, opt_boolean, ColId_or_Sconst
%type <list> var_list
%type <list> var_list, var_list_or_default
%type <str> ColId, ColLabel, type_name
%type <node> var_value, zone_value
@@ -833,14 +833,14 @@ schema_stmt: CreateStmt
*
*****************************************************************************/
VariableSetStmt: SET ColId TO var_list
VariableSetStmt: SET ColId TO var_list_or_default
{
VariableSetStmt *n = makeNode(VariableSetStmt);
n->name = $2;
n->args = $4;
$$ = (Node *) n;
}
| SET ColId '=' var_list
| SET ColId '=' var_list_or_default
{
VariableSetStmt *n = makeNode(VariableSetStmt);
n->name = $2;
@@ -884,14 +884,25 @@ VariableSetStmt: SET ColId TO var_list
n->args = makeList1(makeStringConst($4, NULL));
$$ = (Node *) n;
}
| SET SESSION AUTHORIZATION DEFAULT
{
VariableSetStmt *n = makeNode(VariableSetStmt);
n->name = "session_authorization";
n->args = NIL;
$$ = (Node *) n;
}
;
var_list_or_default: var_list
{ $$ = $1; }
| DEFAULT
{ $$ = NIL; }
;
var_list: var_value
{ $$ = makeList1($1); }
| var_list ',' var_value
{ $$ = lappend($1, $3); }
| DEFAULT
{ $$ = NIL; }
;
var_value: opt_boolean
@@ -1017,6 +1028,12 @@ VariableResetStmt: RESET ColId
n->name = "XactIsoLevel";
$$ = (Node *) n;
}
| RESET SESSION AUTHORIZATION
{
VariableResetStmt *n = makeNode(VariableResetStmt);
n->name = "session_authorization";
$$ = (Node *) n;
}
| RESET ALL
{
VariableResetStmt *n = makeNode(VariableResetStmt);