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Grammar object type refactoring

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Unify the grammar of COMMENT, DROP, and SECURITY LABEL further.  They
all effectively just take an object address for later processing, so
we can make the grammar more generalized.  Some extra checking about
which object types are supported can be done later in the statement
execution.

Discussion: https://www.postgresql.org/message-id/flat/163c00a5-f634-ca52-fc7c-0e53deda8735%402ndquadrant.com
This commit is contained in:
Peter Eisentraut
2020-06-13 09:03:28 +02:00
parent e78900afd2
commit a332b366d4
2 changed files with 122 additions and 114 deletions
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162
src/backend/parser/gram.y
View File

@ -463,9 +463,8 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
%type <boolean> copy_from opt_program
%type <ival> opt_column event cursor_options opt_hold opt_set_data
%type <objtype> drop_type_any_name drop_type_name drop_type_name_on_any_name
comment_type_any_name comment_type_name
security_label_type_any_name security_label_type_name
%type <objtype> object_type_any_name object_type_name object_type_name_on_any_name
drop_type_name
%type <node> fetch_args select_limit_value
offset_clause select_offset_value
@ -6190,7 +6189,7 @@ ReassignOwnedStmt:
*
*****************************************************************************/
DropStmt: DROP drop_type_any_name IF_P EXISTS any_name_list opt_drop_behavior
DropStmt: DROP object_type_any_name IF_P EXISTS any_name_list opt_drop_behavior
{
DropStmt *n = makeNode(DropStmt);
n->removeType = $2;
@ -6200,7 +6199,7 @@ DropStmt: DROP drop_type_any_name IF_P EXISTS any_name_list opt_drop_behavior
n->concurrent = false;
$$ = (Node *)n;
}
| DROP drop_type_any_name any_name_list opt_drop_behavior
| DROP object_type_any_name any_name_list opt_drop_behavior
{
DropStmt *n = makeNode(DropStmt);
n->removeType = $2;
@ -6230,7 +6229,7 @@ DropStmt: DROP drop_type_any_name IF_P EXISTS any_name_list opt_drop_behavior
n->concurrent = false;
$$ = (Node *)n;
}
| DROP drop_type_name_on_any_name name ON any_name opt_drop_behavior
| DROP object_type_name_on_any_name name ON any_name opt_drop_behavior
{
DropStmt *n = makeNode(DropStmt);
n->removeType = $2;
@ -6240,7 +6239,7 @@ DropStmt: DROP drop_type_any_name IF_P EXISTS any_name_list opt_drop_behavior
n->concurrent = false;
$$ = (Node *) n;
}
| DROP drop_type_name_on_any_name IF_P EXISTS name ON any_name opt_drop_behavior
| DROP object_type_name_on_any_name IF_P EXISTS name ON any_name opt_drop_behavior
{
DropStmt *n = makeNode(DropStmt);
n->removeType = $2;
@ -6312,8 +6311,8 @@ DropStmt: DROP drop_type_any_name IF_P EXISTS any_name_list opt_drop_behavior
}
;
/* object types taking any_name_list */
drop_type_any_name:
/* object types taking any_name/any_name_list */
object_type_any_name:
TABLE { $$ = OBJECT_TABLE; }
| SEQUENCE { $$ = OBJECT_SEQUENCE; }
| VIEW { $$ = OBJECT_VIEW; }
@ -6329,7 +6328,20 @@ drop_type_any_name:
| TEXT_P SEARCH CONFIGURATION { $$ = OBJECT_TSCONFIGURATION; }
;
/* object types taking name_list */
/*
* object types taking name/name_list
*
* DROP handles some of them separately
*/
object_type_name:
drop_type_name { $$ = $1; }
| DATABASE { $$ = OBJECT_DATABASE; }
| ROLE { $$ = OBJECT_ROLE; }
| SUBSCRIPTION { $$ = OBJECT_SUBSCRIPTION; }
| TABLESPACE { $$ = OBJECT_TABLESPACE; }
;
drop_type_name:
ACCESS METHOD { $$ = OBJECT_ACCESS_METHOD; }
| EVENT TRIGGER { $$ = OBJECT_EVENT_TRIGGER; }
@ -6342,7 +6354,7 @@ drop_type_name:
;
/* object types attached to a table */
drop_type_name_on_any_name:
object_type_name_on_any_name:
POLICY { $$ = OBJECT_POLICY; }
| RULE { $$ = OBJECT_RULE; }
| TRIGGER { $$ = OBJECT_TRIGGER; }
@ -6394,36 +6406,12 @@ opt_restart_seqs:
/*****************************************************************************
*
* The COMMENT ON statement can take different forms based upon the type of
* the object associated with the comment. The form of the statement is:
*
* COMMENT ON [ [ ACCESS METHOD | CONVERSION | COLLATION |
* DATABASE | DOMAIN |
* EXTENSION | EVENT TRIGGER | FOREIGN DATA WRAPPER |
* FOREIGN TABLE | INDEX | [PROCEDURAL] LANGUAGE |
* MATERIALIZED VIEW | POLICY | ROLE | SCHEMA | SEQUENCE |
* SERVER | STATISTICS | TABLE | TABLESPACE |
* TEXT SEARCH CONFIGURATION | TEXT SEARCH DICTIONARY |
* TEXT SEARCH PARSER | TEXT SEARCH TEMPLATE | TYPE |
* VIEW] <objname> |
* AGGREGATE <aggname> (arg1, ...) |
* CAST (<src type> AS <dst type>) |
* COLUMN <relname>.<colname> |
* CONSTRAINT <constraintname> ON <relname> |
* CONSTRAINT <constraintname> ON DOMAIN <domainname> |
* FUNCTION <funcname> (arg1, arg2, ...) |
* LARGE OBJECT <oid> |
* OPERATOR <op> (leftoperand_typ, rightoperand_typ) |
* OPERATOR CLASS <name> USING <access-method> |
* OPERATOR FAMILY <name> USING <access-method> |
* RULE <rulename> ON <relname> |
* TRIGGER <triggername> ON <relname> ]
* IS { 'text' | NULL }
* COMMENT ON <object> IS <text>
*
*****************************************************************************/
CommentStmt:
COMMENT ON comment_type_any_name any_name IS comment_text
COMMENT ON object_type_any_name any_name IS comment_text
{
CommentStmt *n = makeNode(CommentStmt);
n->objtype = $3;
@ -6431,7 +6419,15 @@ CommentStmt:
n->comment = $6;
$$ = (Node *) n;
}
| COMMENT ON comment_type_name name IS comment_text
| COMMENT ON COLUMN any_name IS comment_text
{
CommentStmt *n = makeNode(CommentStmt);
n->objtype = OBJECT_COLUMN;
n->object = (Node *) $4;
n->comment = $6;
$$ = (Node *) n;
}
| COMMENT ON object_type_name name IS comment_text
{
CommentStmt *n = makeNode(CommentStmt);
n->objtype = $3;
@ -6500,10 +6496,10 @@ CommentStmt:
n->comment = $9;
$$ = (Node *) n;
}
| COMMENT ON POLICY name ON any_name IS comment_text
| COMMENT ON object_type_name_on_any_name name ON any_name IS comment_text
{
CommentStmt *n = makeNode(CommentStmt);
n->objtype = OBJECT_POLICY;
n->objtype = $3;
n->object = (Node *) lappend($6, makeString($4));
n->comment = $8;
$$ = (Node *) n;
@ -6524,14 +6520,6 @@ CommentStmt:
n->comment = $6;
$$ = (Node *) n;
}
| COMMENT ON RULE name ON any_name IS comment_text
{
CommentStmt *n = makeNode(CommentStmt);
n->objtype = OBJECT_RULE;
n->object = (Node *) lappend($6, makeString($4));
n->comment = $8;
$$ = (Node *) n;
}
| COMMENT ON TRANSFORM FOR Typename LANGUAGE name IS comment_text
{
CommentStmt *n = makeNode(CommentStmt);
@ -6540,14 +6528,6 @@ CommentStmt:
n->comment = $9;
$$ = (Node *) n;
}
| COMMENT ON TRIGGER name ON any_name IS comment_text
{
CommentStmt *n = makeNode(CommentStmt);
n->objtype = OBJECT_TRIGGER;
n->object = (Node *) lappend($6, makeString($4));
n->comment = $8;
$$ = (Node *) n;
}
| COMMENT ON OPERATOR CLASS any_name USING name IS comment_text
{
CommentStmt *n = makeNode(CommentStmt);
@ -6582,40 +6562,6 @@ CommentStmt:
}
;
/* object types taking any_name */
comment_type_any_name:
COLUMN { $$ = OBJECT_COLUMN; }
| INDEX { $$ = OBJECT_INDEX; }
| SEQUENCE { $$ = OBJECT_SEQUENCE; }
| STATISTICS { $$ = OBJECT_STATISTIC_EXT; }
| TABLE { $$ = OBJECT_TABLE; }
| VIEW { $$ = OBJECT_VIEW; }
| MATERIALIZED VIEW { $$ = OBJECT_MATVIEW; }
| COLLATION { $$ = OBJECT_COLLATION; }
| CONVERSION_P { $$ = OBJECT_CONVERSION; }
| FOREIGN TABLE { $$ = OBJECT_FOREIGN_TABLE; }
| TEXT_P SEARCH CONFIGURATION { $$ = OBJECT_TSCONFIGURATION; }
| TEXT_P SEARCH DICTIONARY { $$ = OBJECT_TSDICTIONARY; }
| TEXT_P SEARCH PARSER { $$ = OBJECT_TSPARSER; }
| TEXT_P SEARCH TEMPLATE { $$ = OBJECT_TSTEMPLATE; }
;
/* object types taking name */
comment_type_name:
ACCESS METHOD { $$ = OBJECT_ACCESS_METHOD; }
| DATABASE { $$ = OBJECT_DATABASE; }
| EVENT TRIGGER { $$ = OBJECT_EVENT_TRIGGER; }
| EXTENSION { $$ = OBJECT_EXTENSION; }
| FOREIGN DATA_P WRAPPER { $$ = OBJECT_FDW; }
| opt_procedural LANGUAGE { $$ = OBJECT_LANGUAGE; }
| PUBLICATION { $$ = OBJECT_PUBLICATION; }
| ROLE { $$ = OBJECT_ROLE; }
| SCHEMA { $$ = OBJECT_SCHEMA; }
| SERVER { $$ = OBJECT_FOREIGN_SERVER; }
| SUBSCRIPTION { $$ = OBJECT_SUBSCRIPTION; }
| TABLESPACE { $$ = OBJECT_TABLESPACE; }
;
comment_text:
Sconst { $$ = $1; }
| NULL_P { $$ = NULL; }
@ -6632,7 +6578,7 @@ comment_text:
*****************************************************************************/
SecLabelStmt:
SECURITY LABEL opt_provider ON security_label_type_any_name any_name
SECURITY LABEL opt_provider ON object_type_any_name any_name
IS security_label
{
SecLabelStmt *n = makeNode(SecLabelStmt);
@ -6642,7 +6588,17 @@ SecLabelStmt:
n->label = $8;
$$ = (Node *) n;
}
| SECURITY LABEL opt_provider ON security_label_type_name name
| SECURITY LABEL opt_provider ON COLUMN any_name
IS security_label
{
SecLabelStmt *n = makeNode(SecLabelStmt);
n->provider = $3;
n->objtype = OBJECT_COLUMN;
n->object = (Node *) $6;
n->label = $8;
$$ = (Node *) n;
}
| SECURITY LABEL opt_provider ON object_type_name name
IS security_label
{
SecLabelStmt *n = makeNode(SecLabelStmt);
@ -6728,28 +6684,6 @@ opt_provider: FOR NonReservedWord_or_Sconst { $$ = $2; }
| /* empty */ { $$ = NULL; }
;
/* object types taking any_name */
security_label_type_any_name:
COLUMN { $$ = OBJECT_COLUMN; }
| FOREIGN TABLE { $$ = OBJECT_FOREIGN_TABLE; }
| SEQUENCE { $$ = OBJECT_SEQUENCE; }
| TABLE { $$ = OBJECT_TABLE; }
| VIEW { $$ = OBJECT_VIEW; }
| MATERIALIZED VIEW { $$ = OBJECT_MATVIEW; }
;
/* object types taking name */
security_label_type_name:
DATABASE { $$ = OBJECT_DATABASE; }
| EVENT TRIGGER { $$ = OBJECT_EVENT_TRIGGER; }
| opt_procedural LANGUAGE { $$ = OBJECT_LANGUAGE; }
| PUBLICATION { $$ = OBJECT_PUBLICATION; }
| ROLE { $$ = OBJECT_ROLE; }
| SCHEMA { $$ = OBJECT_SCHEMA; }
| SUBSCRIPTION { $$ = OBJECT_SUBSCRIPTION; }
| TABLESPACE { $$ = OBJECT_TABLESPACE; }
;
security_label: Sconst { $$ = $1; }
| NULL_P { $$ = NULL; }
;