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Commit8f0530f

Browse files
committed
Improve castNode notation by introducing list-extraction-specific variants.
This extends the castNode() notation introduced by commit5bcab11 toprovide, in one step, extraction of a list cell's pointer and coercion toa concrete node type. For example, "lfirst_node(Foo, lc)" is the sameas "castNode(Foo, lfirst(lc))". Almost half of the uses of castNodethat have appeared so far include a list extraction call, so this ispretty widely useful, and it saves a few more keystrokes compared to theold way.As with the previous patch, back-patch the addition of these macros topg_list.h, so that the notation will be available when back-patching.Patch by me, after an idea of Andrew Gierth's.Discussion:https://postgr.es/m/14197.1491841216@sss.pgh.pa.us
1 parent56dd8e8 commit8f0530f

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65 files changed

+176
-168
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65 files changed

+176
-168
lines changed

‎contrib/pg_stat_statements/pg_stat_statements.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2393,7 +2393,7 @@ JumbleRangeTable(pgssJumbleState *jstate, List *rtable)
23932393

23942394
foreach(lc,rtable)
23952395
{
2396-
RangeTblEntry*rte=castNode(RangeTblEntry,lfirst(lc));
2396+
RangeTblEntry*rte=lfirst_node(RangeTblEntry,lc);
23972397

23982398
APP_JUMB(rte->rtekind);
23992399
switch (rte->rtekind)
@@ -2656,7 +2656,7 @@ JumbleExpr(pgssJumbleState *jstate, Node *node)
26562656
JumbleExpr(jstate, (Node*)caseexpr->arg);
26572657
foreach(temp,caseexpr->args)
26582658
{
2659-
CaseWhen*when=castNode(CaseWhen,lfirst(temp));
2659+
CaseWhen*when=lfirst_node(CaseWhen,temp);
26602660

26612661
JumbleExpr(jstate, (Node*)when->expr);
26622662
JumbleExpr(jstate, (Node*)when->result);

‎contrib/postgres_fdw/deparse.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1350,7 +1350,7 @@ deparseExplicitTargetList(List *tlist, List **retrieved_attrs,
13501350

13511351
foreach(lc,tlist)
13521352
{
1353-
TargetEntry*tle=castNode(TargetEntry,lfirst(lc));
1353+
TargetEntry*tle=lfirst_node(TargetEntry,lc);
13541354

13551355
if (i>0)
13561356
appendStringInfoString(buf,", ");

‎contrib/postgres_fdw/postgres_fdw.c

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1169,7 +1169,7 @@ postgresGetForeignPlan(PlannerInfo *root,
11691169
*/
11701170
foreach(lc,scan_clauses)
11711171
{
1172-
RestrictInfo*rinfo=castNode(RestrictInfo,lfirst(lc));
1172+
RestrictInfo*rinfo=lfirst_node(RestrictInfo,lc);
11731173

11741174
/* Ignore any pseudoconstants, they're dealt with elsewhere */
11751175
if (rinfo->pseudoconstant)
@@ -5022,8 +5022,8 @@ conversion_error_callback(void *arg)
50225022
EState*estate=fsstate->ss.ps.state;
50235023
TargetEntry*tle;
50245024

5025-
tle=castNode(TargetEntry,list_nth(fsplan->fdw_scan_tlist,
5026-
errpos->cur_attno-1));
5025+
tle=list_nth_node(TargetEntry,fsplan->fdw_scan_tlist,
5026+
errpos->cur_attno-1);
50275027

50285028
/*
50295029
* Target list can have Vars and expressions. For Vars, we can get

‎src/backend/catalog/objectaddress.c

Lines changed: 8 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -854,7 +854,7 @@ get_object_address(ObjectType objtype, Node *object,
854854

855855
objlist=castNode(List,object);
856856
domaddr=get_object_address_type(OBJECT_DOMAIN,
857-
castNode(TypeName,linitial(objlist)),
857+
linitial_node(TypeName,objlist),
858858
missing_ok);
859859
constrname=strVal(lsecond(objlist));
860860

@@ -932,8 +932,8 @@ get_object_address(ObjectType objtype, Node *object,
932932
break;
933933
caseOBJECT_CAST:
934934
{
935-
TypeName*sourcetype=castNode(TypeName,linitial(castNode(List,object)));
936-
TypeName*targettype=castNode(TypeName,lsecond(castNode(List,object)));
935+
TypeName*sourcetype=linitial_node(TypeName,castNode(List,object));
936+
TypeName*targettype=lsecond_node(TypeName,castNode(List,object));
937937
Oidsourcetypeid;
938938
Oidtargettypeid;
939939

@@ -947,7 +947,7 @@ get_object_address(ObjectType objtype, Node *object,
947947
break;
948948
caseOBJECT_TRANSFORM:
949949
{
950-
TypeName*typename=castNode(TypeName,linitial(castNode(List,object)));
950+
TypeName*typename=linitial_node(TypeName,castNode(List,object));
951951
char*langname=strVal(lsecond(castNode(List,object)));
952952
Oidtype_id=LookupTypeNameOid(NULL,typename,missing_ok);
953953
Oidlang_id=get_language_oid(langname,missing_ok);
@@ -1597,7 +1597,7 @@ get_object_address_opf_member(ObjectType objtype,
15971597
{
15981598
ObjectAddresstypaddr;
15991599

1600-
typenames[i]=castNode(TypeName,lfirst(cell));
1600+
typenames[i]=lfirst_node(TypeName,cell);
16011601
typaddr=get_object_address_type(OBJECT_TYPE,typenames[i],missing_ok);
16021602
typeoids[i]=typaddr.objectId;
16031603
if (++i >=2)
@@ -2319,8 +2319,8 @@ check_object_ownership(Oid roleid, ObjectType objtype, ObjectAddress address,
23192319
caseOBJECT_CAST:
23202320
{
23212321
/* We can only check permissions on the source/target types */
2322-
TypeName*sourcetype=castNode(TypeName,linitial(castNode(List,object)));
2323-
TypeName*targettype=castNode(TypeName,lsecond(castNode(List,object)));
2322+
TypeName*sourcetype=linitial_node(TypeName,castNode(List,object));
2323+
TypeName*targettype=lsecond_node(TypeName,castNode(List,object));
23242324
Oidsourcetypeid=typenameTypeId(NULL,sourcetype);
23252325
Oidtargettypeid=typenameTypeId(NULL,targettype);
23262326

@@ -2345,7 +2345,7 @@ check_object_ownership(Oid roleid, ObjectType objtype, ObjectAddress address,
23452345
break;
23462346
caseOBJECT_TRANSFORM:
23472347
{
2348-
TypeName*typename=castNode(TypeName,linitial(castNode(List,object)));
2348+
TypeName*typename=linitial_node(TypeName,castNode(List,object));
23492349
Oidtypeid=typenameTypeId(NULL,typename);
23502350

23512351
if (!pg_type_ownercheck(typeid,roleid))

‎src/backend/catalog/pg_proc.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -928,7 +928,7 @@ fmgr_sql_validator(PG_FUNCTION_ARGS)
928928
querytree_list=NIL;
929929
foreach(lc,raw_parsetree_list)
930930
{
931-
RawStmt*parsetree=castNode(RawStmt,lfirst(lc));
931+
RawStmt*parsetree=lfirst_node(RawStmt,lc);
932932
List*querytree_sublist;
933933

934934
querytree_sublist=pg_analyze_and_rewrite_params(parsetree,

‎src/backend/commands/aggregatecmds.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -109,13 +109,13 @@ DefineAggregate(ParseState *pstate, List *name, List *args, bool oldstyle, List
109109
aggKind=AGGKIND_ORDERED_SET;
110110
else
111111
numDirectArgs=0;
112-
args=castNode(List,linitial(args));
112+
args=linitial_node(List,args);
113113
}
114114

115115
/* Examine aggregate's definition clauses */
116116
foreach(pl,parameters)
117117
{
118-
DefElem*defel=castNode(DefElem,lfirst(pl));
118+
DefElem*defel=lfirst_node(DefElem,pl);
119119

120120
/*
121121
* sfunc1, stype1, and initcond1 are accepted as obsolete spellings

‎src/backend/commands/async.c

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -1636,7 +1636,7 @@ AtSubCommit_Notify(void)
16361636
List*parentPendingActions;
16371637
List*parentPendingNotifies;
16381638

1639-
parentPendingActions=castNode(List,linitial(upperPendingActions));
1639+
parentPendingActions=linitial_node(List,upperPendingActions);
16401640
upperPendingActions=list_delete_first(upperPendingActions);
16411641

16421642
Assert(list_length(upperPendingActions)==
@@ -1647,7 +1647,7 @@ AtSubCommit_Notify(void)
16471647
*/
16481648
pendingActions=list_concat(parentPendingActions,pendingActions);
16491649

1650-
parentPendingNotifies=castNode(List,linitial(upperPendingNotifies));
1650+
parentPendingNotifies=linitial_node(List,upperPendingNotifies);
16511651
upperPendingNotifies=list_delete_first(upperPendingNotifies);
16521652

16531653
Assert(list_length(upperPendingNotifies)==
@@ -1679,13 +1679,13 @@ AtSubAbort_Notify(void)
16791679
*/
16801680
while (list_length(upperPendingActions)>my_level-2)
16811681
{
1682-
pendingActions=castNode(List,linitial(upperPendingActions));
1682+
pendingActions=linitial_node(List,upperPendingActions);
16831683
upperPendingActions=list_delete_first(upperPendingActions);
16841684
}
16851685

16861686
while (list_length(upperPendingNotifies)>my_level-2)
16871687
{
1688-
pendingNotifies=castNode(List,linitial(upperPendingNotifies));
1688+
pendingNotifies=linitial_node(List,upperPendingNotifies);
16891689
upperPendingNotifies=list_delete_first(upperPendingNotifies);
16901690
}
16911691
}

‎src/backend/commands/collationcmds.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -71,7 +71,7 @@ DefineCollation(ParseState *pstate, List *names, List *parameters, bool if_not_e
7171

7272
foreach(pl,parameters)
7373
{
74-
DefElem*defel=castNode(DefElem,lfirst(pl));
74+
DefElem*defel=lfirst_node(DefElem,pl);
7575
DefElem**defelp;
7676

7777
if (pg_strcasecmp(defel->defname,"from")==0)

‎src/backend/commands/copy.c

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1034,7 +1034,7 @@ ProcessCopyOptions(ParseState *pstate,
10341034
/* Extract options from the statement node tree */
10351035
foreach(option,options)
10361036
{
1037-
DefElem*defel=castNode(DefElem,lfirst(option));
1037+
DefElem*defel=lfirst_node(DefElem,option);
10381038

10391039
if (strcmp(defel->defname,"format")==0)
10401040
{
@@ -1488,7 +1488,7 @@ BeginCopy(ParseState *pstate,
14881488
/* examine queries to determine which error message to issue */
14891489
foreach(lc,rewritten)
14901490
{
1491-
Query*q=castNode(Query,lfirst(lc));
1491+
Query*q=lfirst_node(Query,lc);
14921492

14931493
if (q->querySource==QSRC_QUAL_INSTEAD_RULE)
14941494
ereport(ERROR,
@@ -1505,7 +1505,7 @@ BeginCopy(ParseState *pstate,
15051505
errmsg("multi-statement DO INSTEAD rules are not supported for COPY")));
15061506
}
15071507

1508-
query=castNode(Query,linitial(rewritten));
1508+
query=linitial_node(Query,rewritten);
15091509

15101510
/* The grammar allows SELECT INTO, but we don't support that */
15111511
if (query->utilityStmt!=NULL&&

‎src/backend/commands/createas.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -323,7 +323,7 @@ ExecCreateTableAs(CreateTableAsStmt *stmt, const char *queryString,
323323
elog(ERROR,"unexpected rewrite result for %s",
324324
is_matview ?"CREATE MATERIALIZED VIEW" :
325325
"CREATE TABLE AS SELECT");
326-
query=castNode(Query,linitial(rewritten));
326+
query=linitial_node(Query,rewritten);
327327
Assert(query->commandType==CMD_SELECT);
328328

329329
/* plan the query --- note we disallow parallelism */

‎src/backend/commands/dropcmds.c

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -214,7 +214,7 @@ type_in_list_does_not_exist_skipping(List *typenames, const char **msg,
214214

215215
foreach(l,typenames)
216216
{
217-
TypeName*typeName=castNode(TypeName,lfirst(l));
217+
TypeName*typeName=lfirst_node(TypeName,l);
218218

219219
if (typeName!=NULL)
220220
{
@@ -371,16 +371,16 @@ does_not_exist_skipping(ObjectType objtype, Node *object)
371371
{
372372
/* XXX quote or no quote? */
373373
msg=gettext_noop("cast from type %s to type %s does not exist, skipping");
374-
name=TypeNameToString(castNode(TypeName,linitial(castNode(List,object))));
375-
args=TypeNameToString(castNode(TypeName,lsecond(castNode(List,object))));
374+
name=TypeNameToString(linitial_node(TypeName,castNode(List,object)));
375+
args=TypeNameToString(lsecond_node(TypeName,castNode(List,object)));
376376
}
377377
}
378378
break;
379379
caseOBJECT_TRANSFORM:
380380
if (!type_in_list_does_not_exist_skipping(list_make1(linitial(castNode(List,object))),&msg,&name))
381381
{
382382
msg=gettext_noop("transform for type %s language \"%s\" does not exist, skipping");
383-
name=TypeNameToString(castNode(TypeName,linitial(castNode(List,object))));
383+
name=TypeNameToString(linitial_node(TypeName,castNode(List,object)));
384384
args=strVal(lsecond(castNode(List,object)));
385385
}
386386
break;

‎src/backend/commands/explain.c

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -253,7 +253,7 @@ ExplainQuery(ParseState *pstate, ExplainStmt *stmt, const char *queryString,
253253
/* Explain every plan */
254254
foreach(l,rewritten)
255255
{
256-
ExplainOneQuery(castNode(Query,lfirst(l)),
256+
ExplainOneQuery(lfirst_node(Query,l),
257257
CURSOR_OPT_PARALLEL_OK,NULL,es,
258258
queryString,params,queryEnv);
259259

@@ -408,7 +408,7 @@ ExplainOneUtility(Node *utilityStmt, IntoClause *into, ExplainState *es,
408408

409409
rewritten=QueryRewrite(castNode(Query,copyObject(ctas->query)));
410410
Assert(list_length(rewritten)==1);
411-
ExplainOneQuery(castNode(Query,linitial(rewritten)),
411+
ExplainOneQuery(linitial_node(Query,rewritten),
412412
0,ctas->into,es,
413413
queryString,params,queryEnv);
414414
}
@@ -427,7 +427,7 @@ ExplainOneUtility(Node *utilityStmt, IntoClause *into, ExplainState *es,
427427

428428
rewritten=QueryRewrite(castNode(Query,copyObject(dcs->query)));
429429
Assert(list_length(rewritten)==1);
430-
ExplainOneQuery(castNode(Query,linitial(rewritten)),
430+
ExplainOneQuery(linitial_node(Query,rewritten),
431431
dcs->options,NULL,es,
432432
queryString,params,queryEnv);
433433
}

‎src/backend/commands/extension.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -714,7 +714,7 @@ execute_sql_string(const char *sql, const char *filename)
714714
*/
715715
foreach(lc1,raw_parsetree_list)
716716
{
717-
RawStmt*parsetree=castNode(RawStmt,lfirst(lc1));
717+
RawStmt*parsetree=lfirst_node(RawStmt,lc1);
718718
List*stmt_list;
719719
ListCell*lc2;
720720

@@ -727,7 +727,7 @@ execute_sql_string(const char *sql, const char *filename)
727727

728728
foreach(lc2,stmt_list)
729729
{
730-
PlannedStmt*stmt=castNode(PlannedStmt,lfirst(lc2));
730+
PlannedStmt*stmt=lfirst_node(PlannedStmt,lc2);
731731

732732
CommandCounterIncrement();
733733

‎src/backend/commands/foreigncmds.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1589,7 +1589,7 @@ ImportForeignSchema(ImportForeignSchemaStmt *stmt)
15891589
*/
15901590
foreach(lc2,raw_parsetree_list)
15911591
{
1592-
RawStmt*rs=castNode(RawStmt,lfirst(lc2));
1592+
RawStmt*rs=lfirst_node(RawStmt,lc2);
15931593
CreateForeignTableStmt*cstmt= (CreateForeignTableStmt*)rs->stmt;
15941594
PlannedStmt*pstmt;
15951595

‎src/backend/commands/functioncmds.c

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -578,7 +578,7 @@ update_proconfig_value(ArrayType *a, List *set_items)
578578

579579
foreach(l,set_items)
580580
{
581-
VariableSetStmt*sstmt=castNode(VariableSetStmt,lfirst(l));
581+
VariableSetStmt*sstmt=lfirst_node(VariableSetStmt,l);
582582

583583
if (sstmt->kind==VAR_RESET_ALL)
584584
a=NULL;
@@ -972,7 +972,8 @@ CreateFunction(ParseState *pstate, CreateFunctionStmt *stmt)
972972

973973
foreach(lc,castNode(List,transformDefElem))
974974
{
975-
Oidtypeid=typenameTypeId(NULL,lfirst(lc));
975+
Oidtypeid=typenameTypeId(NULL,
976+
lfirst_node(TypeName,lc));
976977
Oidelt=get_base_element_type(typeid);
977978

978979
typeid=elt ?elt :typeid;

‎src/backend/commands/matview.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -264,7 +264,7 @@ ExecRefreshMatView(RefreshMatViewStmt *stmt, const char *queryString,
264264
* The stored query was rewritten at the time of the MV definition, but
265265
* has not been scribbled on by the planner.
266266
*/
267-
dataQuery=castNode(Query,linitial(actions));
267+
dataQuery=linitial_node(Query,actions);
268268

269269
/*
270270
* Check for active uses of the relation in the current transaction, such

‎src/backend/commands/opclasscmds.c

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -460,7 +460,7 @@ DefineOpClass(CreateOpClassStmt *stmt)
460460
*/
461461
foreach(l,stmt->items)
462462
{
463-
CreateOpClassItem*item=castNode(CreateOpClassItem,lfirst(l));
463+
CreateOpClassItem*item=lfirst_node(CreateOpClassItem,l);
464464
OidoperOid;
465465
OidfuncOid;
466466
OidsortfamilyOid;
@@ -834,7 +834,7 @@ AlterOpFamilyAdd(AlterOpFamilyStmt *stmt, Oid amoid, Oid opfamilyoid,
834834
*/
835835
foreach(l,items)
836836
{
837-
CreateOpClassItem*item=castNode(CreateOpClassItem,lfirst(l));
837+
CreateOpClassItem*item=lfirst_node(CreateOpClassItem,l);
838838
OidoperOid;
839839
OidfuncOid;
840840
OidsortfamilyOid;
@@ -959,7 +959,7 @@ AlterOpFamilyDrop(AlterOpFamilyStmt *stmt, Oid amoid, Oid opfamilyoid,
959959
*/
960960
foreach(l,items)
961961
{
962-
CreateOpClassItem*item=castNode(CreateOpClassItem,lfirst(l));
962+
CreateOpClassItem*item=lfirst_node(CreateOpClassItem,l);
963963
Oidlefttype,
964964
righttype;
965965
OpFamilyMember*member;

‎src/backend/commands/portalcmds.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -83,7 +83,7 @@ PerformCursorOpen(DeclareCursorStmt *cstmt, ParamListInfo params,
8383
if (list_length(rewritten)!=1)
8484
elog(ERROR,"non-SELECT statement in DECLARE CURSOR");
8585

86-
query=castNode(Query,linitial(rewritten));
86+
query=linitial_node(Query,rewritten);
8787

8888
if (query->commandType!=CMD_SELECT)
8989
elog(ERROR,"non-SELECT statement in DECLARE CURSOR");

‎src/backend/commands/prepare.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -267,7 +267,7 @@ ExecuteQuery(ExecuteStmt *stmt, IntoClause *intoClause,
267267
ereport(ERROR,
268268
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
269269
errmsg("prepared statement is not a SELECT")));
270-
pstmt=castNode(PlannedStmt,linitial(plan_list));
270+
pstmt=linitial_node(PlannedStmt,plan_list);
271271
if (pstmt->commandType!=CMD_SELECT)
272272
ereport(ERROR,
273273
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
@@ -679,7 +679,7 @@ ExplainExecuteQuery(ExecuteStmt *execstmt, IntoClause *into, ExplainState *es,
679679
/* Explain each query */
680680
foreach(p,plan_list)
681681
{
682-
PlannedStmt*pstmt=castNode(PlannedStmt,lfirst(p));
682+
PlannedStmt*pstmt=lfirst_node(PlannedStmt,p);
683683

684684
if (pstmt->commandType!=CMD_UTILITY)
685685
ExplainOnePlan(pstmt,into,es,query_string,paramLI,queryEnv,

‎src/backend/commands/tablecmds.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -5942,7 +5942,7 @@ ATExecSetIdentity(Relation rel, const char *colName, Node *def, LOCKMODE lockmod
59425942

59435943
foreach(option,castNode(List,def))
59445944
{
5945-
DefElem*defel=castNode(DefElem,lfirst(option));
5945+
DefElem*defel=lfirst_node(DefElem,option);
59465946

59475947
if (strcmp(defel->defname,"generated")==0)
59485948
{
@@ -9547,7 +9547,7 @@ ATPostAlterTypeParse(Oid oldId, Oid oldRelId, Oid refRelId, char *cmd,
95479547
querytree_list=NIL;
95489548
foreach(list_item,raw_parsetree_list)
95499549
{
9550-
RawStmt*rs=castNode(RawStmt,lfirst(list_item));
9550+
RawStmt*rs=lfirst_node(RawStmt,list_item);
95519551
Node*stmt=rs->stmt;
95529552

95539553
if (IsA(stmt,IndexStmt))

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