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Overview
| Comment: | Minor changes to the input grammar resulting in a faster and slightly smaller parser. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
a2c443c0ee9a0e0b2d10298b8a74ff00 |
| User & Date: | drh 2018-04-09 20:36:09 |
Context
|
2018-04-10
| ||
| 00:53 | Update the top-level README.md file to point to the whynotgit.html document. Put it on the correct branch, this time. check-in: a52e3cdd user: drh tags: trunk | |
|
2018-04-09
| ||
| 20:36 | Minor changes to the input grammar resulting in a faster and slightly smaller parser. check-in: a2c443c0 user: drh tags: trunk | |
| 15:57 | Enhance the query planner so that it detects when the xBestIndex method of a virtual table gives out-of-sequence argvIndex values and reports an error. Secondary fix for ticket [2b8aed9f7c9e6]. check-in: 9506ec14 user: drh tags: trunk | |
Changes
Changes to src/parse.y.
460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 ... 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 ... 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 ... 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 ... 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 .... 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 |
){
sqlite3ErrorMsg(pParse, "too many terms in compound SELECT");
}
}
}
}
select(A) ::= with(W) selectnowith(X). {
Select *p = X;
if( p ){
p->pWith = W;
parserDoubleLinkSelect(pParse, p);
}else{
sqlite3WithDelete(pParse->db, W);
}
A = p; /*A-overwrites-W*/
}
selectnowith(A) ::= oneselect(A).
%ifndef SQLITE_OMIT_COMPOUND_SELECT
selectnowith(A) ::= selectnowith(A) multiselect_op(Y) oneselect(Z). {
Select *pRhs = Z;
Select *pLhs = A;
................................................................................
%type dbnm {Token}
dbnm(A) ::= . {A.z=0; A.n=0;}
dbnm(A) ::= DOT nm(X). {A = X;}
%type fullname {SrcList*}
%destructor fullname {sqlite3SrcListDelete(pParse->db, $$);}
fullname(A) ::= nm(X) dbnm(Y).
{A = sqlite3SrcListAppend(pParse->db,0,&X,&Y); /*A-overwrites-X*/}
%type joinop {int}
joinop(X) ::= COMMA|JOIN. { X = JT_INNER; }
joinop(X) ::= JOIN_KW(A) JOIN.
{X = sqlite3JoinType(pParse,&A,0,0); /*X-overwrites-A*/}
joinop(X) ::= JOIN_KW(A) nm(B) JOIN.
................................................................................
{A = sqlite3PExpr(pParse,TK_LIMIT,X,Y);}
limit_opt(A) ::= LIMIT expr(X) COMMA expr(Y).
{A = sqlite3PExpr(pParse,TK_LIMIT,Y,X);}
/////////////////////////// The DELETE statement /////////////////////////////
//
%ifdef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
cmd ::= with(C) DELETE FROM fullname(X) indexed_opt(I) where_opt(W)
orderby_opt(O) limit_opt(L). {
sqlite3WithPush(pParse, C, 1);
sqlite3SrcListIndexedBy(pParse, X, &I);
sqlite3DeleteFrom(pParse,X,W,O,L);
}
%endif
%ifndef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
cmd ::= with(C) DELETE FROM fullname(X) indexed_opt(I) where_opt(W). {
sqlite3WithPush(pParse, C, 1);
sqlite3SrcListIndexedBy(pParse, X, &I);
sqlite3DeleteFrom(pParse,X,W,0,0);
}
%endif
%type where_opt {Expr*}
%destructor where_opt {sqlite3ExprDelete(pParse->db, $$);}
................................................................................
where_opt(A) ::= . {A = 0;}
where_opt(A) ::= WHERE expr(X). {A = X;}
////////////////////////// The UPDATE command ////////////////////////////////
//
%ifdef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
cmd ::= with(C) UPDATE orconf(R) fullname(X) indexed_opt(I) SET setlist(Y)
where_opt(W) orderby_opt(O) limit_opt(L). {
sqlite3WithPush(pParse, C, 1);
sqlite3SrcListIndexedBy(pParse, X, &I);
sqlite3ExprListCheckLength(pParse,Y,"set list");
sqlite3Update(pParse,X,Y,W,R,O,L);
}
%endif
%ifndef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
cmd ::= with(C) UPDATE orconf(R) fullname(X) indexed_opt(I) SET setlist(Y)
where_opt(W). {
sqlite3WithPush(pParse, C, 1);
sqlite3SrcListIndexedBy(pParse, X, &I);
sqlite3ExprListCheckLength(pParse,Y,"set list");
sqlite3Update(pParse,X,Y,W,R,0,0);
}
%endif
%type setlist {ExprList*}
................................................................................
}
setlist(A) ::= LP idlist(X) RP EQ expr(Y). {
A = sqlite3ExprListAppendVector(pParse, 0, X, Y);
}
////////////////////////// The INSERT command /////////////////////////////////
//
cmd ::= with(W) insert_cmd(R) INTO fullname(X) idlist_opt(F) select(S). {
sqlite3WithPush(pParse, W, 1);
sqlite3Insert(pParse, X, S, F, R);
}
cmd ::= with(W) insert_cmd(R) INTO fullname(X) idlist_opt(F) DEFAULT VALUES.
{
sqlite3WithPush(pParse, W, 1);
sqlite3Insert(pParse, X, 0, F, R);
}
%type insert_cmd {int}
insert_cmd(A) ::= INSERT orconf(R). {A = R;}
insert_cmd(A) ::= REPLACE. {A = OE_Replace;}
................................................................................
anylist ::= .
anylist ::= anylist LP anylist RP.
anylist ::= anylist ANY.
%endif SQLITE_OMIT_VIRTUALTABLE
//////////////////////// COMMON TABLE EXPRESSIONS ////////////////////////////
%type with {With*}
%type wqlist {With*}
%destructor with {sqlite3WithDelete(pParse->db, $$);}
%destructor wqlist {sqlite3WithDelete(pParse->db, $$);}
with(A) ::= . {A = 0;}
%ifndef SQLITE_OMIT_CTE
with(A) ::= WITH wqlist(W). { A = W; }
with(A) ::= WITH RECURSIVE wqlist(W). { A = W; }
wqlist(A) ::= nm(X) eidlist_opt(Y) AS LP select(Z) RP. {
A = sqlite3WithAdd(pParse, 0, &X, Y, Z); /*A-overwrites-X*/
}
wqlist(A) ::= wqlist(A) COMMA nm(X) eidlist_opt(Y) AS LP select(Z) RP. {
A = sqlite3WithAdd(pParse, A, &X, Y, Z);
}
%endif SQLITE_OMIT_CTE
|
| > > > > > > > > > > > > > > > > > | | > > | < | < | < | < | < | < < < | | | |
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){
sqlite3ErrorMsg(pParse, "too many terms in compound SELECT");
}
}
}
}
select(A) ::= WITH wqlist(W) selectnowith(X). {
Select *p = X;
if( p ){
p->pWith = W;
parserDoubleLinkSelect(pParse, p);
}else{
sqlite3WithDelete(pParse->db, W);
}
A = p;
}
select(A) ::= WITH RECURSIVE wqlist(W) selectnowith(X). {
Select *p = X;
if( p ){
p->pWith = W;
parserDoubleLinkSelect(pParse, p);
}else{
sqlite3WithDelete(pParse->db, W);
}
A = p;
}
select(A) ::= selectnowith(X). {
Select *p = X;
if( p ){
parserDoubleLinkSelect(pParse, p);
}
A = p; /*A-overwrites-X*/
}
selectnowith(A) ::= oneselect(A).
%ifndef SQLITE_OMIT_COMPOUND_SELECT
selectnowith(A) ::= selectnowith(A) multiselect_op(Y) oneselect(Z). {
Select *pRhs = Z;
Select *pLhs = A;
................................................................................
%type dbnm {Token}
dbnm(A) ::= . {A.z=0; A.n=0;}
dbnm(A) ::= DOT nm(X). {A = X;}
%type fullname {SrcList*}
%destructor fullname {sqlite3SrcListDelete(pParse->db, $$);}
fullname(A) ::= nm(X).
{A = sqlite3SrcListAppend(pParse->db,0,&X,0); /*A-overwrites-X*/}
fullname(A) ::= nm(X) DOT nm(Y).
{A = sqlite3SrcListAppend(pParse->db,0,&X,&Y); /*A-overwrites-X*/}
%type joinop {int}
joinop(X) ::= COMMA|JOIN. { X = JT_INNER; }
joinop(X) ::= JOIN_KW(A) JOIN.
{X = sqlite3JoinType(pParse,&A,0,0); /*X-overwrites-A*/}
joinop(X) ::= JOIN_KW(A) nm(B) JOIN.
................................................................................
{A = sqlite3PExpr(pParse,TK_LIMIT,X,Y);}
limit_opt(A) ::= LIMIT expr(X) COMMA expr(Y).
{A = sqlite3PExpr(pParse,TK_LIMIT,Y,X);}
/////////////////////////// The DELETE statement /////////////////////////////
//
%ifdef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
cmd ::= with DELETE FROM fullname(X) indexed_opt(I) where_opt(W)
orderby_opt(O) limit_opt(L). {
sqlite3SrcListIndexedBy(pParse, X, &I);
sqlite3DeleteFrom(pParse,X,W,O,L);
}
%endif
%ifndef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
cmd ::= with DELETE FROM fullname(X) indexed_opt(I) where_opt(W). {
sqlite3SrcListIndexedBy(pParse, X, &I);
sqlite3DeleteFrom(pParse,X,W,0,0);
}
%endif
%type where_opt {Expr*}
%destructor where_opt {sqlite3ExprDelete(pParse->db, $$);}
................................................................................
where_opt(A) ::= . {A = 0;}
where_opt(A) ::= WHERE expr(X). {A = X;}
////////////////////////// The UPDATE command ////////////////////////////////
//
%ifdef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
cmd ::= with UPDATE orconf(R) fullname(X) indexed_opt(I) SET setlist(Y)
where_opt(W) orderby_opt(O) limit_opt(L). {
sqlite3SrcListIndexedBy(pParse, X, &I);
sqlite3ExprListCheckLength(pParse,Y,"set list");
sqlite3Update(pParse,X,Y,W,R,O,L);
}
%endif
%ifndef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
cmd ::= with UPDATE orconf(R) fullname(X) indexed_opt(I) SET setlist(Y)
where_opt(W). {
sqlite3SrcListIndexedBy(pParse, X, &I);
sqlite3ExprListCheckLength(pParse,Y,"set list");
sqlite3Update(pParse,X,Y,W,R,0,0);
}
%endif
%type setlist {ExprList*}
................................................................................
}
setlist(A) ::= LP idlist(X) RP EQ expr(Y). {
A = sqlite3ExprListAppendVector(pParse, 0, X, Y);
}
////////////////////////// The INSERT command /////////////////////////////////
//
cmd ::= with insert_cmd(R) INTO fullname(X) idlist_opt(F) select(S). {
sqlite3Insert(pParse, X, S, F, R);
}
cmd ::= with insert_cmd(R) INTO fullname(X) idlist_opt(F) DEFAULT VALUES.
{
sqlite3Insert(pParse, X, 0, F, R);
}
%type insert_cmd {int}
insert_cmd(A) ::= INSERT orconf(R). {A = R;}
insert_cmd(A) ::= REPLACE. {A = OE_Replace;}
................................................................................
anylist ::= .
anylist ::= anylist LP anylist RP.
anylist ::= anylist ANY.
%endif SQLITE_OMIT_VIRTUALTABLE
//////////////////////// COMMON TABLE EXPRESSIONS ////////////////////////////
%type wqlist {With*}
%destructor wqlist {sqlite3WithDelete(pParse->db, $$);}
with ::= .
%ifndef SQLITE_OMIT_CTE
with ::= WITH wqlist(W). { sqlite3WithPush(pParse, W, 1); }
with ::= WITH RECURSIVE wqlist(W). { sqlite3WithPush(pParse, W, 1); }
wqlist(A) ::= nm(X) eidlist_opt(Y) AS LP select(Z) RP. {
A = sqlite3WithAdd(pParse, 0, &X, Y, Z); /*A-overwrites-X*/
}
wqlist(A) ::= wqlist(A) COMMA nm(X) eidlist_opt(Y) AS LP select(Z) RP. {
A = sqlite3WithAdd(pParse, A, &X, Y, Z);
}
%endif SQLITE_OMIT_CTE
|
Changes to src/select.c.
4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 |
}
assert( p->pSrc!=0 );
if( (selFlags & SF_Expanded)!=0 ){
return WRC_Prune;
}
pTabList = p->pSrc;
pEList = p->pEList;
if( OK_IF_ALWAYS_TRUE(p->pWith) ){
sqlite3WithPush(pParse, p->pWith, 0);
}
/* Make sure cursor numbers have been assigned to all entries in
** the FROM clause of the SELECT statement.
*/
sqlite3SrcListAssignCursors(pParse, pTabList);
/* Look up every table named in the FROM clause of the select. If
|
< | < |
4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 |
}
assert( p->pSrc!=0 );
if( (selFlags & SF_Expanded)!=0 ){
return WRC_Prune;
}
pTabList = p->pSrc;
pEList = p->pEList;
sqlite3WithPush(pParse, p->pWith, 0);
/* Make sure cursor numbers have been assigned to all entries in
** the FROM clause of the SELECT statement.
*/
sqlite3SrcListAssignCursors(pParse, pTabList);
/* Look up every table named in the FROM clause of the select. If
|