SQLite

Check-in [8e2ae24498]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Size optimization in the parser. (CVS 2004)
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 8e2ae2449882f70fe4e77c100193c053d7669ae6
User & Date: drh 2004-10-06 14:39:29.000
Context
2004-10-06
15:03
Move some work out of the makefiles and into awk scripts in separate files. Ticket #940. (CVS 2005) (check-in: 4d0f29d54c user: drh tags: trunk)
14:39
Size optimization in the parser. (CVS 2004) (check-in: 8e2ae24498 user: drh tags: trunk)
14:39
Fix the ".import" command of the command-line shell so that it ignores \n and \r at the end of a line. Ticket #939. (CVS 2003) (check-in: dcbf4817a7 user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/parse.y.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
**
*************************************************************************
** This file contains SQLite's grammar for SQL.  Process this file
** using the lemon parser generator to generate C code that runs
** the parser.  Lemon will also generate a header file containing
** numeric codes for all of the tokens.
**
** @(#) $Id: parse.y,v 1.142 2004/10/05 02:41:43 drh Exp $
*/
%token_prefix TK_
%token_type {Token}
%default_type {Token}
%extra_argument {Parse *pParse}
%syntax_error {
  if( pParse->zErrMsg==0 ){







|







10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
**
*************************************************************************
** This file contains SQLite's grammar for SQL.  Process this file
** using the lemon parser generator to generate C code that runs
** the parser.  Lemon will also generate a header file containing
** numeric codes for all of the tokens.
**
** @(#) $Id: parse.y,v 1.143 2004/10/06 14:39:29 drh Exp $
*/
%token_prefix TK_
%token_type {Token}
%default_type {Token}
%extra_argument {Parse *pParse}
%syntax_error {
  if( pParse->zErrMsg==0 ){
38
39
40
41
42
43
44









45
46
47
48
49
50
51
** An instance of this structure holds information about the
** LIMIT clause of a SELECT statement.
*/
struct LimitVal {
  int limit;    /* The LIMIT value.  -1 if there is no limit */
  int offset;   /* The OFFSET.  0 if there is none */
};










/*
** An instance of the following structure describes the event of a
** TRIGGER.  "a" is the event type, one of TK_UPDATE, TK_INSERT,
** TK_DELETE, or TK_INSTEAD.  If the event is of the form
**
**      UPDATE ON (a,b,c)







>
>
>
>
>
>
>
>
>







38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
** An instance of this structure holds information about the
** LIMIT clause of a SELECT statement.
*/
struct LimitVal {
  int limit;    /* The LIMIT value.  -1 if there is no limit */
  int offset;   /* The OFFSET.  0 if there is none */
};

/*
** An instance of this structure is used to store the LIKE,
** GLOB, NOT LIKE, and NOT GLOB operators.
*/
struct LikeOp {
  int opcode;   /* Either TK_GLOB or TK_LIKE */
  int not;      /* True if the NOT keyword is present */
};

/*
** An instance of the following structure describes the event of a
** TRIGGER.  "a" is the event type, one of TK_UPDATE, TK_INSERT,
** TK_DELETE, or TK_INSTEAD.  If the event is of the form
**
**      UPDATE ON (a,b,c)
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613


614
615
616
617
618
619
620
expr(A) ::= expr(X) BITOR(OP) expr(Y).  {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) LSHIFT(OP) expr(Y). {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) RSHIFT(OP) expr(Y). {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) likeop(OP) expr(Y).  [LIKE]  {
  ExprList *pList = sqlite3ExprListAppend(0, Y, 0);
  pList = sqlite3ExprListAppend(pList, X, 0);
  A = sqlite3ExprFunction(pList, 0);
  if( A ) A->op = OP;
  sqlite3ExprSpan(A, &X->span, &Y->span);
}
expr(A) ::= expr(X) NOT likeop(OP) expr(Y). [LIKE] {
  ExprList *pList = sqlite3ExprListAppend(0, Y, 0);
  pList = sqlite3ExprListAppend(pList, X, 0);
  A = sqlite3ExprFunction(pList, 0);
  if( A ) A->op = OP;
  A = sqlite3Expr(TK_NOT, A, 0, 0);
  sqlite3ExprSpan(A,&X->span,&Y->span);
}
%type likeop {int}
likeop(A) ::= LIKE. {A = TK_LIKE;}
likeop(A) ::= GLOB. {A = TK_GLOB;}


expr(A) ::= expr(X) PLUS(OP) expr(Y).   {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) MINUS(OP) expr(Y).  {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) STAR(OP) expr(Y).   {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) SLASH(OP) expr(Y).  {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) REM(OP) expr(Y).    {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) CONCAT(OP) expr(Y). {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) ISNULL(E). {







|
<
<
<
<
<
<
<
|
|

|
|
|
>
>







602
603
604
605
606
607
608
609







610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
expr(A) ::= expr(X) BITOR(OP) expr(Y).  {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) LSHIFT(OP) expr(Y). {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) RSHIFT(OP) expr(Y). {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) likeop(OP) expr(Y).  [LIKE]  {
  ExprList *pList = sqlite3ExprListAppend(0, Y, 0);
  pList = sqlite3ExprListAppend(pList, X, 0);
  A = sqlite3ExprFunction(pList, 0);
  if( A ) A->op = OP.opcode;







  if( OP.not ) A = sqlite3Expr(TK_NOT, A, 0, 0);
  sqlite3ExprSpan(A, &X->span, &Y->span);
}
%type likeop {struct LikeOp}
likeop(A) ::= LIKE.     {A.opcode = TK_LIKE; A.not = 0;}
likeop(A) ::= GLOB.     {A.opcode = TK_GLOB; A.not = 0;}
likeop(A) ::= NOT LIKE. {A.opcode = TK_LIKE; A.not = 1;}
likeop(A) ::= NOT GLOB. {A.opcode = TK_GLOB; A.not = 1;}
expr(A) ::= expr(X) PLUS(OP) expr(Y).   {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) MINUS(OP) expr(Y).  {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) STAR(OP) expr(Y).   {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) SLASH(OP) expr(Y).  {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) REM(OP) expr(Y).    {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) CONCAT(OP) expr(Y). {A = sqlite3Expr(@OP, X, Y, 0);}
expr(A) ::= expr(X) ISNULL(E). {
654
655
656
657
658
659
660

661
662
663
664
665
666
667
668
669
670
671
672
673
674
675



676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
  sqlite3ExprSpan(A,&B,&X->span);
}
expr(A) ::= LP(B) select(X) RP(E). {
  A = sqlite3Expr(TK_SELECT, 0, 0, 0);
  if( A ) A->pSelect = X;
  sqlite3ExprSpan(A,&B,&E);
}

expr(A) ::= expr(W) BETWEEN expr(X) AND expr(Y). {
  ExprList *pList = sqlite3ExprListAppend(0, X, 0);
  pList = sqlite3ExprListAppend(pList, Y, 0);
  A = sqlite3Expr(TK_BETWEEN, W, 0, 0);
  if( A ) A->pList = pList;
  sqlite3ExprSpan(A,&W->span,&Y->span);
}
expr(A) ::= expr(W) NOT BETWEEN expr(X) AND expr(Y). {
  ExprList *pList = sqlite3ExprListAppend(0, X, 0);
  pList = sqlite3ExprListAppend(pList, Y, 0);
  A = sqlite3Expr(TK_BETWEEN, W, 0, 0);
  if( A ) A->pList = pList;
  A = sqlite3Expr(TK_NOT, A, 0, 0);
  sqlite3ExprSpan(A,&W->span,&Y->span);
}



expr(A) ::= expr(X) IN LP exprlist(Y) RP(E).  {
  A = sqlite3Expr(TK_IN, X, 0, 0);
  if( A ) A->pList = Y;
  sqlite3ExprSpan(A,&X->span,&E);
}
expr(A) ::= expr(X) IN LP select(Y) RP(E).  {
  A = sqlite3Expr(TK_IN, X, 0, 0);
  if( A ) A->pSelect = Y;
  sqlite3ExprSpan(A,&X->span,&E);
}
expr(A) ::= expr(X) NOT IN LP exprlist(Y) RP(E).  {
  A = sqlite3Expr(TK_IN, X, 0, 0);
  if( A ) A->pList = Y;
  A = sqlite3Expr(TK_NOT, A, 0, 0);
  sqlite3ExprSpan(A,&X->span,&E);
}
expr(A) ::= expr(X) NOT IN LP select(Y) RP(E).  {
  A = sqlite3Expr(TK_IN, X, 0, 0);
  if( A ) A->pSelect = Y;
  A = sqlite3Expr(TK_NOT, A, 0, 0);
  sqlite3ExprSpan(A,&X->span,&E);
}
expr(A) ::= expr(X) IN nm(Y) dbnm(D). {
  SrcList *pSrc = sqlite3SrcListAppend(0, &Y, &D);
  A = sqlite3Expr(TK_IN, X, 0, 0);
  if( A ) A->pSelect = sqlite3SelectNew(0,pSrc,0,0,0,0,0,-1,0);
  sqlite3ExprSpan(A,&X->span,D.z?&D:&Y);
}
expr(A) ::= expr(X) NOT IN nm(Y) dbnm(D). {
  SrcList *pSrc = sqlite3SrcListAppend(0, &Y, &D);
  A = sqlite3Expr(TK_IN, X, 0, 0);
  if( A ) A->pSelect = sqlite3SelectNew(0,pSrc,0,0,0,0,0,-1,0);
  A = sqlite3Expr(TK_NOT, A, 0, 0);
  sqlite3ExprSpan(A,&X->span,D.z?&D:&Y);
}


/* CASE expressions */
expr(A) ::= CASE(C) case_operand(X) case_exprlist(Y) case_else(Z) END(E). {
  A = sqlite3Expr(TK_CASE, X, Z, 0);







>
|
<
<
|
<
<
<
|




|


>
>
>
|


<
<
<
|
<


<
<
<
<
<
<
|


|


|



<
<
<
<
<
<
|







658
659
660
661
662
663
664
665
666


667



668
669
670
671
672
673
674
675
676
677
678
679
680
681



682

683
684






685
686
687
688
689
690
691
692
693
694






695
696
697
698
699
700
701
702
  sqlite3ExprSpan(A,&B,&X->span);
}
expr(A) ::= LP(B) select(X) RP(E). {
  A = sqlite3Expr(TK_SELECT, 0, 0, 0);
  if( A ) A->pSelect = X;
  sqlite3ExprSpan(A,&B,&E);
}
%type between_op {int}
between_op(A) ::= BETWEEN.     {A = 0;}


between_op(A) ::= NOT BETWEEN. {A = 1;}



expr(A) ::= expr(W) between_op(N) expr(X) AND expr(Y). [BETWEEN] {
  ExprList *pList = sqlite3ExprListAppend(0, X, 0);
  pList = sqlite3ExprListAppend(pList, Y, 0);
  A = sqlite3Expr(TK_BETWEEN, W, 0, 0);
  if( A ) A->pList = pList;
  if( N ) A = sqlite3Expr(TK_NOT, A, 0, 0);
  sqlite3ExprSpan(A,&W->span,&Y->span);
}
%type in_op {int}
in_op(A) ::= IN.      {A = 0;}
in_op(A) ::= NOT IN.  {A = 1;}
expr(A) ::= expr(X) in_op(N) LP exprlist(Y) RP(E). [IN] {
  A = sqlite3Expr(TK_IN, X, 0, 0);
  if( A ) A->pList = Y;



  if( N ) A = sqlite3Expr(TK_NOT, A, 0, 0);

  sqlite3ExprSpan(A,&X->span,&E);
}






expr(A) ::= expr(X) in_op(N) LP select(Y) RP(E).  [IN] {
  A = sqlite3Expr(TK_IN, X, 0, 0);
  if( A ) A->pSelect = Y;
  if( N ) A = sqlite3Expr(TK_NOT, A, 0, 0);
  sqlite3ExprSpan(A,&X->span,&E);
}
expr(A) ::= expr(X) in_op(N) nm(Y) dbnm(D). [IN] {
  SrcList *pSrc = sqlite3SrcListAppend(0, &Y, &D);
  A = sqlite3Expr(TK_IN, X, 0, 0);
  if( A ) A->pSelect = sqlite3SelectNew(0,pSrc,0,0,0,0,0,-1,0);






  if( N ) A = sqlite3Expr(TK_NOT, A, 0, 0);
  sqlite3ExprSpan(A,&X->span,D.z?&D:&Y);
}


/* CASE expressions */
expr(A) ::= CASE(C) case_operand(X) case_exprlist(Y) case_else(Z) END(E). {
  A = sqlite3Expr(TK_CASE, X, Z, 0);