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Allow parameters to be introduced by characters ':', '$' and '#'. This

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is an experimental change. (CVS 2523)

FossilOrigin-Name: f3427a139c3bd4faf9134ec6290b3eb829c0a19f
This commit is contained in:
drh
2005-06-22 08:48:06 +00:00
parent edef8fcd73
commit 288d37f1b4
5 changed files with 50 additions and 63 deletions
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17
src/expr.c
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@@ -12,7 +12,7 @@
** This file contains routines used for analyzing expressions and
** for generating VDBE code that evaluates expressions in SQLite.
**
** $Id: expr.c,v 1.206 2005/06/12 21:35:52 drh Exp $
** $Id: expr.c,v 1.207 2005/06/22 08:48:06 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -207,9 +207,8 @@ Expr *sqlite3Expr(int op, Expr *pLeft, Expr *pRight, const Token *pToken){
/*
** When doing a nested parse, you can include terms in an expression
** that look like this: #0 #1 #2 ... These terms refer to elements
** on the stack. "#0" (or just "#") means the top of the stack.
** "#1" means the next down on the stack. And so forth. #-1 means
** memory location 0. #-2 means memory location 1. And so forth.
** on the stack. "#0" means the top of the stack.
** "#1" means the next down on the stack. And so forth.
**
** This routine is called by the parser to deal with on of those terms.
** It immediately generates code to store the value in a memory location.
@@ -230,13 +229,9 @@ Expr *sqlite3RegisterExpr(Parse *pParse, Token *pToken){
return 0; /* Malloc failed */
}
depth = atoi(&pToken->z[1]);
if( depth>=0 ){
p->iTable = pParse->nMem++;
sqlite3VdbeAddOp(v, OP_Dup, depth, 0);
sqlite3VdbeAddOp(v, OP_MemStore, p->iTable, 1);
}else{
p->iTable = -1-depth;
}
p->iTable = pParse->nMem++;
sqlite3VdbeAddOp(v, OP_Dup, depth, 0);
sqlite3VdbeAddOp(v, OP_MemStore, p->iTable, 1);
return p;
}