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:-) (CVS 52)

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FossilOrigin-Name: c02268bdf4c28edc2542ce0ca1ba24fd6b5058fa
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drh
2000-06-05 18:54:46 +00:00
parent 9bb61fe751
commit 19a775c249
14 changed files with 473 additions and 190 deletions
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27
src/expr.c
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@@ -23,7 +23,7 @@
*************************************************************************
** This file contains C code routines used for processing expressions
**
** $Id: expr.c,v 1.5 2000/06/04 12:58:37 drh Exp $
** $Id: expr.c,v 1.6 2000/06/05 18:54:46 drh Exp $
*/
#include "sqliteInt.h"
@@ -32,8 +32,13 @@
** table fields. Nodes of the form ID.ID or ID resolve into an
** index to the table in the table list and a field offset. The opcode
** for such nodes is changed to TK_FIELD. The iTable value is changed
** to the index of the referenced table in pTabList, and the iField value
** is changed to the index of the field of the referenced table.
** to the index of the referenced table in pTabList plus the pParse->nTab
** value. The iField value is changed to the index of the field of the
** referenced table.
**
** This routine also looks for SELECTs that are part of an expression.
** If it finds any, it generates code to write the value of that select
** into a memory cell.
**
** Unknown fields or tables provoke an error. The function returns
** the number of errors seen and leaves an error message on pParse->zErrMsg.
@@ -54,7 +59,7 @@ int sqliteExprResolveIds(Parse *pParse, IdList *pTabList, Expr *pExpr){
for(j=0; j<pTab->nCol; j++){
if( sqliteStrICmp(pTab->aCol[j].zName, z)==0 ){
cnt++;
pExpr->iTable = i;
pExpr->iTable = i + pParse->nTab;
pExpr->iField = j;
}
}
@@ -104,7 +109,7 @@ int sqliteExprResolveIds(Parse *pParse, IdList *pTabList, Expr *pExpr){
for(j=0; j<pTab->nCol; j++){
if( sqliteStrICmp(pTab->aCol[j].zName, zRight)==0 ){
cnt++;
pExpr->iTable = i;
pExpr->iTable = i + pParse->nTab;
pExpr->iField = j;
}
}
@@ -132,6 +137,14 @@ int sqliteExprResolveIds(Parse *pParse, IdList *pTabList, Expr *pExpr){
break;
}
case TK_SELECT: {
pExpr->iField = pParse->nMem++;
if( sqliteSelect(pParse, pExpr->pSelect, -1, pExpr->iField) ){
return 1;
}
break;
}
/* For all else, just recursively walk the tree */
default: {
if( pExpr->pLeft
@@ -385,6 +398,10 @@ void sqliteExprCode(Parse *pParse, Expr *pExpr){
}
break;
}
case TK_SELECT: {
sqliteVdbeAddOp(v, OP_MemLoad, pExpr->iField, 0, 0, 0);
break;
}
}
return;
}