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Add comments to test cases. Improvements to the query plan test variable. (CVS 2555)

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FossilOrigin-Name: ef3a157f469d72cbd2f713f997598ddf47f340d2
This commit is contained in:
drh
2005-07-21 03:48:20 +00:00
parent fe05af87f8
commit 7ec764a29e
6 changed files with 81 additions and 19 deletions
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51
src/where.c
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@@ -16,7 +16,7 @@
** so is applicable. Because this module is responsible for selecting
** indices, you might also think of this module as the "query optimizer".
**
** $Id: where.c,v 1.148 2005/07/21 03:15:00 drh Exp $
** $Id: where.c,v 1.149 2005/07/21 03:48:20 drh Exp $
*/
#include "sqliteInt.h"
@@ -1492,6 +1492,55 @@ WhereInfo *sqlite3WhereBegin(
}
}
}
#ifdef SQLITE_TEST /* For testing and debugging use only */
/* Record in the query plan information about the current table
** and the index used to access it (if any). If the table itself
** is not used, its name is just '{}'. If no index is used
** the index is listed as "{}". If the primary key is used the
** index name is '*'.
*/
for(i=0; i<pTabList->nSrc; i++){
char *z;
int n;
pTabItem = &pTabList->a[i];
pLevel = &pWInfo->a[i];
z = pTabItem->zAlias;
if( z==0 ) z = pTabItem->pTab->zName;
n = strlen(z);
if( n+nQPlan < sizeof(sqlite3_query_plan)-10 ){
if( pLevel->flags & WHERE_IDX_ONLY ){
strcpy(&sqlite3_query_plan[nQPlan], "{}");
nQPlan += 2;
}else{
strcpy(&sqlite3_query_plan[nQPlan], z);
nQPlan += n;
}
sqlite3_query_plan[nQPlan++] = ' ';
}
if( pLevel->flags & (WHERE_ROWID_EQ|WHERE_ROWID_RANGE) ){
strcpy(&sqlite3_query_plan[nQPlan], "* ");
nQPlan += 2;
}else if( pLevel->pIdx==0 ){
strcpy(&sqlite3_query_plan[nQPlan], "{} ");
nQPlan += 3;
}else{
n = strlen(pLevel->pIdx->zName);
if( n+nQPlan < sizeof(sqlite3_query_plan)-2 ){
strcpy(&sqlite3_query_plan[nQPlan], pLevel->pIdx->zName);
nQPlan += n;
sqlite3_query_plan[nQPlan++] = ' ';
}
}
}
while( nQPlan>0 && sqlite3_query_plan[nQPlan-1]==' ' ){
sqlite3_query_plan[--nQPlan] = 0;
}
sqlite3_query_plan[nQPlan] = 0;
nQPlan = 0;
#endif /* SQLITE_TEST // Testing and debugging use only */
pWInfo->iContinue = cont;
freeMaskSet(&maskSet);
whereClauseClear(&wc);