database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-08 14:02:16 +03:00
Code Activity

New Next opcode and indexing style implemented. (CVS 304)

Browse Source 
FossilOrigin-Name: decbeb9151885fee473b3fa58c8cf78a2338d2d8
This commit is contained in:
drh
2001-11-07 16:48:26 +00:00
parent 8721ce4ae7
commit 6b56344d4a
11 changed files with 301 additions and 376 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/sqliteInt.h
View File

@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.67 2001/11/06 04:00:19 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.68 2001/11/07 16:48:27 drh Exp $
*/
#include "sqlite.h"
#include "hash.h"
@@ -139,6 +139,7 @@ typedef struct Parse Parse;
typedef struct Token Token;
typedef struct IdList IdList;
typedef struct WhereInfo WhereInfo;
typedef struct WhereLevel WhereLevel;
typedef struct Select Select;
typedef struct AggExpr AggExpr;
@@ -298,6 +299,21 @@ struct IdList {
} *a; /* One entry for each identifier on the list */
};
/*
** For each nested loop in a WHERE clause implementation, the WhereInfo
** structure contains a single instance of this structure. This structure
** is intended to be private the the where.c module and should not be
** access or modified by other modules.
*/
struct WhereLevel {
int iMem; /* Memory cell used by this level */
Index *pIdx; /* Index used */
int iCur; /* Cursor number used for this index */
int brk; /* Jump here to break out of the loop */
int cont; /* Jump here to continue with the next loop cycle */
int op, p1, p2; /* Opcode used to terminate the loop */
};
/*
** The WHERE clause processing routine has two halves. The
** first part does the start of the WHERE loop and the second
@@ -311,7 +327,8 @@ struct WhereInfo {
int iContinue; /* Jump here to continue with next record */
int iBreak; /* Jump here to break out of the loop */
int base; /* Index of first Open opcode */
Index *aIdx[32]; /* Indices used for each table */
int nLevel; /* Number of nested loop */
WhereLevel a[1]; /* Information about each nest loop in the WHERE */
};
/*