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Add the savepoint feature. This feature is largely untested at this point. (CVS 6036)

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FossilOrigin-Name: 34b56600ec0c5cd7b5faab265750252bc9850e3e
This commit is contained in:
danielk1977
2008-12-17 17:30:26 +00:00
parent f0f9f75443
commit fd7f045225
14 changed files with 820 additions and 251 deletions
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27
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.809 2008/12/10 21:19:57 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.810 2008/12/17 17:30:26 danielk1977 Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -522,6 +522,7 @@ typedef struct LookasideSlot LookasideSlot;
typedef struct Module Module;
typedef struct NameContext NameContext;
typedef struct Parse Parse;
typedef struct Savepoint Savepoint;
typedef struct Select Select;
typedef struct SrcList SrcList;
typedef struct StrAccum StrAccum;
@@ -765,6 +766,9 @@ struct sqlite3 {
#ifdef SQLITE_SSE
sqlite3_stmt *pFetch; /* Used by SSE to fetch stored statements */
#endif
Savepoint *pSavepoint; /* List of active savepoints */
int nSavepoint; /* Number of non-transaction savepoints */
u8 isTransactionSavepoint; /* True if the outermost savepoint is a TS */
};
/*
@@ -876,6 +880,25 @@ struct FuncDef {
#define AGGREGATE(zName, nArg, arg, nc, xStep, xFinal) \
{nArg, SQLITE_UTF8, nc*8, SQLITE_INT_TO_PTR(arg), 0, 0, xStep,xFinal,#zName,0}
/*
** All current savepoints are stored in a linked list starting at
** sqlite3.pSavepoint. The first element in the list is the most recently
** opened savepoint. Savepoints are added to the list by the vdbe
** OP_Savepoint instruction.
*/
struct Savepoint {
char *zName; /* Savepoint name (nul-terminated) */
Savepoint *pNext; /* Parent savepoint (if any) */
};
/*
** The following are used as the second parameter to sqlite3Savepoint(),
** and as the P1 argument to the OP_Savepoint instruction.
*/
#define SAVEPOINT_BEGIN 0
#define SAVEPOINT_RELEASE 1
#define SAVEPOINT_ROLLBACK 2
/*
** Each SQLite module (virtual table definition) is defined by an
@@ -2249,6 +2272,8 @@ void sqlite3CodeVerifySchema(Parse*, int);
void sqlite3BeginTransaction(Parse*, int);
void sqlite3CommitTransaction(Parse*);
void sqlite3RollbackTransaction(Parse*);
void sqlite3Savepoint(Parse*, int, Token*);
void sqlite3CloseSavepoints(sqlite3 *);
int sqlite3ExprIsConstant(Expr*);
int sqlite3ExprIsConstantNotJoin(Expr*);
int sqlite3ExprIsConstantOrFunction(Expr*);