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The beginnings of changes to support pre-compiled SQL. Mostly untested,

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though all regression tests to pass. (CVS 1093)

FossilOrigin-Name: 912f47c72d3597c6d5acff765d94922bd660339a
This commit is contained in:
drh
2003-09-06 01:10:47 +00:00
parent c023e03ea5
commit 5045789694
12 changed files with 291 additions and 50 deletions
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42
src/main.c
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@@ -14,7 +14,7 @@
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.140 2003/07/27 17:26:23 drh Exp $
** $Id: main.c,v 1.141 2003/09/06 01:10:47 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
@@ -695,6 +695,32 @@ int sqlite_compile(
return sqliteMain(db, zSql, 0, 0, pzTail, ppVm, pzErrMsg);
}
/*
** If the SQL that was handed to sqlite_compile contains variables of
** the form $1, $2, $3, etc. then this routine assigns values to those
** variables. azValue[0] is assigned to $1. azValue[1] is assigned
** to $2. And so forth. The value of variable $0 will always be NULL.
** The values of any variable $N where N>nValue will be NULL. If any
** azValue[] is a NULL pointer, then the corresponding variable will be
** NULL.
**
** This routine can only be called immediately after sqlite_compile()
** or sqlite_reset() and before any calls to sqlite_step().
**
** This routine makes copies of all strings in azValue[] so the values
** passed in can be changed or deleted immediately after this call. The
** copies are deallocated when sqlite_finalize() or sqlite_reset() is
** invoked.
*/
int sqlite_instantiate(
sqlite_vm *pVm,
int nValue,
const char **azValue
){
return sqliteVdbeSetVariables((Vdbe*)pVm, nValue, azValue);
}
/*
** The following routine destroys a virtual machine that is created by
** the sqlite_compile() routine.
@@ -716,16 +742,18 @@ int sqlite_finalize(
}
/*
** Destroy a virtual machine in the same manner as sqlite_finalize(). If
** possible, leave *ppVm pointing at a new virtual machine which may be
** used to re-execute the query.
** Terminate the current execution of a virtual machine then
** reset the virtual machine back to its starting state so that it
** can be reused. Any error message resulting from the prior execution
** is written into *pzErrMsg. A success code from the prior execution
** is returned.
*/
int sqlite_reset(
sqlite_vm *pVm, /* The virtual machine to be destroyed */
char **pzErrMsg, /* OUT: Write error messages here */
sqlite_vm **ppVm /* OUT: The new virtual machine */
char **pzErrMsg /* OUT: Write error messages here */
){
int rc = sqliteVdbeReset((Vdbe*)pVm, pzErrMsg, (Vdbe **)ppVm);
int rc = sqliteVdbeReset((Vdbe*)pVm, pzErrMsg);
sqliteVdbeMakeReady((Vdbe*)pVm, 0, 0, 0);
sqliteStrRealloc(pzErrMsg);
return rc;
}