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Add the sqlite_trace() hook for tracing the SQL that an application executes.

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The plan is to leave this API undocumented for the time being, in case we
want to make changes to it later. (CVS 836)

FossilOrigin-Name: f67bff8ff3db9694f87daf1a549d24ea9612da6b
This commit is contained in:
drh
2003-01-16 16:28:53 +00:00
parent db48ee02c4
commit 18de4824f6
6 changed files with 48 additions and 14 deletions
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25
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 1.106 2003/01/12 18:02:18 drh Exp $
** $Id: main.c,v 1.107 2003/01/16 16:28:54 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
@@ -602,6 +602,9 @@ int sqlite_exec(
){
Parse sParse;
#ifndef SQLITE_OMIT_TRACE
if( db->xTrace ) db->xTrace(db->pTraceArg, zSql);
#endif
if( pzErrMsg ) *pzErrMsg = 0;
if( sqliteSafetyOn(db) ) goto exec_misuse;
if( (db->flags & SQLITE_Initialized)==0 ){
@@ -858,6 +861,26 @@ int sqlite_function_type(sqlite *db, const char *zName, int dataType){
return SQLITE_OK;
}
/*
** Register a trace function. The pArg from the previously registered trace
** is returned.
**
** A NULL trace function means that no tracing is executes. A non-NULL
** trace is a pointer to a function that is invoked at the start of each
** sqlite_exec().
*/
void *sqlite_trace(sqlite *db, void (*xTrace)(void*,const char*), void *pArg){
#ifndef SQLITE_OMIT_TRACE
void *pOld = db->pTraceArg;
db->xTrace = xTrace;
db->pTraceArg = pArg;
return pOld;
#else
return 0;
#endif
}
/*
** Attempt to open the file named in the argument as the auxiliary database
** file. The auxiliary database file is used to store TEMP tables. But