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Remove the stale implementation of the ifnull and coalesce functions - code

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that has been commented out for ages.  No functional changes.

FossilOrigin-Name: c2ad691174b8af2e8b158d8840cfc93f75d7db71
This commit is contained in:
drh
2012-09-10 15:02:32 +00:00
parent 9dc2a73662
commit 0fdbdbea03
3 changed files with 14 additions and 33 deletions
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31
src/func.c
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@@ -367,33 +367,14 @@ static void lowerFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
}
}
#if 0 /* This function is never used. */
/*
** The COALESCE() and IFNULL() functions used to be implemented as shown
** here. But now they are implemented as VDBE code so that unused arguments
** do not have to be computed. This legacy implementation is retained as
** comment.
** The COALESCE() and IFNULL() functions are implemented as VDBE code so
** that unused argument values do not have to be computed. However, we
** still need some kind of function implementation for this routines in
** the function table. That function implementation will never be called
** so it doesn't matter what the implementation is. We might as well use
** the "version()" function as a substitute.
*/
/*
** Implementation of the IFNULL(), NVL(), and COALESCE() functions.
** All three do the same thing. They return the first non-NULL
** argument.
*/
static void ifnullFunc(
sqlite3_context *context,
int argc,
sqlite3_value **argv
){
int i;
for(i=0; i<argc; i++){
if( SQLITE_NULL!=sqlite3_value_type(argv[i]) ){
sqlite3_result_value(context, argv[i]);
break;
}
}
}
#endif /* NOT USED */
#define ifnullFunc versionFunc /* Substitute function - never called */
/*