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Add support for SQLITE_TESTCTRL_TUNE and the ".testctrl tune ID VALUE" command

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in the CLI.

FossilOrigin-Name: f1199d58b9cfdcddb83bc35544ce38299ac4ed50d7ab90d33463f6ccce526feb
This commit is contained in:
drh
2021-06-04 13:16:46 +00:00
parent 2540a7482a
commit f3c1256a4d
6 changed files with 68 additions and 12 deletions
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23
src/main.c
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@@ -4283,6 +4283,29 @@ int sqlite3_test_control(int op, ...){
}
break;
}
#ifdef SQLITE_DEBUG
/* sqlite3_test_control(SQLITE_TESTCTRL_TUNE, id, val)
**
** "id" must be an integer between 0 and SQLITE_NTUNE-1. "val"
** is a 64-bit signed integer. This test-control sets tuning parameter
** id to the value val.
**
** Tuning parameters are for use during transient development builds,
** to help find the best values for constants in the query planner.
** Access tuning parameters using the Tuning(ID) macro. Set the
** parameters in the CLI using ".testctrl tune ID VALUE".
**
** Transient use only. Tuning parameters should not be used in
** checked-in code.
*/
case SQLITE_TESTCTRL_TUNE: {
int id = va_arg(ap, int);
int val = va_arg(ap, sqlite3_int64);
if( id>=0 && id<SQLITE_NTUNE ) Tuning(id) = val;
break;
}
#endif
}
va_end(ap);
#endif /* SQLITE_UNTESTABLE */