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Add the ability to disable the covering-index-scan optimization at compile-time,

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start-time, or at run-time.  Add test cases to check this configurability.

FossilOrigin-Name: ccb8ecc30c8e6c7760131250297c2e452bbac43b
This commit is contained in:
drh
2012-09-17 20:44:46 +00:00
parent ee4b21e9f3
commit de9a7b8a94
11 changed files with 170 additions and 16 deletions
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30
src/test_malloc.c
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@@ -1197,6 +1197,35 @@ static int test_config_uri(
return TCL_OK;
}
/*
** Usage: sqlite3_config_cis BOOLEAN
**
** Enables or disables the use of the covering-index scan optimization.
** SQLITE_CONFIG_COVERING_INDEX_SCAN.
*/
static int test_config_cis(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int rc;
int bUseCis;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "BOOL");
return TCL_ERROR;
}
if( Tcl_GetBooleanFromObj(interp, objv[1], &bUseCis) ){
return TCL_ERROR;
}
rc = sqlite3_config(SQLITE_CONFIG_COVERING_INDEX_SCAN, bUseCis);
Tcl_SetResult(interp, (char *)sqlite3TestErrorName(rc), TCL_VOLATILE);
return TCL_OK;
}
/*
** Usage: sqlite3_dump_memsys3 FILENAME
** sqlite3_dump_memsys5 FILENAME
@@ -1447,6 +1476,7 @@ int Sqlitetest_malloc_Init(Tcl_Interp *interp){
{ "sqlite3_config_lookaside", test_config_lookaside ,0 },
{ "sqlite3_config_error", test_config_error ,0 },
{ "sqlite3_config_uri", test_config_uri ,0 },
{ "sqlite3_config_cis", test_config_cis ,0 },
{ "sqlite3_db_config_lookaside",test_db_config_lookaside ,0 },
{ "sqlite3_dump_memsys3", test_dump_memsys3 ,3 },
{ "sqlite3_dump_memsys5", test_dump_memsys3 ,5 },