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MWL#17: Table elimination

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- Mark gcov deadcode
This commit is contained in:
Sergey Petrunya 2009-08-25 17:59:15 +03:00
parent de41681afa
commit 0e7a18e4a8
1 changed files with 12 additions and 10 deletions
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22
sql/opt_table_elimination.cc
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@ -197,7 +197,7 @@ class Value_dep : public Sql_alloc
public:
Value_dep(): bound(FALSE), next(NULL) {}
virtual void now_bound(Func_dep_analyzer *fda, Module_dep **bound_modules)=0;
virtual ~Value_dep() {} /* only to shut up compiler warnings */
virtual ~Value_dep(){} /* purecov: inspected */ /* stop compiler warnings */
bool bound;
Value_dep *next;
@ -264,7 +264,7 @@ class Module_dep : public Sql_alloc
{
public:
virtual bool now_bound(Func_dep_analyzer *fda, Value_dep **bound_modules)=0;
virtual ~Module_dep(){}
virtual ~Module_dep(){} /* purecov: inspected */ /* stop compiler warnings */
/*
Used to make a linked list of elements that became bound and thus can
make elements that depend on them bound, too.
@ -510,7 +510,7 @@ void build_eq_mods_for_cond(Func_dep_analyzer *fda, Equality_module **eq_mod,
Item_equal *item_equal= (Item_equal*)cond;
List<Field_value> *fvl;
if (!(fvl= new List<Field_value>))
break;
break; /* purecov: inspected */
Item_equal_iterator it(*item_equal);
Item_field *item;
@ -802,6 +802,7 @@ static void add_eq_mod2(Func_dep_analyzer *fda, Equality_module **eq_mod,
We've filled the entire equality_mods array. Replace it with a bigger
one. We do it somewhat inefficiently but it doesn't matter.
*/
/* purecov: begin inspected */
Equality_module *new_arr;
if (!(new_arr= new Equality_module[fda->n_equality_mods_alloced *2]))
return;
@ -811,6 +812,7 @@ static void add_eq_mod2(Func_dep_analyzer *fda, Equality_module **eq_mod,
fda->equality_mods= new_arr;
*eq_mod= new_arr + (*eq_mod - fda->equality_mods);
/* purecov: end */
}
(*eq_mod)->field= field_val;
@ -828,7 +830,7 @@ static Table_value *get_table_value(Func_dep_analyzer *fda, TABLE *table)
{
Table_value *tbl_dep;
if (!(tbl_dep= new Table_value(table)))
return NULL;
return NULL; /* purecov: inspected */
Key_module **key_list= &(tbl_dep->keys);
/* Add dependencies for unique keys */
@ -972,7 +974,7 @@ bool setup_equality_modules_deps(Func_dep_analyzer *fda,
if (!(buf= current_thd->alloc(bitmap_buffer_size(offset))) ||
bitmap_init(&fda->expr_deps, (my_bitmap_map*)buf, offset, FALSE))
{
DBUG_RETURN(TRUE);
DBUG_RETURN(TRUE); /* purecov: inspected */
}
bitmap_clear_all(&fda->expr_deps);
@ -1077,7 +1079,7 @@ void eliminate_tables(JOIN *join)
#ifndef DBUG_OFF
if (!optimizer_flag(thd, OPTIMIZER_SWITCH_TABLE_ELIMINATION))
DBUG_VOID_RETURN;
DBUG_VOID_RETURN; /* purecov: inspected */
#endif
/* Find the tables that are referred to from WHERE/HAVING */
@ -1256,7 +1258,7 @@ bool check_func_dependency(JOIN *join,
join->thd->lex->current_select->between_count;
if (!(fda.equality_mods= new Equality_module[fda.n_equality_mods_alloced]))
return FALSE;
return FALSE; /* purecov: inspected */
Equality_module* last_eq_mod= fda.equality_mods;
@ -1264,7 +1266,7 @@ bool check_func_dependency(JOIN *join,
if (oj_tbl)
{
if (!get_table_value(&fda, oj_tbl->table))
return FALSE;
return FALSE; /* purecov: inspected */
}
else
{
@ -1274,7 +1276,7 @@ bool check_func_dependency(JOIN *join,
if (tbl->table && (tbl->table->map & dep_tables))
{
if (!get_table_value(&fda, tbl->table))
return FALSE;
return FALSE; /* purecov: inspected */
}
}
}
@ -1292,7 +1294,7 @@ bool check_func_dependency(JOIN *join,
if (!(fda.outer_join_dep= new Outer_join_module(my_count_bits(dep_tables))) ||
setup_equality_modules_deps(&fda, &bound_modules))
{
return FALSE; /* OOM, default to non-dependent */
return FALSE; /* OOM, default to non-dependent */ /* purecov: inspected */
}
DBUG_EXECUTE("test", dbug_print_deps(&fda); );