database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-01 03:47:19 +03:00
Code Activity

Condition pushdown to storage engine

Browse Source
This commit is contained in:
unknown
2004-12-17 21:13:22 +01:00
parent 66f7bd2441
commit bda84af2a6
16 changed files with 1093 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/mysql_com.h
View File

@ -339,7 +339,7 @@ struct rand_struct {
/* The following is for user defined functions */
enum Item_result {STRING_RESULT, REAL_RESULT, INT_RESULT, ROW_RESULT};
enum Item_result {STRING_RESULT= 0, REAL_RESULT, INT_RESULT, ROW_RESULT};
typedef struct st_udf_args
{

26
mysql-test/r/ndb_condition_pushdown.result Normal file
View File

@ -0,0 +1,26 @@
DROP TABLE IF EXISTS t1,t2;
CREATE TABLE t1 (pk1 int unsigned NOT NULL PRIMARY KEY, attr1 int unsigned NOT NULL, attr2 int unsigned, attr3 VARCHAR(10) ) ENGINE=ndbcluster;
insert into t1 values (0,0,0, "a"),(1,1,1,"b"),(2,2,NULL,NULL),(3,3,3,"d"),(4,4,4,"e"),(5,5,5,"f");
CREATE TABLE t2 (pk1 int unsigned NOT NULL PRIMARY KEY, attr1 int unsigned NOT NULL, attr2 int unsigned, attr3 VARCHAR(10) ) ENGINE=ndbcluster;
insert into t2 values (0,0,0, "a"),(1,1,1,"b"),(2,2,2,"c"),(3,3,3,"d"),(4,4,4,"e"),(5,5,5,"f");
set @old_ndbcpd = @@session.ndb_condition_pushdown;
set ndb_condition_pushdown = off;
select * from t1 where attr3 is null or attr1 > 2 and pk1= 3 order by pk1;
pk1 attr1 attr2 attr3
2 2 NULL NULL
3 3 3 d
select * from t1,t2 where t1.attr1 > 1 and t1.attr2 = t2.attr2 and t2.attr1 < 5 order by t1.pk1;
pk1 attr1 attr2 attr3 pk1 attr1 attr2 attr3
3 3 3 d 3 3 3 d
4 4 4 e 4 4 4 e
set ndb_condition_pushdown = on;
select * from t1 where attr3 is null or attr1 > 2 and pk1= 3 order by pk1;
pk1 attr1 attr2 attr3
2 2 NULL NULL
3 3 3 d
select * from t1,t2 where t1.attr1 > 1 and t1.attr2 = t2.attr2 and t2.attr1 < 5 order by t1.pk1;
pk1 attr1 attr2 attr3 pk1 attr1 attr2 attr3
3 3 3 d 3 3 3 d
4 4 4 e 4 4 4 e
set ndb_condition_pushdown = @old_ndbcpd;
DROP TABLE t1,t2;

26
mysql-test/t/ndb_condition_pushdown.test Normal file
View File

@ -0,0 +1,26 @@
-- source include/have_ndb.inc
--disable_warnings
DROP TABLE IF EXISTS t1,t2;
--enable_warnings
#
# Test of condition pushdown to storage engine
#
CREATE TABLE t1 (pk1 int unsigned NOT NULL PRIMARY KEY, attr1 int unsigned NOT NULL, attr2 int unsigned, attr3 VARCHAR(10) ) ENGINE=ndbcluster;
insert into t1 values (0,0,0, "a"),(1,1,1,"b"),(2,2,NULL,NULL),(3,3,3,"d"),(4,4,4,"e"),(5,5,5,"f");
CREATE TABLE t2 (pk1 int unsigned NOT NULL PRIMARY KEY, attr1 int unsigned NOT NULL, attr2 int unsigned, attr3 VARCHAR(10) ) ENGINE=ndbcluster;
insert into t2 values (0,0,0, "a"),(1,1,1,"b"),(2,2,2,"c"),(3,3,3,"d"),(4,4,4,"e"),(5,5,5,"f");
set @old_ndbcpd = @@session.ndb_condition_pushdown;
set ndb_condition_pushdown = off;
select * from t1 where attr3 is null or attr1 > 2 and pk1= 3 order by pk1;
select * from t1,t2 where t1.attr1 > 1 and t1.attr2 = t2.attr2 and t2.attr1 < 5 order by t1.pk1;
set ndb_condition_pushdown = on;
select * from t1 where attr3 is null or attr1 > 2 and pk1= 3 order by pk1;
select * from t1,t2 where t1.attr1 > 1 and t1.attr2 = t2.attr2 and t2.attr1 < 5 order by t1.pk1;
set ndb_condition_pushdown = @old_ndbcpd;
DROP TABLE t1,t2;

4
ndb/src/ndbapi/NdbDictionaryImpl.hpp
View File

@ -531,7 +531,7 @@ NdbTableImpl::getColumn(const char * name){
do {
if(hashValue == (tmp & 0xFFFE)){
NdbColumnImpl* col = cols[tmp >> 16];
if(strcmp(name, col->m_name.c_str()) == 0){
if(strncmp(name, col->m_name.c_str(), NDB_MAX_ATTR_NAME_SIZE-1) == 0){
return col;
}
}
@ -549,7 +549,7 @@ NdbTableImpl::getColumn(const char * name){
} else {
for(Uint32 i = 0; i<sz; i++){
NdbColumnImpl* col = * cols++;
if(col != 0 && strcmp(name, col->m_name.c_str()) == 0)
if(col != 0 && strncmp(name, col->m_name.c_str(), NDB_MAX_ATTR_NAME_SIZE-1) == 0)
return col;
}
}

802
sql/ha_ndbcluster.cc
View File

@ -196,10 +196,212 @@ int execute_no_commit_ie(ha_ndbcluster *h, NdbConnection *trans)
return trans->execute(NoCommit,IgnoreError,h->m_force_send);
}
/*
CPDH condition storage support
*/
Ndb_item::Ndb_item(NDB_ITEM_TYPE item_type,
NDB_ITEM_QUALIFICATION item_qualification,
const Item *item_value)
: type(item_type), qualification(item_qualification)
{
switch(item_type) {
case(NDB_VALUE):
{
switch(item_qualification.value_type) {
case(Item::STRING_ITEM): {
Ndb_item_string_value *string_value = new Ndb_item_string_value();
Item_string *string_item= (Item_string *)item_value;
string_value->s= string_item->str_value;
string_value->c= string_item->collation.collation;
value.string_value= string_value;
break;
}
case(Item::INT_ITEM): {
value.int_value= ((Item_int *)item_value)->val_int();
break;
}
case(Item::REAL_ITEM): {
value.real_value= ((Item_real *)item_value)->val_real();
break;
}
case(Item::NULL_ITEM):
break;
case(Item::VARBIN_ITEM): {
Ndb_item_string_value *string_value = new Ndb_item_string_value();
Item_varbinary *varbin_item= (Item_varbinary *)item_value;
string_value->s= varbin_item->str_value;
string_value->c= varbin_item->collation.collation;
value.string_value= string_value;
break;
}
default:
break;
}
}
break;
case(NDB_FIELD): {
NDB_ITEM_FIELD_VALUE *field_value= new NDB_ITEM_FIELD_VALUE();
Item_field *field_item= (Item_field *) item_value;
field_value->field= field_item->field;
field_value->column_no= -1; // Will be fetched at scan filter generation
value.field_value= field_value;
break;
}
case(NDB_FUNCTION):
break;
}
}
Ndb_item::Ndb_item(longlong int_value) : type(NDB_VALUE)
{
qualification.value_type= Item::INT_ITEM;
value.int_value= int_value;
}
Ndb_item::Ndb_item(double real_value) : type(NDB_VALUE)
{
qualification.value_type= Item::REAL_ITEM;
value.real_value= real_value;
}
Ndb_item::Ndb_item(): type(NDB_VALUE)
{
qualification.value_type= Item::NULL_ITEM;
}
Ndb_item::Ndb_item(Field *field, int column_no) : type(NDB_FIELD)
{
NDB_ITEM_FIELD_VALUE *field_value= new NDB_ITEM_FIELD_VALUE();
qualification.field_type= field->type();
field_value->field= field;
field_value->column_no= column_no;
value.field_value= field_value;
}
Ndb_item::Ndb_item(Item_func::Functype func_type) : type(NDB_FUNCTION)
{
qualification.function_type= func_type;
}
Ndb_item::~Ndb_item()
{
if (type == NDB_VALUE &&
(qualification.value_type == Item::STRING_ITEM ||
qualification.value_type == Item::VARBIN_ITEM))
{
delete value.string_value;
value.string_value= NULL;
}
else if (type == NDB_FIELD)
{
delete value.field_value;
value.field_value= NULL;
}
}
void Ndb_item::print(String* str)
{
switch(type) {
case(NDB_VALUE):
str->append("[#NDB_VALUE ");
switch(qualification.value_type) {
case (Item::INT_ITEM): {
String tmp;
tmp.set(value.int_value, &my_charset_bin);
str->append(tmp);
break;
}
case (Item::REAL_ITEM): {
String tmp;
tmp.set(value.real_value, 4 , &my_charset_bin);
str->append(tmp);
break;
}
case (Item::STRING_ITEM): {
str->append(value.string_value->s.ptr());
break;
}
case (Item::VARBIN_ITEM): {
str->append(value.string_value->s.ptr());
break;
}
case (Item::NULL_ITEM):
str->append("NULL");
break;
default:
str->append("ILLEGAL VALUE");
}
str->append("]");
break;
case(NDB_FIELD):
str->append("[#NDB_FIELD ");
str->append(value.field_value->field->field_name);
str->append("]");
break;
case(NDB_FUNCTION):
str->append("[#NDB_FUNCTION ");
switch(qualification.function_type) {
case(Item_func::UNKNOWN_FUNC): {
str->append("UNKNOWN]");
break;
}
case(Item_func::EQ_FUNC): {
str->append("=]");
break;
}
case(Item_func::NE_FUNC): {
str->append("!=]");
break;
}
case(Item_func::LT_FUNC): {
str->append("<]");
break;
}
case(Item_func::LE_FUNC): {
str->append("<=]");
break;
}
case(Item_func::GE_FUNC): {
str->append(">=]");
break;
}
case(Item_func::GT_FUNC): {
str->append(">]");
break;
}
case(Item_func::LIKE_FUNC): {
str->append("like]");
break;
}
case(Item_func::NOTLIKE_FUNC): {
str->append("notlike]");
break;
}
case(Item_func::ISNULL_FUNC): {
str->append("isnull]");
break;
}
case(Item_func::ISNOTNULL_FUNC): {
str->append("isnotnull]");
break;
}
case(Item_func::COND_AND_FUNC): {
str->append("and]");
break;
}
case(Item_func::COND_OR_FUNC): {
str->append("or]");
break;
}
default:
str->append("UNSUPPORTED]");
}
}
}
/*
Place holder for ha_ndbcluster thread specific data
*/
Thd_ndb::Thd_ndb()
{
ndb= new Ndb(g_ndb_cluster_connection, "");
@ -1701,7 +1903,7 @@ int ha_ndbcluster::full_table_scan(byte *buf)
op->readTuples(lm, 0, parallelism))
ERR_RETURN(trans->getNdbError());
m_active_cursor= op;
generate_scan_filter(m_cond_stack, op);
if((res= define_read_attrs(buf, op)))
DBUG_RETURN(res);
@ -2723,6 +2925,8 @@ int ha_ndbcluster::extra(enum ha_extra_function operation)
break;
case HA_EXTRA_RESET: /* Reset database to after open */
DBUG_PRINT("info", ("HA_EXTRA_RESET"));
DBUG_PRINT("info", ("Clearing condition stack"));
cond_clear();
break;
case HA_EXTRA_CACHE: /* Cash record in HA_rrnd() */
DBUG_PRINT("info", ("HA_EXTRA_CACHE"));
@ -2916,14 +3120,6 @@ int ha_ndbcluster::extra_opt(enum ha_extra_function operation, ulong cache_size)
}
int ha_ndbcluster::reset()
{
DBUG_ENTER("reset");
// Reset what?
DBUG_RETURN(1);
}
const char **ha_ndbcluster::bas_ext() const
{ static const char *ext[]= { ha_ndb_ext, NullS }; return ext; }
@ -3832,7 +4028,8 @@ ha_ndbcluster::ha_ndbcluster(TABLE *table_arg):
m_force_send(TRUE),
m_autoincrement_prefetch(32),
m_transaction_on(TRUE),
m_use_local_query_cache(FALSE)
m_use_local_query_cache(FALSE),
m_cond_stack(NULL)
{
int i;
@ -3877,6 +4074,10 @@ ha_ndbcluster::~ha_ndbcluster()
}
DBUG_ASSERT(m_active_trans == NULL);
// Discard the condition stack
DBUG_PRINT("info", ("Clearing condition stack"));
cond_clear();
DBUG_VOID_RETURN;
}
@ -5141,4 +5342,583 @@ ha_ndbcluster::setup_recattr(const NdbRecAttr* curr)
}
#endif
/*
Condition pushdown
*/
const
COND*
ha_ndbcluster::cond_push(const COND *cond)
{
THD *thd= current_thd;
Ndb_cond_stack *ndb_cond = new Ndb_cond_stack();
DBUG_ENTER("cond_push");
if (thd->variables.ndb_condition_pushdown)
{
DBUG_EXECUTE("where",print_where((COND *)cond, m_tabname););
if (m_cond_stack)
ndb_cond->next= m_cond_stack;
else
ndb_cond->next= NULL;
m_cond_stack= ndb_cond;
if (serialize_cond(cond, ndb_cond))
{
DBUG_RETURN(NULL);
}
else
{
cond_pop();
}
}
DBUG_RETURN(cond);
}
inline
void
ha_ndbcluster::cond_pop()
{
Ndb_cond_stack *ndb_cond_stack= m_cond_stack;
if (ndb_cond_stack)
{
m_cond_stack= ndb_cond_stack->next;
delete ndb_cond_stack;
}
};
void
ha_ndbcluster::cond_clear()
{
DBUG_ENTER("cond_clear");
while (m_cond_stack)
cond_pop();
DBUG_VOID_RETURN;
}
void ndb_serialize_cond(const Item *item, void *arg)
{
Ndb_cond_traverse_context *context= (Ndb_cond_traverse_context *) arg;
DBUG_ENTER("ndb_serialize_cond");
if (*context->supported_ptr)
{
Ndb_cond_stack *ndb_stack= context->stack_ptr;
Ndb_cond *prev_cond= context->cond_ptr;
Ndb_cond *curr_cond= context->cond_ptr= new Ndb_cond();
if (!ndb_stack->ndb_cond)
ndb_stack->ndb_cond= curr_cond;
curr_cond->prev= prev_cond;
if (prev_cond) prev_cond->next= curr_cond;
switch(item->type()) {
case(Item::FIELD_ITEM): {
Item_field *field_item= (Item_field *) item;
Field *field= field_item->field;
/*
Check that the field is part of the table of the handler
instance and that we expect a field with of this result type.
*/
if (context->table == field->table)
{
const NDBTAB *tab= (const NDBTAB *) context->ndb_table;
const NDBCOL *col= tab->getColumn(field->field_name);
DBUG_ASSERT(col);
DBUG_PRINT("info", ("FIELD_ITEM"));
DBUG_PRINT("info", ("table %s", tab->getName()));
DBUG_PRINT("info", ("column %s", field->field_name));
if(context->expecting(Item::FIELD_ITEM) &&
context->expecting_field_result(field->result_type()))
{
// Currently only support for unsigned int
if (field->result_type() == INT_RESULT &&
(field->type() != MYSQL_TYPE_LONG ||
!(field->flags & UNSIGNED_FLAG)))
*context->supported_ptr= FALSE;
else
{
curr_cond->ndb_item= new Ndb_item(field, col->getColumnNo());
context->dont_expect(Item::FIELD_ITEM);
context->expect_no_field_result();
break;
}
}
}
*context->supported_ptr= FALSE;
break;
}
case(Item::FUNC_ITEM): {
Item_func *func_item= (Item_func *) item;
context->expect_nothing();
switch(func_item->functype()) {
case(Item_func::UNKNOWN_FUNC): {
DBUG_PRINT("info", ("UNKNOWN_FUNC"));
DBUG_PRINT("info", ("value %d", func_item->val_int()));
break;
}
case(Item_func::EQ_FUNC): {
DBUG_PRINT("info", ("EQ_FUNC"));
curr_cond->ndb_item= new Ndb_item(func_item->functype());
context->expect(Item::FIELD_ITEM);
context->expect_field_result(INT_RESULT);
context->expect(Item::INT_ITEM);
break;
}
case(Item_func::NE_FUNC): {
DBUG_PRINT("info", ("NE_FUNC"));
curr_cond->ndb_item= new Ndb_item(func_item->functype());
context->expect(Item::FIELD_ITEM);
context->expect_field_result(INT_RESULT);
context->expect(Item::INT_ITEM);
break;
}
case(Item_func::LT_FUNC): {
DBUG_PRINT("info", ("LT_FUNC"));
curr_cond->ndb_item= new Ndb_item(func_item->functype());
context->expect(Item::FIELD_ITEM);
context->expect_field_result(INT_RESULT);
context->expect(Item::INT_ITEM);
break;
}
case(Item_func::LE_FUNC): {
DBUG_PRINT("info", ("LE_FUNC"));
curr_cond->ndb_item= new Ndb_item(func_item->functype());
context->expect(Item::FIELD_ITEM);
context->expect_field_result(INT_RESULT);
context->expect(Item::INT_ITEM);
break;
}
case(Item_func::GE_FUNC): {
DBUG_PRINT("info", ("GE_FUNC"));
curr_cond->ndb_item= new Ndb_item(func_item->functype());
context->expect(Item::FIELD_ITEM);
context->expect_field_result(INT_RESULT);
context->expect(Item::INT_ITEM);
break;
}
case(Item_func::GT_FUNC): {
DBUG_PRINT("info", ("GT_FUNC"));
curr_cond->ndb_item= new Ndb_item(func_item->functype());
context->expect(Item::FIELD_ITEM);
context->expect_field_result(INT_RESULT);
context->expect(Item::INT_ITEM);
break;
}
case(Item_func::LIKE_FUNC): {
DBUG_PRINT("info", ("LIKE_FUNC"));
curr_cond->ndb_item= new Ndb_item(func_item->functype());
context->expect(Item::STRING_ITEM);
*context->supported_ptr= FALSE; // Currently not supported
break;
}
case(Item_func::NOTLIKE_FUNC): {
DBUG_PRINT("info", ("NOTLIKE_FUNC"));
curr_cond->ndb_item= new Ndb_item(func_item->functype());
context->expect(Item::STRING_ITEM);
*context->supported_ptr= FALSE; // Currently not supported
break;
}
case(Item_func::ISNULL_FUNC): {
DBUG_PRINT("info", ("ISNULL_FUNC"));
curr_cond->ndb_item= new Ndb_item(func_item->functype());
context->expect(Item::FIELD_ITEM);
context->expect_field_result(STRING_RESULT);
context->expect_field_result(REAL_RESULT);
context->expect_field_result(INT_RESULT);
break;
}
case(Item_func::ISNOTNULL_FUNC): {
DBUG_PRINT("info", ("ISNOTNULL_FUNC"));
curr_cond->ndb_item= new Ndb_item(func_item->functype());
context->expect(Item::FIELD_ITEM);
context->expect_field_result(STRING_RESULT);
context->expect_field_result(REAL_RESULT);
context->expect_field_result(INT_RESULT);
break;
}
default: {
DBUG_PRINT("info", ("Found func_item of type %d",
func_item->functype()));
*context->supported_ptr= FALSE;
}
}
break;
}
case(Item::STRING_ITEM):
if (context->expecting(Item::STRING_ITEM))
{
char buff[256];
String str(buff,(uint32) sizeof(buff), system_charset_info);
str.length(0);
Item_string *string_item= (Item_string *) item;
DBUG_PRINT("info", ("STRING_ITEM"));
DBUG_PRINT("info", ("value \"%s\"",
string_item->val_str(&str)->ptr()));
NDB_ITEM_QUALIFICATION q;
q.value_type= Item::STRING_ITEM;
curr_cond->ndb_item= new Ndb_item(NDB_VALUE, q, item);
context->dont_expect(Item::STRING_ITEM);
}
else
*context->supported_ptr= FALSE;
break;
case(Item::INT_ITEM):
if (context->expecting(Item::INT_ITEM))
{
Item_int *int_item= (Item_int *) item;
DBUG_PRINT("info", ("INT_ITEM"));
DBUG_PRINT("info", ("value %d", int_item->value));
curr_cond->ndb_item= new Ndb_item(int_item->value);
context->dont_expect(Item::INT_ITEM);
}
else
*context->supported_ptr= FALSE;
break;
case(Item::REAL_ITEM):
if (context->expecting(Item::REAL_ITEM))
{
Item_real *real_item= (Item_real *) item;
DBUG_PRINT("info", ("REAL_ITEM %s"));
DBUG_PRINT("info", ("value %f", real_item->value));
curr_cond->ndb_item= new Ndb_item(real_item->value);
context->dont_expect(Item::REAL_ITEM);
*context->supported_ptr= FALSE; // Currently not supported
}
else
*context->supported_ptr= FALSE;
break;
case(Item::COND_ITEM): {
Item_cond *cond_item= (Item_cond *) item;
switch(cond_item->functype()) {
case(Item_func::COND_AND_FUNC):
DBUG_PRINT("info", ("COND_AND_FUNC"));
curr_cond->ndb_item= new Ndb_item(cond_item->functype());
break;
case(Item_func::COND_OR_FUNC):
DBUG_PRINT("info", ("COND_OR_FUNC"));
curr_cond->ndb_item= new Ndb_item(cond_item->functype());
break;
default:
DBUG_PRINT("info", ("COND_ITEM %d", cond_item->functype()));
*context->supported_ptr= FALSE;
break;
}
break;
}
default: {
DBUG_PRINT("info", ("Found item of type %d", item->type()));
*context->supported_ptr= FALSE;
}
}
}
DBUG_VOID_RETURN;
}
bool
ha_ndbcluster::serialize_cond(const COND *cond, Ndb_cond_stack *ndb_cond)
{
DBUG_ENTER("serialize_cond");
Item *item= (Item *) cond;
bool supported= TRUE;
Ndb_cond_traverse_context context(table, (void *)m_table,
&supported, ndb_cond);
item->traverse_cond(&ndb_serialize_cond, (void *) &context, Item::PREFIX);
DBUG_PRINT("info", ("The pushed condition is %ssupported", (supported)?"":"not "));
DBUG_RETURN(supported);
}
Ndb_cond *
ha_ndbcluster::build_scan_filter_predicate(Ndb_cond *cond,
NdbScanFilter *filter)
{
DBUG_ENTER("build_scan_filter_predicate");
switch(cond->ndb_item->type) {
case(NDB_FUNCTION): {
if (!cond->next)
break;
Ndb_item *a= cond->next->ndb_item;
switch(cond->ndb_item->qualification.function_type) {
case(Item_func::EQ_FUNC): {
if (!cond->next->next)
break;
Ndb_item *b= cond->next->next->ndb_item;
Ndb_item *value=
(a->type == NDB_VALUE)? a
: (b->type == NDB_VALUE)? b
: NULL;
Ndb_item *field=
(a->type == NDB_FIELD)? a
: (b->type == NDB_FIELD)? b
: NULL;
if (!value || !field) break;
DBUG_PRINT("info", ("Generating EQ filter"));
filter->eq(field->getFieldNo(),
(Uint32) value->getIntValue());
DBUG_RETURN(cond->next->next->next);
}
case(Item_func::NE_FUNC): {
if (!cond->next->next)
break;
Ndb_item *b= cond->next->next->ndb_item;
Ndb_item *value=
(a->type == NDB_VALUE)? a
: (b->type == NDB_VALUE)? b
: NULL;
Ndb_item *field=
(a->type == NDB_FIELD)? a
: (b->type == NDB_FIELD)? b
: NULL;
if (!value || !field) break;
DBUG_PRINT("info", ("Generating NE filter"));
filter->ne(field->getFieldNo(),
(Uint32) value->getIntValue());
DBUG_RETURN(cond->next->next->next);
}
case(Item_func::LT_FUNC): {
if (!cond->next->next)
break;
Ndb_item *b= cond->next->next->ndb_item;
Ndb_item *value=
(a->type == NDB_VALUE)? a
: (b->type == NDB_VALUE)? b
: NULL;
Ndb_item *field=
(a->type == NDB_FIELD)? a
: (b->type == NDB_FIELD)? b
: NULL;
if (!value || !field) break;
DBUG_PRINT("info", ("Generating LT filter"));
if (a == field)
filter->lt(field->getFieldNo(),
(Uint32) value->getIntValue());
else
filter->gt(field->getFieldNo(),
(Uint32) value->getIntValue());
DBUG_RETURN(cond->next->next->next);
}
case(Item_func::LE_FUNC): {
if (!cond->next->next)
break;
Ndb_item *b= cond->next->next->ndb_item;
Ndb_item *value=
(a->type == NDB_VALUE)? a
: (b->type == NDB_VALUE)? b
: NULL;
Ndb_item *field=
(a->type == NDB_FIELD)? a
: (b->type == NDB_FIELD)? b
: NULL;
if (!value || !field) break;
DBUG_PRINT("info", ("Generating LE filter"));
if (a == field)
filter->le(field->getFieldNo(),
(Uint32) value->getIntValue());
else
filter->ge(field->getFieldNo(),
(Uint32) value->getIntValue());
DBUG_RETURN(cond->next->next->next);
}
case(Item_func::GE_FUNC): {
if (!cond->next->next)
break;
Ndb_item *b= cond->next->next->ndb_item;
Ndb_item *value=
(a->type == NDB_VALUE)? a
: (b->type == NDB_VALUE)? b
: NULL;
Ndb_item *field=
(a->type == NDB_FIELD)? a
: (b->type == NDB_FIELD)? b
: NULL;
if (!value || !field) break;
DBUG_PRINT("info", ("Generating GE filter"));
if (a == field)
filter->ge(field->getFieldNo(),
(Uint32) value->getIntValue());
else
filter->le(field->getFieldNo(),
(Uint32) value->getIntValue());
DBUG_RETURN(cond->next->next->next);
}
case(Item_func::GT_FUNC): {
if (!cond->next->next)
break;
Ndb_item *b= cond->next->next->ndb_item;
Ndb_item *value=
(a->type == NDB_VALUE)? a
: (b->type == NDB_VALUE)? b
: NULL;
Ndb_item *field=
(a->type == NDB_FIELD)? a
: (b->type == NDB_FIELD)? b
: NULL;
if (!value || !field) break;
DBUG_PRINT("info", ("Generating GT filter"));
if (a == field)
filter->gt(field->getFieldNo(),
(Uint32) value->getIntValue());
else
filter->lt(field->getFieldNo(),
(Uint32) value->getIntValue());
DBUG_RETURN(cond->next->next->next);
}
case(Item_func::LIKE_FUNC): {
if (!cond->next->next)
break;
Ndb_item *b= cond->next->next->ndb_item;
Ndb_item *value=
(a->type == NDB_VALUE)? a
: (b->type == NDB_VALUE)? b
: NULL;
Ndb_item *field=
(a->type == NDB_FIELD)? a
: (b->type == NDB_FIELD)? b
: NULL;
if (!value || !field) break;
if (value->qualification.value_type != Item::STRING_ITEM) break;
String *str= value->getStringValue();
DBUG_PRINT("info", ("Generating LIKE filter: like(%d,%s,%d)", field->getFieldNo(), str->ptr(), str->length()));
filter->like(field->getFieldNo(),
str->ptr(), str->length(), TRUE);
DBUG_RETURN(cond->next->next->next);
}
case(Item_func::NOTLIKE_FUNC): {
if (!cond->next->next)
break;
Ndb_item *b= cond->next->next->ndb_item;
Ndb_item *value=
(a->type == NDB_VALUE)? a
: (b->type == NDB_VALUE)? b
: NULL;
Ndb_item *field=
(a->type == NDB_FIELD)? a
: (b->type == NDB_FIELD)? b
: NULL;
if (!value || !field) break;
if (value->qualification.value_type != Item::STRING_ITEM) break;
String *str= value->getStringValue();
DBUG_PRINT("info", ("Generating NOTLIKE filter: notlike(%d,%s,%d)", field->getFieldNo(), str->ptr(), str->length()));
filter->notlike(field->getFieldNo(),
str->ptr(), str->length());
DBUG_RETURN(cond->next->next->next);
}
case(Item_func::ISNULL_FUNC):
if (a->type == NDB_FIELD) {
DBUG_PRINT("info", ("Generating ISNULL filter"));
filter->isnull(a->getFieldNo());
}
DBUG_RETURN(cond->next->next);
case(Item_func::ISNOTNULL_FUNC): {
if (a->type == NDB_FIELD) {
DBUG_PRINT("info", ("Generating ISNOTNULL filter"));
filter->isnotnull(a->getFieldNo());
}
DBUG_RETURN(cond->next->next);
}
default:
break;
}
break;
}
default:
break;
}
DBUG_PRINT("info", ("Found illegal condition"));
DBUG_RETURN(NULL);
}
Ndb_cond *
ha_ndbcluster::build_scan_filter_group(Ndb_cond *cond, NdbScanFilter *filter)
{
DBUG_ENTER("build_scan_filter_group");
switch(cond->ndb_item->type) {
case(NDB_FUNCTION):
switch(cond->ndb_item->qualification.function_type) {
case(Item_func::COND_AND_FUNC): {
DBUG_PRINT("info", ("Generating AND group"));
filter->begin(NdbScanFilter::AND);
cond= cond->next;
cond= build_scan_filter_group(cond, filter);
cond= build_scan_filter_group(cond, filter);
filter->end();
break;
}
case(Item_func::COND_OR_FUNC): {
DBUG_PRINT("info", ("Generating OR group"));
filter->begin(NdbScanFilter::OR);
cond= cond->next;
cond= build_scan_filter_group(cond, filter);
cond= build_scan_filter_group(cond, filter);
filter->end();
break;
}
default:
cond= build_scan_filter_predicate(cond, filter);
}
break;
default: {
DBUG_PRINT("info", ("Illegal scan filter"));
}
}
DBUG_RETURN(cond);
}
void
ha_ndbcluster::build_scan_filter(Ndb_cond *cond, NdbScanFilter *filter)
{
bool simple_cond= TRUE;
DBUG_ENTER("build_scan_filter");
switch(cond->ndb_item->type) {
case(Item_func::COND_AND_FUNC):
simple_cond= FALSE;
break;
case(Item_func::COND_OR_FUNC):
simple_cond= FALSE;
break;
default:
break;
}
if (simple_cond) filter->begin();
build_scan_filter_group(cond, filter);
if (simple_cond) filter->end();
DBUG_VOID_RETURN;
}
void
ha_ndbcluster::generate_scan_filter(Ndb_cond_stack *ndb_cond_stack,
NdbScanOperation *op)
{
DBUG_ENTER("generate_scan_filter");
if (ndb_cond_stack)
{
NdbScanFilter filter(op);
bool multiple_cond= FALSE;
// Wrap an AND group around multiple conditions
if (ndb_cond_stack->next) {
multiple_cond= TRUE;
filter.begin();
}
for (Ndb_cond_stack *stack= ndb_cond_stack;
(stack);
stack= stack->next)
{
build_scan_filter(stack->ndb_cond, &filter);
}
if (multiple_cond) filter.end();
}
else
{
DBUG_PRINT("info", ("Empty stack"));
}
DBUG_VOID_RETURN;
}
#endif /* HAVE_NDBCLUSTER_DB */

185
sql/ha_ndbcluster.h
View File

@ -32,6 +32,7 @@ class NdbOperation; // Forward declaration
class NdbConnection; // Forward declaration
class NdbRecAttr; // Forward declaration
class NdbScanOperation;
class NdbScanFilter;
class NdbIndexScanOperation;
class NdbBlob;
@ -60,6 +61,145 @@ typedef struct st_ndbcluster_share {
uint table_name_length,use_count;
} NDB_SHARE;
typedef enum ndb_item_type {
NDB_VALUE = 0, // Qualified more with Item::Type
NDB_FIELD = 1, // Qualified from table definition
NDB_FUNCTION = 2 // Qualified from Item_func::Functype
} NDB_ITEM_TYPE;
typedef union ndb_item_qualification {
Item::Type value_type;
enum_field_types field_type; // Instead of Item::FIELD_ITEM
Item_func::Functype function_type; // Instead of Item::FUNC_ITEM
} NDB_ITEM_QUALIFICATION;
class Ndb_item_string_value {
public:
String s;
CHARSET_INFO *c;
};
typedef struct ndb_item_field_value {
Field* field;
int column_no;
} NDB_ITEM_FIELD_VALUE;
typedef union ndb_item_value {
longlong int_value;
double real_value;
Ndb_item_string_value *string_value;
NDB_ITEM_FIELD_VALUE *field_value;
} NDB_ITEM_VALUE;
class Ndb_item {
public:
Ndb_item(NDB_ITEM_TYPE item_type,
NDB_ITEM_QUALIFICATION item_qualification,
const Item *item_value);
Ndb_item(longlong int_value);
Ndb_item(double real_value);
Ndb_item();
Ndb_item(Field *field, int column_no);
Ndb_item(Item_func::Functype func_type);
~Ndb_item();
void print(String *str);
// Getters and Setters
longlong getIntValue() { return value.int_value; };
double getRealValue() { return value.real_value; };
String * getStringValue() { return &value.string_value->s; };
CHARSET_INFO * getStringCharset() { return value.string_value->c; };
Field * getField() { return value.field_value->field; };
int getFieldNo() { return value.field_value->column_no; };
public:
NDB_ITEM_TYPE type;
NDB_ITEM_QUALIFICATION qualification;
private:
NDB_ITEM_VALUE value;
};
class Ndb_cond {
public:
Ndb_cond() : ndb_item(NULL), next(NULL), prev(NULL) {};
~Ndb_cond()
{
if (ndb_item) delete ndb_item;
ndb_item= NULL;
if (next) delete next;
next= prev= NULL;
};
Ndb_item *ndb_item;
Ndb_cond *next;
Ndb_cond *prev;
};
class Ndb_cond_stack {
public:
Ndb_cond_stack() : ndb_cond(NULL), next(NULL) {};
~Ndb_cond_stack()
{
if (ndb_cond) delete ndb_cond;
ndb_cond= NULL;
next= NULL;
};
Ndb_cond *ndb_cond;
Ndb_cond_stack *next;
};
class Ndb_cond_traverse_context {
public:
Ndb_cond_traverse_context(TABLE *tab, void* ndb_tab,
bool *supported, Ndb_cond_stack* stack)
: table(tab), ndb_table(ndb_tab),
supported_ptr(supported), stack_ptr(stack), cond_ptr(NULL),
expect_mask(0), expect_field_result_mask(0)
{
if (stack)
cond_ptr= stack->ndb_cond;
};
void expect(Item::Type type)
{
expect_mask|= (1 << type);
};
void dont_expect(Item::Type type)
{
expect_mask&= ~(1 << type);
};
bool expecting(Item::Type type)
{
return (expect_mask & (1 << type));
};
void expect_nothing()
{
expect_mask= 0;
};
void expect_field_result(Item_result result)
{
expect_field_result_mask|= (1 << result);
};
bool expecting_field_result(Item_result result)
{
return (expect_field_result_mask & (1 << result));
};
void expect_no_field_result()
{
expect_field_result_mask= 0;
};
TABLE* table;
void* ndb_table;
bool *supported_ptr;
Ndb_cond_stack* stack_ptr;
Ndb_cond* cond_ptr;
private:
uint expect_mask;
uint expect_field_result_mask;
};
/*
Place holder for ha_ndbcluster thread specific data
*/
@ -122,7 +262,6 @@ class ha_ndbcluster: public handler
void info(uint);
int extra(enum ha_extra_function operation);
int extra_opt(enum ha_extra_function operation, ulong cache_size);
int reset();
int external_lock(THD *thd, int lock_type);
int start_stmt(THD *thd);
const char * table_type() const;
@ -152,6 +291,13 @@ class ha_ndbcluster: public handler
static Thd_ndb* seize_thd_ndb();
static void release_thd_ndb(Thd_ndb* thd_ndb);
/*
Condition pushdown
*/
const COND *cond_push(const COND *cond);
void cond_pop();
uint8 table_cache_type();
private:
@ -214,9 +360,32 @@ class ha_ndbcluster: public handler
int write_ndb_file();
private:
int check_ndb_connection();
void set_rec_per_key();
void records_update();
void no_uncommitted_rows_execute_failure();
void no_uncommitted_rows_update(int);
void no_uncommitted_rows_init(THD *);
void no_uncommitted_rows_reset(THD *);
/*
Condition Pushdown to Handler (CPDH), private methods
*/
void cond_clear();
bool serialize_cond(const COND *cond, Ndb_cond_stack *ndb_cond);
Ndb_cond * build_scan_filter_predicate(Ndb_cond* cond,
NdbScanFilter* filter);
Ndb_cond * build_scan_filter_group(Ndb_cond* cond,
NdbScanFilter* filter);
void build_scan_filter(Ndb_cond* cond, NdbScanFilter* filter);
void generate_scan_filter(Ndb_cond_stack* cond_stack,
NdbScanOperation* op);
friend int execute_commit(ha_ndbcluster*, NdbConnection*);
friend int execute_no_commit(ha_ndbcluster*, NdbConnection*);
friend int execute_no_commit_ie(ha_ndbcluster*, NdbConnection*);
NdbConnection *m_active_trans;
NdbScanOperation *m_active_cursor;
Ndb *m_ndb;
@ -254,7 +423,7 @@ class ha_ndbcluster: public handler
ha_rows m_autoincrement_prefetch;
bool m_transaction_on;
bool m_use_local_query_cache;
Ndb_cond_stack *m_cond_stack;
bool m_disable_multi_read;
byte *m_multi_range_result_ptr;
uint m_multi_range_defined_count;
@ -263,16 +432,6 @@ class ha_ndbcluster: public handler
byte *m_multi_range_cursor_result_ptr;
int setup_recattr(const NdbRecAttr*);
void set_rec_per_key();
void records_update();
void no_uncommitted_rows_execute_failure();
void no_uncommitted_rows_update(int);
void no_uncommitted_rows_init(THD *);
void no_uncommitted_rows_reset(THD *);
friend int execute_no_commit(ha_ndbcluster*, NdbConnection*);
friend int execute_commit(ha_ndbcluster*, NdbConnection*);
friend int execute_no_commit_ie(ha_ndbcluster*, NdbConnection*);
};
bool ndbcluster_init(void);

9
sql/handler.h
View File

@ -264,6 +264,9 @@ typedef struct st_table TABLE;
struct st_foreign_key_info;
typedef struct st_foreign_key_info FOREIGN_KEY_INFO;
/* Forward declaration for Condition Pushdown to Handler (CPDH) */
typedef struct Item COND;
typedef struct st_ha_check_opt
{
ulong sort_buffer_size;
@ -575,6 +578,12 @@ public:
{
return memcmp(ref1, ref2, ref_length);
}
/*
Condition pushdown to storage engines
*/
virtual const COND *cond_push(const COND *cond) { return cond; };
virtual void cond_pop() { return; };
};
/* Some extern variables used with handlers */

13
sql/item.h
View File

@ -113,6 +113,8 @@ public:
typedef bool (Item::*Item_processor)(byte *arg);
typedef Item* (Item::*Item_transformer) (byte *arg);
typedef void (*Item_cond_traverser) (const Item *item, void *arg);
class Item {
Item(const Item &); /* Prevent use of these */
void operator=(Item &);
@ -124,7 +126,7 @@ public:
static void operator delete(void *ptr,size_t size, MEM_ROOT *mem_root)
{ TRASH(ptr, size); }
enum Type {FIELD_ITEM, FUNC_ITEM, SUM_FUNC_ITEM, STRING_ITEM,
enum Type {FIELD_ITEM= 0, FUNC_ITEM, SUM_FUNC_ITEM, STRING_ITEM,
INT_ITEM, REAL_ITEM, NULL_ITEM, VARBIN_ITEM,
COPY_STR_ITEM, FIELD_AVG_ITEM, DEFAULT_VALUE_ITEM,
PROC_ITEM,COND_ITEM, REF_ITEM, FIELD_STD_ITEM,
@ -134,6 +136,8 @@ public:
enum cond_result { COND_UNDEF,COND_OK,COND_TRUE,COND_FALSE };
enum traverse_order { POSTFIX, PREFIX };
/*
str_values's main purpose is to be used to cache the value in
save_in_field
@ -315,6 +319,13 @@ public:
return (this->*transformer)(arg);
}
virtual void traverse_cond(Item_cond_traverser traverser,
void *arg,
traverse_order order = POSTFIX)
{
(*traverser)(this, arg);
}
virtual bool remove_dependence_processor(byte * arg) { return 0; }
virtual bool remove_fixed(byte * arg) { fixed= 0; return 0; }
virtual bool cleanup_processor(byte *arg);

14
sql/item_cmpfunc.cc
View File

@ -2037,6 +2037,20 @@ Item *Item_cond::transform(Item_transformer transformer, byte *arg)
return Item_func::transform(transformer, arg);
}
void Item_cond::traverse_cond(Item_cond_traverser traverser,
void *arg,
traverse_order order)
{
List_iterator<Item> li(list);
Item *item;
if (order == PREFIX) (*traverser)(this, arg);
while ((item= li++))
{
item->traverse_cond(traverser, arg, order);
}
if (order == POSTFIX) (*traverser)(this, arg);
}
void Item_cond::split_sum_func(THD *thd, Item **ref_pointer_array,
List<Item> &fields)

3
sql/item_cmpfunc.h
View File

@ -965,6 +965,9 @@ public:
void copy_andor_arguments(THD *thd, Item_cond *item);
bool walk(Item_processor processor, byte *arg);
Item *transform(Item_transformer transformer, byte *arg);
void traverse_cond(Item_cond_traverser,
void *arg,
traverse_order order = POSTFIX);
void neg_arguments(THD *thd);
};

16
sql/item_func.cc
View File

@ -342,6 +342,22 @@ bool Item_func::walk (Item_processor processor, byte *argument)
return (this->*processor)(argument);
}
void Item_func::traverse_cond(Item_cond_traverser traverser,
void *argument,
traverse_order order)
{
if (arg_count)
{
Item **arg,**arg_end;
if (order == PREFIX) (traverser)(this, argument);
for (arg= args, arg_end= args+arg_count; arg != arg_end; arg++)
{
(*arg)->traverse_cond(traverser, argument, order);
}
}
if (order == POSTFIX) (traverser)(this, argument);
}
/*
Transform an Item_func object with a transformer callback function

3
sql/item_func.h
View File

@ -154,6 +154,9 @@ public:
uint flags= 0);
bool walk(Item_processor processor, byte *arg);
Item *transform(Item_transformer transformer, byte *arg);
void traverse_cond(Item_cond_traverser traverser,
void * arg,
traverse_order order = POSTFIX);
};

7
sql/mysqld.cc
View File

@ -4093,6 +4093,7 @@ enum options_mysqld
OPT_INNODB, OPT_ISAM,
OPT_NDBCLUSTER, OPT_NDB_CONNECTSTRING, OPT_NDB_USE_EXACT_COUNT,
OPT_NDB_FORCE_SEND, OPT_NDB_AUTOINCREMENT_PREFETCH_SZ,
OPT_NDB_CONDITION_PUSHDOWN,
OPT_SKIP_SAFEMALLOC,
OPT_TEMP_POOL, OPT_TX_ISOLATION,
OPT_SKIP_STACK_TRACE, OPT_SKIP_SYMLINKS,
@ -4547,6 +4548,12 @@ Disable with --skip-ndbcluster (will save memory).",
(gptr*) &opt_ndbcluster, (gptr*) &opt_ndbcluster, 0, GET_BOOL, NO_ARG,
OPT_NDBCLUSTER_DEFAULT, 0, 0, 0, 0, 0},
#ifdef HAVE_NDBCLUSTER_DB
{"ndb-condition-pushdown",
OPT_NDB_CONDITION_PUSHDOWN,
"Push supported query conditions to the ndbcluster storage engine.",
(gptr*) &global_system_variables.ndb_condition_pushdown,
(gptr*) &global_system_variables.ndb_condition_pushdown,
0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
{"ndb-connectstring", OPT_NDB_CONNECTSTRING,
"Connect string for ndbcluster.",
(gptr*) &ndbcluster_connectstring, (gptr*) &ndbcluster_connectstring,

6
sql/set_var.cc
View File

@ -388,6 +388,9 @@ sys_ndb_use_exact_count("ndb_use_exact_count",
sys_var_thd_bool
sys_ndb_use_transactions("ndb_use_transactions",
&SV::ndb_use_transactions);
sys_var_thd_bool
sys_ndb_condition_pushdown("ndb_condition_pushdown",
&SV::ndb_condition_pushdown);
// ndb server global variable settings
// none
#endif
@ -654,6 +657,7 @@ sys_var *sys_variables[]=
&sys_ndb_force_send,
&sys_ndb_use_exact_count,
&sys_ndb_use_transactions,
&sys_ndb_condition_pushdown,
#endif
&sys_unique_checks,
&sys_updatable_views_with_limit,
@ -824,6 +828,8 @@ struct show_var_st init_vars[]= {
{sys_ndb_force_send.name, (char*) &sys_ndb_force_send, SHOW_SYS},
{sys_ndb_use_exact_count.name,(char*) &sys_ndb_use_exact_count, SHOW_SYS},
{sys_ndb_use_transactions.name,(char*) &sys_ndb_use_transactions, SHOW_SYS},
{sys_ndb_condition_pushdown.name, (char*) &sys_ndb_condition_pushdown,
SHOW_SYS},
#endif
{sys_net_buffer_length.name,(char*) &sys_net_buffer_length, SHOW_SYS},
{sys_net_read_timeout.name, (char*) &sys_net_read_timeout, SHOW_SYS},

1
sql/sql_class.h
View File

@ -436,6 +436,7 @@ struct system_variables
my_bool ndb_force_send;
my_bool ndb_use_exact_count;
my_bool ndb_use_transactions;
my_bool ndb_condition_pushdown;
#endif /* HAVE_NDBCLUSTER_DB */
my_bool old_passwords;

3
sql/sql_select.cc
View File

@ -5269,6 +5269,7 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
if (!(tmp= add_found_match_trig_cond(first_inner_tab, tmp, 0)))
DBUG_RETURN(1);
tab->select_cond=sel->cond=tmp;
tab->table->file->cond_push(tmp); // Push condition to handler
}
else
tab->select_cond= sel->cond= NULL;
@ -5390,6 +5391,8 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
join->thd->memdup((gptr) sel, sizeof(SQL_SELECT));
tab->cache.select->cond=tmp;
tab->cache.select->read_tables=join->const_table_map;
if (tmp != tab->select_cond)
tab->table->file->cond_push(tmp); // Push condition to handler
}
}
}