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Fix for bug#25821 Excessive partition pruning for multi-range index scan in NDB API: don't set distribution key if multi_range

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unknown 2007-02-06 23:06:58 +01:00
parent c9950f2694
commit ba8a684dcb
7 changed files with 29 additions and 6 deletions
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7
mysql-test/r/ndb_read_multi_range.result
View file

@ -398,3 +398,10 @@ INSERT INTO t1 VALUES (1,1),(2,2),(3,3);
UPDATE t1 SET var2 = 9 WHERE var1 IN(1,2,3);
DROP TRIGGER testtrigger;
DROP TABLE t1, t2;
create table t2 (a int, b int, primary key (a), key ab (a,b)) engine=ndbcluster;
insert into t2 values (1,1), (10,10);
select * from t2 use index (ab) where a in(1,10) order by a;
a b
1 1
10 10
drop table t2;

9
mysql-test/t/ndb_read_multi_range.test
View file

@ -282,3 +282,12 @@ UPDATE t1 SET var2 = 9 WHERE var1 IN(1,2,3);
DROP TRIGGER testtrigger;
DROP TABLE t1, t2;
#bug#25821
create table t2 (a int, b int, primary key (a), key ab (a,b)) engine=ndbcluster;
insert into t2 values (1,1), (10,10);
select * from t2 use index (ab) where a in(1,10) order by a;
drop table t2;

6
ndb/include/ndbapi/NdbIndexScanOperation.hpp
View file

@ -64,12 +64,14 @@ public:
bool order_by,
bool order_desc = false,
bool read_range_no = false,
bool keyinfo = false) {
bool keyinfo = false,
bool multi_range = false) {
Uint32 scan_flags =
(SF_OrderBy & -(Int32)order_by) |
(SF_Descending & -(Int32)order_desc) |
(SF_ReadRangeNo & -(Int32)read_range_no) |
(SF_KeyInfo & -(Int32)keyinfo);
(SF_KeyInfo & -(Int32)keyinfo) |
(SF_MultiRange & -(Int32)multi_range);
return readTuples(lock_mode, scan_flags, parallel, batch);
}

5
ndb/include/ndbapi/NdbScanOperation.hpp
View file

@ -45,6 +45,7 @@ public:
SF_OrderBy = (1 << 24), // index scan in order
SF_Descending = (2 << 24), // index scan in descending order
SF_ReadRangeNo = (4 << 24), // enable @ref get_range_no
SF_MultiRange = (8 << 24), // scan is part of multi-range scan
SF_KeyInfo = 1 // request KeyInfo to be sent back
};
@ -71,7 +72,8 @@ public:
*/
#ifdef ndb_readtuples_impossible_overload
int readTuples(LockMode lock_mode = LM_Read,
Uint32 batch = 0, Uint32 parallel = 0, bool keyinfo = false);
Uint32 batch = 0, Uint32 parallel = 0,
bool keyinfo = false, bool multi_range);
#endif
inline int readTuples(int parallell){
@ -263,6 +265,7 @@ protected:
bool m_descending;
Uint32 m_read_range_no;
NdbRecAttr *m_curr_row; // Pointer to last returned row
bool m_multi_range; // Mark if operation is part of multi-range scan
};
inline

5
ndb/src/ndbapi/NdbScanOperation.cpp
View file

@ -1189,7 +1189,7 @@ NdbIndexScanOperation::setBound(const NdbColumnImpl* tAttrInfo,
* so it's safe to use [tIndexAttrId]
* (instead of looping as is NdbOperation::equal_impl)
*/
if(type == BoundEQ && tDistrKey)
if(type == BoundEQ && tDistrKey && !m_multi_range)
{
theNoOfTupKeyLeft--;
return handle_distribution_key((Uint64*)aValue, sizeInWords);
@ -1250,7 +1250,8 @@ NdbIndexScanOperation::readTuples(LockMode lm,
const bool order_by = scan_flags & SF_OrderBy;
const bool order_desc = scan_flags & SF_Descending;
const bool read_range_no = scan_flags & SF_ReadRangeNo;
m_multi_range = scan_flags & SF_MultiRange;
int res = NdbScanOperation::readTuples(lm, scan_flags, parallel, batch);
if(!res && read_range_no)
{

2
sql/ha_ndbcluster.cc
View file

@ -6348,7 +6348,7 @@ ha_ndbcluster::read_multi_range_first(KEY_MULTI_RANGE **found_range_p,
}
else if ((scanOp= m_active_trans->getNdbIndexScanOperation(idx, tab))
&&!scanOp->readTuples(lm, 0, parallelism, sorted,
FALSE, TRUE, need_pk)
FALSE, TRUE, need_pk, TRUE)
&&!generate_scan_filter(m_cond_stack, scanOp)
&&!define_read_attrs(end_of_buffer-reclength, scanOp))
{

1
sql/ha_ndbcluster.h
View file

@ -661,6 +661,7 @@ private:
const NdbOperation *first,
const NdbOperation *last,
uint errcode);
bool key_fields_not_in_write_set(THD *thd, const KEY* key_info);
int peek_indexed_rows(const byte *record, bool check_pk);
int unique_index_read(const byte *key, uint key_len,
byte *buf);