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MCOL-4753 Performance problem in Typeless join

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This commit is contained in:
Alexander Barkov
2021-06-09 09:56:20 +04:00
committed by Roman Nozdrin
parent c6d0b46bc6
commit b3d6f62964
5 changed files with 104 additions and 172 deletions
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209
utils/joiner/tuplejoiner.cpp
View File

@ -1321,58 +1321,11 @@ public:
};
TypelessData makeTypelessKey(const Row& r, const vector<uint32_t>& keyCols,
uint32_t keylen, FixedAllocator* fa)
{
TypelessData ret;
uint32_t off = 0, i;
execplan::CalpontSystemCatalog::ColDataType type;
ret.data = (uint8_t*) fa->allocate();
for (i = 0; i < keyCols.size(); i++)
{
type = r.getColTypes()[keyCols[i]];
if (type == CalpontSystemCatalog::VARCHAR ||
type == CalpontSystemCatalog::CHAR ||
type == CalpontSystemCatalog::TEXT)
{
// this is a string, copy a normalized version
const uint8_t* str = r.getStringPointer(keyCols[i]);
uint32_t width = r.getStringLength(keyCols[i]);
if (TypelessDataStringEncoder(str, width).store(ret.data, off, keylen))
goto toolong;
}
else if (r.isUnsigned(keyCols[i]))
{
if (off + 8 > keylen)
goto toolong;
*((uint64_t*) &ret.data[off]) = r.getUintField(keyCols[i]);
off += 8;
}
else
{
if (off + 8 > keylen)
goto toolong;
*((int64_t*) &ret.data[off]) = r.getIntField(keyCols[i]);
off += 8;
}
}
ret.len = off;
fa->truncateBy(keylen - off);
return ret;
toolong:
fa->truncateBy(keylen);
ret.len = 0;
return ret;
}
uint32 TypelessData::hash(const RowGroup& r,
const std::vector<uint32_t>& keyCols) const
{
if (mRowPtr)
return mRowPtr->hashTypeless(keyCols);
TypelessDataDecoder decoder(*this);
datatypes::MariaDBHasher hasher;
for (uint32_t i = 0; i < keyCols.size(); i++)
@ -1398,9 +1351,59 @@ uint32 TypelessData::hash(const RowGroup& r,
}
int TypelessData::cmpToRow(const RowGroup& r,
const std::vector<uint32_t>& keyCols,
const rowgroup::Row &row) const
{
TypelessDataDecoder a(*this);
for (uint32_t i = 0; i < keyCols.size(); i++)
{
switch (r.getColTypes()[keyCols[i]])
{
case CalpontSystemCatalog::VARCHAR:
case CalpontSystemCatalog::CHAR:
case CalpontSystemCatalog::TEXT:
{
datatypes::Charset cs(*const_cast<RowGroup&>(r).getCharset(keyCols[i]));
ConstString ta = a.scanString();
ConstString tb = row.getConstString(keyCols[i]);
if (int rc= cs.strnncollsp(ta, tb))
return rc;
break;
}
default:
{
ConstString ta = a.scanGeneric(datatypes::MAXLEGACYWIDTH);
if (r.isUnsigned(keyCols[i]))
{
uint64_t tb = row.getUintField(keyCols[i]);
if (int rc= memcmp(ta.str(), &tb , datatypes::MAXLEGACYWIDTH))
return rc;
}
else
{
int64_t tb = row.getIntField(keyCols[i]);
if (int rc= memcmp(ta.str(), &tb , datatypes::MAXLEGACYWIDTH))
return rc;
}
break;
}
}
}
return 0; // Equal
}
int TypelessData::cmp(const RowGroup& r, const std::vector<uint32_t>& keyCols,
const TypelessData &da, const TypelessData &db)
{
idbassert((da.mRowPtr == nullptr) + (db.mRowPtr == nullptr) > 0);
if (da.mRowPtr)
return -db.cmpToRow(r, keyCols, da.mRowPtr[0]);
if (db.mRowPtr)
return da.cmpToRow(r, keyCols, db.mRowPtr[0]);
TypelessDataDecoder a(da);
TypelessDataDecoder b(db);
@ -1543,114 +1546,6 @@ toolong:
return ret;
}
TypelessData makeTypelessKey(const Row& r, const vector<uint32_t>& keyCols, PoolAllocator* fa,
const rowgroup::RowGroup& otherSideRG, const std::vector<uint32_t>& otherKeyCols)
{
TypelessData ret;
uint32_t off = 0, i;
execplan::CalpontSystemCatalog::ColDataType type;
uint32_t keylen = 0;
/* get the length of the normalized key... */
for (i = 0; i < keyCols.size(); i++)
{
type = r.getColTypes()[keyCols[i]];
if (r.getColType(keyCols[i]) == CalpontSystemCatalog::LONGDOUBLE
&& otherSideRG.getColType(otherKeyCols[i]) == CalpontSystemCatalog::LONGDOUBLE)
{
keylen += sizeof(long double);
}
else if (r.isCharType(keyCols[i]))
keylen += r.getStringLength(keyCols[i]) + 2;
else
keylen += 8;
}
ret.data = (uint8_t*) fa->allocate(keylen);
for (i = 0; i < keyCols.size(); i++)
{
type = r.getColTypes()[keyCols[i]];
if (type == CalpontSystemCatalog::VARCHAR ||
type == CalpontSystemCatalog::CHAR ||
type == CalpontSystemCatalog::TEXT)
{
// this is a string, copy a normalized version
const uint8_t* str = r.getStringPointer(keyCols[i]);
uint32_t width = r.getStringLength(keyCols[i]);
TypelessDataStringEncoder(str, width).store(ret.data, off, keylen);
}
else if (type == CalpontSystemCatalog::LONGDOUBLE)
{
// Small side is a long double. Since CS can't store larger than DOUBLE,
// we need to convert to whatever type large side is -- double or int64
long double keyld = r.getLongDoubleField(keyCols[i]);
switch (otherSideRG.getColType(otherKeyCols[i]))
{
case CalpontSystemCatalog::DOUBLE:
case CalpontSystemCatalog::UDOUBLE:
case CalpontSystemCatalog::FLOAT:
case CalpontSystemCatalog::UFLOAT:
{
if (keyld > MAX_DOUBLE || keyld < MIN_DOUBLE)
{
ret.len = 0;
return ret;
}
else
{
double d = (double)keyld;
*((int64_t*) &ret.data[off]) = *(int64_t*)&d;
off += 8;
}
break;
}
case CalpontSystemCatalog::LONGDOUBLE:
{
*((long double*) &ret.data[off]) = keyld;
off += sizeof(long double);
break;
}
default:
{
if (r.isUnsigned(keyCols[i]) && keyld > MAX_UBIGINT)
{
ret.len = 0;
return ret;
}
else if (keyld > MAX_BIGINT || keyld < MIN_BIGINT)
{
ret.len = 0;
return ret;
}
else
{
*((int64_t*) &ret.data[off]) = (int64_t)keyld;
off += 8;
}
break;
}
}
}
else if (r.isUnsigned(keyCols[i]))
{
*((uint64_t*)&ret.data[off]) = r.getUintField(keyCols[i]);
off += 8;
}
else
{
*((int64_t*)&ret.data[off]) = r.getIntField(keyCols[i]);
off += 8;
}
}
assert(off == keylen);
ret.len = off;
return ret;
}
uint64_t getHashOfTypelessKey(const Row& r, const vector<uint32_t>& keyCols, uint32_t seed)
{

11
utils/joiner/tuplejoiner.h
View File

@ -49,8 +49,10 @@ class TypelessData
public:
uint8_t* data;
uint32_t len;
const rowgroup::Row *mRowPtr;
TypelessData() : data(NULL), len(0) { }
TypelessData() : data(NULL), len(0), mRowPtr(nullptr) { }
TypelessData(const rowgroup::Row *rowPtr) : data(NULL), len(0), mRowPtr(rowPtr) { }
inline bool operator==(const TypelessData&) const;
void serialize(messageqcpp::ByteStream&) const;
void deserialize(messageqcpp::ByteStream&, utils::FixedAllocator&);
@ -60,6 +62,8 @@ public:
static int cmp(const rowgroup::RowGroup&, const std::vector<uint32_t>& keyCols,
const TypelessData &a,
const TypelessData &b);
int cmpToRow(const rowgroup::RowGroup& r, const std::vector<uint32_t>& keyCols,
const rowgroup::Row &db) const;
};
inline bool TypelessData::operator==(const TypelessData& t) const
@ -88,15 +92,10 @@ public:
* key is limited by keylen. Keys that are longer are assigned a length of 0 on return,
* signifying that it shouldn't match anything.
*/
extern TypelessData makeTypelessKey(const rowgroup::Row&,
const std::vector<uint32_t>&, uint32_t keylen, utils::FixedAllocator* fa);
// MCOL-1822 SUM/AVG as long double: pass in RG and col so we can determine type conversion
extern TypelessData makeTypelessKey(const rowgroup::Row&,
const std::vector<uint32_t>&, uint32_t keylen, utils::FixedAllocator* fa,
const rowgroup::RowGroup&, const std::vector<uint32_t>&);
extern TypelessData makeTypelessKey(const rowgroup::Row&,
const std::vector<uint32_t>&, utils::PoolAllocator* fa,
const rowgroup::RowGroup&, const std::vector<uint32_t>&);
extern uint64_t getHashOfTypelessKey(const rowgroup::Row&, const std::vector<uint32_t>&,
uint32_t seed = 0);

40
utils/rowgroup/rowgroup.h
View File

@ -559,6 +559,14 @@ public:
inline uint64_t hash(uint32_t lastCol) const; // generates a hash for cols [0-lastCol]
inline uint64_t hash() const; // generates a hash for all cols
inline void colUpdateMariaDBHasher(datatypes::MariaDBHasher &hasher, uint32_t col) const;
inline void colUpdateMariaDBHasherTypeless(datatypes::MariaDBHasher &hasher, uint32_t col) const;
inline uint64_t hashTypeless(const std::vector<uint32_t>& keyCols) const
{
datatypes::MariaDBHasher h;
for (uint32_t i = 0; i < keyCols.size(); i++)
colUpdateMariaDBHasherTypeless(h, keyCols[i]);
return h.finalize();
}
bool equals(const Row&, uint32_t lastCol) const;
inline bool equals(const Row&) const;
@ -942,6 +950,38 @@ inline void Row::colUpdateMariaDBHasher(datatypes::MariaDBHasher &h, uint32_t co
}
inline void Row::colUpdateMariaDBHasherTypeless(datatypes::MariaDBHasher &h, uint32_t col) const
{
switch (getColType(col))
{
case datatypes::SystemCatalog::CHAR:
case datatypes::SystemCatalog::VARCHAR:
case datatypes::SystemCatalog::BLOB:
case datatypes::SystemCatalog::TEXT:
{
CHARSET_INFO *cs = getCharset(col);
h.add(cs, getConstString(col));
break;
}
default:
{
if (isUnsigned(col))
{
uint64_t tb = getUintField(col);
h.add(&my_charset_bin, (const char*) &tb, 8);
}
else
{
int64_t val = getIntField(col);
h.add(&my_charset_bin, (const char*) &val, 8);
}
break;
}
}
}
inline void Row::setStringField(const uint8_t* strdata, uint32_t length, uint32_t colIndex)
{
uint64_t offset;