void Q1() {
string sql = "\
select\
c_custkey,\
c_name,\
sum(l_extendedprice * (1 - l_discount)) as revenue,\
c_acctbal,\
n_name,\
c_address,\
c_phone,\
c_comment\
from\
customer,\
orders,\
lineitem,\
nation\
where\
c_custkey = o_custkey\
and l_orderkey = o_orderkey\
and o_orderdate >= date ':1'\
and o_orderdate < date ':1' + interval '3' month\
and l_returnflag = 'R'\
and c_nationkey = n_nationkey\
group by\
c_custkey,\
c_name,\
c_acctbal,\
c_phone,\
n_name,\
c_address,\
c_comment\
order by\
revenue desc;";
CalpontSelectExecutionPlan csep;
// Returned columns
CalpontSelectExecutionPlan::ReturnedColumnList returnedColumnList;
SimpleColumn *c1 = new SimpleColumn("tpch.customer.l_returnflag");
returnedColumnList.push_back(c1);
SimpleColumn *c2 = new SimpleColumn("tpch.customer.c_name");
returnedColumnList.push_back(c2);
ArithmeticColumn *c3 = new ArithmeticColumn("sum(tpch.lineitem.l_extendedprice*(1-tpch.lineitem.l_discount))");
c3->alias("revenue");
returnedColumnList.push_back(c3);
SimpleColumn *c4 = new SimpleColumn("tpch.customer.c_acctbal");
returnedColumnList.push_back(c4);
SimpleColumn *c5 = new SimpleColumn("tpch.nation.n_name");
returnedColumnList.push_back(c5);
SimpleColumn *c6 = new SimpleColumn("tpch.customer.c_address");
returnedColumnList.push_back(c6);
SimpleColumn *c7 = new SimpleColumn("tpch.customer.c_phone");
returnedColumnList.push_back(c7);
SimpleColumn *c8 = new SimpleColumn("tpch.costomer.c_comment");
returnedColumnList.push_back(c8);
csep.returnedCols(returnedColumnList);
// Filters
CalpontSelectExecutionPlan::FilterTokenList filterTokenList;
SimpleFilter *f1 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.customer.c_custkey"),
new SimpleColumn("tpch.orders.o_custkey"));
filterTokenList.push_back(f1);
filterTokenList.push_back( new Operator ("and"));
SimpleFilter *f2 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.lineitem.l_orderkey"),
new SimpleColumn("tpch.orders.o_orderkey"));
filterTokenList.push_back(f2);
filterTokenList.push_back( new Operator ("and"));
SimpleFilter *f3 = new SimpleFilter (new Operator(">="),
new SimpleColumn("tpch.orders.o_orderdate"),
new ArithmeticColumn("date(':1')"));
filterTokenList.push_back(f3);
filterTokenList.push_back( new Operator ("and"));
SimpleFilter *f4 = new SimpleFilter (new Operator("<"),
new SimpleColumn("tpch.orders.o_orderdate"),
new ArithmeticColumn("date(':1') + interval ('3', month)"));
filterTokenList.push_back(f4);
filterTokenList.push_back( new Operator ("and"));
SimpleFilter *f5 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.lineitem.l_returnflag"),
new ConstantColumn("R"));
filterTokenList.push_back(f5);
filterTokenList.push_back( new Operator ("and"));
SimpleFilter *f6 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.customer.c_nationkey"),
new SimpleColumn("tpch.nation.n_nationkey"));
filterTokenList.push_back(f6);
csep.filterTokenList(filterTokenList);
ParseTree *pt = const_cast<ParseTree*>(csep.filters());
pt->drawTree ("q10.dot");
// Group by
CalpontSelectExecutionPlan::GroupByColumnList groupByList;
groupByList.push_back(c1->clone());
groupByList.push_back(c2->clone());
groupByList.push_back(c4->clone());
groupByList.push_back(c7->clone());
groupByList.push_back(c5->clone());
groupByList.push_back(c6->clone());
groupByList.push_back(c8->clone());
csep.groupByCols (groupByList);
// Order by
CalpontSelectExecutionPlan::OrderByColumnList orderByList;
ArithmeticColumn *o1 = new ArithmeticColumn(*c3);
o1->asc(false);
orderByList.push_back(o1);
csep.orderByCols(orderByList);
cout << csep;
}
void derivedTableOptimization(SCSEP& csep)
{
// @bug5634. replace the unused column with ConstantColumn from derived table column list,
// ExeMgr will not project ConstantColumn. Only count for local derived column.
// subquery may carry main query derived table list for column reference, those
// derived tables are not checked for optimization in this scope.
CalpontSelectExecutionPlan::SelectList derivedTbList = csep->derivedTableList();
// @bug6156. Skip horizontal optimization for no table union.
bool horizontalOptimization = true;
for (uint i = 0; i < derivedTbList.size(); i++)
{
CalpontSelectExecutionPlan* plan = dynamic_cast<CalpontSelectExecutionPlan*>(derivedTbList[i].get());
CalpontSelectExecutionPlan::ReturnedColumnList cols = plan->returnedCols();
vector<CalpontSelectExecutionPlan::ReturnedColumnList> unionColVec;
// only do vertical optimization for union all
// @bug6134. Also skip the vertical optimization for select distinct
// because all columns need to be projected to check the distinctness.
bool verticalOptimization = false;
if (plan->distinctUnionNum() == 0 && !plan->distinct())
{
verticalOptimization = true;
for (uint j = 0; j < plan->unionVec().size(); j++)
{
unionColVec.push_back(
dynamic_cast<CalpontSelectExecutionPlan*>(plan->unionVec()[j].get())->returnedCols());
}
}
if (plan->tableList().empty())
horizontalOptimization = false;
for (uint j = 0; j < plan->unionVec().size(); j++)
{
if (dynamic_cast<CalpontSelectExecutionPlan*>(plan->unionVec()[j].get())->tableList().empty())
{
horizontalOptimization = false;
break;
}
}
if (verticalOptimization)
{
int64_t val = 1;
for (uint i = 0; i < cols.size(); i++)
{
//if (cols[i]->derivedTable().empty())
if (cols[i]->refCount() == 0)
{
if (cols[i]->derivedRefCol())
cols[i]->derivedRefCol()->decRefCount();
cols[i].reset(new ConstantColumn(val));
for (uint j = 0; j < unionColVec.size(); j++)
unionColVec[j][i].reset(new ConstantColumn(val));
}
}
// set back
plan->returnedCols(cols);
for (uint j = 0; j < unionColVec.size(); j++)
dynamic_cast<CalpontSelectExecutionPlan*>(plan->unionVec()[j].get())->returnedCols(unionColVec[j]);
}
}
/*
* @bug5635. Move filters that only belongs to a derived table to inside the derived table.
* 1. parse tree walk to populate derivedTableFilterMap and set null candidate on the tree.
* 2. remove the null filters
* 3. and the filters of derivedTableFilterMap and append to the WHERE filter of the derived table
*
* Note:
* 1. Subquery filters is ignored because derived table can not be in subquery
* 2. While walking tree, whenever a single derive simplefilter is encountered,
* this filter is pushed to the corresponding stack
* 2. Whenever an OR operator is encountered, all the filter stack of
* that OR involving derived table are emptied and null candidate of each
* stacked filter needs to be reset (not null)
*/
ParseTree* pt = csep->filters();
map<string, ParseTree*> derivedTbFilterMap;
if (horizontalOptimization && pt)
{
pt->walk(setDerivedTable);
setDerivedFilter(pt, derivedTbFilterMap, derivedTbList);
csep->filters(pt);
}
// AND the filters of individual stack to the derived table filter tree
// @todo union filters.
// @todo outer join complication
map<string, ParseTree*>::iterator mapIt;
for (uint i = 0; i < derivedTbList.size(); i++)
{
CalpontSelectExecutionPlan* plan = dynamic_cast<CalpontSelectExecutionPlan*>(derivedTbList[i].get());
CalpontSelectExecutionPlan::ReturnedColumnList derivedColList = plan->returnedCols();
mapIt = derivedTbFilterMap.find(plan->derivedTbAlias());
if (mapIt != derivedTbFilterMap.end())
{
// replace all derived column of this filter with real column from
// derived table projection list.
ParseTree* mainFilter = new ParseTree();
mainFilter->copyTree(*(mapIt->second));
replaceRefCol(mainFilter, derivedColList);
ParseTree* derivedFilter = plan->filters();
if (derivedFilter)
{
LogicOperator* op = new LogicOperator("and");
ParseTree* filter = new ParseTree(op);
filter->left(derivedFilter);
filter->right(mainFilter);
plan->filters(filter);
}
else
{
plan->filters(mainFilter);
}
// union filter handling
for (uint j = 0; j < plan->unionVec().size(); j++)
{
CalpontSelectExecutionPlan* unionPlan =
dynamic_cast<CalpontSelectExecutionPlan*>(plan->unionVec()[j].get());
CalpontSelectExecutionPlan::ReturnedColumnList unionColList = unionPlan->returnedCols();
ParseTree* mainFilterForUnion = new ParseTree();
mainFilterForUnion->copyTree(*(mapIt->second));
replaceRefCol(mainFilterForUnion, unionColList);
ParseTree* unionFilter = unionPlan->filters();
if (unionFilter)
{
LogicOperator* op = new LogicOperator("and");
ParseTree* filter = new ParseTree(op);
filter->left(unionFilter);
filter->right(mainFilterForUnion);
unionPlan->filters(filter);
}
else
{
unionPlan->filters(mainFilterForUnion);
}
}
}
}
// clean derivedTbFilterMap because all the filters are copied
for ( mapIt = derivedTbFilterMap.begin(); mapIt != derivedTbFilterMap.end(); ++mapIt )
delete (*mapIt).second;
// recursively process the nested derived table
for (uint i = 0; i < csep->subSelectList().size(); i++)
{
SCSEP subselect(boost::dynamic_pointer_cast<CalpontSelectExecutionPlan>(csep->subSelectList()[i]));
derivedTableOptimization(subselect);
}
}
void Q1() {
string sql = "\
select\
supp_nation,\
cust_nation,\
l_year,\
sum(volume) as revenue\
from\
(\
select\
n1.n_name as supp_nation,\
n2.n_name as cust_nation,\
extract(year from l_shipdate) as l_year,\
l_extendedprice * (1 - l_discount) as volume\
from\
supplier,\
lineitem,\
orders,\
customer,\
nation n1,\
nation n2\
where\
s_suppkey = l_suppkey\
and o_orderkey = l_orderkey\
and c_custkey = o_custkey\
and s_nationkey = n1.n_nationkey\
and c_nationkey = n2.n_nationkey\
and (\
(n1.n_name = ':1' and n2.n_name = ':2')\
or (n1.n_name = ':2' and n2.n_name = ':1')\
)\
and l_shipdate between date '1995-01-01' and date '1996-12-31'\
) as shipping\
group by\
supp_nation,\
cust_nation,\
l_year\
order by\
supp_nation,\
cust_nation,\
l_year;";
CalpontSelectExecutionPlan csep;
// Returned columns
CalpontSelectExecutionPlan::ReturnedColumnList returnedColumnList;
// these columns are from the temp table of FROM clause.
// I hereby give schema name "calpont", table name "FROMTABLE",
// and alias name "shipping"
SimpleColumn *c1 = new SimpleColumn("calpont.FROMTABLE.supp_nation");
c1->tableAlias ("shipping");
returnedColumnList.push_back(c1);
SimpleColumn *c2 = new SimpleColumn("calpont.FROMTABLE.cust_nation");
c2->tableAlias ("shipping");
returnedColumnList.push_back(c2);
SimpleColumn *c3 = new SimpleColumn("tpch.lineitem.l_year");
returnedColumnList.push_back(c3);
ArithmeticColumn *c4 = new ArithmeticColumn("sum(volumn)");
c4->alias("revenue");
returnedColumnList.push_back(c4);
csep.returnedCols(returnedColumnList);
// from subselect
CalpontSelectExecutionPlan *subsep =
new CalpontSelectExecutionPlan(CalpontSelectExecutionPlan::FROM);
// subselect returned columns
CalpontSelectExecutionPlan::ReturnedColumnList subReturnedColList;
SimpleColumn *sc1 = new SimpleColumn("tpch.nation.n_name");
sc1->alias ("supp_nation");
sc1->tableAlias ("n1");
subReturnedColList.push_back(sc1);
SimpleColumn *sc2 = new SimpleColumn("tpch.nation.n_name");
sc1->alias ("cust_nation");
sc1->tableAlias ("n2");
subReturnedColList.push_back(sc2);
ArithmeticColumn *sc3 = new ArithmeticColumn("extract(year from tpch.lineitem.l_shipdate)");
sc3->alias("l_year");
subReturnedColList.push_back(sc3);
ArithmeticColumn *sc4 = new ArithmeticColumn("tpch.lineitem.l_extendeprice * (1-tpch.lineitem.l_discount)");
sc3->alias("volume");
subReturnedColList.push_back(sc4);
subsep->returnedCols(subReturnedColList);
// subselect filters
CalpontSelectExecutionPlan::FilterTokenList subFilterTokenList;
SimpleFilter *sf1 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.supplier.s_suppkey"),
new SimpleColumn("tpch.lineitem.l_suppkey"));
subFilterTokenList.push_back(sf1);
subFilterTokenList.push_back(new Operator("and"));
SimpleFilter *sf2 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.orders.o_orderkey"),
new SimpleColumn("tpch.lineitem.l_orderkey"));
subFilterTokenList.push_back(sf2);
subFilterTokenList.push_back(new Operator("and"));
SimpleFilter *sf3 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.customer.c_custkey"),
new SimpleColumn("tpch.orders.o_custkey"));
subFilterTokenList.push_back(sf3);
subFilterTokenList.push_back(new Operator("and"));
SimpleColumn *n1 = new SimpleColumn ("tpch.nation.n_nationkey");
n1->tableAlias("n1");
SimpleFilter *sf4 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.supplier.s_nationkey"),
n1);
subFilterTokenList.push_back(sf4);
subFilterTokenList.push_back(new Operator("and"));
SimpleColumn *n2 = new SimpleColumn ("tpch.nation.n_nationkey");
n2->tableAlias("n2");
SimpleFilter *sf5 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.customer.c_nationkey"),
n2);
subFilterTokenList.push_back(sf5);
subFilterTokenList.push_back(new Operator("and"));
// ((n1.n_name = ':1' and n2.n_name = ':2')
// or (n1.n_name = ':2' and n2.n_name = ':1'))
subFilterTokenList.push_back(new Operator("("));
subFilterTokenList.push_back(new Operator("("));
SimpleColumn *n1_name = new SimpleColumn("tpch.nation.n_name");
n1_name->tableAlias ("n1");
SimpleFilter *sf6 = new SimpleFilter ( new Operator("="),
n1_name,
new ConstantColumn (":1"));
subFilterTokenList.push_back(sf6);
subFilterTokenList.push_back(new Operator("and"));
SimpleColumn *n2_name = new SimpleColumn("tpch.nation.n_name");
n1_name->tableAlias ("n2");
SimpleFilter *sf7 = new SimpleFilter ( new Operator("="),
n2_name,
new ConstantColumn (":2"));
subFilterTokenList.push_back(sf7);
subFilterTokenList.push_back(new Operator (")"));
subFilterTokenList.push_back(new Operator("or"));
subFilterTokenList.push_back(new Operator("("));
SimpleFilter *sf8 = new SimpleFilter ( new Operator("="),
new SimpleColumn(*n1_name),
new ConstantColumn (":2"));
subFilterTokenList.push_back(sf8);
subFilterTokenList.push_back(new Operator("and"));
SimpleFilter *sf9 = new SimpleFilter ( new Operator("="),
new SimpleColumn(*n2_name),
new ConstantColumn (":1"));
subFilterTokenList.push_back(sf9);
subFilterTokenList.push_back(new Operator (")"));
subFilterTokenList.push_back(new Operator (")"));
subFilterTokenList.push_back(new Operator("and"));
SimpleFilter *sf10 = new SimpleFilter (new Operator (">="),
new SimpleColumn ("tpch.lineitem.l_shipdate"),
new ConstantColumn ("1995-01-01"));
subFilterTokenList.push_back(sf10);
subFilterTokenList.push_back(new Operator("and"));
SimpleFilter *sf11 = new SimpleFilter (new Operator ("<="),
new SimpleColumn ("tpch.lineitem.l_shipdate"),
new ConstantColumn ("1995-01-06"));
subFilterTokenList.push_back(sf11);
subsep->filterTokenList(subFilterTokenList);
// end of subselect in FROM. push FROM subselect to selectList
// NOTE: only FROM subselect needs to be pushed into selectList.
// Subselects in WHERE or HAVING clause are in where or having
// filter parse tree. It may make more sense to change the member
// fSelectList of CSEP class to fFromSubSelect (type CSEP*)
CalpontSelectExecutionPlan::SelectList fromSubSelectList;
fromSubSelectList.push_back(subsep);
csep.subSelects(fromSubSelectList);
ParseTree* pt = const_cast<ParseTree*>(subsep->filters());
pt->drawTree("q7.dot");
// Group by
CalpontSelectExecutionPlan::GroupByColumnList groupByList;
SimpleColumn *g1 = new SimpleColumn (*c1);
groupByList.push_back (g1);
SimpleColumn *g2 = new SimpleColumn (*c2);
groupByList.push_back (g2);
SimpleColumn *g3 = new SimpleColumn (*c3);
groupByList.push_back (g3);
csep.groupByCols(groupByList);
// Order by
CalpontSelectExecutionPlan::OrderByColumnList orderByList;
SimpleColumn *o1 = new SimpleColumn(*c1);
orderByList.push_back(o1);
SimpleColumn *o2 = new SimpleColumn(*c2);
orderByList.push_back(o2);
SimpleColumn *o3 = new SimpleColumn(*c3);
orderByList.push_back(o3);
csep.orderByCols(orderByList);
cout << csep;
}
void selectExecutionPlan_1() {
cout << "SQL: select r_regionkey from region, nation where n_regionkey = r_regionkey and n_regionkey = 2;" << endl;
CalpontSelectExecutionPlan csep;
CalpontSelectExecutionPlan::ReturnedColumnList colList;
ParseTree* filterList;
// returned columns
SimpleColumn r_regionkey("tpch.region.r_regionkey");
SimpleColumn n_regionkey("tpch.nation.n_regionkey");
SimpleColumn p_partkey("tpch.part.p_partkey");
SimpleColumn n_name("tpch.nation.n_name");
SimpleColumn c_custkey("tpch.customer.c_custkey");
colList.push_back(new SimpleColumn(r_regionkey));
// filters
CalpontSelectExecutionPlan::Parser parser;
std::vector<Token> tokens;
//tokens.push_back(Token(new Operator("(")));
//tokens.push_back(Token(new Operator(")")));
tokens.push_back(Token(new SimpleFilter(new Operator("="),
new SimpleColumn(r_regionkey),
new SimpleColumn(n_regionkey))));
tokens.push_back(Token(new Operator("and")));
tokens.push_back(Token(new SimpleFilter(new Operator("="),
new SimpleColumn(r_regionkey),
new SimpleColumn(c_custkey))));
tokens.push_back(Token(new Operator("and")));
tokens.push_back(Token(new Operator("(")));
tokens.push_back(Token(new SimpleFilter(new Operator("="),
new SimpleColumn(n_regionkey),
new ConstantColumn("779"))));
tokens.push_back(Token(new Operator("or")));
tokens.push_back(Token(new SimpleFilter(new Operator("!="),
new SimpleColumn(n_name),
new ConstantColumn("'ASIA'"))));
tokens.push_back(Token(new Operator(")")));
tokens.push_back(Token(new Operator ("and")));
tokens.push_back(Token(new Operator("(")));
tokens.push_back(Token(new SimpleFilter(new Operator("<"),
new SimpleColumn(n_regionkey),
new ConstantColumn("77"))));
tokens.push_back(Token(new Operator("or")));
tokens.push_back(Token(new SimpleFilter(new Operator(">"),
new SimpleColumn(p_partkey),
new ConstantColumn("7007"))));
tokens.push_back(Token(new Operator(")")));
filterList = parser.parse(tokens.begin(), tokens.end());
// draw filterList tree
filterList->drawTree("selectExecutionPlan_1.dot");
// calpont execution plan
csep.returnedCols (colList);
csep.filters (filterList);
cout << "\nCalpont Execution Plan:" << endl;
cout << csep << endl;
cout << " --- end of test 1 ---" << endl;
filterList->walk(walkfnString);
}
void Q1() {
string sql = "\
select\
l_orderkey,\
sum(l_extendedprice * (1 - l_discount)) as revenue,\
o_orderdate,\
o_shippriority\
from\
customer,\
orders,\
lineitem\
where\
c_mktsegment = ':1'\
and c_custkey = o_custkey\
and l_orderkey = o_orderkey\
and o_orderdate < date ':2'\
and l_shipdate > date ':2'\
group by\
l_orderkey,\
o_orderdate,\
o_shippriority\
order by\
revenue desc,\
o_orderdate;";
CalpontSelectExecutionPlan csep;
// Returned columns
CalpontSelectExecutionPlan::ReturnedColumnList returnedColumnList;
SimpleColumn *c1 = new SimpleColumn("tpch.lineitem.l_orderkey");
returnedColumnList.push_back(c1);
ArithmeticColumn *c2 = new ArithmeticColumn
("sum(tpch.lineitem.l_extendedprice * (1 - tpch.lineitem.l_discount))");
c2->alias("revenue");
returnedColumnList.push_back(c2);
SimpleColumn *c3 = new SimpleColumn("tpch.orders.o_orderdate");
returnedColumnList.push_back(c3);
SimpleColumn *c4 = new SimpleColumn("tpch.orders.o_shippriority");
returnedColumnList.push_back(c4);
csep.returnedCols(returnedColumnList);
// Filters
CalpontSelectExecutionPlan::FilterTokenList filterTokenList;
SimpleFilter *f1 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.customer.c_mktsegment"),
new ConstantColumn(":1"));
filterTokenList.push_back(f1);
filterTokenList.push_back(new Operator("and"));
SimpleFilter *f2 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.customer.c_custkey"),
new SimpleColumn("tpch.orders.o_custkey"));
filterTokenList.push_back(f2);
filterTokenList.push_back(new Operator("and"));
SimpleFilter *f3 = new SimpleFilter (new Operator("="),
new SimpleColumn("tpch.lineitem.l_orderkey"),
new SimpleColumn("tpch.orders.o_orderkey"));
filterTokenList.push_back(f3);
filterTokenList.push_back(new Operator("and"));
SimpleFilter *f4 = new SimpleFilter (new Operator("<"),
new SimpleColumn("tpch.orders.o_orderdate"),
new ArithmeticColumn("date(':2')"));
filterTokenList.push_back(f4);
filterTokenList.push_back(new Operator("and"));
SimpleFilter *f5 = new SimpleFilter (new Operator(">"),
new SimpleColumn("tpch.lineitem.l_shipdate"),
new ArithmeticColumn("date(':2')"));
filterTokenList.push_back(f5);
csep.filterTokenList(filterTokenList);
ParseTree* pt = const_cast<ParseTree*>(csep.filters());
pt->drawTree("q3.dot");
// Group by
CalpontSelectExecutionPlan::GroupByColumnList groupByList;
SimpleColumn *g1 = new SimpleColumn(*c1);
groupByList.push_back(g1);
SimpleColumn *g2 = new SimpleColumn(*c3);
groupByList.push_back(g2);
SimpleColumn *g3 = new SimpleColumn(*c4);
groupByList.push_back(g3);
csep.groupByCols(groupByList);
// Order by
CalpontSelectExecutionPlan::OrderByColumnList orderByList;
//ArithmeticColumn *test = new ArithmeticColumn("a+b");
ArithmeticColumn *o1 = new ArithmeticColumn(*c2);
o1->asc(false);
orderByList.push_back(o1);
SimpleColumn *o2 = new SimpleColumn(*c3);
orderByList.push_back(o2);
csep.orderByCols(orderByList);
cout << csep;
}