SCSEP FromSubQuery::transform()
{
assert (fFromSub);
SCSEP csep(new erydbSelectExecutionPlan());
csep->sessionID(fGwip.sessionid);
csep->location(erydbSelectExecutionPlan::FROM);
csep->subType (erydbSelectExecutionPlan::FROM_SUBS);
// gwi for the sub query
gp_walk_info gwi;
gwi.thd = fGwip.thd;
gwi.subQuery = this;
gwi.viewName = fGwip.viewName;
csep->derivedTbAlias(fAlias); // always lower case
if (getSelectPlan(gwi, *fFromSub, csep) != 0)
{
fGwip.fatalParseError = true;
if (!gwi.parseErrorText.empty())
fGwip.parseErrorText = gwi.parseErrorText;
else
fGwip.parseErrorText = "Error occured in FromSubQuery::transform()";
csep.reset();
return csep;
}
fGwip.subselectList.push_back(csep);
return csep;
}
SCSEP SelectSubQuery::transform()
{
idbassert(fSelSub);
SCSEP csep(new CalpontSelectExecutionPlan());
csep->sessionID(fGwip.sessionid);
csep->subType (CalpontSelectExecutionPlan::SELECT_SUBS);
// gwi for the sub query
gp_walk_info gwi;
gwi.thd = fGwip.thd;
gwi.subQuery = this;
// @4632 merge table list to gwi in case there is FROM sub to be referenced
// in the SELECT sub
gwi.derivedTbCnt = fGwip.derivedTbList.size();
uint32_t tbCnt = fGwip.tbList.size();
gwi.tbList.insert(gwi.tbList.begin(), fGwip.tbList.begin(), fGwip.tbList.end());
gwi.derivedTbList.insert(gwi.derivedTbList.begin(), fGwip.derivedTbList.begin(), fGwip.derivedTbList.end());
if (getSelectPlan(gwi, *(fSelSub->get_select_lex()), csep) != 0)
{
if (!gwi.fatalParseError)
{
fGwip.fatalParseError = true;
fGwip.parseErrorText = "Error occured in SelectSubQuery::transform()";
}
else
{
fGwip.fatalParseError = gwi.fatalParseError;
fGwip.parseErrorText = gwi.parseErrorText;
}
csep.reset();
return csep;
}
fGwip.subselectList.push_back(csep);
// remove outer query tables
CalpontSelectExecutionPlan::TableList tblist;
if (csep->tableList().size() >= tbCnt)
tblist.insert(tblist.begin(), csep->tableList().begin() + tbCnt, csep->tableList().end());
CalpontSelectExecutionPlan::SelectList derivedTbList;
if (csep->derivedTableList().size() >= gwi.derivedTbCnt)
derivedTbList.insert(derivedTbList.begin(), csep->derivedTableList().begin() + gwi.derivedTbCnt, csep->derivedTableList().end());
csep->tableList(tblist);
csep->derivedTableList(derivedTbList);
return csep;
}
execplan::ParseTree* ScalarSub::buildParseTree(PredicateOperator* op)
{
idbassert(fColumn.get() && fSub && fFunc);
vector<SRCP> cols;
Filter* filter;
RowColumn* rcol = dynamic_cast<RowColumn*>(fColumn.get());
if (rcol)
{
// IDB only supports (c1,c2..) =/!= (subquery)
if (fFunc->functype() != Item_func::EQ_FUNC && fFunc->functype() != Item_func::NE_FUNC)
{
fGwip.fatalParseError = true;
fGwip.parseErrorText = IDBErrorInfo::instance()->errorMsg(ERR_INVALID_OPERATOR_WITH_LIST);
return NULL;
}
cols = rcol->columnVec();
}
else
cols.push_back(fColumn);
SCSEP csep(new CalpontSelectExecutionPlan());
csep->sessionID(fGwip.sessionid);
csep->location(CalpontSelectExecutionPlan::WHERE);
csep->subType (CalpontSelectExecutionPlan::SINGLEROW_SUBS);
// gwi for the sub query
gp_walk_info gwi;
gwi.thd = fGwip.thd;
gwi.subQuery = this;
// @4827 merge table list to gwi in case there is FROM sub to be referenced
// in the FROM sub
gwi.derivedTbCnt = fGwip.derivedTbList.size();
uint32_t tbCnt = fGwip.tbList.size();
gwi.tbList.insert(gwi.tbList.begin(), fGwip.tbList.begin(), fGwip.tbList.end());
gwi.derivedTbList.insert(gwi.derivedTbList.begin(), fGwip.derivedTbList.begin(), fGwip.derivedTbList.end());
if (getSelectPlan(gwi, *(fSub->get_select_lex()), csep) != 0)
{
//@todo more in error handling
if (!gwi.fatalParseError)
{
fGwip.fatalParseError = true;
fGwip.parseErrorText = "Error occured in ScalarSub::transform()";
}
else
{
fGwip.fatalParseError = gwi.fatalParseError;
fGwip.parseErrorText = gwi.parseErrorText;
}
return NULL;
}
fGwip.subselectList.push_back(csep);
// error out non-support case for now: comparison out of semi join tables.
// only check for simplecolumn
if (!gwi.correlatedTbNameVec.empty())
{
for (uint32_t i = 0; i < cols.size(); i++)
{
SimpleColumn* sc = dynamic_cast<SimpleColumn*>(cols[i].get());
if (sc)
{
CalpontSystemCatalog::TableAliasName tan = make_aliastable(sc->schemaName(), sc->tableName(), sc->tableAlias());
uint32_t j = 0;
for (; j < gwi.correlatedTbNameVec.size(); j++)
if (tan == gwi.correlatedTbNameVec[j])
break;
if (j == gwi.correlatedTbNameVec.size())
{
fGwip.fatalParseError = true;
fGwip.parseErrorText = IDBErrorInfo::instance()->errorMsg(ERR_NON_SUPPORT_SCALAR);
return NULL;
}
}
}
}
// remove outer query tables
CalpontSelectExecutionPlan::TableList tblist;
if (csep->tableList().size() >= tbCnt)
tblist.insert(tblist.begin(), csep->tableList().begin() + tbCnt, csep->tableList().end());
CalpontSelectExecutionPlan::SelectList derivedTbList;
if (csep->derivedTableList().size() >= gwi.derivedTbCnt)
derivedTbList.insert(derivedTbList.begin(), csep->derivedTableList().begin() + gwi.derivedTbCnt, csep->derivedTableList().end());
csep->tableList(tblist);
csep->derivedTableList(derivedTbList);
// if (fSub->is_correlated)
if (fSub->unit->first_select()->master_unit()->uncacheable)
{
SelectFilter* subFilter = new SelectFilter();
subFilter->correlated(true);
subFilter->cols(cols);
subFilter->sub(csep);
subFilter->op(SOP(op));
subFilter->returnedColPos(fReturnedColPos);
filter = subFilter;
}
else
{
SimpleScalarFilter* subFilter = new SimpleScalarFilter();
subFilter->cols(cols);
subFilter->sub(csep);
subFilter->op(SOP(op));
filter = subFilter;
}
return new ParseTree(filter);
}
/** MySQL transform (NOT) IN subquery to (NOT) EXIST
*
*/
execplan::ParseTree* InSub::transform()
{
if (!fFunc)
return NULL;
// @todo need to handle scalar IN and BETWEEN specially
// this blocks handles only one subselect scalar
// arg[0]: column | arg[1]: subselect
//assert (fFunc->argument_count() == 2 && fGwip.rcWorkStack.size() >= 2);
if (fFunc->argument_count() != 2 || fGwip.rcWorkStack.size() < 2)
{
fGwip.fatalParseError = true;
fGwip.parseErrorText = "Unsupported item in IN subquery";
return NULL;
}
ReturnedColumn* rhs = fGwip.rcWorkStack.top();
fGwip.rcWorkStack.pop();
delete rhs;
ReturnedColumn* lhs = fGwip.rcWorkStack.top();
fGwip.rcWorkStack.pop();
delete lhs;
fSub = (Item_subselect*)(fFunc->arguments()[1]);
idbassert(fSub && fFunc);
SCSEP csep (new CalpontSelectExecutionPlan());
csep->sessionID(fGwip.sessionid);
csep->location(CalpontSelectExecutionPlan::WHERE);
csep->subType (CalpontSelectExecutionPlan::IN_SUBS);
// gwi for the sub query
gp_walk_info gwi;
gwi.thd = fGwip.thd;
gwi.subQuery = this;
// @4827 merge table list to gwi in case there is FROM sub to be referenced
// in the FROM sub
gwi.derivedTbCnt = fGwip.derivedTbList.size();
uint32_t tbCnt = fGwip.tbList.size();
gwi.tbList.insert(gwi.tbList.begin(), fGwip.tbList.begin(), fGwip.tbList.end());
gwi.derivedTbList.insert(gwi.derivedTbList.begin(), fGwip.derivedTbList.begin(), fGwip.derivedTbList.end());
if (getSelectPlan(gwi, *(fSub->get_select_lex()), csep) != 0)
{
fGwip.fatalParseError = true;
if (gwi.fatalParseError && !gwi.parseErrorText.empty())
fGwip.parseErrorText = gwi.parseErrorText;
else
fGwip.parseErrorText = "Error occured in InSub::transform()";
return NULL;
}
// remove outer query tables
CalpontSelectExecutionPlan::TableList tblist;
if (csep->tableList().size() >= tbCnt)
tblist.insert(tblist.begin(), csep->tableList().begin() + tbCnt, csep->tableList().end());
CalpontSelectExecutionPlan::SelectList derivedTbList;
if (csep->derivedTableList().size() >= gwi.derivedTbCnt)
derivedTbList.insert(derivedTbList.begin(),
csep->derivedTableList().begin() + gwi.derivedTbCnt,
csep->derivedTableList().end());
csep->tableList(tblist);
csep->derivedTableList(derivedTbList);
ExistsFilter* subFilter = new ExistsFilter();
subFilter->sub(csep);
if (gwi.subQuery->correlated())
subFilter->correlated(true);
else
subFilter->correlated(false);
if (fGwip.clauseType == HAVING && subFilter->correlated())
{
fGwip.fatalParseError = true;
fGwip.parseErrorText = logging::IDBErrorInfo::instance()->errorMsg(logging::ERR_NON_SUPPORT_HAVING);
}
fGwip.subselectList.push_back(csep);
return new ParseTree(subFilter);
}
