Exemplo n.º 1
0
bool RowColumn::operator==(const RowColumn& t) const
{
	if (fColumnVec.size() != t.columnVec().size())
		return false;
	for (uint32_t i = 0; i < fColumnVec.size(); i++)
	{
		if (fColumnVec[i].get() != NULL)
		{
			if (t.columnVec()[i].get() == NULL)
				return false;
			if (*(fColumnVec[i].get()) != t.columnVec()[i].get())
				return false;
		}
		else
			if (t.columnVec()[i].get() != NULL)
				return false;
	}
	return true;
}
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);

}