bool Column::getAggregate(AST* ast) const
{
/* AST type must be 'value' and aggregation string must not be empty */
if (ast->type == fbitdump::Column::AST::valueType) {
if (!ast->aggregation.empty()) {
return true;
}
/* or both sides of operation must be aggregable */
} else if (ast->type == fbitdump::Column::AST::operationType) {
return getAggregate(ast->left) && getAggregate(ast->right);
}
/* all other cases */
return false;
}
bool Column::getAggregate() const
{
/* Name columns are not aggregable */
if (this->ast != NULL && getAggregate(this->ast)) {
return true;
}
return false;
}
virtual void process()
{
IRecordSize *recordSize = helper->queryOutputMeta();
Owned<IThorRowInterfaces> rowIf = createThorRowInterfaces(queryRowManager(), helper->queryOutputMeta(), queryId(), queryCodeContext());
OwnedConstThorRow result = getAggregate(*this, container.queryJob().querySlaves(), *rowIf, *helper, mpTag);
if (!result)
return;
CMessageBuffer msg;
CMemoryRowSerializer mbs(msg);
rowIf->queryRowSerializer()->serialize(mbs, (const byte *)result.get());
if (!queryJobChannel().queryJobComm().send(msg, 1, mpTag, 5000))
throw MakeThorException(0, "Failed to give result to slave");
}
