bool ProjectionExecutor::p_init(AbstractPlanNode *abstractNode,
TempTableLimits* limits)
{
VOLT_TRACE("init Projection Executor");
assert(limits);
ProjectionPlanNode* node = dynamic_cast<ProjectionPlanNode*>(abstractNode);
assert(node);
//
// Construct the output table
//
TupleSchema* schema = node->generateTupleSchema(true);
m_columnCount = static_cast<int>(node->getOutputSchema().size());
std::string* column_names = new std::string[m_columnCount];
for (int ctr = 0; ctr < m_columnCount; ctr++)
{
column_names[ctr] = node->getOutputSchema()[ctr]->getColumnName();
}
node->setOutputTable(TableFactory::getTempTable(node->databaseId(),
"temp",
schema,
column_names,
limits));
delete[] column_names;
// initialize local variables
all_tuple_array_ptr = ExpressionUtil::convertIfAllTupleValues(node->getOutputColumnExpressions());
all_tuple_array = all_tuple_array_ptr.get();
all_param_array_ptr = ExpressionUtil::convertIfAllParameterValues(node->getOutputColumnExpressions());
all_param_array = all_param_array_ptr.get();
needs_substitute_ptr = boost::shared_array<bool>(new bool[m_columnCount]);
needs_substitute = needs_substitute_ptr.get();
typedef AbstractExpression* ExpRawPtr;
expression_array_ptr = boost::shared_array<ExpRawPtr>(new ExpRawPtr[m_columnCount]);
expression_array = expression_array_ptr.get();
for (int ctr = 0; ctr < m_columnCount; ctr++) {
assert (node->getOutputColumnExpressions()[ctr] != NULL);
expression_array_ptr[ctr] = node->getOutputColumnExpressions()[ctr];
needs_substitute_ptr[ctr] = node->getOutputColumnExpressions()[ctr]->hasParameter();
}
output_table = dynamic_cast<TempTable*>(node->getOutputTable()); //output table should be temptable
if (!node->isInline()) {
input_table = node->getInputTables()[0];
tuple = TableTuple(input_table->schema());
}
return true;
}
bool ProjectionExecutor::p_init(AbstractPlanNode *abstractNode,
TempTableLimits* limits)
{
VOLT_TRACE("init Projection Executor");
assert(limits);
ProjectionPlanNode* node = dynamic_cast<ProjectionPlanNode*>(abstractNode);
assert(node);
// Create output table based on output schema from the plan
setTempOutputTable(limits);
m_columnCount = static_cast<int>(node->getOutputSchema().size());
// initialize local variables
all_tuple_array_ptr = ExpressionUtil::convertIfAllTupleValues(node->getOutputColumnExpressions());
all_tuple_array = all_tuple_array_ptr.get();
all_param_array_ptr = ExpressionUtil::convertIfAllParameterValues(node->getOutputColumnExpressions());
all_param_array = all_param_array_ptr.get();
needs_substitute_ptr = boost::shared_array<bool>(new bool[m_columnCount]);
needs_substitute = needs_substitute_ptr.get();
typedef AbstractExpression* ExpRawPtr;
expression_array_ptr = boost::shared_array<ExpRawPtr>(new ExpRawPtr[m_columnCount]);
expression_array = expression_array_ptr.get();
for (int ctr = 0; ctr < m_columnCount; ctr++) {
assert (node->getOutputColumnExpressions()[ctr] != NULL);
VOLT_TRACE("OutputColumnExpressions [%d]: %s", ctr,
node->getOutputColumnExpressions()[ctr]->debug(true).c_str());
expression_array_ptr[ctr] = node->getOutputColumnExpressions()[ctr];
needs_substitute_ptr[ctr] = node->getOutputColumnExpressions()[ctr]->hasParameter();
}
output_table = dynamic_cast<TempTable*>(node->getOutputTable()); //output table should be temptable
if (!node->isInline()) {
Table* input_table = node->getInputTable();
tuple = TableTuple(input_table->schema());
}
return true;
}
