TupleSchema* AbstractPlanNode::generateDMLCountTupleSchema()
{
// Assuming the expected output schema here saves the expense of hard-coding it into each DML plan.
vector<voltdb::ValueType> columnTypes(1, VALUE_TYPE_BIGINT);
vector<int32_t> columnSizes(1, sizeof(int64_t));
vector<bool> columnAllowNull(1, false);
vector<bool> columnInBytes(1, false);
TupleSchema* schema = TupleSchema::createTupleSchema(columnTypes, columnSizes,
columnAllowNull, columnInBytes);
return schema;
}
TupleSchema*
TupleSchema::createTupleSchema(const TupleSchema *first,
const std::vector<uint16_t> firstSet,
const TupleSchema *second,
const std::vector<uint16_t> secondSet) {
assert(first);
const std::vector<uint16_t>::size_type offset = firstSet.size();
const std::vector<uint16_t>::size_type combinedColumnCount = firstSet.size()
+ secondSet.size();
std::vector<ValueType> columnTypes;
std::vector<int32_t> columnLengths;
std::vector<bool> columnAllowNull(combinedColumnCount, true);
std::vector<bool> columnInBytes(combinedColumnCount, false);
std::vector<uint16_t>::const_iterator iter;
for (iter = firstSet.begin(); iter != firstSet.end(); iter++) {
const TupleSchema::ColumnInfo *columnInfo = first->getColumnInfo(*iter);
columnTypes.push_back(columnInfo->getVoltType());
columnLengths.push_back(columnInfo->length);
columnAllowNull[*iter] = columnInfo->allowNull;
columnInBytes[*iter] = columnInfo->inBytes;
}
for (iter = secondSet.begin(); second && iter != secondSet.end(); iter++) {
const TupleSchema::ColumnInfo *columnInfo = second->getColumnInfo(*iter);
columnTypes.push_back(columnInfo->getVoltType());
columnLengths.push_back(columnInfo->length);
columnAllowNull[offset + *iter] = columnInfo->allowNull;
columnInBytes[offset + *iter] = columnInfo->inBytes;
}
TupleSchema *schema = TupleSchema::createTupleSchema(columnTypes,
columnLengths,
columnAllowNull,
columnInBytes);
// Remember to set the inlineability of each column correctly.
for (iter = firstSet.begin(); iter != firstSet.end(); iter++) {
ColumnInfo *info = schema->getColumnInfo(*iter);
info->inlined = first->getColumnInfo(*iter)->inlined;
}
for (iter = secondSet.begin(); second && iter != secondSet.end(); iter++) {
ColumnInfo *info = schema->getColumnInfo((int)offset + *iter);
info->inlined = second->getColumnInfo(*iter)->inlined;
}
return schema;
}
