ItemPointer DataTable::InsertTuple(const storage::Tuple *tuple,
concurrency::Transaction *transaction,
ItemPointer **index_entry_ptr) {
// the upper layer may not pass a index_entry_ptr (default value: nullptr)
// into the function.
// in this case, we have to create a temp_ptr to hold the content.
ItemPointer *temp_ptr = nullptr;
if (index_entry_ptr == nullptr) {
index_entry_ptr = &temp_ptr;
}
ItemPointer location = GetEmptyTupleSlot(tuple);
if (location.block == INVALID_OID) {
LOG_TRACE("Failed to get tuple slot.");
return INVALID_ITEMPOINTER;
}
LOG_TRACE("Location: %u, %u", location.block, location.offset);
auto index_count = GetIndexCount();
if (index_count == 0) {
// Increase the table's number of tuples by 1
IncreaseTupleCount(1);
return location;
}
// Index checks and updates
if (InsertInIndexes(tuple, location, transaction, index_entry_ptr) == false) {
LOG_TRACE("Index constraint violated");
return INVALID_ITEMPOINTER;
}
// ForeignKey checks
if (CheckForeignKeyConstraints(tuple) == false) {
LOG_TRACE("ForeignKey constraint violated");
return INVALID_ITEMPOINTER;
}
PL_ASSERT((*index_entry_ptr)->block == location.block &&
(*index_entry_ptr)->offset == location.offset);
// Increase the table's number of tuples by 1
IncreaseTupleCount(1);
return location;
}
ItemPointer DataTable::AcquireVersion() {
// First, claim a slot
ItemPointer location = GetEmptyTupleSlot(nullptr);
if (location.block == INVALID_OID) {
LOG_TRACE("Failed to get tuple slot.");
return INVALID_ITEMPOINTER;
}
LOG_TRACE("Location: %u, %u", location.block, location.offset);
IncreaseTupleCount(1);
return location;
}
// insert tuple into a table that is without index.
ItemPointer DataTable::InsertTuple(const storage::Tuple *tuple) {
ItemPointer location = GetEmptyTupleSlot(tuple);
if (location.block == INVALID_OID) {
LOG_TRACE("Failed to get tuple slot.");
return INVALID_ITEMPOINTER;
}
LOG_TRACE("Location: %u, %u", location.block, location.offset);
UNUSED_ATTRIBUTE auto index_count = GetIndexCount();
PL_ASSERT(index_count == 0);
// Increase the table's number of tuples by 1
IncreaseTupleCount(1);
return location;
}