public void selectRecord(String tableName, ArrayList<Condition> conditions)
throws TableNotFoundException {
Table table = cm.getTable(tableName);
if (table == null) throw new TableNotFoundException(tableName);
Data selectResult = new Data();
for (int blockOffset = 0; blockOffset < table.blockNum; blockOffset++) {
BufferNode bn = bm.getBufferNode(table.name + ".table", blockOffset);
byte[] block = bn.data;
int recordNum = getRecordNum(block);
int recordIndex = 0;
int accessedRecordNum = 0;
while (accessedRecordNum < recordNum) {
int pos = getPositionFromIndex(table, recordIndex);
if (block[pos] == EMPTY) { // record is empty, skip
recordIndex++;
continue;
}
byte[] recordBytes = bn.getBytes(pos + 1, table.totalLength);
if (matchAllCond(table, recordBytes, conditions)) {
byte[] bytes = bn.getBytes(pos + 1, table.totalLength);
selectResult.add(new Row(bytesToString(table, bytes)));
}
recordIndex++;
accessedRecordNum++;
}
}
displaySelectResult(table, selectResult);
}
