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join.py
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from utils import *
R_HASH_BASE_ADDR = '0x11111111'
S_HASH_BASE_ADDR = '0x33333333'
BUCKET_NUM = 7
def nest_loop_join():
BUFFER.freeBuffer()
R_addr = int(R_BASE_ADDR, 16)
resultPtr = BUFFER.getNewBlockInBuffer()
result_offset = 0
result_addr = int(RESULT_BASE_ADDR, 16)
for i in range(R_BLOCK_NUM):
R_blkPtr = BUFFER.readBlockFromDisk(addr=R_addr)
R_addr = int(''.join(BUFFER.data[R_blkPtr + 56: R_blkPtr + 60]), 16)
S_addr = int(S_BASE_ADDR, 16)
for j in range(S_BLOCK_NUM):
S_blkPtr = BUFFER.readBlockFromDisk(addr=S_addr)
S_addr = int(''.join(BUFFER.data[S_blkPtr + 56: S_blkPtr + 60]), 16)
R_bytesPtr = 0
while R_bytesPtr < blkSize - 8:
A_bytes, B_bytes, R_bytesPtr = getBytes_A_B(R_blkPtr, R_bytesPtr)
S_bytesPtr = 0
while S_bytesPtr < blkSize - 8:
C_bytes, D_bytes, S_bytesPtr = getBytes_A_B(S_blkPtr, S_bytesPtr)
if BytesToInt(A_bytes) == BytesToInt(C_bytes):
print('(A,C={},B={},D={})'.format(BytesToInt(A_bytes), BytesToInt(B_bytes), BytesToInt(D_bytes)))
resultPtr, result_offset, result_addr = add_result(resultPtr, result_offset, result_addr,
'./result/nest_loop_join/', A_bytes + B_bytes + D_bytes)
BUFFER.freeBlockInBuffer(S_blkPtr)
BUFFER.freeBlockInBuffer(R_blkPtr)
if result_offset !=0:
result_next_addr = result_addr + 64
result_next_bytes_addr = IntToBytes(result_next_addr)
for i in range(4):
BUFFER.data[resultPtr + blkSize - 4 +i ] = result_next_bytes_addr[2*i:2*(i+1)]
BUFFER.writeBlockToDisk(resultPtr, './result/nest_loop_join/', result_addr)
BUFFER.freeBlockInBuffer(resultPtr)
print('The num of IO is', BUFFER.numIO)
BUFFER.freeBuffer()
def sort_merge_join():
sort_R()
sort_S()
# BUFFER.freeBuffer()
R_addr = int(R_BASE_ADDR, 16)
S_addr = int(S_BASE_ADDR, 16)
R_read_num = 0
S_read_num = 0
resultPtr = BUFFER.getNewBlockInBuffer()
result_offset = 0
result_addr = int(RESULT_BASE_ADDR, 16)
R_blkPtr = BUFFER.readBlockFromDisk(addr=R_addr)
S_blkPtr = BUFFER.readBlockFromDisk(addr=S_addr)
R_bytesPtr = 0
S_bytesPtr = 0
R_read_num += 1
S_read_num += 1
A_bytes, B_bytes, R_bytesPtr = getBytes_A_B(R_blkPtr, R_bytesPtr)
C_bytes, D_bytes, S_bytesPtr = getBytes_A_B(S_blkPtr, S_bytesPtr)
while not(R_read_num == R_BLOCK_NUM and R_bytesPtr >= blkSize - 8 and S_read_num == S_BLOCK_NUM and S_bytesPtr >= blkSize - 8):
if BytesToInt(A_bytes) == BytesToInt(C_bytes):
constant = A_bytes
R_list = [B_bytes]
S_list = [D_bytes]
while True:
A_bytes, B_bytes, R_bytesPtr = getBytes_A_B(R_blkPtr, R_bytesPtr)
if R_bytesPtr >= blkSize - 8 and R_read_num < R_BLOCK_NUM:
R_addr = int(''.join(BUFFER.data[R_blkPtr + 56: R_blkPtr + 60]), 16)
BUFFER.freeBlockInBuffer(R_blkPtr)
R_blkPtr = BUFFER.readBlockFromDisk(addr=R_addr)
R_read_num += 1
R_bytesPtr = 0
if BytesToInt(A_bytes) == BytesToInt(constant):
R_list.append(B_bytes)
else:
break
while True:
C_bytes, D_bytes, S_bytesPtr = getBytes_A_B(S_blkPtr, S_bytesPtr)
if S_bytesPtr >= blkSize - 8 and S_read_num < S_BLOCK_NUM:
S_addr = int(''.join(BUFFER.data[S_blkPtr + 56: S_blkPtr + 60]), 16)
BUFFER.freeBlockInBuffer(S_blkPtr)
S_read_num += 1
S_blkPtr = BUFFER.readBlockFromDisk(addr=S_addr)
S_bytesPtr = 0
if BytesToInt(C_bytes) == BytesToInt(constant):
S_list.append(D_bytes)
else:
break
for B in R_list:
for D in S_list:
print('(A,C={},B={},D={})'.format(BytesToInt(constant), BytesToInt(B), BytesToInt(D)))
resultPtr, result_offset, result_addr = add_result(resultPtr, result_offset, result_addr,
'./result/sort_merge_join/', constant + B + D)
elif BytesToInt(A_bytes) > BytesToInt(C_bytes):
C_bytes, D_bytes, S_bytesPtr = getBytes_A_B(S_blkPtr, S_bytesPtr)
else:
A_bytes, B_bytes, R_bytesPtr = getBytes_A_B(R_blkPtr, R_bytesPtr)
if S_bytesPtr >= blkSize - 8 and S_read_num < S_BLOCK_NUM:
S_addr = int(''.join(BUFFER.data[S_blkPtr + 56: S_blkPtr + 60]), 16)
BUFFER.freeBlockInBuffer(S_blkPtr)
S_read_num += 1
S_blkPtr = BUFFER.readBlockFromDisk(addr=S_addr)
S_bytesPtr = 0
if R_bytesPtr >= blkSize - 8 and R_read_num < R_BLOCK_NUM:
R_addr = int(''.join(BUFFER.data[R_blkPtr + 56: R_blkPtr + 60]), 16)
BUFFER.freeBlockInBuffer(R_blkPtr)
R_blkPtr = BUFFER.readBlockFromDisk(addr=R_addr)
R_read_num += 1
R_bytesPtr = 0
if result_offset !=0:
result_next_addr = result_addr + 64
result_next_bytes_addr = IntToBytes(result_next_addr)
for i in range(4):
BUFFER.data[resultPtr + blkSize - 4 +i ] = result_next_bytes_addr[2*i:2*(i+1)]
BUFFER.writeBlockToDisk(resultPtr, './result/sort_merge_join/', result_addr)
BUFFER.freeBlockInBuffer(resultPtr)
print('The num of IO is', BUFFER.numIO)
BUFFER.freeBuffer()
def my_hash(n):
return n % BUCKET_NUM
def hash_Block(BASE_ADDR, BLOCK_NUM, HASH_BASE_ADDR):
addr = int(BASE_ADDR, 16)
hash_buckets = [(BUFFER.getNewBlockInBuffer(),0,int(HASH_BASE_ADDR, 16)) for i in range(BUCKET_NUM)]
for i in range(BLOCK_NUM):
blkPtr = BUFFER.readBlockFromDisk(addr=addr)
bytesPtr = 0
while bytesPtr < blkSize - 8:
A_bytes, B_bytes, bytesPtr = getBytes_A_B(blkPtr, bytesPtr)
t = my_hash(BytesToInt(A_bytes))
hash_buckets[t] = add_result(hash_buckets[t][0],hash_buckets[t][1],hash_buckets[t][2],'./hash/bucket'+str(t)+'/', A_bytes+ B_bytes)
addr = int(''.join(BUFFER.data[blkPtr + 56:blkPtr + 60]), 16)
BUFFER.freeBlockInBuffer(blkPtr)
for k in range(len(hash_buckets)):
resultPtr, result_offset, result_addr = hash_buckets[k]
if result_offset != 0:
result_next_addr = 0
result_next_bytes_addr = IntToBytes(result_next_addr)
for i in range(4):
BUFFER.data[resultPtr + blkSize - 8 + i] = result_next_bytes_addr[2 * i:2 * (i + 1)]
BUFFER.writeBlockToDisk(resultPtr, './hash/bucket'+str(k)+'/', result_addr)
BUFFER.freeBlockInBuffer(resultPtr)
else:
BUFFER.writeBlockToDisk(resultPtr, './hash/bucket'+str(k)+'/', result_addr)
BUFFER.freeBlockInBuffer(resultPtr)
def get_R_S(addr, i):
R_list = []
while addr != 0:
blkPtr = BUFFER.readBlockFromDisk(path='./hash/bucket' + str(i) + '/', addr=addr)
addr = int(''.join(BUFFER.data[blkPtr + 56: blkPtr + 60]), 16)
bytesPtr = 0
A = 10
while bytesPtr < blkSize - 8 and A > 0:
A_bytes, B_bytes, bytesPtr = getBytes_A_B(blkPtr, bytesPtr)
A = BytesToInt(A_bytes)
if A > 0:
R_list.append((A_bytes, B_bytes))
BUFFER.freeBlockInBuffer(blkPtr)
if A == 0:
break
return R_list
def hash_join():
hash_Block(R_BASE_ADDR, R_BLOCK_NUM, R_HASH_BASE_ADDR)
hash_Block(S_BASE_ADDR, S_BLOCK_NUM, S_HASH_BASE_ADDR)
BUFFER.freeBuffer()
resultPtr = BUFFER.getNewBlockInBuffer()
result_offset = 0
result_addr = int(RESULT_BASE_ADDR, 16)
for i in range(BUCKET_NUM):
R_addr = int(R_HASH_BASE_ADDR, 16)
S_addr = int(S_HASH_BASE_ADDR, 16)
R_list = get_R_S(R_addr, i)
S_list = get_R_S(S_addr, i)
for A_bytes, B_bytes in R_list:
for C_bytes, D_bytes in S_list:
if BytesToInt(A_bytes) == BytesToInt(C_bytes):
print('(A,C={},B={},D={})'.format(BytesToInt(A_bytes), BytesToInt(B_bytes), BytesToInt(D_bytes)))
resultPtr, result_offset, result_addr = add_result(resultPtr, result_offset, result_addr,
'./result/hash_join/',
A_bytes + B_bytes + D_bytes)
if result_offset !=0:
result_next_addr = result_addr + 64
result_next_bytes_addr = IntToBytes(result_next_addr)
for i in range(4):
BUFFER.data[resultPtr + blkSize - 4 +i ] = result_next_bytes_addr[2*i:2*(i+1)]
BUFFER.writeBlockToDisk(resultPtr, './result/nest_loop_join/', result_addr)
BUFFER.freeBlockInBuffer(resultPtr)
print('The num of IO is', BUFFER.numIO)
BUFFER.freeBuffer()
if __name__ == '__main__':
# nest_loop_join()
# sort_merge_join()
hash_join()