Madiator2011/lbry-sdk
1
0
Fork 0
forked from LBRYCommunity/lbry-sdk
Code Pull requests Activity

use LEFT JOIN instead of IN for faster get_block_range_without_filters()

Browse source
This commit is contained in:
Lex Berezhny 2020-09-21 22:04:50 -04:00
parent d10a88c79b
commit 082a91dc15
1 changed files with 4 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
lbry/blockchain/sync/blocks.py
View file

@ -251,8 +251,10 @@ def get_block_range_without_filters() -> Tuple[int, int]:
func.coalesce(func.min(BlockTable.c.height), -1).label('start_height'),
func.coalesce(func.max(BlockTable.c.height), -1).label('end_height'),
)
.select_from(BlockTable)
.where(BlockTable.c.height.notin_(select(BlockFilter.c.height)))
.select_from(
BlockTable.join(BlockFilter, BlockTable.c.height == BlockFilter.c.height, isouter=True)
)
.where(BlockFilter.c.height == None)
)
result = context().fetchone(sql)
return result['start_height'], result['end_height']