morningman commented on code in PR #26611:
URL: https://github.com/apache/doris/pull/26611#discussion_r1390434056
##########
be/src/vec/sink/vtablet_finder.cpp:
##########
@@ -95,8 +95,22 @@ Status OlapTabletFinder::find_tablets(RuntimeState* state,
Block* block, int row
if (_find_tablet_mode == FindTabletMode::FIND_TABLET_EVERY_ROW) {
_vpartition->find_tablets(block, qualified_rows, partitions,
tablet_index);
} else {
+ // for random distribution
Review Comment:
I think the following code can be removed?
https://github.com/apache/doris/blob/4230b8c36cac9636199eebb7c0adf82ee176b46e/be/src/exec/tablet_info.h#L211-L221
##########
be/src/vec/sink/vrow_distribution.cpp:
##########
@@ -269,7 +269,6 @@ Status VRowDistribution::generate_rows_distribution(
RETURN_IF_ERROR(_block_convertor->validate_and_convert_block(
_state, &input_block, block, *_vec_output_expr_ctxs, input_rows,
has_filtered_rows));
- _tablet_finder->clear_for_new_batch();
Review Comment:
Why remove this?
##########
be/src/vec/sink/vtablet_finder.cpp:
##########
@@ -95,8 +95,22 @@ Status OlapTabletFinder::find_tablets(RuntimeState* state,
Block* block, int row
if (_find_tablet_mode == FindTabletMode::FIND_TABLET_EVERY_ROW) {
_vpartition->find_tablets(block, qualified_rows, partitions,
tablet_index);
} else {
+ // for random distribution
_vpartition->find_tablets(block, qualified_rows, partitions,
tablet_index,
&_partition_to_tablet_map);
+ if (_find_tablet_mode == FindTabletMode::FIND_TABLET_EVERY_BATCH) {
Review Comment:
`FIND_TABLET_EVERY_BATCH` can save time because it only find tablets once
for each batch.
But after you change, it still iterate each row in batch to update the
partition's `load_tablet_idx`,
may it impact the performance?
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