|1| SIMPLE |testa| const |PRIMARY,idx_name| PRIMARY |4| const |1| NULL |+---+---+---+---+---+---+---+---+---+---+1rowinset# 下面虽然name有索引,但是查询的列cusno没有索引,这时mysql计划possible_keys有索引,但实际key未走索引,若果cusno换成有索引的列,参照下面。mysql> expl...
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Get the first block cost: the duration from the time when the start query phase ends to the time when the first record batch is returned. In some scenarios, the Get the first block cost is very close to or consistent with the Get result cost. For example, if a hash aggregate operator...
@incollection{NIPS2017_7062, title = {A Unified Approach to Interpreting Model Predictions}, author = {Lundberg, Scott M and Lee, Su-In}, booktitle = {Advances in Neural Information Processing Systems 30}, editor = {I. Guyon and U. V. Luxburg and S. Bengio and H. Wallach and R. ...
cuda.is_available() else "cpu") # Hyper parameters num_epochs = 15 batch_size = 128 learning_rate = 0.001 h5_file = "./data/test/tf_peaks_TEST_sparse_Remap.h5" if not os.path.exists(h5_file): os.system(f"zless {h5_file}.gz > {h5_file}") dataloaders, target_labels, train_...
│ vectorized batch count: 1 │ sql cpu time: 137µs │ estimated row count: 9 │ aggregate 0: avg(revenue) │ group by: city │ ordered: +city │ └── • scan columns: (city, revenue) ordering: +city nodes: n1 regions: us-east1 ...
CQJ0 is related to job scheduling, specifically for Oracle's Scheduler functionality, ensuring scheduled tasks like backups, maintenance, and batch processes are executed at the specified times or events. The checkpoint and data recovery: Recording the checkpoint is important for recovery purposes. ...
In JSON-formatted output, the value of using_join_buffer is always one of Block Nested Loop, Batched Key Access, or hash join. Hash joins are available beginning with MySQL 8.0.18; the Block Nested-Loop algorithm is not used in MySQL 8.0.20 or later MySQL releases. For more information...
SET 'table.exec.mini-batch.enabled' = 'true'; SET 'table.exec.mini-batch.allow-latency' = '5s'; SET 'table.exec.mini-batch.size' = '200'; SET 'table.optimizer.agg-phase-strategy' = 'ONE_PHASE'; CREATE TABLE alan_test_PLAN_ADVICE ( a BIGINT, b INT NOT NULL, c VARCHAR, d ...
Using join buffer (Block Nested Loop), Using joinbuffer (Batched Key Access) (JSON property:using_join_buffer) 将join前面的表的一部分放到join buffer中,然后用buffer中的记录跟当前表执行join操作。(Block Nested Loop) 表示使用Block Nested-Loop算法,(Batched Key Access) 表示使用Batched Key Access算...