MaxCompute tasks contain computational tasks and non-computational tasks.

Alibaba Cloud ACA-BigData1 Question Answer

MaxCompute tasks contain computational tasks and non-computational tasks. The

computational tasks require actual operations on data stored in the table. MaxCompute

parses the task to obtain its execution plan, and submits the task for execution. The noncomputational

tasks require substantial reading of and modification to metadata

information. Therefore, the task is not parsed, and no execution plan is provided. The

task is directly submitted for execution. The latter one has a faster response speed than

the former one. Which of the following operations on the table t_test is a computational

task?

desc t_test

alter table t_test add columns (comments string);

select count(*) from t_test;

truncate table t_test;

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