Noemi Pap-Takacs created IMPALA-13074:
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Summary: WRITE TO HDFS node is omitted from Web UI graphic plan
Key: IMPALA-13074
URL: https://issues.apache.org/jira/browse/IMPALA-13074
Project: IMPALA
Issue Type: Bug
Reporter: Noemi Pap-Takacs
The query plan shows the nodes that take part in the execution, forming a tree
structure.
It can be displayed in the CLI by issuing the EXPLAIN <query> command. When the
actual query is executed, the plan tree can also be viewed in the Impala Web UI
in a graphic form.
However, the explain string and the graphic plan tree does not match: the top
node is missing from the Web UI.
This is especially confusing in case of DDL and DML statements, where the Data
Sink is not displayed. This makes a SELECT * FROM table indistinguishable from
a CREATE TABLE, since both only displays the SCAN node and omit the
WRITE_TO_HDFS and SELECT node.
It would make sense to include the WRITE_TO_HDFS node in DML/DDL plans.
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