Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/12991#discussion_r62437280 --- Diff: sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 --- @@ -92,7 +92,7 @@ statement | CREATE TEMPORARY? FUNCTION qualifiedName AS className=STRING (USING resource (',' resource)*)? #createFunction | DROP TEMPORARY? FUNCTION (IF EXISTS)? qualifiedName #dropFunction - | EXPLAIN explainOption* statement #explain + | EXPLAIN (LOGICAL | FORMATTED | EXTENDED | CODEGEN)? statement #explain --- End diff -- FYI, **Case 1: Explain without any option:** ``` hive> explain select * from t1; OK STAGE DEPENDENCIES: Stage-0 is a root stage STAGE PLANS: Stage: Stage-0 Fetch Operator limit: -1 Processor Tree: TableScan alias: t1 Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE Select Operator expressions: col (type: int) outputColumnNames: _col0 Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE ListSink Time taken: 0.756 seconds, Fetched: 17 row(s) ```
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