Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/12991#discussion_r62437296 --- 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 -- **Case 3: Explain with an option Logical:** ``` hive> explain logical select * from t1; OK ABSTRACT SYNTAX TREE: TOK_QUERY TOK_FROM TOK_TABREF TOK_TABNAME t1 TOK_INSERT TOK_DESTINATION TOK_DIR TOK_TMP_FILE TOK_SELECT TOK_SELEXPR TOK_ALLCOLREF LOGICAL PLAN: t1 TableScan (TS_0) alias: t1 Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE Select Operator (SEL_1) expressions: col (type: int) outputColumnNames: _col0 Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL Column stats: NONE ListSink (OP_3) Time taken: 0.041 seconds, Fetched: 27 row(s) ```
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