Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/12991#discussion_r62437307
--- 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 4: Explain with an option Formatted:**
```
hive> explain formatted select * from t1;
OK
{"STAGE PLANS":{"Stage-0":{"Fetch Operator":{"limit:":"-1","Processor
Tree:":{"TableScan":{"alias:":"t1","children":{"Select
Operator":{"expressions:":"col (type:
int)","outputColumnNames:":["_col0"],"children":{"ListSink":{}},"Statistics:":"Num
rows: 1 Data size: 0 Basic stats: PARTIAL Column stats:
NONE"}},"Statistics:":"Num rows: 1 Data size: 0 Basic stats: PARTIAL Column
stats: NONE"}}}}},"STAGE DEPENDENCIES":{"Stage-0":{"ROOT STAGE":"TRUE"}}}
```
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