HIVE-29177: Addendum: Fix ANTLR Warning (#6247)

ayushtkn · web-flow · commit e3cb93958ee4 · 2025-12-23T20:31:05.000+05:30
diff --git a/parser/src/java/org/apache/hadoop/hive/ql/parse/FromClauseParser.g b/parser/src/java/org/apache/hadoop/hive/ql/parse/FromClauseParser.g
@@ -235,11 +235,8 @@ databaseName
 @init { gParent.pushMsg("database name", state); }
 @after { gParent.popMsg(state); }
     :
-    catalog=identifier DOT db=identifier?
-    -> ^(TOK_DBNAME $catalog $db)
-    |
-    db=identifier
-    -> ^(TOK_DBNAME $db)
+    (catalog=identifier DOT)? db=identifier
+    -> ^(TOK_DBNAME $catalog? $db)
     ;
 
 tableName

Original file line number	Diff line number	Diff line change
`@@ -235,11 +235,8 @@ databaseName`
`235`	`235`	`@init { gParent.pushMsg("database name", state); }`
`236`	`236`	`@after { gParent.popMsg(state); }`
`237`	`237`	`:`
`238`		`- catalog=identifier DOT db=identifier?`
`239`		`- -> ^(TOK_DBNAME $catalog $db)`
`240`		`- \|`
`241`		`- db=identifier`
`242`		`- -> ^(TOK_DBNAME $db)`
	`238`	`+ (catalog=identifier DOT)? db=identifier`
	`239`	`+ -> ^(TOK_DBNAME $catalog? $db)`
`243`	`240`	`;`
`244`	`241`
`245`	`242`	`tableName`