cloud-fan commented on code in PR #52638:
URL: https://github.com/apache/spark/pull/52638#discussion_r2443712396
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sql/api/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBaseParser.g4:
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@@ -1682,19 +1696,26 @@ alterColumnAction
| dropDefault=DROP DEFAULT
;
+// Matches one or more string literals (single or double-quoted) without
parameter markers.
+// Multiple consecutive literals are coalesced into a single string.
stringLitWithoutMarker
- : STRING_LITERAL
#stringLiteralValue
- | {!double_quoted_identifiers}? DOUBLEQUOTED_STRING
#doubleQuotedStringLiteralValue
-;
+ : (STRING_LITERAL | {!double_quoted_identifiers}? DOUBLEQUOTED_STRING)+
+ ;
+
+// Matches exactly one string literal without coalescing or parameter markers.
+// Used in type constructors where coalescing is not allowed.
+singleStringLit
Review Comment:
```suggestion
singleStringLitWithoutMarker
```
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