Fixed grammar ambiguity in CASE-WHEN

sdmx-twg · Oct 17, 2024 · 868ce55 · 868ce55
1 parent 238a0a2
commit 868ce55
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/v2.1/src/main/antlr4/org/sdmx/vtl/Vtl.g4 b/v2.1/src/main/antlr4/org/sdmx/vtl/Vtl.g4
@@ -26,7 +26,7 @@ expr:
     | left=expr op=AND right=expr                                           # booleanExpr
     | left=expr op=(OR|XOR) right=expr							            # booleanExpr
     | IF  conditionalExpr=expr  THEN thenExpr=expr ELSE elseExpr=expr       # ifExpr
-    | CASE (WHEN condExpr=expr THEN thenExpr=expr)+ ELSE elseExpr=expr      # caseExpr
+    | CASE (WHEN condExpr+=expr THEN thenExpr+=expr)+ ELSE elseExpr=expr    # caseExpr
     | constant														        # constantExpr
     | varID															        # varIdExpr
 
@@ -45,7 +45,7 @@ exprComponent:
     | left=exprComponent op=AND right=exprComponent                                                         # booleanExprComp
     | left=exprComponent op=(OR|XOR) right=exprComponent                                                    # booleanExprComp
     | IF  conditionalExpr=exprComponent  THEN thenExpr=exprComponent ELSE elseExpr=exprComponent            # ifExprComp
-    | CASE (WHEN condExpr=exprComponent THEN thenExpr=exprComponent)+ ELSE elseExpr=exprComponent           # caseExprComp
+    | CASE (WHEN condExpr+=exprComponent THEN thenExpr+=exprComponent)+ ELSE elseExpr=exprComponent         # caseExprComp
     | constant                                                                                              # constantExprComp
     | componentID                                                                                           # compId
 ;