Issue1673 case within brackets (#1675)

* fix: add missing public Getter

Add public Getter for `updateSets`
Fixes #1630

* fix: Case within brackets

fixes #1673

Author: manticore-projects

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -2251,10 +2251,17 @@ SelectExpressionItem SelectExpressionItem():
     Alias alias = null;
 }
 {
-      expression=Expression() { selectExpressionItem = new SelectExpressionItem(); selectExpressionItem.setExpression(expression); }
+      (
+        LOOKAHEAD( Condition() ) expression = Condition()
+        |
+        LOOKAHEAD( 3 ) expression = ConcatExpression()
+        |
+        expression=Expression()
+      ) { selectExpressionItem = new SelectExpressionItem(); selectExpressionItem.setExpression(expression); }
       [ LOOKAHEAD(2) alias=Alias() { selectExpressionItem.setAlias(alias); }] { return selectExpressionItem; }
 }
 
+
 SelectItem SelectItem() #SelectItem:
 {
     SelectItem selectItem = null;

src/test/java/net/sf/jsqlparser/expression/CaseExpressionTest.java

@@ -81,4 +81,29 @@ public void testCaseAndSwitch() throws JSQLParserException {
     public void testCaseOrSwitch() throws JSQLParserException {
         TestUtils.assertExpressionCanBeParsedAndDeparsed("CASE true OR false WHEN true THEN 1 ELSE 2 END", true);
     }
+
+    @Test
+    public void testCaseInsideBrackets() throws JSQLParserException {
+        String sqlStr = "SELECT ( CASE\n"
+                        + "            WHEN something\n"
+                        + "                THEN CASE\n"
+                        + "                     WHEN something2\n"
+                        + "                         THEN 1\n"
+                        + "                     ELSE 0\n"
+                        + "                     END + 1\n"
+                        + "            ELSE 0\n"
+                        + "        END ) + 1 \n"
+                        + "FROM test";
+
+        TestUtils.assertSqlCanBeParsedAndDeparsed(sqlStr, true);
+
+        sqlStr = "SELECT\n"
+                 + "(CASE WHEN FIELD_A=0 THEN FIELD_B\n"
+                 + "WHEN FIELD_C >FIELD_D  THEN (CASE WHEN FIELD_A>0 THEN\n"
+                 + "(FIELD_B)/(FIELD_A/(DATEDIFF(DAY,:started,:end)+1))\n"
+                 + "ELSE 0 END)-FIELD_D ELSE 0 END)*FIELD_A/(DATEDIFF(DAY,:started,:end)+1)  AS UNNECESSARY_COMPLEX_EXPRESSION\n"
+                 + "FROM TEST";
+
+        TestUtils.assertSqlCanBeParsedAndDeparsed(sqlStr, true);
+    }
 }