fix: avoid NPE

Signed-off-by: Andreas Reichel <[email protected]>

Author: manticore-projects

src/main/java/net/sf/jsqlparser/schema/Column.java

@@ -244,7 +244,8 @@ public Table getResolvedTable() {
      */
     public Column setResolvedTable(Table resolvedTable) {
         // clone, not reference
-        this.resolvedTable = new Table(resolvedTable.getFullyQualifiedName());
+        this.resolvedTable =
+                resolvedTable != null ? new Table(resolvedTable.getFullyQualifiedName()) : null;
         return this;
     }
 }

src/main/java/net/sf/jsqlparser/schema/Table.java

@@ -514,13 +514,8 @@ public static Table[] setUnsetCatalogAndSchema(String currentCatalogName,
 
     @Override
     public Table clone() {
-        try {
-            Table clone = (Table) super.clone();
-            clone.setName(this.getFullyQualifiedName());
-            clone.setResolvedTable(this.resolvedTable);
-            return clone;
-        } catch (CloneNotSupportedException e) {
-            throw new AssertionError();
-        }
+        Table clone = new Table(this.getFullyQualifiedName());
+        clone.setResolvedTable(this.resolvedTable != null ? this.resolvedTable.clone() : null);
+        return clone;
     }
 }