fixes #221

Author: wumpz

src/main/java/net/sf/jsqlparser/statement/alter/Alter.java

@@ -26,7 +26,7 @@
 import net.sf.jsqlparser.statement.Statement;
 import net.sf.jsqlparser.statement.StatementVisitor;
 import net.sf.jsqlparser.statement.create.table.ColDataType;
-import net.sf.jsqlparser.statement.create.table.ForeignKeyIndex;
+import net.sf.jsqlparser.statement.create.table.Index;
 import net.sf.jsqlparser.statement.select.PlainSelect;
 
 /**
@@ -41,7 +41,7 @@ public class Alter implements Statement {
     private List<String> pkColumns;
     private List<String> ukColumns;
     private String ukName;
-    private ForeignKeyIndex fkIndex = null;
+    private Index index = null;
 	private String operation;
     private String constraintName;
     private boolean onDeleteRestrict;
@@ -168,12 +168,12 @@ public void accept(StatementVisitor statementVisitor) {
         statementVisitor.visit(this);
     }
 
-    public ForeignKeyIndex getFkIndex() {
-        return fkIndex;
+    public Index getIndex() {
+        return index;
     }
 
-    public void setFkIndex(ForeignKeyIndex fkIndex) {
-        this.fkIndex = fkIndex;
+    public void setIndex(Index index) {
+        this.index = index;
     }
 
     @Override
@@ -201,8 +201,8 @@ public String toString() {
             } else if (isOnDeleteSetNull()) {
                 b.append(" ON DELETE SET NULL");
             }
-		} else if (fkIndex != null) {
-			b.append(fkIndex);
+		} else if (index != null) {
+			b.append(index);
 		}
 		return b.toString();
     }

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

@@ -2855,6 +2855,7 @@ Alter Alter():
 	ColDataType dataType;
     List<String> columnNames = null;
     ForeignKeyIndex fkIndex = null;
+    NamedConstraint index = null;
     Table fkTable = null;
     Token alterDrop = null;
 }
@@ -2889,22 +2890,34 @@ Alter Alter():
         )
         |
         (
-            {
-                fkIndex = new ForeignKeyIndex();
-            }
-            <K_CONSTRAINT> sk3=RelObjectName() {fkIndex.setName(sk3);}
-            tk=<K_FOREIGN> tk2=<K_KEY>
+            <K_CONSTRAINT> sk3=RelObjectName() 
+
+            ( ( tk=<K_FOREIGN> tk2=<K_KEY> 
                 columnNames=ColumnsNamesList()
                 {
+                    fkIndex = new ForeignKeyIndex();
+                    fkIndex.setName(sk3);
                     fkIndex.setType(tk.image + " " + tk2.image);
                     fkIndex.setColumnsNames(columnNames);
                 }
                 <K_REFERENCES> fkTable=Table() columnNames=ColumnsNamesList()
                 {
                     fkIndex.setTable(fkTable);
                     fkIndex.setReferencedColumnNames(columnNames);
-                    alter.setFkIndex(fkIndex);
+                    alter.setIndex(fkIndex);
+                }
+            )
+            |
+            ( tk=<K_PRIMARY> tk2=<K_KEY> 
+                columnNames=ColumnsNamesList()
+                {
+                    index = new NamedConstraint();
+                    index.setName(sk3);
+                    index.setType(tk.image + " " + tk2.image);
+                    index.setColumnsNames(columnNames);
+                    alter.setIndex(index);
                 }
+            ) )
         )
         )
     )

src/test/java/net/sf/jsqlparser/test/alter/AlterTest.java

@@ -7,6 +7,9 @@
 import net.sf.jsqlparser.statement.Statement;
 import net.sf.jsqlparser.statement.alter.Alter;
 import static net.sf.jsqlparser.test.TestUtils.assertSqlCanBeParsedAndDeparsed;
+import static net.sf.jsqlparser.test.TestUtils.assertSqlCanBeParsedAndDeparsed;
+import static net.sf.jsqlparser.test.TestUtils.assertSqlCanBeParsedAndDeparsed;
+import static net.sf.jsqlparser.test.TestUtils.assertSqlCanBeParsedAndDeparsed;
 
 public class AlterTest extends TestCase {
 
@@ -58,4 +61,8 @@ public void testAlterTableDropColumn() throws JSQLParserException {
     public void testAlterTableDropConstraint() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed("ALTER TABLE test DROP CONSTRAINT YYY");
     }
+    
+    public void testAlterTablePK() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed("ALTER TABLE `Author` ADD CONSTRAINT `AuthorPK` PRIMARY KEY (`ID`)");
+    }
 }