fixes #149

Author: wumpz

README.md

@@ -35,6 +35,7 @@ Also I would like to know about needed examples or documentation stuff.
 
 ## Extensions in the latest SNAPSHOT version 0.9.4
 
+* allow **Server** within multipart names to act as database link
 * revived Apache Software License, Version 2.0
 * support for **row constructors in conditions**
 

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

@@ -24,20 +24,23 @@
 import java.util.regex.*;
 
 public final class Server implements MultiPartName {
+
     public static final Pattern SERVER_PATTERN = Pattern.compile("\\[([^\\]]+?)(?:\\\\([^\\]]+))?\\]");
 
     private String serverName;
     private String instanceName;
-
+    private String simpleName;
 
     public Server(String serverAndInstanceName) {
         if (serverAndInstanceName != null) {
             final Matcher matcher = SERVER_PATTERN.matcher(serverAndInstanceName);
             if (!matcher.find()) {
-                throw new IllegalArgumentException(String.format("%s is not a valid database reference", serverAndInstanceName));
+                //throw new IllegalArgumentException(String.format("%s is not a valid database reference", serverAndInstanceName));
+                simpleName = serverAndInstanceName;
+            } else {
+                setServerName(matcher.group(1));
+                setInstanceName(matcher.group(2));
             }
-            setServerName(matcher.group(1));
-            setInstanceName(matcher.group(2));
         }
     }
 
@@ -68,6 +71,8 @@ public String getFullyQualifiedName() {
             return String.format("[%s\\%s]", serverName, instanceName);
         } else if (serverName != null && !serverName.isEmpty()) {
             return String.format("[%s]", serverName);
+        } else if (simpleName != null && !simpleName.isEmpty()) {
+            return simpleName;
         } else {
             return "";
         }

src/test/java/net/sf/jsqlparser/schema/ServerTest.java

@@ -32,8 +32,8 @@ public void testServerNameParsing() throws Exception {
         final String fullServerName = String.format("[%s]", serverName);
         final Server server = new Server(fullServerName);
 
-        Assert.assertEquals(serverName, server.getServerName());
-        Assert.assertEquals(fullServerName, server.toString());
+        assertEquals(serverName, server.getServerName());
+        assertEquals(fullServerName, server.toString());
     }
 
     public void testServerNameAndInstanceParsing() throws Exception {
@@ -43,9 +43,9 @@ public void testServerNameAndInstanceParsing() throws Exception {
         final String fullServerName = String.format("[%s\\%s]", serverName, serverInstanceName);
         final Server server = new Server(fullServerName);
 
-        Assert.assertEquals(serverName, server.getServerName());
-        Assert.assertEquals(serverInstanceName, server.getInstanceName());
-        Assert.assertEquals(fullServerName, server.toString());
+        assertEquals(serverName, server.getServerName());
+        assertEquals(serverInstanceName, server.getInstanceName());
+        assertEquals(fullServerName, server.toString());
 
     }
 }

src/test/java/net/sf/jsqlparser/test/select/SelectTest.java

@@ -45,6 +45,11 @@ public void testMultiPartTableNameWithServerNameAndSchemaName() throws Exception
 
         assertStatementCanBeDeparsedAs(select, statement);
     }
+    
+    public void testMultiPartTableNameWithServerProblem() throws Exception {
+        final String statement = "SELECT * FROM LINK_100.htsac.dbo.t_transfer_num a";
+        assertSqlCanBeParsedAndDeparsed(statement);
+    }
 
     public void testMultiPartTableNameWithServerName() throws Exception {
         final String statement = "SELECT columnName FROM [server-name\\server-instance]...tableName";