Start implementing function synonyms.

h2/src/main/org/h2/command/ddl/CreateSynonym.java

@@ -8,6 +8,7 @@ package org.h2.command.ddl;
 import org.h2.api.ErrorCode;
 import org.h2.command.CommandInterface;
 import org.h2.engine.Database;
+import org.h2.engine.FunctionAlias;
 import org.h2.engine.Session;
 import org.h2.message.DbException;
 import org.h2.schema.Schema;
@@ -54,14 +55,12 @@ public class CreateSynonym extends SchemaCommand {
         }
         Database db = session.getDatabase();
         data.session = session;
-        // TODO: Check when/if meta data is unlocked...
         db.lockMeta(session);
 
-        // This call throws an exception if the table does not exist.
         if (data.synonymForSchema.findTableOrView(session, data.synonymFor) != null) {
             return createTableSynonym(db);
         } else if (data.synonymForSchema.findFunction(data.synonymFor) != null) {
-            // TODO Implement function synonym
+            return createFunctionSynonym(db);
         } else if (data.synonymForSchema.findSequence(data.synonymFor) != null) {
             // TODO Implement sequence synonym
         }
@@ -71,6 +70,34 @@ public class CreateSynonym extends SchemaCommand {
 
     }
 
+    private int createFunctionSynonym(Database db) {
+        FunctionAlias old = getSchema().findFunction(data.synonymName);
+//        if (old != null) {
+//            if (orReplace && old instanceof TableSynonym) {
+//                // ok, we replacing the existing synonym
+//            } else if (ifNotExists && old instanceof TableSynonym) {
+//                return 0;
+//            } else {
+//                throw DbException.get(ErrorCode.TABLE_OR_VIEW_ALREADY_EXISTS_1, data.synonymName);
+//            }
+//        }
+//
+//        TableSynonym table;
+//        if (old != null) {
+//            table = (TableSynonym) old;
+//            data.schema = table.getSchema();
+//            table.updateData(data);
+//            table.setModified();
+//        } else {
+//            data.id = getObjectId();
+//            table = getSchema().createSynonym(data);
+//            table.setComment(comment);
+//            db.addSchemaObject(session, table);
+//        }
+
+        return 0;
+    }
+
     private int createTableSynonym(Database db) {
         Table old = getSchema().findTableOrView(session, data.synonymName);
         if (old != null) {
@@ -84,7 +111,6 @@ public class CreateSynonym extends SchemaCommand {
         }
 
         TableSynonym table;
-
         if (old != null) {
             table = (TableSynonym) old;
             data.schema = table.getSchema();
@@ -94,7 +120,6 @@ public class CreateSynonym extends SchemaCommand {
             data.id = getObjectId();
             table = getSchema().createSynonym(data);
             table.setComment(comment);
-
             db.addSchemaObject(session, table);
         }
 

h2/src/main/org/h2/engine/FunctionSynonym.java

+package org.h2.engine;
+
+/**
+ * Created by jiriki on 24.04.16.
+ */
+public class FunctionSynonym {
+}