It is now longer allowed to create an index on a CLOB or BLOB column.

h2/src/main/org/h2/index/PageBtreeIndex.java

@@ -51,6 +51,9 @@ public class PageBtreeIndex extends PageIndex {
         store.addIndex(this);
         if (create) {
             // new index
+            if (!database.isStarting()) {
+                checkIndexColumnTypes(columns);
+            }
             rootPageId = store.allocatePage();
             needRebuild = true;
             // TODO currently the head position is stored in the log
@@ -74,6 +77,15 @@ public class PageBtreeIndex extends PageIndex {
         memoryPerPage = (Constants.MEMORY_PAGE_BTREE + store.getPageSize()) >> 2;
     }
 
+    private void checkIndexColumnTypes(IndexColumn[] columns) {
+        for (IndexColumn c : columns) {
+            int type = c.column.getType();
+            if (type == Value.CLOB || type == Value.BLOB) {
+                throw DbException.get(ErrorCode.FEATURE_NOT_SUPPORTED_1, "Index on BLOB or CLOB column: " + c.column.getCreateSQL());
+            }
+        }
+    }
+
     public void add(Session session, Row row) {
         if (trace.isDebugEnabled()) {
             trace.debug("{0} add {1}", getName(), row);

h2/src/test/org/h2/test/db/TestLob.java

@@ -53,6 +53,7 @@ public class TestLob extends TestBase {
     }
 
     public void test() throws Exception {
+        testCreateIndexOnLob();
         testBlobInputStreamSeek(true);
         testBlobInputStreamSeek(false);
         testDeadlock();
@@ -97,6 +98,22 @@ public class TestLob extends TestBase {
         IOUtils.deleteRecursive(TEMP_DIR, true);
     }
 
+    private void testCreateIndexOnLob() throws Exception {
+        deleteDb("lob");
+        Connection conn;
+        conn = getConnection("lob");
+        Statement stat = conn.createStatement();
+        stat.execute("create table test(id int, name clob)");
+        try {
+            stat.execute("create index idx_n on test(name)");
+            fail();
+        } catch (SQLException e) {
+            assertEquals(ErrorCode.FEATURE_NOT_SUPPORTED_1, e.getErrorCode());
+        }
+        stat.execute("drop table test");
+        conn.close();
+    }
+
     private void testBlobInputStreamSeek(boolean upgraded) throws Exception {
         deleteDb("lob");
         Connection conn;