Index: ext/ota/ota3.test
==================================================================
--- ext/ota/ota3.test
+++ ext/ota/ota3.test
@@ -73,7 +73,31 @@
 
 do_execsql_test 2.2 {
   PRAGMA integrity_check;
 } {ok}
 
+#--------------------------------------------------------------------
+# Test that missing columns are detected.
+#
+forcedelete ota.db
+reset_db
+
+do_execsql_test 2.0 {
+  CREATE TABLE x1(a INTEGER PRIMARY KEY, b, c);
+  CREATE INDEX i1 ON x1(b, c);
+} {}
+
+do_test 2.1 {
+  sqlite3 db2 ota.db
+  db2 eval {
+    CREATE TABLE data_x1(a, b, ota_control);
+    INSERT INTO data_x1 VALUES(1, 'a', 0);
+  }
+  db2 close
+  list [catch { run_ota test.db ota.db } msg] $msg
+} {1 {SQLITE_ERROR - no such column: c}}
+
+do_execsql_test 2.2 {
+  PRAGMA integrity_check;
+} {ok}
 
 finish_test

Index: ext/ota/sqlite3ota.c
==================================================================
--- ext/ota/sqlite3ota.c
+++ ext/ota/sqlite3ota.c
@@ -297,11 +297,11 @@
 /*
 ** Allocate a buffer and populate it with the double-quoted version of the
 ** string in the argument buffer, suitable for use as an SQL identifier. 
 ** For example:
 **
-**      [quick "brown" fox]    ->    ["quick ""brown"" fox"]
+**      [quick `brown` fox]    ->    [`quick ``brown`` fox`]
 **
 ** Assuming the allocation is successful, a pointer to the new buffer is 
 ** returned. It is the responsibility of the caller to free it using 
 ** sqlite3_free() at some point in the future. Or, if the allocation fails,
 ** a NULL pointer is returned.
@@ -310,16 +310,16 @@
   int nName = strlen(zName);
   char *zRet = sqlite3_malloc(nName * 2 + 2 + 1);
   if( zRet ){
     int i;
     char *p = zRet;
-    *p++ = '"';
+    *p++ = '`';
     for(i=0; i<nName; i++){
-      if( zName[i]=='"' ) *p++ = '"';
+      if( zName[i]=='`' ) *p++ = '`';
       *p++ = zName[i];
     }
-    *p++ = '"';
+    *p++ = '`';
     *p++ = '\0';
   }
   return zRet;
 }