yet another race condition fix to address bug:2456970

            mCompiledSql = new SQLiteCompiledSql(db, sql);

            // add it to the cache of compiled-sqls

            db.addToCompiledQueries(sql, mCompiledSql);

            // but before adding it and thus making it available for anyone else to use it,

            // make sure it is acquired by me.

            mCompiledSql.acquire();

            db.addToCompiledQueries(sql, mCompiledSql);

        } else {

            // it is already in compiled-sql cache.

            // try to acquire the object.