https://pavelguzenfeld.com/tags/fast-dds/Recent content in Fast DDS on Pavel Guzenfeldhttps://pavelguzenfeld.com/images/og-default.pnghttps://pavelguzenfeld.com/images/og-default.pngHugoen-usSat, 04 Apr 2026 00:00:00 +0000https://pavelguzenfeld.com/posts/dds-content-filter-string-params-ros2/Sat, 04 Apr 2026 00:00:00 +0000https://pavelguzenfeld.com/posts/dds-content-filter-string-params-ros2/DDS content filter parameter substitution (%0, %1) silently fails for string fields in ROS 2 with Fast DDS. The root cause is three layers deep — the DDS SQL grammar requires quoted string literals, but no ROS 2 layer adds the quotes. Here’s how I traced it and where to fix it.