From ff7c6fa0adf162a1181d2fc11d8f971e43ca85ca Mon Sep 17 00:00:00 2001 From: John Poole Date: Wed, 27 May 2026 11:51:30 -0700 Subject: [PATCH] Untested revision of schema as of 11:50 AM --- .../scripts/create_exercise_26_ble_schema.sql | 31 ++++++++++--------- 1 file changed, 16 insertions(+), 15 deletions(-) diff --git a/exercises/26_Bluetooth_discover/scripts/create_exercise_26_ble_schema.sql b/exercises/26_Bluetooth_discover/scripts/create_exercise_26_ble_schema.sql index 112b240..839a3bb 100644 --- a/exercises/26_Bluetooth_discover/scripts/create_exercise_26_ble_schema.sql +++ b/exercises/26_Bluetooth_discover/scripts/create_exercise_26_ble_schema.sql @@ -5,6 +5,7 @@ -- sqlite3 ble_fieldtest_YYYYMMDD_HHMM.sqlite < create_exercise_26_ble_schema.sql -- -- SQLite schema for Exercise 26 BLE Discovery field-test logs. +-- 20260527_1156: aligned derived delta column name with importer: rx_tx_delta_ms. -- -- This schema targets the current 19-column Exercise 26 log format only. -- @@ -27,7 +28,7 @@ -- advertising payload was generated/configured. It is not a per-RF-packet -- transmit timestamp. -- --- rx_tx_payload_delta_ms is diagnostic only. It is useful for clock, +-- rx_tx_delta_ms is diagnostic only. It is useful for clock, -- scheduling, payload-age, and repeated-observation analysis. It is not -- BLE propagation delay. -- @@ -197,7 +198,7 @@ ON ble_observation_raw(clock_valid, gps_valid, gps_fix_age_ms); -- -- Parsed and normalized BLE observation table. -- --- rx_tx_payload_delta_ms is the receiver row timestamp minus the sender +-- rx_tx_delta_ms is the receiver row timestamp minus the sender -- payload-generation timestamp. It is diagnostic only. -- --------------------------------------------------------------------------- @@ -217,7 +218,7 @@ CREATE TABLE IF NOT EXISTS ble_observation ( tx_payload_epoch_ms INTEGER, tx_payload_epoch_s REAL, - rx_tx_payload_delta_ms INTEGER, + rx_tx_delta_ms INTEGER, receiver TEXT NOT NULL REFERENCES unit(unit_name), heard TEXT NOT NULL REFERENCES unit(unit_name), @@ -269,7 +270,7 @@ CREATE INDEX IF NOT EXISTS idx_obs_validity ON ble_observation(clock_valid, gps_valid, gps_fix_age_ms); CREATE INDEX IF NOT EXISTS idx_obs_payload_time -ON ble_observation(tx_payload_epoch_ms, rx_tx_payload_delta_ms); +ON ble_observation(tx_payload_epoch_ms, rx_tx_delta_ms); -- --------------------------------------------------------------------------- -- v_log_file_summary @@ -378,7 +379,7 @@ GROUP BY trial_id, receiver, heard; -- -- Per receiver/heard timing-delta summary. -- --- rx_tx_payload_delta_ms is useful for detecting clock disagreement, +-- rx_tx_delta_ms is useful for detecting clock disagreement, -- scheduling, repeated payload observations, and payload-age behavior. -- It is not RF propagation delay. -- --------------------------------------------------------------------------- @@ -391,9 +392,9 @@ SELECT COUNT(*) AS observation_count, - MIN(rx_tx_payload_delta_ms) AS min_rx_tx_payload_delta_ms, - AVG(rx_tx_payload_delta_ms) AS avg_rx_tx_payload_delta_ms, - MAX(rx_tx_payload_delta_ms) AS max_rx_tx_payload_delta_ms + MIN(rx_tx_delta_ms) AS min_rx_tx_delta_ms, + AVG(rx_tx_delta_ms) AS avg_rx_tx_delta_ms, + MAX(rx_tx_delta_ms) AS max_rx_tx_delta_ms FROM ble_observation WHERE tx_payload_epoch_ms IS NOT NULL AND tx_payload_epoch_ms > 0 @@ -410,9 +411,9 @@ SELECT heard, payload_seq, COUNT(*) AS observations, - MIN(rx_tx_payload_delta_ms) AS min_delta_ms, - AVG(rx_tx_payload_delta_ms) AS avg_delta_ms, - MAX(rx_tx_payload_delta_ms) AS max_delta_ms, + MIN(rx_tx_delta_ms) AS min_delta_ms, + AVG(rx_tx_delta_ms) AS avg_delta_ms, + MAX(rx_tx_delta_ms) AS max_delta_ms, MIN(rx_epoch_ms) AS first_rx_epoch_ms, MAX(rx_epoch_ms) AS last_rx_epoch_ms FROM ble_observation @@ -454,9 +455,9 @@ SELECT MIN(rx_epoch_ms) AS first_rx_epoch_ms, MAX(rx_epoch_ms) AS last_rx_epoch_ms, MAX(rx_epoch_ms) - MIN(rx_epoch_ms) AS rx_spread_ms, - MIN(rx_tx_payload_delta_ms) AS min_delta_ms, - AVG(rx_tx_payload_delta_ms) AS avg_delta_ms, - MAX(rx_tx_payload_delta_ms) AS max_delta_ms + MIN(rx_tx_delta_ms) AS min_delta_ms, + AVG(rx_tx_delta_ms) AS avg_delta_ms, + MAX(rx_tx_delta_ms) AS max_delta_ms FROM ble_observation WHERE tx_payload_epoch_ms IS NOT NULL AND tx_payload_epoch_ms > 0 @@ -525,7 +526,7 @@ SELECT avg_rssi, payload_seq, tx_payload_epoch_ms, - rx_tx_payload_delta_ms + rx_tx_delta_ms FROM ble_observation WHERE rx_lat IS NOT NULL AND rx_lon IS NOT NULL;