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Untested revision of schema as of 11:50 AM

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John Poole 2026-05-27 11:51:30 -07:00
commit ff7c6fa0ad
1 changed files with 16 additions and 15 deletions
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31
exercises/26_Bluetooth_discover/scripts/create_exercise_26_ble_schema.sql
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@ -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;