timing table structure

This table holds the list of each unique timing configuration timing_id for each signal in the model.

The signal the timing refers to is defined in signal and the identifier of the the timing among the other available for this signal is defined in timing.

The field phases identifies the number of corresponding records on Timing_Nested_Records, where object_id would be equal to this table’s timing_id.

cycle defines the total cycle time for this semaphore timing plan.

For now, offset is always equal to 0

Table Structure

Field	Type	NULL allowed	Default Value	Foreign key	Description
timing_id*	INTEGER	NO			timing identifier
signal	INTEGER	YES		Signal(signal)	signal (Signal table) which this timing refers to
timing	INTEGER	NO	0		index of the timing (within the same signal) of the timing
type	TEXT	NO	“TIMED”		type (TIMED, ACTUATED). Generally TIMED is used
cycle	INTEGER	NO	0		cycle time (SET by POLARIS as the sum of green + inter-greens across all nested records)
offset	INTEGER	NO	0		timing offset (applied based on cycle and start_time in signal table)
phases	INTEGER	NO	0		number of phases (set by POLARIS)

(* - Primary key)

The SQL statement for table and index creation is below.

create TABLE IF NOT EXISTS "Timing" (
    "timing_id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
    "signal"    INTEGER,
    "timing"    INTEGER NOT NULL DEFAULT 0,
    "type"      TEXT    NOT NULL DEFAULT "TIMED",
    "cycle"     INTEGER NOT NULL DEFAULT 0,
    "offset"    INTEGER NOT NULL DEFAULT 0,
    "phases"    INTEGER NOT NULL DEFAULT 0,

    CONSTRAINT "signal_fk" FOREIGN KEY("signal") REFERENCES "Signal"("signal") DEFERRABLE INITIALLY DEFERRED
);

CREATE INDEX IF NOT EXISTS "Timing_signal_i" ON "Timing" ("signal");
CREATE INDEX IF NOT EXISTS "Timing_timing_i" ON "Timing" ("timing");