electricity provider pricing table structure

Provides ability to vary electricity costs by flexible time periods for each utility. It is linked to the Electricity_Provider table through a fk on station_id. unit_price is the cost per kWh for certain types of pricing, and cost overall for others expressed in dollars

Not required by all models and is okay to be empty.

Table Structure

Field	Type	NULL allowed	Default Value	Foreign key	Description
id*	INTEGER	NO			Primary key referencing the pricing strategy used
Provider_ID	INTEGER	NO		Electricity_Provider(Provider_ID)	Foreign key to electricity provider who is enforcing pricing strategy
type	TEXT	NO			Type of pricing strategy enforced. Can be one of THE ENUM IS THIS< BUT IT IS NOT WORKING @Electricity_Pricing_Type@
start_seconds	INTEGER	NO			Simulation time in seconds for when pricing strategy starts being enforced
end_seconds	INTEGER	NO			Simulation time in seconds for when pricing strategy stops being enforced
unit_price	REAL	NO			Cost in $ as applied by the type suggested above

(* - Primary key)

The SQL statement for table and index creation is below.

CREATE TABLE IF NOT EXISTS "Electricity_Provider_Pricing"(
    id INTEGER NOT NULL PRIMARY KEY,
    Provider_ID INTEGER NOT NULL,
    "type" TEXT NOT NULL,
    start_seconds INTEGER NOT NULL,
    end_seconds INTEGER NOT NULL,
    unit_price REAL NOT NULL,
    CONSTRAINT "fk_prov_id" FOREIGN KEY("Provider_ID") REFERENCES Electricity_Provider("Provider_ID") DEFERRABLE INITIALLY DEFERRED
);