--- Table structures

PRAGMA page_size = 4096;
PRAGMA foreign_keys = 1;

CREATE TABLE metadata(
    key TEXT NOT NULL PRIMARY KEY CHECK (length(key) >= 1),
    value TEXT NOT NULL
);

CREATE TABLE unit_of_measure(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    type TEXT NOT NULL CHECK (type IN ('length', 'angle', 'scale', 'time')),
    conv_factor FLOAT,
    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),
    CONSTRAINT pk_unit_of_measure PRIMARY KEY (auth_name, code)
);

CREATE TABLE celestial_body (
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    semi_major_axis FLOAT NOT NULL CHECK (semi_major_axis > 0), -- approximate (in metre)
    CONSTRAINT pk_celestial_body PRIMARY KEY (auth_name, code)
);

INSERT INTO celestial_body VALUES('PROJ', 'EARTH', 'Earth', 6378137.0);

CREATE TABLE ellipsoid (
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    description TEXT,
    celestial_body_auth_name TEXT NOT NULL,
    celestial_body_code TEXT NOT NULL,
    semi_major_axis FLOAT NOT NULL CHECK (semi_major_axis > 0),
    uom_auth_name TEXT NOT NULL,
    uom_code TEXT NOT NULL,
    inv_flattening FLOAT CHECK (inv_flattening = 0 OR inv_flattening >= 1.0),
    semi_minor_axis FLOAT CHECK (semi_minor_axis > 0 AND semi_minor_axis <= semi_major_axis),
    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),
    CONSTRAINT pk_ellipsoid PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_ellipsoid_celestial_body FOREIGN KEY (celestial_body_auth_name, celestial_body_code) REFERENCES celestial_body(auth_name, code),
    CONSTRAINT fk_ellipsoid_unit_of_measure FOREIGN KEY (uom_auth_name, uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT check_ellipsoid_inv_flattening_semi_minor_mutually_exclusive CHECK ((inv_flattening IS NULL AND semi_minor_axis IS NOT NULL) OR (inv_flattening IS NOT NULL AND semi_minor_axis IS NULL))
);

CREATE TRIGGER ellipsoid_insert_trigger
BEFORE INSERT ON ellipsoid
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on ellipsoid violates constraint: uom should be of type ''length''')
        WHERE (SELECT type FROM unit_of_measure WHERE auth_name = NEW.uom_auth_name AND code = NEW.uom_code) != 'length';
END;

CREATE TABLE area(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    description TEXT NOT NULL,
    south_lat FLOAT CHECK (south_lat BETWEEN -90 AND 90),
    north_lat FLOAT CHECK (north_lat BETWEEN -90 AND 90),
    west_lon FLOAT CHECK (west_lon BETWEEN -180 AND 180),
    east_lon FLOAT CHECK (east_lon BETWEEN -180 AND 180),
    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),
    CONSTRAINT pk_area PRIMARY KEY (auth_name, code),
    CONSTRAINT check_area_lat CHECK (south_lat <= north_lat)
);

CREATE TABLE prime_meridian(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    longitude FLOAT NOT NULL CHECK (longitude BETWEEN -180 AND 180),
    uom_auth_name TEXT NOT NULL,
    uom_code TEXT NOT NULL,
    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),
    CONSTRAINT pk_prime_meridian PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_prime_meridian_unit_of_measure FOREIGN KEY (uom_auth_name, uom_code) REFERENCES unit_of_measure(auth_name, code)
);

CREATE TRIGGER prime_meridian_insert_trigger
BEFORE INSERT ON prime_meridian
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on prime_meridian violates constraint: uom should be of type ''angle''')
        WHERE (SELECT type FROM unit_of_measure WHERE auth_name = NEW.uom_auth_name AND code = NEW.uom_code) != 'angle';
END;

CREATE TABLE geodetic_datum (
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    description TEXT,
    scope TEXT,
    ellipsoid_auth_name TEXT NOT NULL,
    ellipsoid_code TEXT NOT NULL,
    prime_meridian_auth_name TEXT NOT NULL,
    prime_meridian_code TEXT NOT NULL,
    area_of_use_auth_name TEXT NOT NULL,
    area_of_use_code TEXT NOT NULL,
    publication_date TEXT, --- YYYY-MM-DD format
    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),
    CONSTRAINT pk_geodetic_datum PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_geodetic_datum_ellipsoid FOREIGN KEY (ellipsoid_auth_name, ellipsoid_code) REFERENCES ellipsoid(auth_name, code),
    CONSTRAINT fk_geodetic_datum_prime_meridian FOREIGN KEY (prime_meridian_auth_name, prime_meridian_code) REFERENCES prime_meridian(auth_name, code),
    CONSTRAINT fk_geodetic_datum_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code)
);

CREATE TRIGGER geodetic_datum_insert_trigger
BEFORE INSERT ON geodetic_datum
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on geodetic_datum violates constraint: ellipsoid must not be deprecated when geodetic_datum is not deprecated')
        WHERE EXISTS(SELECT 1 FROM ellipsoid WHERE ellipsoid.auth_name = NEW.ellipsoid_auth_name AND ellipsoid.code = NEW.ellipsoid_code AND ellipsoid.deprecated != 0) AND NEW.deprecated = 0;
    SELECT RAISE(ABORT, 'insert on geodetic_datum violates constraint: prime_meridian must not be deprecated when geodetic_datum is not deprecated')
        WHERE EXISTS(SELECT 1 FROM prime_meridian WHERE prime_meridian.auth_name = NEW.prime_meridian_auth_name AND prime_meridian.code = NEW.prime_meridian_code AND prime_meridian.deprecated != 0) AND NEW.deprecated = 0;
    SELECT RAISE(ABORT, 'insert on geodetic_datum violates constraint: area_of_use must not be deprecated when geodetic_datum is not deprecated')
        WHERE EXISTS(SELECT 1 FROM area WHERE area.auth_name = NEW.area_of_use_auth_name AND area.code = NEW.area_of_use_code AND area.deprecated != 0) AND NEW.deprecated = 0;
END;

CREATE TABLE vertical_datum (
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    description TEXT,
    scope TEXT,
    area_of_use_auth_name TEXT NOT NULL,
    area_of_use_code TEXT NOT NULL,
    publication_date TEXT CHECK (NULL OR length(publication_date) = 10), --- YYYY-MM-DD format
    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),
    CONSTRAINT pk_vertical_datum PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_vertical_datum_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code)
);

CREATE TRIGGER vertical_datum_insert_trigger
BEFORE INSERT ON vertical_datum
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on vertical_datum violates constraint: area_of_use must not be deprecated when vertical_datum is not deprecated')
        WHERE EXISTS(SELECT 1 FROM area WHERE area.auth_name = NEW.area_of_use_auth_name AND area.code = NEW.area_of_use_code AND area.deprecated != 0) AND NEW.deprecated = 0;
END;

CREATE TABLE coordinate_system(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    type TEXT NOT NULL CHECK (type IN ('Cartesian', 'vertical', 'ellipsoidal', 'spherical')),
    dimension SMALLINT NOT NULL CHECK (dimension BETWEEN 1 AND 3),
    CONSTRAINT pk_coordinate_system PRIMARY KEY (auth_name, code),
    CONSTRAINT check_cs_vertical CHECK (type != 'vertical' OR dimension = 1),
    CONSTRAINT check_cs_cartesian CHECK (type != 'Cartesian' OR dimension IN (2,3)),
    CONSTRAINT check_cs_ellipsoidal CHECK (type != 'ellipsoidal' OR dimension IN (2,3))
);

CREATE TABLE axis(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    abbrev TEXT NOT NULL,
    orientation TEXT NOT NULL,
    coordinate_system_auth_name TEXT NOT NULL,
    coordinate_system_code TEXT NOT NULL,
    coordinate_system_order SMALLINT NOT NULL CHECK (coordinate_system_order BETWEEN 1 AND 3),
    uom_auth_name TEXT NOT NULL,
    uom_code TEXT NOT NULL,
    CONSTRAINT pk_axis PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_axis_coordinate_system FOREIGN KEY (coordinate_system_auth_name, coordinate_system_code) REFERENCES coordinate_system(auth_name, code),
    CONSTRAINT fk_axis_unit_of_measure FOREIGN KEY (uom_auth_name, uom_code) REFERENCES unit_of_measure(auth_name, code)
);

CREATE TRIGGER axis_insert_trigger
BEFORE INSERT ON axis
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on axis violates constraint: coordinate_system_order should be <= coordinate_system.dimension')
        WHERE NEW.coordinate_system_order > (SELECT dimension FROM coordinate_system WHERE auth_name = NEW.coordinate_system_auth_name AND code = NEW.coordinate_system_code);
END;

CREATE TABLE geodetic_crs(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    description TEXT,
    scope TEXT,
    type TEXT NOT NULL CHECK (type IN ('geographic 2D', 'geographic 3D', 'geocentric')),
    coordinate_system_auth_name TEXT,
    coordinate_system_code TEXT,
    datum_auth_name TEXT,
    datum_code TEXT,
    area_of_use_auth_name TEXT,
    area_of_use_code TEXT,
    text_definition TEXT, -- PROJ string or WKT string. Use of this is discouraged as prone to definition ambiguities
    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),
    CONSTRAINT pk_geodetic_crs PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_geodetic_crs_coordinate_system FOREIGN KEY (coordinate_system_auth_name, coordinate_system_code) REFERENCES coordinate_system(auth_name, code),
    CONSTRAINT fk_geodetic_crs_datum FOREIGN KEY (datum_auth_name, datum_code) REFERENCES geodetic_datum(auth_name, code),
    CONSTRAINT fk_geodetic_crs_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code),
    CONSTRAINT check_geodetic_crs_cs CHECK (NOT ((coordinate_system_auth_name IS NULL OR coordinate_system_code IS NULL) AND text_definition IS NULL)),
    CONSTRAINT check_geodetic_crs_cs_bis CHECK (NOT ((NOT(coordinate_system_auth_name IS NULL OR coordinate_system_code IS NULL)) AND text_definition IS NOT NULL)),
    CONSTRAINT check_geodetic_crs_datum CHECK (NOT ((datum_auth_name IS NULL OR datum_code IS NULL) AND text_definition IS NULL)),
    CONSTRAINT check_geodetic_crs_datum_bis CHECK (NOT ((NOT(datum_auth_name IS NULL OR datum_code IS NULL)) AND text_definition IS NOT NULL)),
    CONSTRAINT check_geodetic_crs_area CHECK (NOT ((area_of_use_auth_name IS NULL OR area_of_use_code IS NULL) AND text_definition IS NULL))
);

CREATE TRIGGER geodetic_crs_insert_trigger
BEFORE INSERT ON geodetic_crs
FOR EACH ROW BEGIN

    SELECT RAISE(ABORT, 'insert on geodetic_crs violates constraint: (auth_name, code) must not already exist in crs_view')
        WHERE EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.auth_name AND crs_view.code = NEW.code);

    SELECT RAISE(ABORT, 'insert on geodetic_crs violates constraint: datum must not be deprecated when geodetic_crs is not deprecated')
        WHERE EXISTS(SELECT 1 FROM geodetic_datum datum WHERE datum.auth_name = NEW.datum_auth_name AND datum.code = NEW.datum_code AND datum.deprecated != 0) AND NEW.deprecated = 0 AND NEW.text_definition IS NOT NULL;

    SELECT RAISE(ABORT, 'insert on geodetic_crs violates constraint: area_of_use must not be deprecated when geodetic_crs is not deprecated')
        WHERE EXISTS(SELECT 1 FROM area WHERE area.auth_name = NEW.area_of_use_auth_name AND area.code = NEW.area_of_use_code AND area.deprecated != 0) AND NEW.deprecated = 0 AND NEW.text_definition IS NOT NULL;

    SELECT RAISE(ABORT, 'insert on geodetic_crs violates constraint: coordinate_system.dimension must be 3 for type = ''geocentric''')
        WHERE NEW.type = 'geocentric' AND (SELECT dimension FROM coordinate_system WHERE coordinate_system.auth_name = NEW.coordinate_system_auth_name AND coordinate_system.code = NEW.coordinate_system_code) != 3;

    SELECT RAISE(ABORT, 'insert on geodetic_crs violates constraint: coordinate_system.type must be ''Cartesian'' for type = ''geocentric''')
        WHERE NEW.type = 'geocentric' AND (SELECT type FROM coordinate_system WHERE coordinate_system.auth_name = NEW.coordinate_system_auth_name AND coordinate_system.code = NEW.coordinate_system_code) != 'Cartesian';

    SELECT RAISE(ABORT, 'insert on geodetic_crs violates constraint: coordinate_system.type must be ''ellipsoidal''  for type = ''geographic 2D'' or ''geographic 3D''')
        WHERE NEW.type IN ('geographic 2D', 'geographic 3D') AND (SELECT type FROM coordinate_system WHERE coordinate_system.auth_name = NEW.coordinate_system_auth_name AND coordinate_system.code = NEW.coordinate_system_code) != 'ellipsoidal';

    SELECT RAISE(ABORT, 'insert on geodetic_crs violates constraint: coordinate_system.dimension must be 2 for type = ''geographic 2D''')
        WHERE NEW.type = 'geographic 2D' AND NEW.deprecated != 1 AND (SELECT dimension FROM coordinate_system WHERE coordinate_system.auth_name = NEW.coordinate_system_auth_name AND coordinate_system.code = NEW.coordinate_system_code) != 2;

    SELECT RAISE(ABORT, 'insert on geodetic_crs violates constraint: coordinate_system.dimension must be 3 for type = ''geographic 3D''')
        WHERE NEW.type = 'geographic 3D' AND (SELECT dimension FROM coordinate_system WHERE coordinate_system.auth_name = NEW.coordinate_system_auth_name AND coordinate_system.code = NEW.coordinate_system_code) != 3;
END;

CREATE TABLE vertical_crs(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    description TEXT,
    scope TEXT,
    coordinate_system_auth_name TEXT NOT NULL,
    coordinate_system_code TEXT NOT NULL,
    datum_auth_name TEXT NOT NULL,
    datum_code TEXT NOT NULL,
    area_of_use_auth_name TEXT NOT NULL,
    area_of_use_code TEXT NOT NULL,
    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),
    CONSTRAINT pk_vertical_crs PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_vertical_crs_coordinate_system FOREIGN KEY (coordinate_system_auth_name, coordinate_system_code) REFERENCES coordinate_system(auth_name, code),
    CONSTRAINT fk_vertical_crs_datum FOREIGN KEY (datum_auth_name, datum_code) REFERENCES vertical_datum(auth_name, code),
    CONSTRAINT fk_vertical_crs_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code)
);

CREATE TRIGGER vertical_crs_insert_trigger
BEFORE INSERT ON vertical_crs
FOR EACH ROW BEGIN

    SELECT RAISE(ABORT, 'insert on vertical_crs violates constraint: (auth_name, code) must not already exist in crs_view')
        WHERE EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.auth_name AND crs_view.code = NEW.code);

    SELECT RAISE(ABORT, 'insert on vertical_crs violates constraint: datum must not be deprecated when vertical_crs is not deprecated')
        WHERE EXISTS(SELECT 1 FROM vertical_crs datum WHERE datum.auth_name = NEW.datum_auth_name AND datum.code = NEW.datum_code AND datum.deprecated != 0) AND NEW.deprecated = 0;

    SELECT RAISE(ABORT, 'insert on vertical_crs violates constraint: area_of_use must not be deprecated when vertical_crs is not deprecated')
        WHERE EXISTS(SELECT 1 FROM area WHERE area.auth_name = NEW.area_of_use_auth_name AND area.code = NEW.area_of_use_code AND area.deprecated != 0) AND NEW.deprecated = 0;

    SELECT RAISE(ABORT, 'insert on vertical_crs violates constraint: coordinate_system.type must be ''vertical''')
        WHERE (SELECT type FROM coordinate_system WHERE coordinate_system.auth_name = NEW.coordinate_system_auth_name AND coordinate_system.code = NEW.coordinate_system_code) != 'vertical';
    SELECT RAISE(ABORT, 'insert on vertical_crs violates constraint: coordinate_system.dimension must be 1')
        WHERE (SELECT dimension FROM coordinate_system WHERE coordinate_system.auth_name = NEW.coordinate_system_auth_name AND coordinate_system.code = NEW.coordinate_system_code) != 1;
END;

CREATE TABLE conversion_method(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),

    CONSTRAINT pk_conversion_method PRIMARY KEY (auth_name, code)
);

CREATE TABLE conversion_param(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),

    CONSTRAINT pk_conversion_param PRIMARY KEY (auth_name, code)
);

CREATE TABLE conversion_table(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),

    description TEXT,
    scope TEXT,

    area_of_use_auth_name TEXT NOT NULL,
    area_of_use_code TEXT NOT NULL,

    method_auth_name TEXT CHECK (method_auth_name IS NULL OR length(method_auth_name) >= 1),
    method_code TEXT CHECK (method_code IS NULL OR length(method_code) >= 1),
    -- method_name TEXT,

    param1_auth_name TEXT,
    param1_code TEXT,
    -- param1_name TEXT,
    param1_value FLOAT,
    param1_uom_auth_name TEXT,
    param1_uom_code TEXT,

    param2_auth_name TEXT,
    param2_code TEXT,
    --param2_name TEXT,
    param2_value FLOAT,
    param2_uom_auth_name TEXT,
    param2_uom_code TEXT,

    param3_auth_name TEXT,
    param3_code TEXT,
    --param3_name TEXT,
    param3_value FLOAT,
    param3_uom_auth_name TEXT,
    param3_uom_code TEXT,

    param4_auth_name TEXT,
    param4_code TEXT,
    --param4_name TEXT,
    param4_value FLOAT,
    param4_uom_auth_name TEXT,
    param4_uom_code TEXT,

    param5_auth_name TEXT,
    param5_code TEXT,
    --param5_name TEXT,
    param5_value FLOAT,
    param5_uom_auth_name TEXT,
    param5_uom_code TEXT,

    param6_auth_name TEXT,
    param6_code TEXT,
    --param6_name TEXT,
    param6_value FLOAT,
    param6_uom_auth_name TEXT,
    param6_uom_code TEXT,

    param7_auth_name TEXT,
    param7_code TEXT,
    --param7_name TEXT,
    param7_value FLOAT,
    param7_uom_auth_name TEXT,
    param7_uom_code TEXT,

    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),

    CONSTRAINT pk_conversion PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_conversion_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code),
    CONSTRAINT fk_conversion_method FOREIGN KEY (method_auth_name, method_code) REFERENCES conversion_method(auth_name, code),
    --CONSTRAINT fk_conversion_coordinate_operation FOREIGN KEY (auth_name, code) REFERENCES coordinate_operation(auth_name, code),
    CONSTRAINT fk_conversion_param1_uom FOREIGN KEY (param1_uom_auth_name, param1_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_conversion_param2_uom FOREIGN KEY (param2_uom_auth_name, param2_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_conversion_param3_uom FOREIGN KEY (param3_uom_auth_name, param3_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_conversion_param4_uom FOREIGN KEY (param4_uom_auth_name, param4_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_conversion_param5_uom FOREIGN KEY (param5_uom_auth_name, param5_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_conversion_param6_uom FOREIGN KEY (param6_uom_auth_name, param6_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_conversion_param7_uom FOREIGN KEY (param7_uom_auth_name, param7_uom_code) REFERENCES unit_of_measure(auth_name, code)
);

CREATE VIEW conversion AS SELECT
    c.auth_name,
    c.code,
    c.name,

    c.description,
    c.scope,

    c.area_of_use_auth_name,
    c.area_of_use_code,

    c.method_auth_name,
    c.method_code,
    m.name AS method_name,

    c.param1_auth_name,
    c.param1_code,
    param1.name AS param1_name,
    c.param1_value,
    c.param1_uom_auth_name,
    c.param1_uom_code,

    c.param2_auth_name,
    c.param2_code,
    param2.name AS param2_name,
    c.param2_value,
    c.param2_uom_auth_name,
    c.param2_uom_code,

    c.param3_auth_name,
    c.param3_code,
    param3.name AS param3_name,
    c.param3_value,
    c.param3_uom_auth_name,
    c.param3_uom_code,

    c.param4_auth_name,
    c.param4_code,
    param4.name AS param4_name,
    c.param4_value,
    c.param4_uom_auth_name,
    c.param4_uom_code,

    c.param5_auth_name,
    c.param5_code,
    param5.name AS param5_name,
    c.param5_value,
    c.param5_uom_auth_name,
    c.param5_uom_code,

    c.param6_auth_name,
    c.param6_code,
    param6.name AS param6_name,
    c.param6_value,
    c.param6_uom_auth_name,
    c.param6_uom_code,

    c.param7_auth_name,
    c.param7_code,
    param7.name AS param7_name,
    c.param7_value,
    c.param7_uom_auth_name,
    c.param7_uom_code,

    c.deprecated

    FROM conversion_table c
    LEFT JOIN conversion_method m ON c.method_auth_name = m.auth_name AND c.method_code = m.code
    LEFT JOIN conversion_param param1 ON c.param1_auth_name = param1.auth_name AND c.param1_code = param1.code
    LEFT JOIN conversion_param param2 ON c.param2_auth_name = param2.auth_name AND c.param2_code = param2.code
    LEFT JOIN conversion_param param3 ON c.param3_auth_name = param3.auth_name AND c.param3_code = param3.code
    LEFT JOIN conversion_param param4 ON c.param4_auth_name = param4.auth_name AND c.param4_code = param4.code
    LEFT JOIN conversion_param param5 ON c.param5_auth_name = param5.auth_name AND c.param5_code = param5.code
    LEFT JOIN conversion_param param6 ON c.param6_auth_name = param6.auth_name AND c.param6_code = param6.code
    LEFT JOIN conversion_param param7 ON c.param7_auth_name = param7.auth_name AND c.param7_code = param7.code
;

CREATE TRIGGER conversion_method_insert_trigger
BEFORE INSERT ON conversion_method
BEGIN

    SELECT RAISE(ABORT, 'insert on conversion violates constraint: method should be known')
        WHERE (NEW.auth_name || '_' || NEW.code || '_' || NEW.name) NOT IN (
            'EPSG_1024_Popular Visualisation Pseudo Mercator',
            'EPSG_1027_Lambert Azimuthal Equal Area (Spherical)',
            'EPSG_1028_Equidistant Cylindrical',
            'EPSG_1029_Equidistant Cylindrical (Spherical)',
            'EPSG_1041_Krovak (North Orientated)',
            'EPSG_1042_Krovak Modified',
            'EPSG_1043_Krovak Modified (North Orientated)',
            'EPSG_1051_Lambert Conic Conformal (2SP Michigan)',
            'EPSG_1052_Colombia Urban',
            'EPSG_1068_Height Depth Reversal',
            'EPSG_1069_Change of Vertical Unit',
            'EPSG_1078_Equal Earth',
            'EPSG_9602_Geographic/geocentric conversions',
            'EPSG_9659_Geographic3D to 2D conversion',
            'EPSG_9801_Lambert Conic Conformal (1SP)',
            'EPSG_9802_Lambert Conic Conformal (2SP)',
            'EPSG_9803_Lambert Conic Conformal (2SP Belgium)',
            'EPSG_9804_Mercator (variant A)',
            'EPSG_9805_Mercator (variant B)',
            'EPSG_9806_Cassini-Soldner',
            'EPSG_9807_Transverse Mercator',
            'EPSG_9808_Transverse Mercator (South Orientated)',
            'EPSG_9809_Oblique Stereographic',
            'EPSG_9810_Polar Stereographic (variant A)',
            'EPSG_9811_New Zealand Map Grid',
            'EPSG_9812_Hotine Oblique Mercator (variant A)',
            'EPSG_9813_Laborde Oblique Mercator',
            'EPSG_9815_Hotine Oblique Mercator (variant B)',
            'EPSG_9816_Tunisia Mining Grid',
            'EPSG_9817_Lambert Conic Near-Conformal',
            'EPSG_9818_American Polyconic',
            'EPSG_9819_Krovak',
            'EPSG_9820_Lambert Azimuthal Equal Area',
            'EPSG_9821_Lambert Azimuthal Equal Area (Spherical)',
            'EPSG_9822_Albers Equal Area',
            'EPSG_9823_Equidistant Cylindrical (Spherical)',
            'EPSG_9824_Transverse Mercator Zoned Grid System',
            'EPSG_9826_Lambert Conic Conformal (West Orientated)',
            'EPSG_9828_Bonne (South Orientated)',
            'EPSG_9829_Polar Stereographic (variant B)',
            'EPSG_9830_Polar Stereographic (variant C)',
            'EPSG_9831_Guam Projection',
            'EPSG_9832_Modified Azimuthal Equidistant',
            'EPSG_9833_Hyperbolic Cassini-Soldner',
            'EPSG_9834_Lambert Cylindrical Equal Area (Spherical)',
            'EPSG_9835_Lambert Cylindrical Equal Area',
            'EPSG_9836_Geocentric/topocentric conversions',
            'EPSG_9837_Geographic/topocentric conversions',
            'EPSG_9838_Vertical Perspective',
            'EPSG_9841_Mercator (1SP) (Spherical)',
            'EPSG_9842_Equidistant Cylindrical',
            'EPSG_9843_Axis Order Reversal (2D)',
            'EPSG_9844_Axis Order Reversal (Geographic3D horizontal)',
            'EPSG_9827_Bonne',
            'PROJ_gstm_Gauss Schreiber Transverse Mercator',
            'PROJ_mill_PROJ mill');
END;

CREATE TRIGGER conversion_table_insert_trigger
BEFORE INSERT ON conversion_table
BEGIN
    SELECT RAISE(ABORT, 'insert on conversion_table violates constraint: (auth_name, code) must not already exist in coordinate_operation_with_conversion_view')
        WHERE EXISTS (SELECT 1 FROM coordinate_operation_with_conversion_view covwv WHERE covwv.auth_name = NEW.auth_name AND covwv.code = NEW.code);
END;

CREATE TRIGGER conversion_insert_trigger_method
INSTEAD OF INSERT ON conversion
    WHEN NOT EXISTS (SELECT 1 FROM conversion_method m WHERE
        m.auth_name = NEW.method_auth_name AND m.code = NEW.method_code AND m.name = NEW.method_name)
BEGIN
    INSERT INTO conversion_method VALUES (NEW.method_auth_name, NEW.method_code, NEW.method_name);
END;

CREATE TRIGGER conversion_insert_trigger_param1
INSTEAD OF INSERT ON conversion
    WHEN NEW.param1_auth_name is NOT NULL AND NOT EXISTS
        (SELECT 1 FROM conversion_param p WHERE p.auth_name = NEW.param1_auth_name AND p.code = NEW.param1_code AND p.name = NEW.param1_name)
BEGIN
    INSERT INTO conversion_param VALUES (NEW.param1_auth_name, NEW.param1_code, NEW.param1_name);
END;

CREATE TRIGGER conversion_insert_trigger_param2
INSTEAD OF INSERT ON conversion
    WHEN NEW.param2_auth_name is NOT NULL AND NOT EXISTS
        (SELECT 1 FROM conversion_param p WHERE p.auth_name = NEW.param2_auth_name AND p.code = NEW.param2_code AND p.name = NEW.param2_name)
BEGIN
    INSERT INTO conversion_param VALUES (NEW.param2_auth_name, NEW.param2_code, NEW.param2_name);
END;

CREATE TRIGGER conversion_insert_trigger_param3
INSTEAD OF INSERT ON conversion
    WHEN NEW.param3_auth_name is NOT NULL AND NOT EXISTS
        (SELECT 1 FROM conversion_param p WHERE p.auth_name = NEW.param3_auth_name AND p.code = NEW.param3_code AND p.name = NEW.param3_name)
BEGIN
    INSERT INTO conversion_param VALUES (NEW.param3_auth_name, NEW.param3_code, NEW.param3_name);
END;

CREATE TRIGGER conversion_insert_trigger_param4
INSTEAD OF INSERT ON conversion
    WHEN NEW.param4_auth_name is NOT NULL AND NOT EXISTS
        (SELECT 1 FROM conversion_param p WHERE p.auth_name = NEW.param4_auth_name AND p.code = NEW.param4_code AND p.name = NEW.param4_name)
BEGIN
    INSERT INTO conversion_param VALUES (NEW.param4_auth_name, NEW.param4_code, NEW.param4_name);
END;

CREATE TRIGGER conversion_insert_trigger_param5
INSTEAD OF INSERT ON conversion
    WHEN NEW.param5_auth_name is NOT NULL AND NOT EXISTS
        (SELECT 1 FROM conversion_param p WHERE p.auth_name = NEW.param5_auth_name AND p.code = NEW.param5_code AND p.name = NEW.param5_name)
BEGIN
    INSERT INTO conversion_param VALUES (NEW.param5_auth_name, NEW.param5_code, NEW.param5_name);
END;

CREATE TRIGGER conversion_insert_trigger_param6
INSTEAD OF INSERT ON conversion
    WHEN NEW.param6_auth_name is NOT NULL AND NOT EXISTS
        (SELECT 1 FROM conversion_param p WHERE p.auth_name = NEW.param6_auth_name AND p.code = NEW.param6_code AND p.name = NEW.param6_name)
BEGIN
    INSERT INTO conversion_param VALUES (NEW.param6_auth_name, NEW.param6_code, NEW.param6_name);
END;

CREATE TRIGGER conversion_insert_trigger_param7
INSTEAD OF INSERT ON conversion
    WHEN NEW.param7_auth_name is NOT NULL AND NOT EXISTS
        (SELECT 1 FROM conversion_param p WHERE p.auth_name = NEW.param7_auth_name AND p.code = NEW.param7_code AND p.name = NEW.param7_name)
BEGIN
    INSERT INTO conversion_param VALUES (NEW.param7_auth_name, NEW.param7_code, NEW.param7_name);
END;

CREATE TRIGGER conversion_insert_trigger_insert_into_conversion_table
INSTEAD OF INSERT ON conversion
BEGIN
INSERT INTO conversion_table VALUES
(
    NEW.auth_name,
    NEW.code,
    NEW.name,

    NEW.description,
    NEW.scope,

    NEW.area_of_use_auth_name,
    NEW.area_of_use_code,

    NEW.method_auth_name,
    NEW.method_code,
    --NEW.method_name,

    NEW.param1_auth_name,
    NEW.param1_code,
    --NEW.param1_name,
    NEW.param1_value,
    NEW.param1_uom_auth_name,
    NEW.param1_uom_code,

    NEW.param2_auth_name,
    NEW.param2_code,
    --NEW.param2_name,
    NEW.param2_value,
    NEW.param2_uom_auth_name,
    NEW.param2_uom_code,

    NEW.param3_auth_name,
    NEW.param3_code,
    --NEW.param3_name,
    NEW.param3_value,
    NEW.param3_uom_auth_name,
    NEW.param3_uom_code,

    NEW.param4_auth_name,
    NEW.param4_code,
    --NEW.param4_name,
    NEW.param4_value,
    NEW.param4_uom_auth_name,
    NEW.param4_uom_code,

    NEW.param5_auth_name,
    NEW.param5_code,
    --NEW.param5_name,
    NEW.param5_value,
    NEW.param5_uom_auth_name,
    NEW.param5_uom_code,

    NEW.param6_auth_name,
    NEW.param6_code,
    --NEW.param6_name,
    NEW.param6_value,
    NEW.param6_uom_auth_name,
    NEW.param6_uom_code,

    NEW.param7_auth_name,
    NEW.param7_code,
    --NEW.param7_name,
    NEW.param7_value,
    NEW.param7_uom_auth_name,
    NEW.param7_uom_code,

    NEW.deprecated
);
END;

CREATE TABLE projected_crs(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    description TEXT,
    scope TEXT,
    coordinate_system_auth_name TEXT,
    coordinate_system_code TEXT,
    geodetic_crs_auth_name TEXT,
    geodetic_crs_code TEXT,
    conversion_auth_name TEXT,
    conversion_code TEXT,
    area_of_use_auth_name TEXT,
    area_of_use_code TEXT,
    text_definition TEXT, -- PROJ string or WKT string. Use of this is discouraged as prone to definition ambiguities
    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),
    CONSTRAINT pk_projected_crs PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_projected_crs_coordinate_system FOREIGN KEY (coordinate_system_auth_name, coordinate_system_code) REFERENCES coordinate_system(auth_name, code),
    CONSTRAINT fk_projected_crs_geodetic_crs FOREIGN KEY (geodetic_crs_auth_name, geodetic_crs_code) REFERENCES geodetic_crs(auth_name, code),
    CONSTRAINT fk_projected_crs_conversion FOREIGN KEY (conversion_auth_name, conversion_code) REFERENCES conversion_table(auth_name, code),
    CONSTRAINT fk_projected_crs_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code),
    CONSTRAINT check_projected_crs_cs CHECK (NOT((coordinate_system_auth_name IS NULL OR coordinate_system_code IS NULL) AND text_definition IS NULL)),
    CONSTRAINT check_projected_crs_cs_bis CHECK (NOT((NOT(coordinate_system_auth_name IS NULL OR coordinate_system_code IS NULL)) AND text_definition IS NOT NULL)),
    CONSTRAINT check_projected_crs_geodetic_crs CHECK (NOT((geodetic_crs_auth_name IS NULL OR geodetic_crs_code IS NULL) AND text_definition IS NULL)),
    CONSTRAINT check_projected_crs_conversion CHECK (NOT((NOT(conversion_auth_name IS NULL OR conversion_code IS NULL)) AND text_definition IS NOT NULL)),
    CONSTRAINT check_projected_crs_area CHECK (NOT((area_of_use_auth_name IS NULL OR area_of_use_code IS NULL) AND text_definition IS NULL))
);

CREATE TRIGGER projected_crs_insert_trigger
BEFORE INSERT ON projected_crs
FOR EACH ROW BEGIN

    SELECT RAISE(ABORT, 'insert on projected_crs violates constraint: (auth_name, code) must not already exist in crs_view')
        WHERE EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.auth_name AND crs_view.code = NEW.code);

    SELECT RAISE(ABORT, 'insert on projected_crs violates constraint: geodetic_crs must not be deprecated when projected_crs is not deprecated')
        WHERE EXISTS(SELECT 1 FROM geodetic_crs WHERE geodetic_crs.auth_name = NEW.geodetic_crs_auth_name AND geodetic_crs.code = NEW.geodetic_crs_code AND geodetic_crs.deprecated != 0) AND NEW.deprecated = 0 AND NOT (NEW.auth_name = 'ESRI' AND NEW.geodetic_crs_auth_name != 'ESRI');

    SELECT RAISE(ABORT, 'insert on projected_crs violates constraint: conversion must exist when text_definition is NULL')
        WHERE NOT EXISTS(SELECT 1 FROM conversion WHERE conversion.auth_name = NEW.conversion_auth_name AND conversion.code = NEW.conversion_code) AND NEW.text_definition IS NULL;

    SELECT RAISE(ABORT, 'insert on projected_crs violates constraint: conversion must not be deprecated when projected_crs is not deprecated')
        WHERE EXISTS(SELECT 1 FROM conversion WHERE conversion.auth_name = NEW.conversion_auth_name AND conversion.code = NEW.conversion_code AND conversion.deprecated != 0) AND NEW.deprecated = 0;

    --SELECT RAISE(ABORT, 'insert on projected_crs violates constraint: geodetic_crs must NOT be defined when text_definition is NOT NULL')
    --    WHERE (NOT(NEW.geodetic_crs_auth_name IS NULL OR NEW.geodetic_crs_code IS NULL)) AND NEW.text_definition IS NOT NULL;

    SELECT RAISE(ABORT, 'insert on projected_crs violates constraint: area_of_use must not be deprecated when projected_crs is not deprecated')
        WHERE EXISTS(SELECT 1 FROM area WHERE area.auth_name = NEW.area_of_use_auth_name AND area.code = NEW.area_of_use_code AND area.deprecated != 0) AND NEW.deprecated = 0 AND NEW.text_definition IS NOT NULL;

    SELECT RAISE(ABORT, 'insert on projected_crs violates constraint: coordinate_system.type must be ''cartesian''')
        WHERE (SELECT type FROM coordinate_system WHERE coordinate_system.auth_name = NEW.coordinate_system_auth_name AND coordinate_system.code = NEW.coordinate_system_code) != 'Cartesian';

    SELECT RAISE(ABORT, 'insert on projected_crs violates constraint: coordinate_system.dimension must be 2')
    -- EPSG:4461 is topocentric
        WHERE NOT(NEW.coordinate_system_auth_name = 'EPSG' AND NEW.coordinate_system_code = '4461') AND (SELECT dimension FROM coordinate_system WHERE coordinate_system.auth_name = NEW.coordinate_system_auth_name AND coordinate_system.code = NEW.coordinate_system_code) != 2;
END;

CREATE TABLE compound_crs(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),
    description TEXT,
    scope TEXT,
    horiz_crs_auth_name TEXT NOT NULL,
    horiz_crs_code TEXT NOT NULL,
    vertical_crs_auth_name TEXT NOT NULL,
    vertical_crs_code TEXT NOT NULL,
    area_of_use_auth_name TEXT NOT NULL,
    area_of_use_code TEXT NOT NULL,
    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),
    CONSTRAINT pk_compound_crs PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_compound_crs_vertical_crs FOREIGN KEY (vertical_crs_auth_name, vertical_crs_code) REFERENCES vertical_crs(auth_name, code),
    CONSTRAINT fk_compoundcrs_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code)
);

CREATE TRIGGER compound_crs_insert_trigger
BEFORE INSERT ON compound_crs
FOR EACH ROW BEGIN

    SELECT RAISE(ABORT, 'insert on compound_crs violates constraint: (auth_name, code) must not already exist in crs_view')
        WHERE EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.auth_name AND crs_view.code = NEW.code);

    SELECT RAISE(ABORT, 'insert on compound_crs violates constraint: horiz_crs(auth_name, code) not found')
        WHERE NOT EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.horiz_crs_auth_name AND crs_view.code = NEW.horiz_crs_code);

    SELECT RAISE(ABORT, 'insert on compound_crs violates constraint: horiz_crs must be equal to ''geographic 2D'' or ''projected''')
        WHERE (SELECT type FROM crs_view WHERE crs_view.auth_name = NEW.horiz_crs_auth_name AND crs_view.code = NEW.horiz_crs_code) NOT IN ('geographic 2D', 'projected');

    SELECT RAISE(ABORT, 'insert on compound_crs violates constraint: vertical_crs must be equal to ''vertical''')
        WHERE (SELECT type FROM crs_view WHERE crs_view.auth_name = NEW.vertical_crs_auth_name AND crs_view.code = NEW.vertical_crs_code) NOT IN ('vertical');

    SELECT RAISE(ABORT, 'insert on compound_crs violates constraint: horiz_crs must not be deprecated when compound_crs is not deprecated')
        WHERE EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.horiz_crs_auth_name AND crs_view.code = NEW.horiz_crs_code AND crs_view.deprecated != 0) AND NEW.deprecated = 0;

    SELECT RAISE(ABORT, 'insert on compound_crs violates constraint: vertical_crs must not be deprecated when compound_crs is not deprecated')
        WHERE EXISTS (SELECT 1 FROM vertical_crs WHERE vertical_crs.auth_name = NEW.vertical_crs_auth_name AND vertical_crs.code = NEW.vertical_crs_code AND vertical_crs.deprecated != 0) AND NEW.deprecated = 0;

    SELECT RAISE(ABORT, 'insert on compound_crs violates constraint: area_of_use must not be deprecated when compound_crs is not deprecated')
        WHERE EXISTS(SELECT 1 FROM area WHERE area.auth_name = NEW.area_of_use_auth_name AND area.code = NEW.area_of_use_code AND area.deprecated != 0) AND NEW.deprecated = 0;
END;

CREATE TABLE coordinate_operation_method(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),

    CONSTRAINT pk_coordinate_operation_method PRIMARY KEY (auth_name, code)
);

CREATE TABLE helmert_transformation_table(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),

    description TEXT,
    scope TEXT,

    method_auth_name TEXT NOT NULL CHECK (length(method_auth_name) >= 1),
    method_code TEXT NOT NULL CHECK (length(method_code) >= 1),
    --method_name NOT NULL CHECK (length(method_name) >= 2),

    source_crs_auth_name TEXT NOT NULL,
    source_crs_code TEXT NOT NULL,
    target_crs_auth_name TEXT NOT NULL,
    target_crs_code TEXT NOT NULL,

    area_of_use_auth_name TEXT NOT NULL,
    area_of_use_code TEXT NOT NULL,

    accuracy FLOAT CHECK (accuracy >= 0),

    tx FLOAT NOT NULL,
    ty FLOAT NOT NULL,
    tz FLOAT NOT NULL,
    translation_uom_auth_name TEXT NOT NULL,
    translation_uom_code TEXT NOT NULL,
    rx FLOAT,
    ry FLOAT,
    rz FLOAT,
    rotation_uom_auth_name TEXT,
    rotation_uom_code TEXT,
    scale_difference FLOAT,
    scale_difference_uom_auth_name TEXT,
    scale_difference_uom_code TEXT,
    rate_tx FLOAT,
    rate_ty FLOAT,
    rate_tz FLOAT,
    rate_translation_uom_auth_name TEXT,
    rate_translation_uom_code TEXT,
    rate_rx FLOAT,
    rate_ry FLOAT,
    rate_rz FLOAT,
    rate_rotation_uom_auth_name TEXT,
    rate_rotation_uom_code TEXT,
    rate_scale_difference FLOAT,
    rate_scale_difference_uom_auth_name TEXT,
    rate_scale_difference_uom_code TEXT,
    epoch FLOAT,
    epoch_uom_auth_name TEXT,
    epoch_uom_code TEXT,
    px FLOAT, -- Pivot / evaluation point for Molodensky-Badekas
    py FLOAT,
    pz FLOAT,
    pivot_uom_auth_name TEXT,
    pivot_uom_code TEXT,

    operation_version TEXT, -- normally mandatory in OGC Topic 2 but optional here

    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),

    CONSTRAINT pk_helmert_transformation PRIMARY KEY (auth_name, code),
    CONSTRAINT fk_helmert_transformation_source_crs FOREIGN KEY (source_crs_auth_name, source_crs_code) REFERENCES geodetic_crs(auth_name, code),
    CONSTRAINT fk_helmert_transformation_target_crs FOREIGN KEY (target_crs_auth_name, target_crs_code) REFERENCES geodetic_crs(auth_name, code),
    CONSTRAINT fk_helmert_transformation_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code),
    CONSTRAINT fk_helmert_transformation_method FOREIGN KEY (method_auth_name, method_code) REFERENCES coordinate_operation_method(auth_name, code),
    --CONSTRAINT fk_helmert_transformation_coordinate_operation FOREIGN KEY (auth_name, code) REFERENCES coordinate_operation(auth_name, code),
    CONSTRAINT fk_helmert_translation_uom FOREIGN KEY (translation_uom_auth_name, translation_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_helmert_rotation_uom FOREIGN KEY (rotation_uom_auth_name, rotation_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_helmert_scale_difference_uom FOREIGN KEY (scale_difference_uom_auth_name, scale_difference_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_helmert_rate_translation_uom FOREIGN KEY (rate_translation_uom_auth_name, rate_translation_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_helmert_rate_rotation_uom FOREIGN KEY (rate_rotation_uom_auth_name, rate_rotation_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_helmert_rate_scale_difference_uom FOREIGN KEY (rate_scale_difference_uom_auth_name, rate_scale_difference_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_helmert_epoch_uom FOREIGN KEY (epoch_uom_auth_name, epoch_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_helmert_pivot_uom FOREIGN KEY (pivot_uom_auth_name, pivot_uom_code) REFERENCES unit_of_measure(auth_name, code)
);

CREATE VIEW helmert_transformation AS SELECT
    h.auth_name,
    h.code,
    h.name,

    h.description,
    h.scope,

    h.method_auth_name,
    h.method_code,
    m.name AS method_name,

    h.source_crs_auth_name,
    h.source_crs_code,
    h.target_crs_auth_name,
    h.target_crs_code,

    h.area_of_use_auth_name,
    h.area_of_use_code,

    h.accuracy,

    h.tx,
    h.ty,
    h.tz,
    h.translation_uom_auth_name,
    h.translation_uom_code,
    h.rx,
    h.ry,
    h.rz,
    h.rotation_uom_auth_name,
    h.rotation_uom_code,
    h.scale_difference,
    h.scale_difference_uom_auth_name,
    h.scale_difference_uom_code,
    h.rate_tx,
    h.rate_ty,
    h.rate_tz,
    h.rate_translation_uom_auth_name,
    h.rate_translation_uom_code,
    h.rate_rx,
    h.rate_ry,
    h.rate_rz,
    h.rate_rotation_uom_auth_name,
    h.rate_rotation_uom_code,
    h.rate_scale_difference,
    h.rate_scale_difference_uom_auth_name,
    h.rate_scale_difference_uom_code,
    h.epoch,
    h.epoch_uom_auth_name,
    h.epoch_uom_code,
    h.px,
    h.py,
    h.pz,
    h.pivot_uom_auth_name,
    h.pivot_uom_code,

    h.operation_version,

    h.deprecated

    FROM helmert_transformation_table h
    LEFT JOIN coordinate_operation_method m ON h.method_auth_name = m.auth_name AND h.method_code = m.code
;

CREATE TRIGGER helmert_transformation_insert_trigger_method
INSTEAD OF INSERT ON helmert_transformation
    WHEN NOT EXISTS (SELECT 1 FROM coordinate_operation_method m WHERE
        m.auth_name = NEW.method_auth_name AND m.code = NEW.method_code AND m.name = NEW.method_name)
BEGIN
    INSERT INTO coordinate_operation_method VALUES (NEW.method_auth_name, NEW.method_code, NEW.method_name);
END;

CREATE TRIGGER helmert_transformation_insert_trigger_into_helmert_transformation_table
INSTEAD OF INSERT ON helmert_transformation
BEGIN
INSERT INTO helmert_transformation_table VALUES
(
    NEW.auth_name,
    NEW.code,
    NEW.name,

    NEW.description,
    NEW.scope,

    NEW.method_auth_name,
    NEW.method_code,
    -- method_name

    NEW.source_crs_auth_name,
    NEW.source_crs_code,
    NEW.target_crs_auth_name,
    NEW.target_crs_code,

    NEW.area_of_use_auth_name,
    NEW.area_of_use_code,

    NEW.accuracy,

    NEW.tx,
    NEW.ty,
    NEW.tz,
    NEW.translation_uom_auth_name,
    NEW.translation_uom_code,
    NEW.rx,
    NEW.ry,
    NEW.rz,
    NEW.rotation_uom_auth_name,
    NEW.rotation_uom_code,
    NEW.scale_difference,
    NEW.scale_difference_uom_auth_name,
    NEW.scale_difference_uom_code,
    NEW.rate_tx,
    NEW.rate_ty,
    NEW.rate_tz,
    NEW.rate_translation_uom_auth_name,
    NEW.rate_translation_uom_code,
    NEW.rate_rx,
    NEW.rate_ry,
    NEW.rate_rz,
    NEW.rate_rotation_uom_auth_name,
    NEW.rate_rotation_uom_code,
    NEW.rate_scale_difference,
    NEW.rate_scale_difference_uom_auth_name,
    NEW.rate_scale_difference_uom_code,
    NEW.epoch,
    NEW.epoch_uom_auth_name,
    NEW.epoch_uom_code,
    NEW.px,
    NEW.py,
    NEW.pz,
    NEW.pivot_uom_auth_name,
    NEW.pivot_uom_code,

    NEW.operation_version,

    NEW.deprecated
);
END;

CREATE TRIGGER helmert_transformation_insert_trigger
BEFORE INSERT ON helmert_transformation_table
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: (auth_name, code) must not already exist in coordinate_operation_with_conversion_view')
        WHERE EXISTS (SELECT 1 FROM coordinate_operation_with_conversion_view covwv WHERE covwv.auth_name = NEW.auth_name AND covwv.code = NEW.code);

    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: translation_uom.type must be ''length''')
        WHERE (SELECT type FROM unit_of_measure WHERE unit_of_measure.auth_name = NEW.translation_uom_auth_name AND unit_of_measure.code = NEW.translation_uom_code) != 'length';
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: rotation_uom.type must be ''angle''')
        WHERE (SELECT type FROM unit_of_measure WHERE unit_of_measure.auth_name = NEW.rotation_uom_auth_name AND unit_of_measure.code = NEW.rotation_uom_code) != 'angle';
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: scale_difference_uom.type must be ''scale''')
        WHERE (SELECT type FROM unit_of_measure WHERE unit_of_measure.auth_name = NEW.scale_difference_uom_auth_name AND unit_of_measure.code = NEW.scale_difference_uom_code) != 'scale';
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: rate_translation_uom.type must be ''length''')
        WHERE (SELECT type FROM unit_of_measure WHERE unit_of_measure.auth_name = NEW.rate_translation_uom_auth_name AND unit_of_measure.code = NEW.rate_translation_uom_code) != 'length';
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: rate_rotation_uom.type must be ''angle''')
        WHERE (SELECT type FROM unit_of_measure WHERE unit_of_measure.auth_name = NEW.rate_rotation_uom_auth_name AND unit_of_measure.code = NEW.rate_rotation_uom_code) != 'angle';
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: rate_scale_difference_uom.type must be ''scale''')
        WHERE (SELECT type FROM unit_of_measure WHERE unit_of_measure.auth_name = NEW.rate_scale_difference_uom_auth_name AND unit_of_measure.code = NEW.rate_scale_difference_uom_code) != 'scale';
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: epoch_uom.type must be ''time''')
        WHERE (SELECT type FROM unit_of_measure WHERE unit_of_measure.auth_name = NEW.epoch_uom_auth_name AND unit_of_measure.code = NEW.epoch_uom_code) != 'time';
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: pivot_uom.type must be ''length''')
        WHERE (SELECT type FROM unit_of_measure WHERE unit_of_measure.auth_name = NEW.pivot_uom_auth_name AND unit_of_measure.code = NEW.pivot_uom_code) != 'length';
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: source_crs must not be deprecated when helmert_transformation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM geodetic_crs crs WHERE crs.auth_name = NEW.source_crs_auth_name AND crs.code = NEW.source_crs_code AND crs.deprecated != 0) AND NEW.deprecated = 0 AND NOT (NEW.auth_name = 'ESRI');
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: target_crs must not be deprecated when helmert_transformation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM geodetic_crs crs WHERE crs.auth_name = NEW.target_crs_auth_name AND crs.code = NEW.target_crs_code AND crs.deprecated != 0) AND NEW.deprecated = 0 AND NOT (NEW.auth_name = 'ESRI');
    SELECT RAISE(ABORT, 'insert on helmert_transformation violates constraint: area_of_use must not be deprecated when helmert_transformation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM area WHERE area.auth_name = NEW.area_of_use_auth_name AND area.code = NEW.area_of_use_code AND area.deprecated != 0) AND NEW.deprecated = 0;
END;

CREATE TABLE grid_transformation(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),

    description TEXT,
    scope TEXT,

    method_auth_name TEXT NOT NULL CHECK (length(method_auth_name) >= 1),
    method_code TEXT NOT NULL CHECK (length(method_code) >= 1),
    method_name NOT NULL CHECK (length(method_name) >= 2),

    source_crs_auth_name TEXT NOT NULL,
    source_crs_code TEXT NOT NULL,
    target_crs_auth_name TEXT NOT NULL,
    target_crs_code TEXT NOT NULL,

    area_of_use_auth_name TEXT NOT NULL,
    area_of_use_code TEXT NOT NULL,

    accuracy FLOAT CHECK (accuracy >= 0),

    grid_param_auth_name TEXT NOT NULL,
    grid_param_code TEXT NOT NULL,
    grid_param_name TEXT NOT NULL,
    grid_name TEXT NOT NULL,

    grid2_param_auth_name TEXT,
    grid2_param_code TEXT,
    grid2_param_name TEXT,
    grid2_name TEXT,

    interpolation_crs_auth_name TEXT,
    interpolation_crs_code TEXT,

    operation_version TEXT, -- normally mandatory in OGC Topic 2 but optional here

    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),

    CONSTRAINT pk_grid_transformation PRIMARY KEY (auth_name, code),
    --CONSTRAINT fk_grid_transformation_coordinate_operation FOREIGN KEY (auth_name, code) REFERENCES coordinate_operation(auth_name, code),
    --CONSTRAINT fk_grid_transformation_source_crs FOREIGN KEY (source_crs_auth_name, source_crs_code) REFERENCES crs(auth_name, code),
    --CONSTRAINT fk_grid_transformation_target_crs FOREIGN KEY (target_crs_auth_name, target_crs_code) REFERENCES crs(auth_name, code),
    CONSTRAINT fk_grid_transformation_interpolation_crs FOREIGN KEY (interpolation_crs_auth_name, interpolation_crs_code) REFERENCES geodetic_crs(auth_name, code),
    CONSTRAINT fk_grid_transformation_transformation_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code)
);

CREATE TRIGGER grid_transformation_insert_trigger
BEFORE INSERT ON grid_transformation
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on grid_transformation violates constraint: (auth_name, code) must not already exist in coordinate_operation_with_conversion_view')
        WHERE EXISTS (SELECT 1 FROM coordinate_operation_with_conversion_view covwv WHERE covwv.auth_name = NEW.auth_name AND covwv.code = NEW.code);

    SELECT RAISE(ABORT, 'insert on grid_transformation violates constraint: source_crs(auth_name, code) not found')
        WHERE NOT EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.source_crs_auth_name AND crs_view.code = NEW.source_crs_code);

    SELECT RAISE(ABORT, 'insert on grid_transformation violates constraint: target_crs(auth_name, code) not found')
        WHERE NOT EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.target_crs_auth_name AND crs_view.code = NEW.target_crs_code);

    SELECT RAISE(ABORT, 'insert on grid_transformation violates constraint: source_crs must not be deprecated when grid_transformation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM crs_view crs WHERE crs.auth_name = NEW.source_crs_auth_name AND crs.code = NEW.source_crs_code AND crs.deprecated != 0) AND NEW.deprecated = 0 AND NOT (NEW.auth_name = 'ESRI');
    SELECT RAISE(ABORT, 'insert on grid_transformation violates constraint: target_crs must not be deprecated when grid_transformation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM crs_view crs WHERE crs.auth_name = NEW.target_crs_auth_name AND crs.code = NEW.target_crs_code AND crs.deprecated != 0) AND NEW.deprecated = 0 AND NOT (NEW.auth_name = 'ESRI');
    SELECT RAISE(ABORT, 'insert on grid_transformation violates constraint: area_of_use must not be deprecated when grid_transformation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM area WHERE area.auth_name = NEW.area_of_use_auth_name AND area.code = NEW.area_of_use_code AND area.deprecated != 0) AND NEW.deprecated = 0;
END;

-- Table that describe packages/archives that contain several grids
CREATE TABLE grid_packages(
    package_name TEXT NOT NULL NULL PRIMARY KEY,    -- package name that contains the file
    description TEXT,
    url TEXT,                                       -- optional URL where to download the PROJ grid
    direct_download BOOLEAN CHECK (direct_download IN (0, 1)), -- whether the URL can be used directly (if 0, authentication etc mightbe needed)
    open_license BOOLEAN CHECK (open_license IN (0, 1))
);

CREATE TRIGGER grid_packages_insert_trigger
BEFORE INSERT ON grid_packages
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on grid_packages violates constraint: open_license must be set when url is not NULL')
        WHERE NEW.open_license IS NULL AND NEW.url IS NOT NULL;
    SELECT RAISE(ABORT, 'insert on grid_packages violates constraint: direct_download must be set when url is not NULL')
        WHERE NEW.direct_download IS NULL AND NEW.url IS NOT NULL;
END;

-- Table that contain alternative names for original grid names coming from the authority
CREATE TABLE grid_alternatives(
    original_grid_name TEXT NOT NULL PRIMARY KEY,   -- original grid name (e.g. Und_min2.5x2.5_egm2008_isw=82_WGS84_TideFree.gz). For LOS/LAS format, the .las files
    proj_grid_name TEXT NOT NULL,                   -- PROJ grid name (e.g egm08_25.gtx)
    proj_grid_format TEXT NOT NULL,                 -- one of 'CTable2', 'NTv1', 'NTv2', 'GTX'
    proj_method TEXT NOT NULL,                      -- hgridshift, vgridshift or geoid_like
    inverse_direction BOOLEAN NOT NULL CHECK (inverse_direction IN (0, 1)), -- whether the PROJ grid direction is reversed w.r.t to the authority one (TRUE in that case)
    package_name TEXT,                              -- package name that contains the file
    url TEXT,                                       -- optional URL where to download the PROJ grid
    direct_download BOOLEAN CHECK (direct_download IN (0, 1)), -- whether the URL can be used directly (if 0, authentication etc might be needed)
    open_license BOOLEAN CHECK (open_license IN (0, 1)),
    directory TEXT,                                 -- optional directory where the file might be located

    CONSTRAINT fk_grid_alternatives_grid_packages FOREIGN KEY (package_name) REFERENCES grid_packages(package_name),
    CONSTRAINT check_grid_alternatives_grid_fromat CHECK (proj_grid_format IN ('CTable2', 'NTv1', 'NTv2', 'GTX')),
    CONSTRAINT check_grid_alternatives_proj_method CHECK (proj_method IN ('hgridshift', 'vgridshift', 'geoid_like')),
    CONSTRAINT check_grid_alternatives_not_hgridshift CHECK (NOT(proj_method != 'hgridshift' AND proj_grid_format IN ('CTable2', 'NTv1', 'NTv2'))),
    CONSTRAINT check_grid_alternatives_not_vgridshift CHECK (NOT(proj_method = 'hgridshift' AND proj_grid_format IN ('GTX'))),
    CONSTRAINT check_grid_alternatives_inverse_direction CHECK (NOT(proj_method = 'geoid_like' AND inverse_direction = 1)),
    CONSTRAINT check_grid_alternatives_package_name_url CHECK (NOT(package_name IS NOT NULL AND url IS NOT NULL)),
    CONSTRAINT check_grid_alternatives_direct_download_url CHECK (NOT(direct_download IS NULL AND url IS NOT NULL)),
    CONSTRAINT check_grid_alternatives_open_license_url CHECK (NOT(open_license IS NULL AND url IS NOT NULL))
);

CREATE TRIGGER grid_alternatives_insert_trigger
BEFORE INSERT ON grid_alternatives
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on grid_alternatives violates constraint: original_grid_name must be referenced in grid_transformation.grid_name')
        WHERE NEW.original_grid_name NOT IN ('null') AND NEW.original_grid_name NOT IN (SELECT grid_name FROM grid_transformation);
END;

CREATE TABLE other_transformation(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),

    description TEXT,
    scope TEXT,

    -- if method_auth_name = 'PROJ', method_code can be 'PROJString' for a
    -- PROJ string and then method_name is a PROJ string (typically a pipeline)
    -- if method_auth_name = 'PROJ', method_code can be 'WKT' for a
    -- PROJ string and then method_name is a WKT string (CoordinateOperation)
    method_auth_name TEXT NOT NULL CHECK (length(method_auth_name) >= 1),
    method_code TEXT NOT NULL CHECK (length(method_code) >= 1),
    method_name NOT NULL CHECK (length(method_name) >= 2),

    source_crs_auth_name TEXT NOT NULL,
    source_crs_code TEXT NOT NULL,
    target_crs_auth_name TEXT NOT NULL,
    target_crs_code TEXT NOT NULL,

    area_of_use_auth_name TEXT NOT NULL,
    area_of_use_code TEXT NOT NULL,

    accuracy FLOAT CHECK (accuracy >= 0),

    param1_auth_name TEXT,
    param1_code TEXT,
    param1_name TEXT,
    param1_value FLOAT,
    param1_uom_auth_name TEXT,
    param1_uom_code TEXT,

    param2_auth_name TEXT,
    param2_code TEXT,
    param2_name TEXT,
    param2_value FLOAT,
    param2_uom_auth_name TEXT,
    param2_uom_code TEXT,

    param3_auth_name TEXT,
    param3_code TEXT,
    param3_name TEXT,
    param3_value FLOAT,
    param3_uom_auth_name TEXT,
    param3_uom_code TEXT,

    param4_auth_name TEXT,
    param4_code TEXT,
    param4_name TEXT,
    param4_value FLOAT,
    param4_uom_auth_name TEXT,
    param4_uom_code TEXT,

    param5_auth_name TEXT,
    param5_code TEXT,
    param5_name TEXT,
    param5_value FLOAT,
    param5_uom_auth_name TEXT,
    param5_uom_code TEXT,

    param6_auth_name TEXT,
    param6_code TEXT,
    param6_name TEXT,
    param6_value FLOAT,
    param6_uom_auth_name TEXT,
    param6_uom_code TEXT,

    param7_auth_name TEXT,
    param7_code TEXT,
    param7_name TEXT,
    param7_value FLOAT,
    param7_uom_auth_name TEXT,
    param7_uom_code TEXT,

    operation_version TEXT, -- normally mandatory in OGC Topic 2 but optional here

    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),

    CONSTRAINT pk_other_transformation PRIMARY KEY (auth_name, code),
    --CONSTRAINT fk_other_transformation_coordinate_operation FOREIGN KEY (auth_name, code) REFERENCES coordinate_operation(auth_name, code),
    --CONSTRAINT fk_other_transformation_source_crs FOREIGN1 KEY (source_crs_auth_name, source_crs_code) REFERENCES crs(auth_name, code),
    --CONSTRAINT fk_other_transformation_target_crs FOREIGN KEY (target_crs_auth_name, target_crs_code) REFERENCES crs(auth_name, code),
    CONSTRAINT fk_other_transformation_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code)
    CONSTRAINT fk_other_transformation_param1_uom FOREIGN KEY (param1_uom_auth_name, param1_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_other_transformation_param2_uom FOREIGN KEY (param2_uom_auth_name, param2_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_other_transformation_param3_uom FOREIGN KEY (param3_uom_auth_name, param3_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_other_transformation_param4_uom FOREIGN KEY (param4_uom_auth_name, param4_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_other_transformation_param5_uom FOREIGN KEY (param5_uom_auth_name, param5_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_other_transformation_param6_uom FOREIGN KEY (param6_uom_auth_name, param6_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT fk_other_transformation_param7_uom FOREIGN KEY (param7_uom_auth_name, param7_uom_code) REFERENCES unit_of_measure(auth_name, code),
    CONSTRAINT check_other_transformation_method CHECK (NOT (method_auth_name = 'PROJ' AND method_code NOT IN ('PROJString', 'WKT')))
);

CREATE TRIGGER other_transformation_insert_trigger
BEFORE INSERT ON other_transformation
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on other_transformation violates constraint: (auth_name, code) must not already exist in coordinate_operation_with_conversion_view')
        WHERE EXISTS (SELECT 1 FROM coordinate_operation_with_conversion_view covwv WHERE covwv.auth_name = NEW.auth_name AND covwv.code = NEW.code);

    SELECT RAISE(ABORT, 'insert on other_transformation violates constraint: source_crs(auth_name, code) not found')
        WHERE NOT EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.source_crs_auth_name AND crs_view.code = NEW.source_crs_code);

    SELECT RAISE(ABORT, 'insert on other_transformation violates constraint: target_crs(auth_name, code) not found')
        WHERE NOT EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.target_crs_auth_name AND crs_view.code = NEW.target_crs_code);

    SELECT RAISE(ABORT, 'insert on other_transformation violates constraint: source_crs must not be deprecated when other_transformation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM crs_view crs WHERE crs.auth_name = NEW.source_crs_auth_name AND crs.code = NEW.source_crs_code AND crs.deprecated != 0) AND NEW.deprecated = 0 AND NOT (NEW.auth_name = 'ESRI');
    SELECT RAISE(ABORT, 'insert on other_transformation violates constraint: target_crs must not be deprecated when other_transformation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM crs_view crs WHERE crs.auth_name = NEW.target_crs_auth_name AND crs.code = NEW.target_crs_code AND crs.deprecated != 0) AND NEW.deprecated = 0 AND NOT (NEW.auth_name = 'ESRI');
    SELECT RAISE(ABORT, 'insert on other_transformation violates constraint: area_of_use must not be deprecated when other_transformation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM area WHERE area.auth_name = NEW.area_of_use_auth_name AND area.code = NEW.area_of_use_code AND area.deprecated != 0) AND NEW.deprecated = 0;
END;

-- Note: in EPSG, the steps might be to be chained in reverse order, so we cannot
-- enforce that source_crs_code == step1.source_crs_code etc
CREATE TABLE concatenated_operation(
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    name TEXT NOT NULL CHECK (length(name) >= 2),

    description TEXT,
    scope TEXT,

    source_crs_auth_name TEXT NOT NULL,
    source_crs_code TEXT NOT NULL,
    target_crs_auth_name TEXT NOT NULL,
    target_crs_code TEXT NOT NULL,

    area_of_use_auth_name TEXT NOT NULL,
    area_of_use_code TEXT NOT NULL,

    accuracy FLOAT CHECK (accuracy >= 0),

    operation_version TEXT, -- normally mandatory in OGC Topic 2 but optional here

    deprecated BOOLEAN NOT NULL CHECK (deprecated IN (0, 1)),

    CONSTRAINT pk_concatenated_operation PRIMARY KEY (auth_name, code),
    --CONSTRAINT fk_concatenated_operation_coordinate_operation FOREIGN KEY (auth_name, code) REFERENCES coordinate_operation(auth_name, code),
    --CONSTRAINT fk_concatenated_operation_source_crs FOREIGN KEY (source_crs_auth_name, source_crs_code) REFERENCES crs(auth_name, code),
    --CONSTRAINT fk_concatenated_operation_target_crs FOREIGN KEY (target_crs_auth_name, target_crs_code) REFERENCES crs(auth_name, code),
    CONSTRAINT fk_concatenated_operation_transformation_area FOREIGN KEY (area_of_use_auth_name, area_of_use_code) REFERENCES area(auth_name, code)
);

CREATE TRIGGER concatenated_operation_insert_trigger
BEFORE INSERT ON concatenated_operation
FOR EACH ROW BEGIN

    SELECT RAISE(ABORT, 'insert on concatenated_operation violates constraint: (auth_name, code) must not already exist in coordinate_operation_with_conversion_view')
        WHERE EXISTS (SELECT 1 FROM coordinate_operation_with_conversion_view covwv WHERE covwv.auth_name = NEW.auth_name AND covwv.code = NEW.code);

    SELECT RAISE(ABORT, 'insert on concatenated_operation violates constraint: source_crs(auth_name, code) not found')
        WHERE NOT EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.source_crs_auth_name AND crs_view.code = NEW.source_crs_code);

    SELECT RAISE(ABORT, 'insert on concatenated_operation violates constraint: target_crs(auth_name, code) not found')
        WHERE NOT EXISTS (SELECT 1 FROM crs_view WHERE crs_view.auth_name = NEW.target_crs_auth_name AND crs_view.code = NEW.target_crs_code);

    SELECT RAISE(ABORT, 'insert on concatenated_operation violates constraint: source_crs must not be deprecated when concatenated_operation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM crs_view crs WHERE crs.auth_name = NEW.source_crs_auth_name AND crs.code = NEW.source_crs_code AND crs.deprecated != 0) AND NEW.deprecated = 0 AND NOT (NEW.auth_name = 'ESRI');
    SELECT RAISE(ABORT, 'insert on concatenated_operation violates constraint: target_crs must not be deprecated when concatenated_operation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM crs_view crs WHERE crs.auth_name = NEW.target_crs_auth_name AND crs.code = NEW.target_crs_code AND crs.deprecated != 0) AND NEW.deprecated = 0 AND NOT (NEW.auth_name = 'ESRI');
    SELECT RAISE(ABORT, 'insert on concatenated_operation violates constraint: area_of_use must not be deprecated when concatenated_operation is not deprecated')
        WHERE EXISTS(SELECT 1 FROM area WHERE area.auth_name = NEW.area_of_use_auth_name AND area.code = NEW.area_of_use_code AND area.deprecated != 0) AND NEW.deprecated = 0;
END;

CREATE TABLE concatenated_operation_step(
    operation_auth_name TEXT NOT NULL CHECK (length(operation_auth_name) >= 1),
    operation_code TEXT NOT NULL CHECK (length(operation_code) >= 1),
    step_number INTEGER NOT NULL CHECK (step_number >= 1),
    step_auth_name TEXT NOT NULL CHECK (length(step_auth_name) >= 1),
    step_code TEXT NOT NULL CHECK (length(step_code) >= 1),

    CONSTRAINT pk_concatenated_operation_step PRIMARY KEY (operation_auth_name, operation_code, step_number)
    --CONSTRAINT fk_concatenated_operation_step_to_operation FOREIGN KEY (step_auth_name, step_code) REFERENCES coordinate_operation(auth_name, code)
);

CREATE TRIGGER concatenated_operation_step_insert_trigger
BEFORE INSERT ON concatenated_operation_step
FOR EACH ROW BEGIN

    SELECT RAISE(ABORT, 'insert on concatenated_operation_step violates constraint: (step_auth_name, step_code) must already exist in coordinate_operation_with_conversion_view')
        WHERE NOT EXISTS (SELECT 1 FROM coordinate_operation_with_conversion_view covwv WHERE covwv.auth_name = NEW.step_auth_name AND covwv.code = NEW.step_code);

    SELECT RAISE(ABORT, 'insert on concatenated_operation_step violates constraint: step should not be a concatenated_operation')
        WHERE EXISTS(SELECT 1 FROM concatenated_operation WHERE auth_name = NEW.step_auth_name AND code = NEW.step_code);

END;


CREATE TABLE geoid_model(
    name TEXT NOT NULL,
    operation_auth_name TEXT NOT NULL,
    operation_code TEXT NOT NULL,
    CONSTRAINT pk_geoid_model PRIMARY KEY (name, operation_auth_name, operation_code)
    -- CONSTRAINT fk_geoid_model_operation FOREIGN KEY (operation_auth_name, operation_code) REFERENCES coordinate_operation(auth_name, code)
);

CREATE TRIGGER geoid_model_insert_trigger
BEFORE INSERT ON geoid_model
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on geoid_model violates constraint: (operation_auth_name, operation_code) must already exist in coordinate_operation_with_conversion_view')
        WHERE NOT EXISTS (SELECT 1 FROM coordinate_operation_with_conversion_view covwv WHERE covwv.auth_name = NEW.operation_auth_name AND covwv.code = NEW.operation_code);
END;


CREATE TABLE alias_name(
    table_name TEXT NOT NULL CHECK (table_name IN (
        'unit_of_measure', 'celestial_body', 'ellipsoid', 
        'area', 'prime_meridian', 'geodetic_datum', 'vertical_datum', 'geodetic_crs',
        'projected_crs', 'vertical_crs', 'compound_crs', 'conversion', 'grid_transformation',
        'helmert_transformation', 'other_transformation', 'concatenated_operation')),
    auth_name TEXT NOT NULL CHECK (length(auth_name) >= 1),
    code TEXT NOT NULL CHECK (length(code) >= 1),
    alt_name TEXT NOT NULL CHECK (length(alt_name) >= 2),
    source TEXT
);

CREATE TRIGGER alias_name_insert_trigger
BEFORE INSERT ON alias_name
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on alias_name violates constraint: new entry refers to unexisting code')
        WHERE NOT EXISTS (SELECT 1 FROM object_view o WHERE o.table_name = NEW.table_name AND o.auth_name = NEW.auth_name AND o.code = NEW.code);
END;

-- For ESRI stuff
-- typically deprecated is the 'wkid' column of deprecated = 'yes' entries in the .csv files, and non_deprecates is the 'latestWkid' column
-- For EPSG, used to track superseded coordinate operations.
CREATE TABLE supersession(
    superseded_table_name TEXT NOT NULL CHECK (superseded_table_name IN (
        'unit_of_measure', 'celestial_body', 'ellipsoid', 
        'area', 'prime_meridian', 'geodetic_datum', 'vertical_datum', 'geodetic_crs',
        'projected_crs', 'vertical_crs', 'compound_crs', 'conversion', 'grid_transformation',
        'helmert_transformation', 'other_transformation', 'concatenated_operation')),
    superseded_auth_name TEXT NOT NULL,
    superseded_code TEXT NOT NULL,
    replacement_table_name TEXT NOT NULL CHECK (replacement_table_name IN (
        'unit_of_measure', 'celestial_body', 'ellipsoid', 
        'area', 'prime_meridian', 'geodetic_datum', 'vertical_datum', 'geodetic_crs',
        'projected_crs', 'vertical_crs', 'compound_crs', 'conversion', 'grid_transformation',
        'helmert_transformation', 'other_transformation', 'concatenated_operation')),
    replacement_auth_name TEXT NOT NULL,
    replacement_code TEXT NOT NULL,
    source TEXT
);

CREATE INDEX idx_supersession ON supersession(superseded_table_name, superseded_auth_name, superseded_code);

CREATE TRIGGER supersession_insert_trigger
BEFORE INSERT ON supersession
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on supersession violates constraint: superseded entry refers to unexisting code')
        WHERE NOT EXISTS (SELECT 1 FROM object_view o WHERE o.table_name = NEW.superseded_table_name AND o.auth_name = NEW.superseded_auth_name AND o.code = NEW.superseded_code);

    SELECT RAISE(ABORT, 'insert on supersession violates constraint: replacement entry refers to unexisting code')
        WHERE NOT EXISTS (SELECT 1 FROM object_view o WHERE o.table_name = NEW.replacement_table_name AND o.auth_name = NEW.replacement_auth_name AND o.code = NEW.replacement_code);
END;


CREATE TABLE deprecation(
    table_name TEXT NOT NULL CHECK (table_name IN (
        'unit_of_measure', 'celestial_body', 'ellipsoid',
        'area', 'prime_meridian', 'geodetic_datum', 'vertical_datum', 'geodetic_crs',
        'projected_crs', 'vertical_crs', 'compound_crs', 'conversion', 'grid_transformation',
        'helmert_transformation', 'other_transformation', 'concatenated_operation')),
    deprecated_auth_name TEXT NOT NULL,
    deprecated_code TEXT NOT NULL,
    replacement_auth_name TEXT NOT NULL,
    replacement_code TEXT NOT NULL,
    source TEXT
);

CREATE TRIGGER deprecation_insert_trigger
BEFORE INSERT ON deprecation
FOR EACH ROW BEGIN
    SELECT RAISE(ABORT, 'insert on deprecation violates constraint: deprecated entry refers to unexisting code')
        WHERE NOT EXISTS (SELECT 1 FROM object_view o WHERE o.table_name = NEW.table_name AND o.auth_name = NEW.deprecated_auth_name AND o.code = NEW.deprecated_code);

    SELECT RAISE(ABORT, 'insert on deprecation violates constraint: replacement entry refers to unexisting code')
        WHERE NOT EXISTS (SELECT 1 FROM object_view o WHERE o.table_name = NEW.table_name AND o.auth_name = NEW.replacement_auth_name AND o.code = NEW.replacement_code);
END;



CREATE VIEW coordinate_operation_view AS
    SELECT 'grid_transformation' AS table_name, auth_name, code, name,
           description, scope,
           method_auth_name, method_code, method_name, source_crs_auth_name,
           source_crs_code, target_crs_auth_name, target_crs_code,
           area_of_use_auth_name, area_of_use_code,
           accuracy, deprecated FROM grid_transformation
    UNION ALL
    SELECT 'helmert_transformation' AS table_name, auth_name, code, name,
           description, scope,
           method_auth_name, method_code, method_name, source_crs_auth_name,
           source_crs_code, target_crs_auth_name, target_crs_code,
           area_of_use_auth_name, area_of_use_code,
           accuracy, deprecated FROM helmert_transformation
    UNION ALL
    SELECT 'other_transformation' AS table_name, auth_name, code, name,
           description, scope,
           method_auth_name, method_code, method_name, source_crs_auth_name,
           source_crs_code, target_crs_auth_name, target_crs_code,
           area_of_use_auth_name, area_of_use_code,
           accuracy, deprecated FROM other_transformation
    UNION ALL
    SELECT 'concatenated_operation' AS table_name, auth_name, code, name,
           description, scope,
           NULL, NULL, NULL, source_crs_auth_name,
           source_crs_code, target_crs_auth_name, target_crs_code,
           area_of_use_auth_name, area_of_use_code,
           accuracy, deprecated FROM concatenated_operation
;

CREATE VIEW coordinate_operation_with_conversion_view AS
    SELECT auth_name, code, table_name AS type FROM coordinate_operation_view UNION ALL
    SELECT auth_name, code, 'conversion' FROM conversion_table;

CREATE VIEW crs_view AS
    SELECT 'geodetic_crs' AS table_name, auth_name, code, name, type,
           description, scope,
           area_of_use_auth_name, area_of_use_code,
           deprecated FROM geodetic_crs
    UNION ALL
    SELECT 'projected_crs' AS table_name, auth_name, code, name, 'projected',
           description, scope,
           area_of_use_auth_name, area_of_use_code,
           deprecated FROM projected_crs
    UNION ALL
    SELECT 'vertical_crs' AS table_name, auth_name, code, name, 'vertical',
           description, scope,
           area_of_use_auth_name, area_of_use_code,
           deprecated FROM vertical_crs
    UNION ALL
    SELECT 'compound_crs' AS table_name, auth_name, code, name, 'compound',
           description, scope,
           area_of_use_auth_name, area_of_use_code,
           deprecated FROM compound_crs
;

CREATE VIEW object_view AS
    SELECT 'unit_of_measure' AS table_name, auth_name, code, name, NULL as type, NULL as area_of_use_auth_name, NULL as area_of_use_code, deprecated FROM unit_of_measure
    UNION ALL
    SELECT 'celestial_body', auth_name, code, name, NULL, NULL, NULL, 0 FROM celestial_body
    UNION ALL
    SELECT 'ellipsoid', auth_name, code, name, NULL, NULL, NULL, deprecated FROM ellipsoid
    UNION ALL
    SELECT 'area', auth_name, code, name, NULL, NULL, NULL, deprecated FROM area
    UNION ALL
    SELECT 'prime_meridian', auth_name, code, name, NULL, NULL, NULL, deprecated FROM prime_meridian
    UNION ALL
    SELECT 'geodetic_datum', auth_name, code, name, NULL, area_of_use_auth_name, area_of_use_code, deprecated FROM geodetic_datum
    UNION ALL
    SELECT 'vertical_datum', auth_name, code, name, NULL, area_of_use_auth_name, area_of_use_code, deprecated FROM vertical_datum
    UNION ALL
    SELECT 'axis', auth_name, code, name, NULL, NULL, NULL, 0 as deprecated FROM axis
    UNION ALL
    SELECT table_name, auth_name, code, name, type, area_of_use_auth_name, area_of_use_code, deprecated FROM crs_view
    UNION ALL
    SELECT 'conversion', auth_name, code, name, NULL, area_of_use_auth_name, area_of_use_code, deprecated FROM conversion_table
    UNION ALL
    SELECT table_name, auth_name, code, name, NULL, area_of_use_auth_name, area_of_use_code, deprecated FROM coordinate_operation_view
;

CREATE VIEW authority_list AS
    SELECT DISTINCT auth_name FROM unit_of_measure
    UNION
    SELECT DISTINCT auth_name FROM celestial_body
    UNION
    SELECT DISTINCT auth_name FROM ellipsoid
    UNION
    SELECT DISTINCT auth_name FROM area
    UNION
    SELECT DISTINCT auth_name FROM prime_meridian
    UNION
    SELECT DISTINCT auth_name FROM geodetic_datum
    UNION
    SELECT DISTINCT auth_name FROM vertical_datum
    UNION
    SELECT DISTINCT auth_name FROM axis
    UNION
    SELECT DISTINCT auth_name FROM crs_view
    UNION
    SELECT DISTINCT auth_name FROM coordinate_operation_view
;

-- Define the allowed authorities, and their precedence, when researching a
-- coordinate operation
CREATE TABLE authority_to_authority_preference(
    source_auth_name TEXT NOT NULL, -- 'any' for any source
    target_auth_name TEXT NOT NULL, -- 'any' for any target
    allowed_authorities TEXT NOT NULL,  -- for example 'PROJ,EPSG,any'
    CONSTRAINT unique_authority_to_authority_preference UNIQUE (source_auth_name, target_auth_name)
);
