-- This is the database schema for the 'scan-lvm Scan Agent'.


-- This table stores physical volume information
CREATE TABLE scan_lvm_pvs (
    scan_lvm_pv_uuid             uuid                        primary key,    
    scan_lvm_pv_host_uuid        uuid                        not null,
    scan_lvm_pv_internal_uuid    text                        not null,       -- This comes from the PV itself. This is not a valid UUID format, so we use it more as a "serial number"
    scan_lvm_pv_name             text                        not null,       -- This is the name of the PV.  
    scan_lvm_pv_used_by_vg       text                        not null,       -- This is the name of the VG that uses this PV. If it's blank, then no VG uses it yet.  
    scan_lvm_pv_attributes       text                        not null,       -- This is the short 3-character attribute of the PV
    scan_lvm_pv_size             numeric                     not null,       -- The size of the PV in bytes
    scan_lvm_pv_free             numeric                     not null,       -- The free space, in bytes.
    modified_date                timestamp with time zone    not null,
    
    FOREIGN KEY(scan_lvm_pv_host_uuid) REFERENCES hosts(host_uuid)
);
ALTER TABLE scan_lvm_pvs OWNER TO admin;

CREATE TABLE history.scan_lvm_pvs (
    history_id                   bigserial,
    scan_lvm_pv_uuid             uuid,
    scan_lvm_pv_host_uuid        uuid,
    scan_lvm_pv_internal_uuid    text,
    scan_lvm_pv_name             text,
    scan_lvm_pv_used_by_vg       text,
    scan_lvm_pv_attributes       text,
    scan_lvm_pv_size             numeric,
    scan_lvm_pv_free             numeric,
    modified_date                timestamp with time zone    not null
);
ALTER TABLE history.scan_lvm_pvs OWNER TO admin;

CREATE FUNCTION history_scan_lvm_pvs() RETURNS trigger
AS $$
DECLARE
    history_scan_lvm_pvs RECORD;
BEGIN
    SELECT INTO history_scan_lvm_pvs * FROM scan_lvm_pvs WHERE scan_lvm_pv_uuid=new.scan_lvm_pv_uuid;
    INSERT INTO history.scan_lvm_pvs
        (scan_lvm_pv_uuid,
         scan_lvm_pv_host_uuid, 
         scan_lvm_pv_internal_uuid, 
         scan_lvm_pv_name, 
         scan_lvm_pv_used_by_vg, 
         scan_lvm_pv_attributes, 
         scan_lvm_pv_size, 
         scan_lvm_pv_free, 
         modified_date)
    VALUES
        (history_scan_lvm_pvs.scan_lvm_pv_uuid,
         history_scan_lvm_pvs.scan_lvm_pv_host_uuid, 
         history_scan_lvm_pvs.scan_lvm_pv_internal_uuid, 
         history_scan_lvm_pvs.scan_lvm_pv_name, 
         history_scan_lvm_pvs.scan_lvm_pv_used_by_vg, 
         history_scan_lvm_pvs.scan_lvm_pv_attributes, 
         history_scan_lvm_pvs.scan_lvm_pv_size, 
	 history_scan_lvm_pvs.scan_lvm_pv_free, 
         history_scan_lvm_pvs.modified_date);
    RETURN NULL;
END;
$$
LANGUAGE plpgsql;
ALTER FUNCTION history_scan_lvm_pvs() OWNER TO admin;

CREATE TRIGGER trigger_scan_lvm_pvs
    AFTER INSERT OR UPDATE ON scan_lvm_pvs
    FOR EACH ROW EXECUTE PROCEDURE history_scan_lvm_pvs();


-- This table stores volume group information
CREATE TABLE scan_lvm_vgs (
    scan_lvm_vg_uuid             uuid                        primary key,
    scan_lvm_vg_host_uuid        uuid                        not null,
    scan_lvm_vg_internal_uuid    text                        not null,       -- This comes from the VG itself. This is not a valid UUID format, so we use it more as a "serial number"
    scan_lvm_vg_name             text                        not null,       -- This is the name of the VG.  
    scan_lvm_vg_attributes       text                        not null,       -- This is the short 6-character attribute of the VG
    scan_lvm_vg_extent_size      numeric                     not null,       -- The size of each physical extent, in bytes.
    scan_lvm_vg_size             numeric                     not null,       -- The size of the VG, in bytes.
    scan_lvm_vg_free             numeric                     not null,       -- The free space in the VG, in bytes.
    modified_date                timestamp with time zone    not null,
    
    FOREIGN KEY(scan_lvm_vg_host_uuid) REFERENCES hosts(host_uuid)
);
ALTER TABLE scan_lvm_vgs OWNER TO admin;

CREATE TABLE history.scan_lvm_vgs (
    history_id                   bigserial,
    scan_lvm_vg_uuid             uuid,
    scan_lvm_vg_host_uuid        uuid,
    scan_lvm_vg_internal_uuid    text,
    scan_lvm_vg_name             text,
    scan_lvm_vg_attributes       text,
    scan_lvm_vg_extent_size      numeric,
    scan_lvm_vg_size             numeric,
    scan_lvm_vg_free             numeric,
    modified_date                timestamp with time zone    not null
);
ALTER TABLE history.scan_lvm_vgs OWNER TO admin;

CREATE FUNCTION history_scan_lvm_vgs() RETURNS trigger
AS $$
DECLARE
    history_scan_lvm_vgs RECORD;
BEGIN
    SELECT INTO history_scan_lvm_vgs * FROM scan_lvm_vgs WHERE scan_lvm_vg_uuid=new.scan_lvm_vg_uuid;
    INSERT INTO history.scan_lvm_vgs
        (scan_lvm_vg_uuid,
         scan_lvm_vg_host_uuid, 
         scan_lvm_vg_internal_uuid, 
         scan_lvm_vg_name, 
         scan_lvm_vg_attributes,
         scan_lvm_vg_extent_size,
         scan_lvm_vg_size,
         scan_lvm_vg_free,
         modified_date)
    VALUES
        (history_scan_lvm_vgs.scan_lvm_vg_uuid,
         history_scan_lvm_vgs.scan_lvm_vg_host_uuid, 
         history_scan_lvm_vgs.scan_lvm_vg_internal_uuid, 
         history_scan_lvm_vgs.scan_lvm_vg_name, 
         history_scan_lvm_vgs.scan_lvm_vg_attributes,
         history_scan_lvm_vgs.scan_lvm_vg_extent_size,
         history_scan_lvm_vgs.scan_lvm_vg_size,
         history_scan_lvm_vgs.scan_lvm_vg_free,
         history_scan_lvm_vgs.modified_date);
    RETURN NULL;
END;
$$
LANGUAGE plpgsql;
ALTER FUNCTION history_scan_lvm_vgs() OWNER TO admin;

CREATE TRIGGER trigger_scan_lvm_vgs
    AFTER INSERT OR UPDATE ON scan_lvm_vgs
    FOR EACH ROW EXECUTE PROCEDURE history_scan_lvm_vgs();


--lvs - lv_name,lv_uuid,lv_attr,vg_name,lv_size,lv_path,devices
CREATE TABLE scan_lvm_lvs (
    scan_lvm_lv_uuid             uuid                        primary key,
    scan_lvm_lv_host_uuid        uuid                        not null,
    scan_lvm_lv_internal_uuid    text                        not null,       -- This comes from the LV itself. This is not a valid UUID format, so we use it more as a "serial number"
    scan_lvm_lv_name             text                        not null,       -- This is the name of the VG.  
    scan_lvm_lv_attributes       text                        not null,       -- This is the short 9-character attribute of the LV
    scan_lvm_lv_on_vg            text                        not null,       -- This is the name of the volume group this LV is on
    scan_lvm_lv_size             numeric                     not null,       -- The size of the VG, in bytes.
    scan_lvm_lv_path             text                        not null,       -- The device path to this LV
    scan_lvm_lv_on_pvs           text                        not null,       -- This is a comma-separated list of PVs this LV spans over.
    modified_date                timestamp with time zone    not null,
    
    FOREIGN KEY(scan_lvm_lv_host_uuid) REFERENCES hosts(host_uuid)
);
ALTER TABLE scan_lvm_lvs OWNER TO admin;

CREATE TABLE history.scan_lvm_lvs (
    history_id                   bigserial,
    scan_lvm_lv_uuid             uuid,
    scan_lvm_lv_host_uuid        uuid,
    scan_lvm_lv_internal_uuid    text, 
    scan_lvm_lv_name             text,
    scan_lvm_lv_attributes       text,
    scan_lvm_lv_on_vg            text,
    scan_lvm_lv_size             numeric,
    scan_lvm_lv_path             text,
    scan_lvm_lv_on_pvs           text,
    modified_date                timestamp with time zone    not null
);
ALTER TABLE history.scan_lvm_lvs OWNER TO admin;

CREATE FUNCTION history_scan_lvm_lvs() RETURNS trigger
AS $$
DECLARE
    history_scan_lvm_lvs RECORD;
BEGIN
    SELECT INTO history_scan_lvm_lvs * FROM scan_lvm_lvs WHERE scan_lvm_lv_uuid=new.scan_lvm_lv_uuid;
    INSERT INTO history.scan_lvm_lvs
        (scan_lvm_lv_uuid,
         scan_lvm_lv_host_uuid, 
         scan_lvm_lv_internal_uuid, 
         scan_lvm_lv_name, 
         scan_lvm_lv_attributes,
         scan_lvm_lv_on_vg,
         scan_lvm_lv_size,
         scan_lvm_lv_path,
         scan_lvm_lv_on_pvs,
         modified_date)
    VALUES
        (history_scan_lvm_lvs.scan_lvm_lv_uuid,
         history_scan_lvm_lvs.scan_lvm_lv_host_uuid, 
         history_scan_lvm_lvs.scan_lvm_lv_internal_uuid, 
         history_scan_lvm_lvs.scan_lvm_lv_name, 
         history_scan_lvm_lvs.scan_lvm_lv_attributes,
         history_scan_lvm_lvs.scan_lvm_lv_on_vg,
         history_scan_lvm_lvs.scan_lvm_lv_size,
         history_scan_lvm_lvs.scan_lvm_lv_path,
         history_scan_lvm_lvs.scan_lvm_lv_on_pvs,
         history_scan_lvm_lvs.modified_date);
    RETURN NULL;
END;
$$
LANGUAGE plpgsql;
ALTER FUNCTION history_scan_lvm_lvs() OWNER TO admin;

CREATE TRIGGER trigger_scan_lvm_lvs
    AFTER INSERT OR UPDATE ON scan_lvm_lvs
    FOR EACH ROW EXECUTE PROCEDURE history_scan_lvm_lvs();