--Author: sdt-mvasylovskyi

--Forward

BEGIN
IF (
    EXISTS (
        SELECT 1
        FROM INFORMATION_SCHEMA.TABLES
        WHERE TABLE_SCHEMA ILIKE 'cci'
        AND TABLE_NAME ILIKE 'FactStrategicChargeCodeDetail'
    )    
)
THEN
    IF (
        NOT EXISTS (
            SELECT 1
            FROM INFORMATION_SCHEMA.COLUMNS
            WHERE TABLE_SCHEMA ILIKE 'cci'
            AND TABLE_NAME ILIKE 'FactStrategicChargeCodeDetail'
            AND COLUMN_NAME ILIKE 'DistributedUnits'
        )    
    )
    THEN
        ALTER TABLE cci.FactStrategicChargeCodeDetail
        ADD COLUMN DistributedUnits FLOAT NOT NULL DEFAULT(0);
    END IF;

    IF (
        NOT EXISTS (
            SELECT 1
            FROM INFORMATION_SCHEMA.COLUMNS
            WHERE TABLE_SCHEMA ILIKE 'cci'
            AND TABLE_NAME ILIKE 'FactStrategicChargeCodeDetail'
            AND COLUMN_NAME ILIKE 'DistributedCost'
        )    
    )
    THEN
        ALTER TABLE cci.FactStrategicChargeCodeDetail
        ADD COLUMN DistributedCost FLOAT NOT NULL DEFAULT(0);
    END IF;
END IF;
END;

--Rollback

BEGIN
IF (
    EXISTS (
        SELECT 1
        FROM INFORMATION_SCHEMA.TABLES
        WHERE TABLE_SCHEMA ILIKE 'cci'
        AND TABLE_NAME ILIKE 'FactStrategicChargeCodeDetail'
    )     
)
THEN
    ALTER TABLE cci.FactStrategicChargeCodeDetail
    DROP COLUMN IF EXISTS DistributedUnits;
    ALTER TABLE cci.FactStrategicChargeCodeDetail
    DROP COLUMN IF EXISTS DistributedCost;
END IF;
END;