Impl Business Layer Abstraction 2.0

[felix-reichel]

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Variable Domain Processing

Workflow:

1. Variable Domain?

   • (allDBDataForVariableDomainIsLoaded?)
     • processInWeekBatches(variableDomain)
     • processInMonthlyBatches(variableDomain)

2. Steps to Execute:

   • (a) Determine Domain
   • (b) Determine Render Strategy
   • (c) Call Loaders
   • (d) Compute From Below
   • (e) Store To Grid (or on error: rollback)

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CASE UNREALISTIC:

GIVEN

1. The fully constructed (max. covering) (i, j, t)-results_space exists,
2. AND all data is currently loaded into the DB.

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For Every Possible args/(i, j, t) Combination Perform the Following:

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Pseudo-Code Routine: Part 1

_Processing for a single args/(i, j, t)-variant variable in a fully constructed (i, j, t)-results_space:_

Variable_name_arg = "clicks_"

// Check if variable exists
// variable_does_even_exist_lookup()

variant_result = 'ijt'  # args, var variancy result; needed for WHERE-Clause

# Perform a check
check(*args, variant_result):
    i = args[0]
    i is Not Null & j is not null & t is not null?

# Calculate Unix Time Bounds
u_lower_bound_from_t = u_lower(t)
u_upper_bound_from_t = u_upper(t)

// Collect exclusion criteria
// buildQueryWith (Criterion(), get ijt_WHERE_CLAUSE, ….)

# Example query (q1) result
q1 :=
SELECT SUM(c.clicks), 
       c.produkt_id, 
       c.haendler_bez, 
       DB_FUNC_GET_T_FROM_U(c.timestamp, UNIX_ORIGIN) as db_t
FROM clicks c
WHERE 
    c.produkt_id = i         # get ijt_WHERE_CLAUSE
    AND c.haendler_bez = j 
    AND c.timestamp BETWEEN u_lower_bound_from_t AND u_upper_bound_from_t
    AND NOT EXISTS (
        SELECT 1 
        FROM scrapper_ips si 
        WHERE c.user_ip = si.user_ip
    )  # Append EXCLUSION CRITERION
GROUP BY i, j, db_t;

// Retrieve result
getAsPl(q1)

// Variable value realization found
var_result_value = SUM(c.clicks)  # Can be any SQL aggregate function (MIN, MAX, AVG, SUM)

// Perform a sanity check
sanity_check():
    db_t == t ?
    -26 <= t <= 832 ?   
    -26 <= db_t <= 832 ?