Page Comparison

Table of Contents

Listing of Data Warehouse Tables

DIM	FACT	HIST	DW	PPI	STG

Dimension modelling reference tables	Dimension modelling fact tables	Daily balance tables derived from Data Warehouse fact tables.	Lookup tables copied from mifos OLTP data.		Staging tables. Not used for reporting.
dim_date	fact_loan_disbursals	hist_loan_balances	dw_account_action	dw_ppi_survey	stg_personnel_names_and_name_changes
dim_product	fact_loan_repayments	hist_loan_arrears	dw_currency	ppi_category_likelihood_bands	stg_customer_and_account_updates
dim_office	fact_loan_fees_and_charges	hist_savings_balances	dw_fee	fact_ppi_survey_results	stg_customer_type1_columns
dim_personnel	fact_customer_fees_and_charges		dw_fund		stg_loan_type1_columns
dim_customer	fact_savings_transactions		dw_mfi_configuration
dim_loan	fact_client_attendances		Lookup tables for Data Warehouse convenience		stg_etl_run_history
dim_savings	Schedule tables cut down and copied to Data Warehouse to allow some processing of Due Vs Collected type functionality		dw_account_charge_type
	dw_loan_schedules		dw_arrears_band_monthly
	dw_loan_fee_schedules		dw_arrears_band_weekly
	dw_customer_schedules
	dw_customer_fee_schedules

WIP: Items below to be updated to match the table listing above

DIM Tables

FACT Tables

HIST Tables

The following 'hist' tables hold daily balances for 'active' accounts and are derived from other data warehouse tables. These tables do increase the size of the data warehouse database substantially but offer improved performance and simpler querying.

hist_loan_balances and hist_loan_arrears provides the simplest and quickest way of identifying PAR values at MFI, branch, loan officer, center and groups levels at any point in time.

hist_loan_balances

Contains daily balances for 'active' loan accounts (good and bad standing status's). Doesn't included reversed transactions as they affect the 'as of' situation.
For example, a loan might be active on Jan 1 (so should appear on a report run for Jan 1). On Jan 2, the loan may be reversed which creates backdated transactions to contra all repayment and disbursal transactions created.
Example of listing all loans as of 1st Aug 2010:

Code Block


SELECT cust.display_name, l.loan_account_id, l.loan_amount, l.loan_status, l.disbursement_date,
       ifnull(lb.principal_outstanding, 0.000) balance
FROM dim_loan l
LEFT JOIN dim_customer cust ON cust.customer_key = l.customer_key
LEFT JOIN hist_loan_balances lb ON lb.loan_account_id = l.loan_account_id and lb.as_of_date = '2010-08-01'
WHERE  (l.valid_from <= '2010-08-01' and l.valid_to > '2010-08-01')
ORDER BY cust.display_name, l.loan_account_id

hist_loan_arrears

Contains daily balances for over due loans (hist_loans_overdue is a more correct table name).

Overdue: loan is not fully up to date with repayment schedule
In Arrears: loan is overdue by more than 'lateness' days (where lateness is defined within mifos Admin functionality and copied to DW table dw_mfi_configuration).

hist_savings_balances

Contains daily balances for 'active' savings accounts (active and inactive status's).

DW Tables

PPI Tables

STG Tables

DW Picture

Overview - Dimension tables surrounding fact tables

A representation (slightly out of date) of how DW 1.0 solves the gnarly aspect of reporting on transaction totals and arrears aging information at MFI/Branch/Loan Officer/Center levels on current and historical date ranges is ...

Star Schema Involving fact_loan_repayments

A representation of how reporting on loan repayments at MFI/Branch/Loan Officer/Center levels on current and historical date ranges is generally is solved by DW 1.0 is ...

Metrics Reporting

A representation of how DW 1.0 solves reporting on 'metrics' at MFI/Branch/Loan Officer/Center levels on current and historical date ranges is ...

(put dim hierarchy piccy here)

High level DW table Info

These tables are currently deployed and being road tested during report development on the development reporting sandbox. Access to this box is restricted but for those with access... the database is called mifos_secdep_dwh and early (poorly presented by me) reports are running from sandbox-reporting.mifos.org/pentaho/Home under the solutions directory JPWWIP/DW standard reports.

...

Table Name	Description	ETL Approach
dw_mfi_configuration	currently contains: loan_lateness_days - no. of days before a loan is considered in bad standing (is used in arrears reporting) savings_dormancy_days - no. of days before a savings active is dormant before it is considered inactive (not currently used in mifos or DW)	Loaded from prd_type mifos table
dw_loan_schedules	loan schedule details (was a 'fact' table but decided against that as found it very hard to keep schedule entries tracked to the dim_loan entries.	Transactions simply extracted from mifos equivalent. Only links to the loan_account_id not a specific entry in dim_loan. Need to be updated if the schedule dates change (if disbursed on a date different to the expected date).
dw_account_charge_type	Indicates the type of fee...charge/fee/penalty - use on the fee transaction tables Values are 1 Periodic and Upfront Fees (get fee frequency info from dim_fee)

...

2. Misc. Fees/Charges
3. Misc. Penalties

preloaded with DW.

Versions Compared

Old Version 3

New Version Current

Key