DataHub

is a generic concept - a piece of software which accepts data entries from source systems, stores them, sorts and modifies them according to specified rules, and sends them to assigned target systems. This repo contains PL/SQL scripts which are capable of decorating an Oracle DB table by additional structure in order to facilitate this process. I shall call such decoration a "channel".

Overview

Let there be a table, with a single-column primary key, which can store all data of interest. The attached PL/SQL scripts will perform the following operations:

General tables, one collection can serve multiple channels

1. 01gl_create_entry_state_tbl.txt
   • Creates a table of states the entries can be in as they pass through the DataHub
2. 02gl_create_external_system_tbl.txt
   • Creates a table of external systems the DataHub will interact with
3. 03gl_create_data_flow_tbl.txt
   • Creates a table for bookkeeping of import and export processes

Specific tables, one collection per channel

4. 04loc_decorate_main_tbl.txt
   • Decorates the main table with a few technical attributes
     • status - how far the row is in processing
     • status_dtl - comment on status
     • target_system - to which system the row shall be sent
     • source_obj - how it got in
     • target_obj - how it got / will get out
     • current_mod_src_type + current_mod_src - circumstances of row updates
5. 05loc_create_hist_tbl.txt
   • Creates a table to keep track of modifications on the main table's data
   • Attributes are mostly self-explanatory, refer to the content of point 6 if in doubt
   • TODO: make the script automatically determine how long target_old_val and target_new_val have to be
6. 06loc_create_hist_trigger.txt
   • Creates a trigger which will write to the table mentioned in point 5
7. 07loc_create_rule_tbl.txt
   • Creates a table of rules
     • Rules will sort and modify pending entries in the main table
   • creation_date, active_from and active_to are self-explanatory, please refer to the content of point 9 for the rest
8. 08loc_create_rule_log_tbl.txt
   • Creates a table designated for logging of rule application procedure executions
9. 09loc_create_rule_proc_package.txt
   • Creates a package consisting of the following procedures
     • Apply rules
     • Apply rules onwards from a rule of specified OID
     • Log start of an application procedure execution
     • Log end of an application procedure execution

Every script prints out the code it intends to execute; I encourage your caution and dilligence, use the comment functionality.

License

MIT License

Copyright (c) 2023 GateDigger

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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