Database X to Database Y · Mainframe & LUW Database Replatforming Brief: VNA-SB-026 · Redwood Flavor: Canyon Ochre Designed by Viscosity.AI
IBM Db2 (z/OS & LUW) to Oracle 23ai Migration VNA-SB-026 · Stack Modernization Architecture
Search Intent: IBM Db2 to Oracle 23ai Migration ยท Mainframe z/OS, AS/400 & Db2 LUW Exit

Migrate IBM Db2 (z/OS, AS/400 & LUW) to Oracle 23ai and Eliminate Mainframe MIPS.

Escalating IBM mainframe MLC/MIPS charges and Db2 LUW subscription renewals consume millions in IT budget while locking core data inside EBCDIC tables and legacy SQL PL routines. We engineer zero-downtime migrations from IBM Db2 (z/OS, iSeries, and LUW) to Oracle Database 23ai using automated SQL PL-to-PL/SQL AST translation, EBCDIC-to-AL32UTF8 character set conversion, and Oracle GoldenGate for Db2 real-time Change Data Capture.

MIPS & License Savings
55% - 78% Lower TCO
SQL PL -> PL/SQL AST
91% Automated Translation
EBCDIC / COMP-3 Parity
100% Bit-Level Verified
Cutover Window
Near-Zero via GoldenGate Db2
Request the PDF Solution Brief (VNA-SB-026) → Download Modifiable RFP Template & Q/A
Specific Engineering Search Queries Covered in This Brief:
  • IBM Db2 to Oracle migration
  • migrate Db2 z/OS mainframe to Oracle Exadata 23ai
  • convert Db2 SQL PL stored procedures to Oracle PL/SQL
  • IBM iSeries AS/400 Db2 400 to Oracle migration
  • EBCDIC COMP-3 packed decimal to Oracle NUMBER conversion
IBM Db2 (z/OS & LUW) to Oracle 23ai Migration · Problem Space & Technical Solution

IBM Db2 for z/OS, iSeries (AS/400) & Db2 LUW Migration to Oracle Database 23ai & Exadata

Every conversion and modernization program requires separating legacy presentation artifacts from data-tier business rules so your modernized platform runs faster, costs less to license, and stays upgrade-safe.

The Legacy Bottleneck (Problem Space)

  • IBM z/OS Monthly License Charges (MLC) and MIPS-based pricing penalize every new analytics query, API call, or digital channel hitting Db2.
  • Db2 z/OS and AS/400 schemas rely on EBCDIC collating sequences, packed decimal (COMP-3) copybooks, and Db2-specific SQLCODE/SQLSTATE cursor semantics that break naive migration tools.
  • Tightly coupled CICS screens, green-screen 5250 RPG programs, and overnight JCL/COBOL batch jobs require phased coexistence with the new database.

The Engineered Target Architecture

  • Automated DDL & Data Type Mapping: Convert Db2 TABLESPACES, GRAPHIC/VARGRAPHIC, DECFLOAT, and packed decimals into Oracle 23ai tablespaces, NUMBER, and UTF-8 columns with linguistic binary sort (`NLS_SORT=EBCDIC`) where legacy sort order is required.
  • SQL PL & Embedded SQL Translation: Parse Db2 SQL PL procedures, DB2triggers, and Pro*COBOL / embedded SQL cursor loops into compiled Oracle 23ai PL/SQL packages.
  • Batch & UI Modernization: Convert JCL/SORT batch steps into high-speed Oracle bulk PL/SQL (`FORALL`) and `DBMS_SCHEDULER` chains, while replacing CICS / 5250 green screens with Oracle APEX 24.2.
  • Real-Time Coexistence: Stream live transactions from Db2 z/OS (IFI 306 log read) or Db2 LUW into Oracle 23ai via Oracle GoldenGate for parallel validation before final cutover.
Anonymized Production Proof · Verified Architecture Outcome

Migrated a 14 TB IBM Db2 environment (3,100 tables and 1,450 SQL PL stored procedures) to Oracle Database on Exadata with GoldenGate real-time replication, cutting annual IBM software maintenance by 64% and reducing nightly batch execution from 4.5 hours to 38 minutes.

Interactive Architecture Sizer & TCO Estimator · VNA-SB-026

IBM Db2 (z/OS, AS/400 & LUW) to Oracle 23ai Estimator

Adjust the sliders below to model your current source environment (including query fan-out rationalization where core SQL queries are built once and WHERE clauses/filters execute at runtime or via AI inference) and preview target sizing, timeline, and annual savings.

1200 tables
600 programs
SQL PL -> PL/SQL & EBCDIC Conversion
Calculating...
Batch Window Reduction on Oracle 23ai
Calculating...
Phased GoldenGate Coexistence Timeline
Calculating...
Projected Annual Mainframe MIPS & Db2 Savings
Calculating...
Benchmarks derived from anonymized production conversions by Viscosity.AI
Component & Workload Mapping

IBM Db2 (z/OS & LUW) to Oracle 23ai Migration - Component Conversion Matrix

Search and inspect how each legacy component, database object, or cloud workload maps to the target architecture.

IBM Db2 for z/OS, iSeries (AS/400) & Db2 LUW Migration to Oracle Database 23ai & Exadata - Component Mapping & Engineering Method (VNA-SB-026)
Legacy Artifact / Baseline Workload Modernized Target Architecture Engineering Method & Outcome
Db2 SQL PL Stored Procedures & UDFs Oracle 23ai PL/SQL Packages & Pipelined Functions AST translation of DECLARE CURSOR WITH HOLD, SQLCODE handlers, and DGTT temp tables
EBCDIC Character Data & Collating Sequence Oracle AL32UTF8 + NLS_SORT=EBCDIC Functional Indexes Transcode CCSID 37/500/1140 to UTF-8 while preserving exact mainframe ORDER BY behavior
COBOL Copybooks & Packed Decimal (COMP-3) Oracle 23ai NUMBER(p,s) + External Tables / SQL*Loader Unpack binary COMP/COMP-3 fields with automated precision and checksum reconciliation
CICS BMS Maps & AS/400 5250 Display Files (DSPF) Oracle APEX 24.2 Keyboard-Driven Web Forms & Grids Preserve sub-second hotkey data-entry ergonomics inside modern browser pages
JCL / DFSORT Overnight Batch Streams DBMS_SCHEDULER Chains + Parallel SQL / PL/SQL Replace multi-hour tape/disk sort steps with in-database parallel hash joins
Core Platform & Ancillary Tooling

Oracle APEX, Database 23ai & Cloud Engineering Stack

We stay strictly in our high-leverage engineering lanes, combining Oracle APEX 24.2, ORDS, Viscosity AMP, SQLcl Liquibase, GoldenGate, Engineered Systems, and cloud-native automation.

Oracle Database 23ai on Exadata Cloud@Customer (ExaCC), OCI, or ODA X11
Oracle GoldenGate for Db2 (z/OS IFI 306, iSeries Journal, and Db2 LUW CDC)
Oracle SQL Developer Migration Workbench & Viscosity SQL PL AST Transpiler
Oracle APEX 24.2 (Mainframe CICS / 5250 Green-Screen Replacement)
Oracle SQLcl Liquibase & utPLSQL Automated Reconciliation Harness
Stakeholder & Buyer Persona Alignment · Cluster C: Mainframe, Unix & Core Database Exit

How Practitioner Champions, Technical Validators & Economic Buyers Use This Blueprint

1. Practitioner Champion (Pain-Holder)

Mainframe Db2 (z/OS) & IBM iSeries (AS/400) Lead, Db2 LUW Principal DBA, COBOL / SQL PL Migration Architect

Automate SQL PL to PL/SQL AST translation, unpack COBOL COMP-3 copybooks, and preserve EBCDIC collating sort order via `NLS_SORT=EBCDIC` functional indexes.

Model Footprint in Interactive Sizer →
2. Technical Validator & Architect

VP of Mainframe & Core Infrastructure, Chief Database Architect, Director of Core Banking / Insurance / Logistics Systems

Oracle GoldenGate for Db2 (z/OS IFI 306 and iSeries journals) enables sub-second bi-directional coexistence while CICS/5250 screens transition to APEX.

Inspect Component Conversion Matrix →
3. Economic & License-Exit Buyer

CIO / CFO, VP of Infrastructure & Mainframe Exit

Eliminate escalating IBM z/OS Monthly License Charges (MLC / MIPS) and cut annual database software TCO by 55% to 78%.

Download Modifiable RFP & PDF Brief →
Procurement & Architecture Kit · Writing an RFP for IBM Db2 (z/OS & LUW) to Oracle 23ai Migration?

Download the Modifiable RFP Template & Vendor Q/A Rubric

If your team is preparing a Request for Proposals (RFP) for IBM Db2 for z/OS, iSeries (AS/400) & Db2 LUW Migration to Oracle Database 23ai & Exadata, download our ready-to-customize RFP template below. It includes modifiable baseline inventory tables, mandatory technical scope requirements, fixed-fee milestone pricing schedules, and a scored Vendor Q&A questionnaire with evaluation benchmark keys.

What Is Inside the Modifiable RFP Template

  • Section 1 & 2 - Modifiable Organization Schedule & Baseline Inventory: Plug-in tables for your exact IBM Db2 for z/OS (Mainframe), Db2 for i (AS/400), Db2 LUW 11.5, SQL PL, EBCDIC, JCL/COBOL object counts, database volume, SLAs, and procurement dates.
  • Section 3 - Mandatory Technical Scope & Conversion Matrix: Artifact-by-artifact acceptance criteria mapping IBM Db2 for z/OS (Mainframe), Db2 for i (AS/400), Db2 LUW 11.5, SQL PL, EBCDIC, JCL/COBOL to Oracle Database 23ai on OCI / Exadata / ODA X11, PL/SQL Packages, GoldenGate Db2 CDC (including AST discovery and query fan-out rationalization).
  • Section 4 - Scored Vendor Q&A Questionnaire & Benchmark Key: Domain-specific technical and licensing questions with a 10-point evaluation rubric so your committee can separate true automation from manual rewrite shops.
  • Section 5 & 6 - Fixed-Fee Milestone Pricing & Evaluation Scorecard: Standardized 4-phase pricing matrix (Phase 0 AST Discovery through Phase 3 Zero-Downtime Cutover).

Unlock & Email Your RFP Template Kit (Microsoft Word .DOCX + PDF)

Complete the quick request form below to immediately unlock the editable Microsoft Word (.docx) RFP template (formatted with native Word tables, bracketed fill-in fields, and vendor response boxes) and the executive PDF edition, plus receive the full kit by email.

Editable Word Edition: ibm-db2-mainframe-to-oracle-23ai-rfp-template.docx (Native Microsoft Word / Google Docs)
Executive PDF Edition: VNA-SB-026-RFP-Template.pdf
Includes: Editable Scope Tables + Scored Vendor Q&A + Milestone Pricing
Principal Architect Q&A

Frequently Asked Technical & Licensing Questions

Direct answers to the architectural, licensing, and cutover questions raised by CIOs, VPs of Engineering, and Enterprise DBAs.

How do you handle mainframe applications that rely on EBCDIC sort order (where numbers sort after letters)?

In EBCDIC, uppercase letters sort before digits (0-9), whereas in ASCII/UTF-8 digits sort before letters. For queries and batch programs that depend on mainframe sort order, we apply Oracle linguistic sorting (NLSSORT with EBCDIC) and function-based indexes so data is stored cleanly in UTF-8 while returning identical sort order.

Can we migrate Db2 to Oracle in phases while CICS or COBOL applications are still running?

Yes. Using Oracle GoldenGate for Db2 (supporting z/OS, iSeries journals, and LUW logs), we maintain sub-second bi-directional or uni-directional replication between Db2 and Oracle 23ai so workloads can cut over domain by domain.

Instant Download & Email Copy · VNA-SB-026

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