# Database Schema Comparison Report

**Date:** 2025-11-20
**Comparison:** database-backup-11-20-25-eod-with-drop.sql vs Current Dev Database
**Dev Backup Created:** /home/camp/projects/windows/shopdb/sql/dev-backup-20251120-105614.sql

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## Executive Summary

The backup file contains **Phase 1 schema** (pre-migration) with 63 tables, while the current dev database contains **Phase 2 schema** (post-migration) with 30 tables.

**Key Findings:**
- ✅ **4 tables have schema changes** (businessunits, controllertypes, machine_overrides, machines)
- ✅ **8 new Phase 2 tables** exist in dev but not in backup
- ✅ **41 legacy tables** exist in backup but not in dev (deprecated/views)

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## Tables Requiring DROP and Recreate

### 1. Tables with Schema Changes (4 tables)

These tables exist in both files but have different column structures. They should be **dropped and recreated** from the backup file if you want to revert to the backup schema.

#### ⚠️ `machines` (CRITICAL - Most Changes)

**Columns Removed in Dev (exist in backup):**
- `ipaddress1` - Removed (now in communications table)
- `ipaddress2` - Removed (now in communications table)

**Columns Added in Dev (not in backup):**
- `hostname` - For PC hostnames
- `serialnumber` - Equipment serial numbers
- `loggedinuser` - Current logged-in user (PCs)
- `pctypeid` - Identifies PCs (NULL = equipment, NOT NULL = PC)
- `osid` - Foreign key to operatingsystems (PC OS)
- `controllertypeid` - Foreign key to controllertypes
- `controllerosid` - Controller OS (for CNCs)
- `controllermodelid` - Controller model reference
- `machinestatusid` - Replaces pcstatusid
- `lastupdated` - Auto-updated timestamp
- `requires_manual_machine_config` - Configuration flag

**Impact:** This is the core table for Phase 2 migration. Reverting will break all PC and network device functionality.

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#### ⚠️ `businessunits`

**Columns Added in Dev (not in backup):**
- `liaisonname` - Liaison contact name
- `liaisonsso` - Liaison SSO
- `facility_id` - Facility identifier
- `dt_lead` - DT Lead name
- `dt_lead_sso` - DT Lead SSO

**Impact:** Minor. These are additional metadata fields that don't affect core functionality.

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#### ⚠️ `controllertypes`

**Columns Added in Dev (not in backup):**
- `vendorid` - Foreign key to vendors
- `controllermodel` - Controller model name
- `controller_os` - Controller OS name
- `controllernotes` - Additional notes

**Impact:** Minor. Enhanced metadata for CNC controllers.

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#### ⚠️ `machine_overrides`

**Issue:** Same columns but definition differences (likely data types or constraints changed)

**Impact:** Unknown without detailed field-by-field comparison.

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## New Tables in Dev (Phase 2 Migration)

These 8 tables exist in the current dev database but NOT in the backup file. They are **Phase 2 migration tables** and should be **preserved**.

### Phase 2 Tables (DO NOT DROP)

1. **`communications`** - Unified network interface storage (replaces pc_network_interfaces, printer IPs)
2. **`comstypes`** - Communication types (IP, Serial, USB, etc.)
3. **`compliance`** - Compliance tracking data
4. **`compliancescans`** - Compliance scan history
5. **`machinerelationships`** - Machine-to-machine relationships (dualpath, controls)
6. **`relationshiptypes`** - Relationship type definitions
7. **`machinestatus`** - Replaces pcstatus with broader scope
8. **`warranties`** - Warranty tracking

**These tables are critical for Phase 2 functionality and should NOT be dropped.**

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## Legacy Tables in Backup (Not in Dev)

These 41 tables exist in the backup file but NOT in the current dev database. Most are **deprecated** or **views**.

### Deprecated PC Tables (Replaced by machines + communications)

- `pc` - **DEPRECATED** → Replaced by machines WHERE pctypeid IS NOT NULL
- `pc_network_interfaces` - **DEPRECATED** → Replaced by communications
- `pc_comm_config` - **DEPRECATED** → Replaced by communications
- `pc_dnc_config` - **DEPRECATED** → Integrated into machine relationships
- `pc_dualpath_assignments` - **DEPRECATED** → Replaced by machinerelationships
- `pctype` - **DEPRECATED** → Now stored in machines.pctypeid
- `pcstatus` - **DEPRECATED** → Replaced by machinestatus

### Deprecated Network Device Tables (Replaced by machines)

- `accesspoints` - **DEPRECATED** → Replaced by machines WHERE machinetypeid = 16
- `cameras` - **DEPRECATED** → Replaced by machines WHERE machinetypeid = 18
- `switches` - **DEPRECATED** → Replaced by machines WHERE machinetypeid = 19
- `servers` - **DEPRECATED** → Replaced by machines WHERE machinetypeid = 20
- `idfs` - **DEPRECATED** → Replaced by machines WHERE machinetypeid = 17

### Legacy Relationship Table

- `machine_pc_relationships` - **DEPRECATED** → Replaced by machinerelationships

### Backup Table

- `pc_model_backup` - Backup table (can be dropped)

### Views (33 views)

All views with `vw_` prefix are query views, not base tables:

- `vw_active_pcs`
- `vw_dnc_config`
- `vw_dualpath_management`
- `vw_engineer_pcs`
- `vw_ge_machines`
- `vw_idf_inventory`
- `vw_infrastructure_summary`
- `vw_machine_assignments`
- `vw_machine_assignment_status`
- `vw_machinetype_comparison`
- `vw_machine_type_stats`
- `vw_multi_pc_machines`
- `vw_network_devices`
- `vw_pc_network_summary`
- `vw_pc_resolved_machines`
- `vw_pcs_by_hardware`
- `vw_pc_summary`
- `vw_pctype_config`
- `vw_recent_updates`
- `vw_shopfloor_applications_summary`
- `vw_shopfloor_comm_config`
- `vw_shopfloor_pcs`
- `vw_standard_pcs`
- `vw_unmapped_machines`
- `vw_vendor_summary`
- `vw_warranties_expiring`
- `vw_warranty_status`

**Note:** Views need to be recreated to match Phase 2 schema.

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## Recommendation: What to Drop and Recreate

### ⚠️ CRITICAL WARNING

**DO NOT apply the backup file schema if you want to keep Phase 2 functionality!**

The backup file represents the **OLD Phase 1 schema** before the major PC migration work completed on Nov 17, 2025. Applying it would:

1. ❌ Lose all Phase 2 migration work (20+ days of development)
2. ❌ Break all PC pages (displaypcs.asp, displaypc.asp, editpc.asp, etc.)
3. ❌ Break network device display (network_map.asp, network_devices.asp)
4. ❌ Lose unified communications table
5. ❌ Lose machine relationships functionality
6. ❌ Lose compliance tracking
7. ❌ Lose warranty management

### If You Must Revert to Backup Schema

**Tables to DROP and recreate from backup:**

1. ✅ `machines` - DROP and recreate (loses Phase 2 columns)
2. ✅ `businessunits` - DROP and recreate (loses liaison/facility fields)
3. ✅ `controllertypes` - DROP and recreate (loses enhanced metadata)
4. ✅ `machine_overrides` - DROP and recreate (definition changes)

**Tables to DROP from dev (Phase 2 tables):**

5. ❌ `communications` - DROP (then recreate from backup if needed)
6. ❌ `comstypes` - DROP
7. ❌ `compliance` - DROP
8. ❌ `compliancescans` - DROP
9. ❌ `machinerelationships` - DROP
10. ❌ `relationshiptypes` - DROP
11. ❌ `machinestatus` - DROP (will recreate `pcstatus` from backup)
12. ❌ `warranties` - DROP

**Tables to ADD from backup (legacy tables):**

13. ➕ `pc` - CREATE from backup
14. ➕ `pc_network_interfaces` - CREATE from backup
15. ➕ `pc_comm_config` - CREATE from backup
16. ➕ `pc_dnc_config` - CREATE from backup
17. ➕ `pc_dualpath_assignments` - CREATE from backup
18. ➕ `pctype` - CREATE from backup
19. ➕ `pcstatus` - CREATE from backup
20. ➕ `accesspoints` - CREATE from backup (if needed)
21. ➕ `cameras` - CREATE from backup (if needed)
22. ➕ `switches` - CREATE from backup (if needed)
23. ➕ `servers` - CREATE from backup (if needed)
24. ➕ `idfs` - CREATE from backup (if needed)
25. ➕ `machine_pc_relationships` - CREATE from backup

**Views to recreate (33 views):** All `vw_*` views need to be dropped and recreated from backup.

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## Recommended Action Plan

### Option 1: Keep Phase 2 Schema (RECOMMENDED)

**DO NOTHING.** Your current dev database is the latest Phase 2 schema with all improvements.

The backup file is outdated and should not be applied unless you need to revert Phase 2 changes.

### Option 2: Sync Backup File to Match Dev

If the backup file is supposed to be the "source of truth", then UPDATE the backup file to include Phase 2 schema:

1. Export current dev schema: `mysqldump shopdb > new-phase2-backup.sql`
2. Replace old backup file with Phase 2 schema
3. Use Phase 2 schema for future deployments

### Option 3: Revert to Backup Schema (NOT RECOMMENDED)

If you absolutely must revert to Phase 1 schema:

1. Backup current dev database (already done: dev-backup-20251120-105614.sql)
2. Drop Phase 2 tables: communications, compliance, machinerelationships, etc.
3. Restore machines, businessunits, controllertypes to backup versions
4. Restore all legacy tables (pc, pc_network_interfaces, etc.)
5. Recreate all views
6. **Accept that all Phase 2 functionality will be lost**

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## Table Count Summary

| Category | Backup File | Dev Database | Difference |
|----------|-------------|--------------|------------|
| **Total Tables** | 63 | 30 | -33 |
| **Base Tables** | 36 | 30 | -6 |
| **Views** | 27 | 0 | -27 |
| **Schema Changes** | - | 4 | - |
| **New in Dev** | - | 8 | +8 |
| **Missing in Dev** | 41 | - | - |

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## Files Generated

1. **Current Dev Backup:** `/home/camp/projects/windows/shopdb/sql/dev-backup-20251120-105614.sql` (464 KB)
2. **This Report:** `/home/camp/projects/windows/shopdb/SCHEMA_COMPARISON_REPORT_2025-11-20.md`

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## Conclusion

**The backup file (database-backup-11-20-25-eod-with-drop.sql) is from BEFORE Phase 2 migration.**

Your current dev database has the **Phase 2 schema** with significant improvements:
- ✅ Unified machines table for all infrastructure
- ✅ Consolidated communications table
- ✅ Machine relationships tracking
- ✅ Compliance management
- ✅ Warranty tracking

**Recommendation:** Do NOT apply the backup file schema. Keep your current Phase 2 dev schema.

If production needs updating, use your current dev schema as the source, not the backup file.

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**Generated:** 2025-11-20 10:56
**Analyst:** Claude Code
**Status:** Analysis Complete ✅