Migrating data from InterSystems Cache to PostgreSQL
This guide walks you through migrating data from InterSystems Cache to PostgreSQL in a few simple steps using ESF Database Migration Toolkit. Simplify complex migration tasks and save valuable time with our streamlined approach.Prerequisite:
Software Required:
ESF Database Migration Toolkit »System Supported:
- Windows 7 or higher.
- InterSystems Cache 2015.1 or higher.
- PostgreSQL 7.x or higher.
Step by Step Wizard:
-
Connect to InterSystems Cache
- In the "Choose a Data Source" dialog:
- Select "InterSystems Cache"
- Enter connection parameters:
- Server name:
localhost(default) - Port number:
1972(default)
- Server name:
- Provide authentication:
- Username:
_system(default) - Password associated with the account
- Username:
- Load database options:
- Click the Refresh Database button
- Select target database from the list
- Load schema options:
- Click the Refresh Schema button
- Choose desired schema
Fig. 1: InterSystems Cache data source configuration - In the "Choose a Data Source" dialog:
-
Configure PostgreSQL Destination
- In the "Choose a Destination" dialog:
- Select "PostgreSQL"
- Enter server connection details:
- Server name:
localhost(default) - Port:
5432(default)
- Server name:
- Provide authentication credentials:
- Username:
postgres(default) - Associated password
- Username:
- Configure character encoding:
- Select database character set (default:
UTF8) - Required for non-ASCII characters (e.g., German, French, Japanese)
- Select database character set (default:
- Database selection/creation:
- Select existing database or enter new database name
- Click the Refresh button to list available databases
- New databases are automatically created during migration
- Schema configuration:
- Enter or select target schema name (default:
public) - Click the Refresh Schema button to list available schemas
- Enter or select target schema name (default:
Fig. 2: PostgreSQL destination configuration - In the "Choose a Destination" dialog:
-
In "Select Source Table(s) & View(s)" Dialog
-
Select migration objects: Choose tables or views to include in the migration.
Fig. 3: Select tables and views -
Modify table structure: Click the ellipsis (...) button to access table options and schema adjustments.
Fig. 4: Do transform -
Configure field mapping: In the Field Mapping options:
- Customize destination fields (name, data type, default value, comments)
- Select data transfer method:
- Overwrite Table (replace existing data)
- Empty Data (truncate before insert)
- Append Data (add to existing data)
- Skip Table (exclude from transfer)
- Apply data filters before transfer
-
Select migration objects: Choose tables or views to include in the migration.
-
Execution Dialog
-
Start migration: Click "Submit" to initiate automated data transfer from InterSystems Cache to PostgreSQL.
Fig. 5: Execute migration - Monitor progress: Click "Browse Log" for real-time migration tracking, including issue resolution details.
-
Save configuration: Click "Save as job" to store settings for:
- Quick reloads of migration jobs
- Command-line execution (use:
dmtc.exe --helpfor parameter options)
-
Start migration: Click "Submit" to initiate automated data transfer from InterSystems Cache to PostgreSQL.
-
Finished!
After migration completes, the toolkit generates a comprehensive report for verifying migration accuracy. You can monitor progress as the automated process runs efficiently. For any questions or feedback, contact us – our team is ready to assist.