# Using an IBM Db2 for z/OS database as a source in DMS Schema Conversion
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You can use an IBM Db2 for z/OS databases as a migration source in DMS Schema Conversion.

You can use DMS Schema Conversion to convert database code objects from Db2 for z/OS Database to the following targets: 
+ Amazon RDS for Db2
+ Amazon RDS for PostgreSQL
+ Aurora PostgreSQL

For more information regarding the supported IBM Db2 for z/OS database versions, see [Source data providers for DMS Schema Conversion](https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Introduction.Sources.html#CHAP_Introduction.Sources.SchemaConversion).

## Prerequisites for IBM Db2 for z/OS as a source database
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The IBM Db2 for z/OS version 12 function level 100 database version does not support most new capabilities of IBM Db2 for z/OS version 12. This database version provides support for fallback to Db2 version 11 and data sharing with Db2 version 11. To avoid the conversion of unsupported features of Db2 version 11, we recommend that you use an IBM Db2 for z/OS database function level 500 or higher as a source for AWS DMS SC.

You can use the following code example to check the version of your source IBM Db2 for z/OS database:

```
SELECT GETVARIABLE('SYSIBM.VERSION') as version FROM SYSIBM.SYSDUMMY1;
```

Ensure that this code returns version `DSN12015` or higher.

You can use the following code example to check the value of the `APPLICATION COMPATIBILITY` special register in your source IBM Db2 for z/OS database:

```
SELECT CURRENT APPLICATION COMPATIBILITY as version FROM SYSIBM.SYSDUMMY1;
```

Ensure that this code returns version `V12R1M500` or higher.

## Privileges for IBM Db2 for z/OS as a source database
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The privileges needed to connect to a Db2 for z/OS database and read system catalogs and tables are as follows:

```
SELECT ON SYSIBM.LOCATIONS
SELECT ON SYSIBM.SYSCHECKS
SELECT ON SYSIBM.SYSCOLUMNS
SELECT ON SYSIBM.SYSDATABASE
SELECT ON SYSIBM.SYSDATATYPES
SELECT ON SYSIBM.SYSDUMMY1
SELECT ON SYSIBM.SYSFOREIGNKEYS
SELECT ON SYSIBM.SYSINDEXES
SELECT ON SYSIBM.SYSKEYCOLUSE
SELECT ON SYSIBM.SYSKEYS
SELECT ON SYSIBM.SYSKEYTARGETS
SELECT ON SYSIBM.SYSJAROBJECTS
SELECT ON SYSIBM.SYSPACKAGE
SELECT ON SYSIBM.SYSPARMS
SELECT ON SYSIBM.SYSRELS
SELECT ON SYSIBM.SYSROUTINES
SELECT ON SYSIBM.SYSSEQUENCES
SELECT ON SYSIBM.SYSSEQUENCESDEP
SELECT ON SYSIBM.SYSSYNONYMS
SELECT ON SYSIBM.SYSTABCONST
SELECT ON SYSIBM.SYSTABLES
SELECT ON SYSIBM.SYSTABLESPACE
SELECT ON SYSIBM.SYSTRIGGERS
SELECT ON SYSIBM.SYSVARIABLES
SELECT ON SYSIBM.SYSVIEWS
```