JCL Utilities - IDCAMS

Code Example

## JCL Utilities - IDCAMS

IDCAMS (Access Method Services) manages VSAM and non-VSAM datasets - the Swiss Army knife of mainframe utilities.

### Common Commands
| Command | Purpose |
|---------|---------|
| DEFINE | Create datasets/objects |
| DELETE | Remove datasets |
| LISTCAT | Display catalog info |
| PRINT | Display dataset contents |
| REPRO | Copy datasets |
| ALTER | Modify attributes |
| VERIFY | Check/repair VSAM |

### DEFINE CLUSTER (VSAM)
\`\`\`
DEFINE CLUSTER (NAME(dsname) -
                VOLUMES(volser) -
                RECORDS(primary secondary) -
                KEYS(length offset) -
                INDEXED/NONINDEXED/NUMBERED)
\`\`\`

### REPRO (Copy)
\`\`\`
REPRO INFILE(ddname) -
      OUTFILE(ddname)
\`\`\`

### DELETE
\`\`\`
DELETE dsname CLUSTER/NONVSAM PURGE
\`\`\`

### Conditional Processing
\`\`\`
IF MAXCC = 0 THEN -
  DO
    commands...
  END
\`\`\`

### Return Codes
- 0: Success
- 4: Warning
- 8: Error
- 12: Severe
- 16: Terminating