如何在IICS中将所有目标转换字段的NULL值统一替换为*字符？

Great question—this is a common pain point when moving from PowerCenter to IICS, since the UI and configuration locations shift a bit. The good news is IICS does support global NULL replacement for all fields (just like PowerCenter's table-level setting), but you might have been looking in the wrong place earlier.

Here's how to set it up correctly: #

1. For Relational Database Targets (Oracle, SQL Server, Snowflake, etc.)

The global NULL replacement setting lives in the target object's table-level properties, not inside a transformation like Expression. Here's the step-by-step:

• Open your Mapping in IICS Data Integration.
• Double-click the target object to open its configuration panel.
• Navigate to the Advanced Properties tab (or sometimes labeled "Table Properties" depending on your IICS version).
• Look for the property named Replace Null With (older versions might call it Null Replacement Character).
• Enter * as the value and save the target configuration.
• Reactivate your Mapping and associated Integration Task to apply the changes.

This setting will automatically replace NULL values in all fields of the target table with *—no need to write 100+ individual expressions.

2. For Flat File Targets

If your target is a flat file, the setup is similar but located in the format settings:

• Open the flat file target's configuration.
• Go to the Format Settings tab.
• Find the Null Value field under the "General" section.
• Input * here, save, and reactivate your assets.

Why your earlier Replacement Character setting didn't work #

That option is likely part of a transformation (like a Flat File Source/Reader) or a field-level setting, not the global table-level replacement you need. It's easy to mix up these options since IICS has multiple places for similar configurations.

Important Notes #

• Ensure all target fields are character-based (VARCHAR, STRING, etc.). If you have numeric fields, replacing NULL with * will cause data type errors—you'll need to cast those fields to string first (you can do this with a single Expression transformation using TO_CHAR() for all numeric fields, or use a dynamic mapping if you have many fields).
• Always reactivate your Mapping and Integration Task after changing target properties—changes won't take effect until you do this.
• For real-time/CDC tasks, you'll need to stop and restart the task to apply the new configuration.

内容的提问来源于stack exchange，提问作者Teja Goud Kandula