The following table provides a summary of indicator variable usage.
| Indicator value | Supplying value to database | Receiving value from database |
|---|---|---|
| > 0 | Host variable value | Retrieved value was truncated—actual length in indicator variable. |
| 0 | Host variable value | Fetch successful, or conversion_error set to On. |
| -1 | NULL value | NULL result. |
| -2 | NULL value | Conversion error (when conversion_error is set to Off only). SQLCODE indicates a CANNOT_CONVERT warning. |
| < -2 | NULL value | NULL result. |
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