Indicates whether a specified field is nullable.
If the field is nullable, returns TIBAS_TRUE. If the field is not nullable, returns TIBAS_FALSE.
Declaration
tibas_boolean tibasFieldDef_IsNullable
(tibasFieldDef fieldDef)
Parameters
| Parameter |
Description |
| fieldDef |
Specifies the FieldDef for the field whose nullable attribute is to be queried. |
Remarks
Use the tibasFieldDef_IsNullable() function to determine whether a specified field is nullable. Fields marked as nullable do not need to be assigned values, but if a value is assigned, the data type must match or be able to be upcasted.
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