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SdaiBoolean edmiIsVolatileInstance (SdaiAppInstance currInst);
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Checks if the specified instance is a volatile instance. Volatile instances are created by the EDMexpressVM as result of reading a Derive attribute, invoking an EDMquery function or running other "programs" in EDMexpressVM.
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Volatile instances are never persistent in an EDMdatabase.
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In this operation an instance means both entity instance and aggregate instance.
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Arguments
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| Type | Name | Comment |
| SdaiAppInstance | currInst | Specifies a numeric instanceID that uniquely identifies an application instance in the EDMdatabase. |
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Return Value
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| Type | Comment |
| SdaiBoolean | sdaiTRUE when the instance is a volatile one, otherwise sdaiFALSE. |
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Options
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Example
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SdaiAppInstance currInst; SdaiBoolean isVolatile; . . . isVolatile = edmiIsVolatileInstance(currInst); |
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if (isVolatile == sdaiTRUE) { |
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printf("\nInstance: %lu is a volatile instance", currInst); |
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} else { |
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printf("\nInstance: %lu is not a volatile instance", currInst); |
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}
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See also
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