UI validation error when inputting integer expression into RDS parameter

Question

I am editing RDS postgres parameters. This is a valid integer expression: {DBInstanceClassMemory/32768} 
but I get the UI error that it's not a supported integer expression, and can't save it. I must enter a literal integer...
This is the same value that is present by default! As soon as I edit anything in the string, it throws an error, even after reverting the edit. ![error](/media/postImages/original/IMeVf40mxFTeqY9c44YGZlrg)

Answer

Hello.

Instead of entering it directly, you can select the parameter you want to change and click "Set to default value" in the upper right to return it to the default value.  
![a](/media/postImages/original/IMSORhZgxASMKb2h2iInXSaw)

I think that the calculation formula is probably designed so that if you change it from the default, you will not be able to enter it.

UI validation error when inputting integer expression into RDS parameter

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