Retrive records using ODATA with SQL functions

Question

Hi,
I want to use SQL functions (for instance replace function) while retrieving records using ODATA endpoint using javascript. Like this:
parent.SDK.REST.retrieveMultipleRecords(
"$select=AccountId,Name,Telephone1&$filter=" + "replace(Telephone1,'-','') eq '12345678'",
function (accountresults) {
errorHandler,
function () {
But this is ending up with 404 bad request. Is there any way to achieve the same using any other technique?
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Answer 1

ODATA only supports simple comparison operators, and startswith, endswith and substringof. There are 2 approaches you could use without modifying the data:
Have a less selective filter in ODATA, then filter the rest of the data in javascript. In this example, you could use ODATA to find all records where the telephone1 field has each of '1', '2', '3' etc, then use javascript to do the replace comparison. It
depends how many records you have as to whether this is practical
Write a plugin on RetrieveMultiple that applies the functions you want. This is not necessarily simple, and you'd need to determine how you identify in the query that you want to use a function like replace
Another option could be to use a plugin when data is saved to strip out the characters you don't want, and store the results in a different field that you could then query on
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