sqlQuery of DocumentDB input bindings with modulation symbol makes function's failure - azure

Question

I using the DocumentDB input bindings on Azure Functions.
Today, I specified a following query as a sqlQuery.
SELECT c.id, c.created_at FROM c
WHERE {epoch} - c.created_at_epoch >= 86400*31
AND (CEILING({epoch}/86400) - CEILING(c.created_at_epoch / 86400)) % 31 = 0
Afterwards, I saw a following error when function is triggered.
2017-07-04T10:31:44.873 Function started (Id=95a2ab7a-8eb8-4568-b314-2c3b04a0eadf)
2017-07-04T10:31:49.544 Function completed (Failure, Id=95a2ab7a-8eb8-4568-b314-2c3b04a0eadf, Duration=4681ms)
2017-07-04T10:31:50.106 Exception while executing function: Functions.Bonus. Microsoft.Azure.WebJobs.Host: The '%' at position 148 does not have a closing '%'.
I want to use a modulation symbol within sqlQuery. What can I?
Best regards.
2017-07-15(JST) Append.
And today, I tried following another query for avoid this issue.
SELECT c.id, c.created_at FROM c
WHERE {epoch} - c.created_at_epoch >= 86400*31 AND
(CEILING({epoch}/86400) - CEILING(c.created_at_epoch / 86400)) -
(31 *
CEILING(
(CEILING({epoch}/86400) - CEILING(c.created_at_epoch / 86400))
/ 31
)
) = 0
Just in case, I tried this query that is specified a epoch = 1499218423 on the Cosmos DB.
SELECT c.id, c.created_at FROM c
WHERE 1499218423 - c.created_at_epoch >= 86400*31 AND
(CEILING(1499218423/86400) - CEILING(c.created_at_epoch / 86400)) -
(31 *
CEILING(
(CEILING(1499218423/86400) - CEILING(c.created_at_epoch / 86400))
/ 31
)
) = 0
That's result is followings.
[
{
"id": "70251cbf-44b3-4cd9-991f-81127ad78bca",
"created_at": "2017-05-11 18:46:16"
},
{
"id": "0fa31de2-4832-49ea-a0c6-b517d64ede85",
"created_at": "2017-05-11 18:48:22"
},
{
"id": "b9959d15-92e7-41c3-8eff-718c4ab2be6e",
"created_at": "2017-05-11 19:01:43"
}
]
It looks fine. Then I specify it as sqlQuery and test with following queue data.
{"epoch":1499218423}
And code of the function is followings.
module.exports = function (context, myQueueItem) {
context.log(context.bindings.members, myQueueItem);
context.done();
};
Afetrwards, I saw following results.
2017-07-05T03:00:47.158 Function started (Id=e4d060b5-3ddc-4271-bf91-9f314e7e1148)
2017-07-05T03:00:47.408 [] { epoch: 1499871600 }
2017-07-05T03:00:47.408 Function completed (Success, Id=e4d060b5-3ddc-4271-bf91-9f314e7e1148, Duration=245ms)
It looks differences in results of bindings(as context.bindings.members).
Why appeared this differences?
Related question : Deferences among the Azure CosmosDB Query Explorer's results and the Azure Functions results

Answer 1

I want to use a modulation symbol within sqlQuery. What can I?
The modulation symbol(%) in Azure function configuration is used to retrieve values from app settings. For your issue, I suggest you add a item in app setting as following.
After that, you could use %modulationsymbol% instead of % in your query as following.
SELECT c.id, c.created_at FROM c
WHERE {epoch} - c.created_at_epoch >= 86400*31
AND (CEILING({epoch}/86400) - CEILING(c.created_at_epoch / 86400)) %modulationsymbol% 31 = 0