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https://issues.apache.org/jira/browse/OLINGO-1087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15891966#comment-15891966
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Ralf Handl commented on OLINGO-1087:
------------------------------------
Because the database stores the scale per column, not per value. It has stored
the value "12" and knows from the column metadata that the decimal point is two
digits from the right, so the number is .12, or 0.12 with a padding zero added
for readability.
> Precision in EdmDecimal not calculated correctly
> ------------------------------------------------
>
> Key: OLINGO-1087
> URL: https://issues.apache.org/jira/browse/OLINGO-1087
> Project: Olingo
> Issue Type: Bug
> Components: odata2-core
> Affects Versions: V2 2.0.8
> Reporter: Svante von Erichsen
> Attachments: 0001-OLINGO-1087-Fix-calculation-of-precision.patch
>
>
> The "precision" found in a read number is currently at least the number of
> decimals (omitting trailing zeroes). That seems to be wrong, or at least not
> consistent with at least some server side view of the matter, for numbers
> smaller than 0.1 (the number shown has 35 decimals, but precision 34):
> org.apache.olingo.odata2.api.edm.EdmSimpleTypeException: The metadata
> constraints '[Precision=34]' do not match the literal
> '0.08102359900000000170194880411145277'.
> at
> org.apache.olingo.odata2.core.edm.EdmDecimal.internalValueOfString(EdmDecimal.java:107)
> at
> org.apache.olingo.odata2.core.edm.AbstractSimpleType.valueOfString(AbstractSimpleType.java:91)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonPropertyConsumer.readSimpleProperty(JsonPropertyConsumer.java:236)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonPropertyConsumer.readPropertyValue(JsonPropertyConsumer.java:169)
> ... 69 common frames omitted
> Wrapped by: org.apache.olingo.odata2.api.ep.EntityProviderException: An
> exception of type 'EdmSimpleTypeException' occurred.
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonPropertyConsumer.readPropertyValue(JsonPropertyConsumer.java:171)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonEntryConsumer.handleName(JsonEntryConsumer.java:172)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonEntryConsumer.readEntryContent(JsonEntryConsumer.java:130)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonEntryConsumer.readFeedEntry(JsonEntryConsumer.java:117)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonFeedConsumer.readArrayContent(JsonFeedConsumer.java:153)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonFeedConsumer.handleName(JsonFeedConsumer.java:122)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonFeedConsumer.readFeedContent(JsonFeedConsumer.java:111)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonFeedConsumer.readFeed(JsonFeedConsumer.java:96)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonFeedConsumer.readFeedStandalone(JsonFeedConsumer.java:63)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonEntityConsumer.readDeltaFeed(JsonEntityConsumer.java:95)
> at
> org.apache.olingo.odata2.core.ep.consumer.JsonEntityConsumer.readFeed(JsonEntityConsumer.java:81)
> at
> org.apache.olingo.odata2.core.ep.JsonEntityProvider.readFeed(JsonEntityProvider.java:309)
> at
> org.apache.olingo.odata2.core.ep.ProviderFacadeImpl.readFeed(ProviderFacadeImpl.java:165)
> at
> org.apache.olingo.odata2.api.ep.EntityProvider.readFeed(EntityProvider.java:676)
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