BlobObject_change

This is an entity to record changes in the BlobObject structure. It holds records that are already prepared for sending out via the market data streams (for example resolving internal shared memory indexes into external foreign key Ids)

Metadata

  • Base Table Class: Change
  • Not in MDB
  • Default Size: User * Constants::MaxBlobsPerUser * Constants::MaxChangesPerBlob = 5000

Fields

NameTypeSize (bytes)Description
IdInteger (signed)8The unique identifier of this BlobObject.
StatusSet of Status4
TimestampInteger (unsigned)8The time at which this change record was generated. This is not the same as the business-level timestamp of this BlobObject_change.
NameString48The long text identifier of this BlobObject_change.
VersionInteger (unsigned)4
ObjectTypeString24The short text identifier of this BlobObject_change.
BlobString10240
OwnerUserForeign key to User8
OwnerGroupForeign key to Group8
OwnerFirmForeign key to Firm8
UpdateNumberInteger (unsigned)8A number that records every change that happens to a record. It is primarily used to avoid write after read problems when an intermediate write has changed the originally read record.
BCSequenceInteger (unsigned)8The sequence number of this BlobObject_change message in the overall broadcast sequence.
ReloadedInteger (unsigned)1Set to true for change records that are generated during a normal startup from engine cache files.
InstanceIdInteger (unsigned)4
RunIdInteger (unsigned)4
ChangedFieldOne of KVPKey4
CreateUserForeign key to User8The Id of the User that created this BlobObject.
CreateTimestampInteger (unsigned)8The time at which this BlobObject was created.
UpdateUserForeign key to User8The Id of the User that last updated this BlobObject.
UpdateTimestampInteger (unsigned)8The time at which this BlobObject was last updated.
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