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Client APIs and toolsYou can use the HCL OneDB™ implementation of client APIs to develop applications for HCL OneDB™ database servers.
Change Data Capture API Programmer's GuideThese topics describe how to program applications to process changed data from HCL OneDB™ databases using the HCL® OneDB® Change Data Capture API.The HCL OneDB™ Change Data Capture API Programmer's Guide describes how to program applications to process changed data from HCL OneDB™ databases using the HCL® OneDB® Change Data Capture API.
Change Data Capture recordsThe Change Data Capture (CDC) records are returned by smart large object read functions and contain the captured data and information about the transaction currently being captured.
The CDC_REC_BEGINTX recordIndicates the beginning of a transaction.

The CDC_REC_BEGINTX record

Indicates the beginning of a transaction.

The header for the CDC_REC_BEGINTX record follows the common header. No data follows the headers; the payload size in the common header is 0.

Table 1. Format of the CDC_REC_BEGINTX record
Section	Size	Description
Sequence number	8 bytes	The sequence number of the record.
Transaction ID	4 bytes	The transaction ID.
Start time	8 bytes	The UTC time at which the transaction began, in time_t format.
User ID	4 bytes	The operating system user ID of the user who started the transaction.