Indexes, Columns and Rows in EM_LOG Tables

Indexes in EM logging tables include a:

• Primary key index on the joined timestamp and sequence number columns.
• Secondary key index on the joined timestamp_utc and sequence number columns.
• Secondary index on the timestamp alone.
• Secondary index on the timestamp_utc alone.

If you have selected the project name table attribute, the primary key index also includes the project name column.

The primary key includes an MSEC column, if milliseconds is enabled.

Columns and rows in EM logging tables are as follows.

Column Name	Data Type	Description
Constant fields
timestamp	date/time	Timestamp of the logging event.
timestamp_utc	date/time	UTC timestamp of the logging event.
sequence_number	number	Identity column to ensure uniqueness.
time	string	Local timestamp of the previous time the point was logged.
time_utc	string	UTC timestamp of the previous time the point was logged.
event_type	string	The type of Event Manager event associated with the event source.
event_source	string	Identifier that triggered the event.
action_type	string	The type of Event Manager action associated with the action source.
action_target	string	Identifier of the action's target.
Optional fields
project	string	Name of the CIMPLICITY project.
msec	number	Actual number of milliseconds in the timestamp.