Sybase 12.5.1, Руководство пользователя

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APPENDIX C Specifications for Defining Playback Views
User’s Guide
163
Playback views are derived from the input views. The name of a playback view
must match the name of a view in the input sessions. In the case of multiple
input sessions, the view must exist in all of the input sessions, and the view
definitions in all of the input sessions must contain exactly the same list of data
items and the same list of filters.
Rules for defining views
The rules for defining playback views are different depending on whether the
summarization_interval defined for the playback session is
raw
or non-
raw
.
Rules for defining raw playback views
When the summarization_interval for the playback session is
raw
:
• All key data items in the input view must be included in the playback view.
The column labeled “Key” in Table C-2 indicates which data items are
keys. The only valid statistic type for a key is “Value for Sample.”
• The result data items in the input view are optional in the playback view.
• The statistic types for all data items in the playback view must be the same
as those used for the input view.
• Any playback view can include these data items:
“Timestamp” “Value for Sample”
“Timestamp Datim” “Value for Sample”
“Elapsed Time” “Value for Sample”
“Elapsed Time” “Value for Session”
If you want to play back all data items in the input view and do not need to add
Timestamp, use the
hs_create_playback_view
command without the
data_item_name_n and data_item_stat_n parameters. The default when you
omit these parameters is to define the playback view using all of the data items
from the input view of the same name.
Rules for defining non-raw playback views
When summarization_interval is
entire
,
actual
, or a summary interval:
• All key data items in the input view must be included in the playback view.
The column labeled “Key” in Table C-2 on page 165 indicates which data
items are keys. The only valid statistic type for keys is “Value for Sample”.