Performance Tuning Guide - EMC Community Network

Designing the Application
Figure 16. Specifying search criteria
The condition you select defines the syntax of a corresponding search query built by Forms Builder.
The following table describes available conditions and indicates the resulting syntax for an example
query:
Table 2. Search criteria conditions
Condition Description Example
Equals
Not equals
Like
Not like
Starts with
Ends with
Returns items that match the specified
value exactly.
Returns items that do not match the
specified value exactly.
Returns items that match a pattern
with a wildcard.
Returns items that do not match a
pattern with a wildcard.
Returns items in which the first part of
the item matches the specified value.
Returns items in which the last part of
the item matches the specified value.
object_name = ’$object_name$’
object_name ’$object_name$’
object_name LIKE ’%$object_name$%’
object_name NOT LIKE
’$object_name$’
object_name LIKE ’$object_name$%’
object_name LIKE ’%$object_name$’
Exact searches scale much better than wildcard searches. Wildcard searches involve scanning of
a full-text index or database table which affects performance, especially with larger repositories
containing many objects. Avoid using the Like, Not like, Starts with, and Ends with conditions.
44 EMC Documentum xCP 1.0 Performance Tuning Guide