LIKE conditions are search conditions with a LIKE predicate, to which the following applies:
· The operator is the operator LIKE.
·
LIKE
conditions have the following format:
<column_spec>
LIKE <extended_value_spec>
· The value specification used (extended_value_spec) may not begin with the SQL syntax elements match_string or match_set.
To determine an optimal search strategy, the Optimizer can only use LIKE conditions that satisfy these prerequisites.
Conditions with the format ...NOT (<column_spec> NOT LIKE <extended_value_spec>) are, where possible, converted into an expression <column_spec> LIKE <extended_value_spec>. The Optimizer then continues to process this modified condition.