Search conditions (
<The search conditions that the Optimizer can use to determine the optimal search strategy are the following:
If the search conditions in an SQL statement cannot be converted into one of the forms listed above, they cannot be used when selecting a search strategy.
The order of search conditions that are linked by equal Boolean operators has no influence on the selection of a search strategy.
If you use UPDATE statements, you can only use the search conditions with restrictions (
Search Conditions for UPDATE Statements).