Generates the optimizer query plans instead of executing the plan.
Option can be set at the database (PUBLIC) or user level. When set at the database level, the value becomes the default for any new user, but has no impact on existing users. When set at the user level, overrides the PUBLIC value for that user only. No system privilege is required to set option for self. System privilege is required to set at database level or at user level for any user other than self.
Requires the SET ANY PUBLIC OPTION system privilege to set this option. Can be set temporary for an individual connection or for the PUBLIC role. Takes effect immediately.
When determining how to process a query, the IQ optimizer generates a query plan to map how it plans to have the query engine process the query. If this option is set ON, the optimizer sends the plan for the query to the IQ message file rather than submitting it to the query engine. NOEXEC affects queries and commands that include a query.
Setting NOEXEC ON also prevents the execution of INSERT...VALUES, INSERT...SELECT, INSERT...LOCATION, SELECT...INTO, LOAD TABLE, UPDATE, TRUNCATE TABLE, DELETE, and updatable cursor operations.
When the EARLY_PREDICATE_EXECUTION option is ON, SAP Sybase IQ executes the local predicates for all queries before generating a query plan, even when the NOEXEC option is ON. The generated query plan is the same as the runtime plan.