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SQL programmingYou can use the HCL Informix® implementation of the SQL language to develop applications for Informix® database servers.
Guide to SQL: TutorialThe Informix® Guide to SQL: Tutorial shows how to use basic and advanced structured query language (SQL) to access and manipulate the data in your databases. It discusses the data manipulation language (DML) statements as well as triggers and stored procedure language (SPL) routines, which DML statements often use.
Modify data
Data integrity
Object modes and violation detection
Definitions of object modes
Disabled mode

Disabled mode

When a database object is disabled, the database server does not take it into consideration during the execution of an INSERT, DELETE, or UPDATE statement. A disabled constraint is not enforced, a disabled index is not updated, and a disabled trigger is not executed when the trigger event takes place. When you disable constraints and unique indexes, any data manipulation statement that violates the restriction of the constraint or unique index succeed, (that is, the target row is changed), and the database server does not return an error message.

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