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SQL programmingYou can use the HCL OneDB™ implementation of the SQL language to develop applications for HCL OneDB™ database servers.
Guide to SQL: SyntaxThe HCL OneDB™ Guide to SQL: Syntax describes the syntax of the statements, data types, expressions, operators, and built-in functions of the HCL OneDB™ dialect of the SQL language.
SQL statementsThis chapter describes the syntax and semantics of SQL statements that are recognized by HCL OneDB™.
SET Transaction Mode statementUse the SET Transaction Mode statement to specify whether constraints are checked at the statement level or at the transaction level during the current transaction.
Transaction-Level Checking

Transaction-Level Checking

When you set the transaction mode of constraints to DEFERRED, statement-level checking is turned off, and all (or the specified) constraints are not checked until the transaction is committed. If a constraint violation occurs while the transaction is being committed, the transaction is rolled back.

Tip: If you defer checking a primary-key constraint, checking the not-NULL constraint for that column or set of columns is also deferred.

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