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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™.
DELETE statementUse the DELETE statement to delete one or more rows from a table, or to delete one or more elements from a collection variable of SPL or of .
Considerations When Tables Have Cascading Deletes
Locking and Logging Implications of Cascading Deletes

Locking and Logging Implications of Cascading Deletes

During deletes, the database server places locks on all qualifying rows of the referenced and referencing tables.

HCL OneDB™ requires transaction logging for cascading deletes. If logging is turned off in a database that is not ANSI-compliant, even temporarily, deletes do not cascade, because you cannot roll back any actions. For example, if a parent row is deleted, but the system fails before the child rows are deleted, the database will have dangling child records, in violation of referential integrity. After logging is turned back on, however, subsequent deletes cascade.

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