Catch clause
A catch clause is an exception-handling construct that executes a handler when an associated operation raises a matching exception or error.
100 SQL Server Mistakes and How to Avoid Them
TRY..CATCH is T-SQL control-flow syntax that executes protected code in a TRY block and transfers control to a CATCH block when a catchable error occurs.
- How it is used
- Traps stored-procedure errors so transactions can be recovered and failures can be reported or logged meaningfully.
- How deep it goes
- Explains control transfer from TRY to CATCH and applies it to transaction rollback, custom errors, and logging.
- Examples
- Uses InsertSalesOrder failures, including missing tables, foreign-key violations, and duplicate sales-order keys.
- What you can do after
- Apply it via T-SQL to trap failures, roll back transactions, log details, and raise clearer errors.
Read how 100 SQL Server Mistakes and How to Avoid Them explains catch clause →
Elixir in Action, Third Edition
A catch clause is a clause of a try expression that pattern-matches and handles an error, exit, or throw.
- How it is used
- Handles runtime errors, exits, and throws within try expressions.
- How deep it goes
- Explains syntax, event types, pattern matching, return values, and cleanup, but stops short of broader fault-tolerance architecture.
- Examples
- Uses a helper lambda, raised errors, thrown values, exits, tuple-pattern catches, and cleanup output.
- What you can do after
- Apply it via Elixir try expressions to classify, selectively handle, and return values from runtime events.
Read how Elixir in Action, Third Edition explains catch clause →
Related concepts
- try-catch statementpart of · A try-catch statement is a control-flow construct that executes code under exception handling and transfers control to a matching handler when an exception is raised.
- exceptionused by · An exception is a runtime signal or object representing an abnormal condition that interrupts ordinary program flow and may be handled or propagated.
- error handlingimplements · Error handling is the practice of detecting, representing, propagating, reporting, and responding to errors or failures during software operation.
- finallyincludes · A finally clause is an exception-handling block that runs when control leaves an associated protected block, whether normally or exceptionally.
- return statementhas part · A return statement ends the current function or routine invocation and optionally supplies its result to the caller.
- global error handlercontrasts with · A global error handler is a runtime-level mechanism that receives or reports errors escaping local error-handling mechanisms.
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