iron_query::CaseBuilder Class Reference

Transitional representation for CASE WHEN ... END. More...

#include <case_builder.hpp>

Public Member Functions
	CaseBuilder ()=default
	Starts an empty CASE expression; call When to add branches.
CaseBuilder	When (Condition cond) &&
	Begins a new WHEN cond branch.
CaseBuilder	Then (Expr result) &&
	Completes the pending branch as WHEN cond THEN result.
CaseBuilder	Else (Expr result) &&
	Sets the ELSE result fallback branch.
Expr	End () const
	Finalizes the expression as CASE ... [ELSE ...] END.

Detailed Description

Transitional representation for CASE WHEN ... END.

See also

https://www.postgresql.org/docs/current/sql-expressions.html#SQL-EXPRESSIONS-CASE

Member Function Documentation

Else()

CaseBuilder iron_query::CaseBuilder::Else

(

Expr

result

)

&&

Sets the ELSE result fallback branch.

Note

Does not check that all Then/Else branches of the same CASE share a compatible result type.

End()

Expr iron_query::CaseBuilder::End

(

)

const

Finalizes the expression as CASE ... [ELSE ...] END.

Exceptions

LogicError

if no WHEN/THEN pair was added.

Then()

CaseBuilder iron_query::CaseBuilder::Then

(

Expr

result

)

&&

Completes the pending branch as WHEN cond THEN result.

Exceptions

LogicError

if not preceded by When.

Note

Does not check that all Then/Else branches of the same CASE share a compatible result type.

When()

CaseBuilder iron_query::CaseBuilder::When

(

Condition

cond

)

&&

Begins a new WHEN cond branch.

Exceptions

LogicError

if called twice in a row without a matching Then in between.

---

The documentation for this class was generated from the following file:

• include/iron_query/case_builder.hpp