iron_query::Update Class Reference

Transitional representation for UPDATE query. More...

#include <update.hpp>

Public Member Functions
	Update (const Table &tbl)
	Starts an UPDATE tbl query.
Update	Set (const Expr &column, const Expr &value) &&
	Adds a column = value assignment to the SET clause.
Update	From (const VirtualTable &tbl) &&
	Sets the FROM clause, so SET/WHERE expressions may reference columns of tbl. tbl may be a table, a join, or anything VirtualTable::As has aliased.
Update	Where (Condition exp) &&
	Sets the WHERE clause.
Update	Returning (SelectItem item) &&
	Sets the RETURNING clause to a single entry.
Update	Returning (std::initializer_list< SelectItem > items) &&
	Sets the RETURNING clause to a comma-separated list of entries.
std::string	ToString () const

Detailed Description

Transitional representation for UPDATE query.

See also

https://www.postgresql.org/docs/current/sql-update.html

Member Function Documentation

From()

Update iron_query::Update::From

(

const VirtualTable &

tbl

)

&&

Sets the FROM clause, so SET/WHERE expressions may reference columns of tbl. tbl may be a table, a join, or anything VirtualTable::As has aliased.

Exceptions

LogicError

if tbl is a subquery without an alias, or if the FROM clause was already set.

Returning() [1/2]

Update iron_query::Update::Returning

(

SelectItem

item

)

&&

Sets the RETURNING clause to a single entry.

Exceptions

LogicError

if the RETURNING clause was already set.

Returning() [2/2]

Update iron_query::Update::Returning

(

std::initializer_list< SelectItem >

items

)

&&

Sets the RETURNING clause to a comma-separated list of entries.

Exceptions

LogicError

if the RETURNING clause was already set.

Set()

Update iron_query::Update::Set	(	const Expr &	column,
		const Expr &	value
	)		&&

Adds a column = value assignment to the SET clause.

Note

Does not check that column names an actual column of tbl, nor that value's type matches that column's declared type.

ToString()

std::string iron_query::Update::ToString

(

)

const

Exceptions

LogicError

if no SET assignment was added.

Where()

Update iron_query::Update::Where

(

Condition

exp

)

&&

Sets the WHERE clause.

Exceptions

LogicError

if the WHERE clause was already set.

---

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

• include/iron_query/update.hpp