String conversion

The PostgreSQL server accepts and represents data in string form. It has its own formats for various data types. The string conversions define how various C++ types translate to and from their respective PostgreSQL text representations. More...

The PostgreSQL server accepts and represents data in string form. It has its own formats for various data types. The string conversions define how various C++ types translate to and from their respective PostgreSQL text representations.

Each conversion is defined by a specialisation of the `string_traits` template. This template implements some basic functions to support the conversion, ideally in both directions.

If you need to convert a type which is not supported out of the box, define your own `string_traits` specialisation for that type, similar to the ones defined here. Any conversion code which "sees" your specialisation will now support your conversion. In particular, you'll be able to read result fields into a variable of the new type.

There is a macro to help you define conversions for individual enumeration types. The conversion will represent enumeration values as numeric strings.