Hello,

I couldn't find that somebody already mentioned it.

PostgreSQL isn't supporting CHAR(0).

An empty string has a length of 0.

CHAR(0) can have two values: NULL and empty string.

In MySQL it is very common to simulate not null boolean
by using CHAR(0).

This is a little bit annoying on migration topics.

Susanne

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Susanne Ebrecht - 2ndQuadrant
PostgreSQL Development, 24x7 Support, Training and Services
www.2ndQuadrant.com


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