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Formatting rules for double => varchar assignment


Hi MariaDB Developers,

I have an application which depends on the formatting MariaDB applies to a
double when assigned to a char/varchar column of different lengths, and am
trying to reproduce the behaviour in PHP. I have gotten some way but just
can't seem to get the rules right.

I'm having trouble finding a specification for this in the docs or the code
that is responsible for this in the MariaDB source. Can someone point me in
the right direction?


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