friendica-github/doc/database/db_mail.md

Table mail

private messages

Fields

Field	Description	Type	Null	Key	Default	Extra
id	sequential ID	int unsigned	NO	PRI	NULL	auto_increment
uid	Owner User id	mediumint unsigned	NO		0
guid	A unique identifier for this private message	varbinary(255)	NO
from-name	name of the sender	varchar(255)	NO
from-photo	contact photo link of the sender	varbinary(383)	NO
from-url	profile link of the sender	varbinary(383)	NO
contact-id	contact.id	varbinary(255)	YES		NULL
author-id	Link to the contact table with uid=0 of the author of the mail	int unsigned	YES		NULL
convid	conv.id	int unsigned	YES		NULL
title		varchar(255)	NO
body		mediumtext	YES		NULL
seen	if message visited it is 1	boolean	NO		0
reply		boolean	NO		0
replied		boolean	NO		0
unknown	if sender not in the contact table this is 1	boolean	NO		0
uri		varbinary(383)	NO
uri-id	Item-uri id of the related mail	int unsigned	YES		NULL
parent-uri		varbinary(383)	NO
parent-uri-id	Item-uri id of the parent of the related mail	int unsigned	YES		NULL
thr-parent		varbinary(383)	YES		NULL
thr-parent-id	Id of the item-uri table that contains the thread parent uri	int unsigned	YES		NULL
created	creation time of the private message	datetime	NO		0001-01-01 00:00:00

Indexes

Name	Fields
PRIMARY	id
uid_seen	uid, seen
convid	convid
uri	uri(64)
parent-uri	parent-uri(64)
contactid	contact-id(32)
author-id	author-id
uri-id	uri-id
parent-uri-id	parent-uri-id
thr-parent-id	thr-parent-id

Foreign Keys

Field	Target Table	Target Field
uid	user	uid
author-id	contact	id
uri-id	item-uri	id
parent-uri-id	item-uri	id
thr-parent-id	item-uri	id

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