Can I use realtime dynamic database in asterisk only for sip and not for extensions?

My requirement is, I have dynamic users (soft clients) registering to my sip server. I want to register them and clients should be able to make the call.

In /etc/asterisk

extconfig.conf

[settings]
sippeers => mysql,general,ast_sipfriends
res_mysql.conf

[general]
dbhost = 127.0.0.1
dbname = asterisk
dbuser = root
dbpass = <mySQL_DB_Password>
dbport = 3306
requirements = warn
res_odbc.conf

[asterisk]
enabled => yes
dsn => asterisk-connector
username => asterisk
password => <mySQL_DB_Password>
pooling => no
limit => 1
pre-connect => yes
sip.conf

[general]
register=>user:secret@sip.nexmo.com
;registerattempts=0
srvlookup=yes
context=nexmo-sip1
live_dangerously=yes
;nat=force_rport,comedia
;qualify=yes
;nat=no
externip=
localnet=10.0.0.0/255.0.0.0
localnet=192.168.0.0/255.255.0.0
;canreinvite=no
;sipreinvite=no
rtcachefriends=yes

[nexmo-sip]

fromdomain=sip.nexmo.com
type=friend
context=nexmo-sip1
insecure=port,invite
nat=no
;nat=yes
;nat=force_rport,comedia
allow=ulaw
allow=alaw
allow=G729
dtmf=rfc2833

[1001]
type=friend
context=nexmo-sip2
host=dynamic
secret=1001
qualify=yes
;nat=force_rport,comedia
User 1002 is inserted in ast_sipfriends table in asterisk database in mysql

Following output would be confusing to read, so here is the insert statement

insert into asterisk.ast_sipfriends (id,name,callerid,secret,context,host,qualify,type,disallow,allow) values (‘894’,‘1002’,‘1002’,‘1002’,‘nexmo-sip2’,‘dynamic’,‘yes’,‘friend’,‘all’,‘ulaw;alaw’);

±----±------------±------------±------------±---------±------------±--------±------------±-----------±---------±----------±------------±----------±---------±---------±-----------±------------±--------±---------±---------±----------±----±-----±-------±-----±------------±-----±--------±------------±-----------±---------------±-------±---------±----------±------------±-----------±-------±---------------±-------±----------±----------+
| id | name | callerid | defaultuser | regexten | secret | mailbox | accountcode | context | amaflags | callgroup | canreinvite | defaultip | dtmfmode | fromuser | fromdomain | fullcontact | host | insecure | language | md5secret | nat | deny | permit | mask | pickupgroup | port | qualify | restrictcid | rtptimeout | rtpholdtimeout | type | disallow | allow | musiconhold | regseconds | ipaddr | cancallforward | lastms | useragent | regserver |
±----±------------±------------±------------±---------±------------±--------±------------±-----------±---------±----------±------------±----------±---------±---------±-----------±------------±--------±---------±---------±----------±----±-----±-------±-----±------------±-----±--------±------------±-----------±---------------±-------±---------±----------±------------±-----------±-------±---------------±-------±----------±----------+
| 894 | 1002 | 1002 | | | 1002 | NULL | NULL | nexmo-sip2 | NULL | NULL | yes | NULL | NULL | NULL | NULL | NULL | dynamic | NULL | NULL | NULL | no | NULL | NULL | NULL | NULL | | yes | NULL | NULL | NULL | friend | all | ulaw;alaw | NULL | 0 | | yes | 0 | NULL | NULL |
±----±------------±------------±------------±---------±------------±--------±------------±-----------±---------±----------±------------±----------±---------±---------±-----------±------------±--------±---------±---------±----------±----±-----±-------±-----±------------±-----±--------±------------±-----------±---------------±-------±---------±----------±------------±-----------±-------±---------------±-------±----------±----------+
1 row in set (0.00 sec)
In extensions.conf

[general]
;live_dangerously=yes
[globals]

;outbound
[nexmo-sip2]
exten => _X.,1,Dial(SIP/${EXTEN}@nexmo)

[nexmo-sip1]
exten => _X.,1,Dial(SIP/${EXTEN},30)
In /etc

odbc.ini

[asterisk-connector]
Description = MySQL connection to ‘asterisk’ database
Driver = MySQL
Database = asterisk
Server = localhost
UID = asterisk
Password = <mySQL_DB_Password>
Port = 3306
Socket = /var/run/mysqld/mysqld.sock
odbcinst.ini

[MySQL]
Description = ODBC for MySQL
Driver = /usr/lib/x86_64-linux-gnu/odbc/libmyodbc.so
Setup = /usr/lib/x86_64-linux-gnu/odbc/libodbcmyS.so
FileUsage = 1
Issues: a) I get this warning

WARNING[1341]: res_config_mysql.c:335 realtime_mysql: MySQL RealTime: Invalid database specified: general (check res_mysql.conf)
How to fix this?

b) I get this notice when I try to connect 1002 from softclient, which I have inserted in ast_sipfriends

NOTICE[1341]: chan_sip.c:28446 handle_request_register: Registration from ‘sip:1002@mySeverIPAddress’ failed for ‘<myWifiUsedBY_SoftClient>:5060’ - Wrong password
How to fix this?

c) Is it possible to set up asterisk server real time dynamic SIP registration, but not for extensions?

Please help me. Thanks.

Post what you have in res_mysql.conf. The 1002 doesn’t have a secret.