mysqldump - Export structure only without autoincrement

Question

I have a MySQL database and I am trying to find a way to export its structure only, without the auto increment values. mysqldump --no-data would almost do the job, but it keeps the auto_increment values. Is there any way to do it without using PHPMyAdmin (that I know it can do it)?

Solution 1

You can do this :

mysqldump -u root -p -h <db-host> --opt <db-name> -d --single-transaction | sed 's/ AUTO_INCREMENT=[0-9]*\b//' > <filename>.sql

As mentioned by others, If you want sed to works properly, add the g (for global replacement) parameter like this :

mysqldump -u root -p -h <db-host> --opt <db-name> -d --single-transaction | sed 's/ AUTO_INCREMENT=[0-9]*\b//g' > <filename>.sql

(this only works if you have GUI Tools installed: mysqldump --skip-auto-increment)

New UPDATE thanks to comments.

The \b is useless and sometimes will break the command. See this SO topic for explanations. So the optimized answer would be :

mysqldump -u root -p -h <db-host> --opt <db-name> -d --single-transaction | sed 's/ AUTO_INCREMENT=[0-9]*//g' > <filename>.sql

Solution 2

JoDev's answer worked perfectly for me with a small adjustment to the sed regular expression:

mysqldump -d -h localhost -u<user> -p<password> <databaseName> | sed 's/ AUTO_INCREMENT=[0-9]*//g' > databaseStructure.sql

Solution 3

It is --create-options, which is included with --opt, by default, which generates the AUTO_INCREMENT table definitions.

If you only want the base tables,

mysql -hlocalhost -uuser -ppass --skip-column-names --batch \
    -e "select table_name from tables where table_type = 'BASE TABLE' and table_schema = 'schemaname'" INFORMATION_SCHEMA \
| xargs mysqldump -hlocalhost -uuser -ppass \
    --no-data --skip-triggers --skip-opt --no-create-db \
    schemaname

If you want views, triggers and routines too,

mysqldump -hlocalhost -uuser -ppass \
    --skip-opt --events --routines --no-data \
    schemaname

Solution 4

Thanks to this post, I was able to answer my question:

How can I do version control on my db?

Then I just created this script: db_bkp.sh

#!/bin/sh
filename="db_structure.sql"
backupfolder="/var/www/"
fpath="$backupfolder/$filename"
usr="DBUSER"
pass="DBPASS"
db="DBNAME"
mysqldump --user=$usr --password=$pass --no-data $db | sed 's/ AUTO_INCREMENT=[0-9]*//g' > "$fpath"

Then I added this to crontab:

30 5 * * * sh /home/scripts/db_bkp.sh

Then in my repo I added the result, db_structure.sql to git and before pushing changes to prod I always check if there's any structural changes I forgot to do on all dbs.

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Comments

[Rich]

I don't think --skip-auto-increment is a real option. I can't find it in the documentation. Neither of the two MySQL bugs for this issue mention it: 20786, 30957. Which version of mysqldump has this option?

[JoDev]

--skip-auto-increment is an option added in MySQL GUI Tools if a remember correctly. (not sure ^^) So in fact it's not really a solution! But the second inline command is correct, I founded it here where the topic talking about autoincrement issue, and provide the idea of sed filtering!

[Aquarion]

This will also remove the auto_increment flag on the fields it's enabled on, not just the auto_increment value at the end.

[Chris]

--skip-opt discussed here and here.

[Lex Podgorny]

Sed option would not remove all auto increments if you export multiple tables, only the last one. Also, --skip-auto-increment is not an existing option. How did this answer get to be rated so high?

[p91paul]

you need a g at the end of your sed command: sed 's/.../.../g' to replace all occurrences.

[Deanna]

Note that this also drops any auto increment fields, drop tables, character sets, etc.

[Aalex Gabi]

This command is not correct. --skip-auto-increment doesn't exist. The regex is not correct. As p91paul noted the g modifier needs to be added in order to replace all occurrences. Use @JohnW solution instead.

[David]

Yeah I'm not sure what that \b does within the sed statement, but as per @JohnW's suggestion here, the removal of that switch does the trick for me as well.

[Janne Annala]

The sed didn't work for me, I used sed 's/ AUTO_INCREMENT=[0-9]* / /g'

[Steve Chambers]

Would suggest removing all the attempts and just leaving the final one as new visitors arriving at this from Google won't need to know about the history.