Hi, While we were recently discussing that OpenMRS should run on multiple database servers, I started working on Support Multiple Databases in OpenMRS Installation and Update <https://tickets.openmrs.org/browse/TRUNK-1925>. There are some of the following broad changes that need to be made the the liquibase xml so that we can install OpenMRS on different databases (target MySQL, Postgres, MsSQL... and may be later Oracle).
1.) Change datatypes and create tables that are compatible with all the databases (directly for compatible types or database specific for non-compatible types) 2.) Remove precision from many columns which are not compatible across all those database servers 3.) Divide a larger changeset into smaller changeset so that they can be done commonly (by changing syntax) across multiple database servers. 4.) Due to move to liquibase 2.0, all checksums for changesets have been NULL'd and then changed to the new format. This should happen automatically, but if anyone depends on these checksums, then you should reply to this email :) We may also have to change if anywhere non-ANSI syntax or MySQL-syntax has been used in the DAO. I haven't reached that far to tell how many such instances exist, but I hope there aren't many such places What do other developers think about these changes? Any suggestions on the way?? Anything that u think should be avoided or done?? These are fairly large changes and may result in incompatible checksums for already run changesets. PS: On a sidenote, I would like to highlight that for new installations it is silly that we are doing changesets based installations. While the world has moved to image based deployments for OS and large-software packages, we did the reverse and moved to changesets based installations. Upgrades are easier through changesets, but for new installations they are lengthy and boring. I would like to propose the for new installations, just an sqldump deploy is easy and fast, while keeping to changesets for upgrades. --- Regards, Saptarshi PURKAYASTHA My Tech Blog: http://sunnytalkstech.blogspot.com You Live by CHOICE, Not by CHANCE _________________________________________ To unsubscribe from OpenMRS Developers' mailing list, send an e-mail to [email protected] with "SIGNOFF openmrs-devel-l" in the body (not the subject) of your e-mail. [mailto:[email protected]?body=SIGNOFF%20openmrs-devel-l]
