New Data Source: azurerm_sql_database

[leewilson86]

A new data source to be able to query Azure SQL Databases.

[katbyte]

Thanks for the PR @leewilson86!

Overall this looks good with some minor comments i've left inline. however could we reorganize the properties in the schema to match the resource.go file? thanks!

[katbyte]

This should be at the top & first.

[katbyte]

Followed by this

[katbyte]

And the rest should follow the ordering found in the resource file.

[katbyte]

We don't need this check as d.Set will check for nilness

[katbyte]

Same here:

Suggested change

	d.Set("elastic_pool_name", ep)
	d.Set("elastic_pool_name", props.ElasticPoolName)

[katbyte]

and here

[katbyte]

This can be replaced with:

Suggested change

	d.Set("read_scale", readScale)
	d.Set("read_scale", props.ReadScale == sql.ReadScaleEnabled)

[katbyte]

Most of these properties actually reside in the anonymous property resp.DatabaseProperties that could be nil. Thus we need to nil check it:

if props := respo.DatabaseProperties; props != nil {
    d.Set("collation", props.Collation)

[leewilson86]

@katbyte thanks for the feedback. I have addressed your comments.

[katbyte]

Thanks for the revisions @leewilson86! LGTM now 🚀

[MattMencel]

If we wanted to add a way to list all the databases in a single azure_sql_server instance, would you want that in a separate data resource? azurerm_sql_databases ?

[leewilson86]

@MattMencel that’s a good question and actually something I have been thinking about myself. I’m just not sure how best to return a list of databases, or if it’s a good idea, as there’ll be a lot of opinions on format etc. What format would we return the database? Would it be an array of database resource IDs or database names? A map? A list of maps?

If this is a reasonable feature to add I think it probably best belongs with the existing azurerm_sql_server data source like this: data.azurerm_sql_server.server[0].databases.

However, would it be better to have databases defined as vars (possibly in .tfvars) and passed into the relevant resources for creation then those vars can be used to query for database details with this data source I’ve just created? This is pretty much how the Terraform config I’m working with operates.

Your idea could work too as a dedicated resource for returning lists of databases on a server. Just not too sure on the best approach.

Maybe @katbyte can advise?

The data source I’ve added here is purely for the intention of querying a specific database on a given server.

[katbyte]

@MattMencel, @leewilson86 is right in that the best place for that is the azurerm_sql_server datasource as `azurerm_sql_server.databases.

[ghost]

This has been released in version 1.34.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 1.34.0"
}
# ... other configuration ...

[ghost]

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