Add support for Materialized Views (#13251) (#973)

[upstream:f2af0ac8352389c4f510f9479cecdde719543f9d]

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

bigtable_materialized_view/backing_file.tf

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+# This file has some scaffolding to make sure that names are unique and that
+# a region and zone are selected when you try to create your Terraform resources.
+
+locals {
+  name_suffix = "${random_pet.suffix.id}"
+}
+
+resource "random_pet" "suffix" {
+  length = 2
+}
+
+provider "google" {
+  region = "us-central1"
+  zone   = "us-central1-c"
+}

bigtable_materialized_view/main.tf

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+resource "google_bigtable_instance" "instance" {
+  name = "bt-instance-${local.name_suffix}"
+  cluster {
+    cluster_id   = "cluster-1"
+    zone         = "us-east1-b"
+    num_nodes    = 3
+    storage_type = "HDD"
+  }
+
+  deletion_protection  = false
+}
+
+resource "google_bigtable_table" "table" {
+  name          = "bt-table-${local.name_suffix}"
+  instance_name = google_bigtable_instance.instance.name
+
+  column_family {
+	family = "CF"
+  }
+}
+
+resource "google_bigtable_materialized_view" "materialized_view" {
+  materialized_view_id = "bt-materialized-view-${local.name_suffix}"
+  instance             = google_bigtable_instance.instance.name
+  deletion_protection  = false
+  query = <<EOT
+SELECT _key, COUNT(CF['col1']) as Count
+FROM ` + "`bt-table-${local.name_suffix}`" + `
+GROUP BY _key
+EOT
+
+  depends_on = [
+    google_bigtable_table.table
+  ]
+}

bigtable_materialized_view/motd

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+===
+
+These examples use real resources that will be billed to the
+Google Cloud Platform project you use - so make sure that you
+run "terraform destroy" before quitting!
+
+===

bigtable_materialized_view/tutorial.md

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+# Bigtable Materialized View - Terraform
+
+## Setup
+
+<walkthrough-author name="[email protected]" analyticsId="UA-125550242-1" tutorialName="bigtable_materialized_view" repositoryUrl="https://github.com/terraform-google-modules/docs-examples"></walkthrough-author>
+
+Welcome to Terraform in Google Cloud Shell! We need you to let us know what project you'd like to use with Terraform.
+
+<walkthrough-project-billing-setup></walkthrough-project-billing-setup>
+
+Terraform provisions real GCP resources, so anything you create in this session will be billed against this project.
+
+## Terraforming!
+
+Let's use {{project-id}} with Terraform! Click the Cloud Shell icon below to copy the command
+to your shell, and then run it from the shell by pressing Enter/Return. Terraform will pick up
+the project name from the environment variable.
+
+```bash
+export GOOGLE_CLOUD_PROJECT={{project-id}}
+```
+
+After that, let's get Terraform started. Run the following to pull in the providers.
+
+```bash
+terraform init
+```
+
+With the providers downloaded and a project set, you're ready to use Terraform. Go ahead!
+
+```bash
+terraform apply
+```
+
+Terraform will show you what it plans to do, and prompt you to accept. Type "yes" to accept the plan.
+
+```bash
+yes
+```
+
+
+## Post-Apply
+
+### Editing your config
+
+Now you've provisioned your resources in GCP! If you run a "plan", you should see no changes needed.
+
+```bash
+terraform plan
+```
+
+So let's make a change! Try editing a number, or appending a value to the name in the editor. Then,
+run a 'plan' again.
+
+```bash
+terraform plan
+```
+
+Afterwards you can run an apply, which implicitly does a plan and shows you the intended changes
+at the 'yes' prompt.
+
+```bash
+terraform apply
+```
+
+```bash
+yes
+```
+
+## Cleanup
+
+Run the following to remove the resources Terraform provisioned:
+
+```bash
+terraform destroy
+```
+```bash
+yes
+```