feat: Add a resource to manage sequences

Addresses feature-request #509

docs/resources/sequence.md

@@ -0,0 +1,51 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "snowflake_sequence Resource - terraform-provider-snowflake"
+subcategory: ""
+description: |-
+  
+---
+
+# snowflake_sequence (Resource)
+
+
+
+## Example Usage
+
+```terraform
+resource "snowflake_database" "database" {
+	name    = "things"
+}
+
+resource "snowflake_schema" "test_schema" {
+	name     = "things"
+	database = snowflake_database.test_database.name
+}
+
+resource "snowflake_sequence" "test_sequence" {
+	database = snowflake_database.test_database.name
+	schema   = snowflake_schema.test_schema.name
+	name     = "thing_counter"
+}
+```
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Required
+
+- **database** (String) The database in which to create the sequence. Don't use the | character.
+- **name** (String) Specifies the name for the sequence.
+- **schema** (String) The schema in which to create the sequence. Don't use the | character.
+
+### Optional
+
+- **comment** (String) Specifies a comment for the sequence.
+- **id** (String) The ID of this resource.
+- **increment** (Number) The amount the sequence will increase by each time it is used
+
+### Read-Only
+
+- **next_value** (Number) The next value the sequance will provide.
+
+

examples/resources/snowflake_sequence/resource.tf

@@ -0,0 +1,14 @@
+resource "snowflake_database" "database" {
+	name    = "things"
+}
+
+resource "snowflake_schema" "test_schema" {
+	name     = "things"
+	database = snowflake_database.test_database.name
+}
+
+resource "snowflake_sequence" "test_sequence" {
+	database = snowflake_database.test_database.name
+	schema   = snowflake_schema.test_schema.name
+	name     = "thing_counter"
+}

go.sum

@@ -1008,10 +1008,6 @@ golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc
 golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
-golang.org/x/tools v0.1.1 h1:wGiQel/hW0NnEkJUk8lbzkX2gFJU6PFxf1v5OlCfuOs=
-golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-golang.org/x/tools v0.1.2 h1:kRBLX7v7Af8W7Gdbbc908OJcdgtK8bOz9Uaj8/F1ACA=
-golang.org/x/tools v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.3 h1:L69ShwSZEyCsLKoAxDKeMvLDZkumEe8gXUZAjab0tX8=
 golang.org/x/tools v0.1.3/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

pkg/provider/provider.go

@@ -168,6 +168,7 @@ func getResources() map[string]*schema.Resource {
 		"snowflake_role_grants":               resources.RoleGrants(),
 		"snowflake_schema":                    resources.Schema(),
 		"snowflake_scim_integration":          resources.SCIMIntegration(),
+		"snowflake_sequence":                  resources.Sequence(),
 		"snowflake_share":                     resources.Share(),
 		"snowflake_stage":                     resources.Stage(),
 		"snowflake_storage_integration":       resources.StorageIntegration(),

pkg/resources/helpers_test.go

@@ -129,6 +129,14 @@ func resourceMonitor(t *testing.T, id string, params map[string]interface{}) *sc
 	return d
 }
 
+func sequence(t *testing.T, id string, params map[string]interface{}) *schema.ResourceData {
+	r := require.New(t)
+	d := schema.TestResourceDataRaw(t, resources.Sequence().Schema, params)
+	r.NotNil(d)
+	d.SetId(id)
+	return d
+}
+
 func share(t *testing.T, id string, params map[string]interface{}) *schema.ResourceData {
 	r := require.New(t)
 	d := schema.TestResourceDataRaw(t, resources.Share().Schema, params)

pkg/resources/sequence.go

@@ -0,0 +1,200 @@
+package resources
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"strconv"
+
+	"github.com/chanzuckerberg/terraform-provider-snowflake/pkg/snowflake"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+	"github.com/pkg/errors"
+)
+
+var sequenceSchema = map[string]*schema.Schema{
+	"name": {
+		Type:        schema.TypeString,
+		Required:    true,
+		Description: "Specifies the name for the sequence.",
+	},
+	"comment": {
+		Type:        schema.TypeString,
+		Optional:    true,
+		Default:     "",
+		Description: "Specifies a comment for the sequence.",
+	},
+	"increment": {
+		Type:        schema.TypeInt,
+		Optional:    true,
+		Default:     1,
+		Description: "The amount the sequence will increase by each time it is used",
+	},
+	"database": {
+		Type:        schema.TypeString,
+		Required:    true,
+		Description: "The database in which to create the sequence. Don't use the | character.",
+	},
+	"schema": {
+		Type:        schema.TypeString,
+		Required:    true,
+		Description: "The schema in which to create the sequence. Don't use the | character.",
+	},
+	"next_value": {
+		Type:        schema.TypeInt,
+		Description: "The next value the sequance will provide.",
+		Computed:    true,
+	},
+}
+
+var sequenceProperties = []string{"comment", "data_retention_time_in_days"}
+
+// Sequence returns a pointer to the resource representing a sequence
+func Sequence() *schema.Resource {
+	return &schema.Resource{
+		Create: CreateSequence,
+		Read:   ReadSequence,
+		Delete: DeleteSequence,
+		Update: UpdateSequence,
+
+		Schema: sequenceSchema,
+		Importer: &schema.ResourceImporter{
+			StateContext: schema.ImportStatePassthroughContext,
+		},
+	}
+}
+
+// CreateSequence implements schema.CreateFunc
+func CreateSequence(d *schema.ResourceData, meta interface{}) error {
+	db := meta.(*sql.DB)
+	database := d.Get("database").(string)
+	schema := d.Get("schema").(string)
+	name := d.Get("name").(string)
+
+	sq := snowflake.Sequence(name, database, schema)
+
+	if i, ok := d.GetOk("increment"); ok {
+		sq.WithIncrement(i.(int))
+	}
+
+	if v, ok := d.GetOk("comment"); ok {
+		sq.WithComment(v.(string))
+	}
+
+	err := snowflake.Exec(db, sq.Create())
+	if err != nil {
+		return errors.Wrapf(err, "error creating sequence")
+	}
+
+	return ReadSequence(d, meta)
+}
+
+// ReadSequence implements schema.ReadFunc
+func ReadSequence(d *schema.ResourceData, meta interface{}) error {
+	db := meta.(*sql.DB)
+	database := d.Get("database").(string)
+	schema := d.Get("schema").(string)
+	name := d.Get("name").(string)
+
+	stmt := snowflake.Sequence(name, database, schema).Show()
+	row := snowflake.QueryRow(db, stmt)
+
+	sequence, err := snowflake.ScanSequence(row)
+
+	if err != nil {
+		if err == sql.ErrNoRows {
+			// If not found, mark resource to be removed from statefile during apply or refresh
+			log.Printf("[DEBUG] sequence (%s) not found", d.Id())
+			d.SetId("")
+			return nil
+		}
+		return errors.Wrap(err, "unable to scan row for SHOW SEQUENCES")
+	}
+
+	err = d.Set("schema", sequence.SchemaName.String)
+	if err != nil {
+		return err
+	}
+
+	err = d.Set("database", sequence.DBName.String)
+	if err != nil {
+		return err
+	}
+
+	err = d.Set("comment", sequence.Comment.String)
+	if err != nil {
+		return err
+	}
+
+	i, err := strconv.ParseInt(sequence.Increment.String, 10, 64)
+	if err != nil {
+		return err
+	}
+
+	err = d.Set("increment", i)
+	if err != nil {
+		return err
+	}
+
+	i, err = strconv.ParseInt(sequence.NextValue.String, 10, 64)
+	if err != nil {
+		return err
+	}
+
+	err = d.Set("next_value", i)
+	if err != nil {
+		return err
+	}
+
+	d.SetId(fmt.Sprintf(`%v|%v|%v`, sequence.DBName.String, sequence.SchemaName.String, sequence.Name.String))
+	if err != nil {
+		return err
+	}
+
+	return err
+}
+
+func UpdateSequence(d *schema.ResourceData, meta interface{}) error {
+	db := meta.(*sql.DB)
+	database := d.Get("database").(string)
+	schema := d.Get("schema").(string)
+	name := d.Get("name").(string)
+	next := d.Get("next_value").(int)
+
+	DeleteSequence(d, meta)
+
+	sq := snowflake.Sequence(name, database, schema)
+
+	if i, ok := d.GetOk("increment"); ok {
+		sq.WithIncrement(i.(int))
+	}
+
+	if v, ok := d.GetOk("comment"); ok {
+		sq.WithComment(v.(string))
+	}
+
+	sq.WithStart(next)
+
+	err := snowflake.Exec(db, sq.Create())
+	if err != nil {
+		return errors.Wrapf(err, "error creating sequence")
+	}
+
+	return ReadSequence(d, meta)
+}
+
+func DeleteSequence(d *schema.ResourceData, meta interface{}) error {
+	db := meta.(*sql.DB)
+	database := d.Get("database").(string)
+	schema := d.Get("schema").(string)
+	name := d.Get("name").(string)
+
+	stmt := snowflake.Sequence(name, database, schema).Drop()
+
+	err := snowflake.Exec(db, stmt)
+	if err != nil {
+		return errors.Wrapf(err, "error dropping sequence %s", name)
+	}
+
+	d.SetId("")
+	return nil
+}