fix: read binlog retention when null. Unique id

mysql/resource_binlog.go

@@ -2,8 +2,11 @@ package mysql
 
 import (
 	"context"
+	"database/sql"
 	"fmt"
 	"log"
+	"strconv"
+	"time"
 
 	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
 
@@ -44,7 +47,9 @@ func CreateBinLog(ctx context.Context, d *schema.ResourceData, meta interface{})
 		return diag.Errorf("failed running SQL to set binlog retention period: %v", err)
 	}
 
-	d.SetId(d.Get("retention_period").(string))
+	id := strconv.FormatInt(time.Now().UTC().UnixNano(), 10)
+
+	d.SetId(id)
 
 	return ReadBinLog(ctx, d, meta)
 }
@@ -86,15 +91,19 @@ func ReadBinLog(ctx context.Context, d *schema.ResourceData, meta interface{}) d
 		return diag.Errorf("Error verifying binlog retention period: %s", err)
 	}
 
-	results := make(map[string]string)
+	results := make(map[string]interface{})
 	for rows.Next() {
-		var name, value, description string
+		var name, description string
+		var value sql.NullString
 
 		if err := rows.Scan(&name, &value, &description); err != nil {
 			return diag.Errorf("failed reading binlog retention period: %v", err)
 		}
 		results[name] = value
 	}
+	if results["binlog retention hours"] == "NULL" {
+		results["binlog retention hours"] = "0"
+	}
 
 	d.Set("retention_period", results["binlog retention hours"])
 
@@ -121,9 +130,14 @@ func DeleteBinLog(ctx context.Context, d *schema.ResourceData, meta interface{})
 
 func binlogConfigSQL(d *schema.ResourceData) string {
 	retention_period := d.Get("retention_period").(string)
-
-	return fmt.Sprintf(
-		"call mysql.rds_set_configuration('binlog retention hours', %s)",
-		retention_period,
-	)
+	if retention_period == "0" {
+		return fmt.Sprintf(
+			"call mysql.rds_set_configuration('binlog retention hours', %s)",
+			"NULL")
+	} else {
+		return fmt.Sprintf(
+			"call mysql.rds_set_configuration('binlog retention hours', %s)",
+			retention_period,
+		)
+	}
 }