From 60d114f696b4ba315834bd6b642699ea3ee94a59 Mon Sep 17 00:00:00 2001
From: Lukas Budisky <lukas.budisky@dewist.com>
Date: Fri, 8 Nov 2019 16:29:47 +0100
Subject: [PATCH] Extend mysql DSN connection parameters

New optional parameter for configuring mysql DSN connection
- conn_params (map) - allow configure mysql connection parameters
---
 mysql/provider.go                | 17 +++++++++++++++++
 website/docs/index.html.markdown |  1 +
 2 files changed, 18 insertions(+)

diff --git a/mysql/provider.go b/mysql/provider.go
index 256b6e61..fe6eb99d 100644
--- a/mysql/provider.go
+++ b/mysql/provider.go
@@ -91,6 +91,12 @@ func Provider() terraform.ResourceProvider {
 				Optional: true,
 			},
 
+			"conn_params": {
+				Type:     schema.TypeMap,
+				Optional: true,
+				Default:  nil,
+			},
+
 			"authentication_plugin": {
 				Type:         schema.TypeString,
 				Optional:     true,
@@ -114,12 +120,22 @@ func Provider() terraform.ResourceProvider {
 func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 
 	var endpoint = d.Get("endpoint").(string)
+	var conn_params = make(map[string]string)
 
 	proto := "tcp"
 	if len(endpoint) > 0 && endpoint[0] == '/' {
 		proto = "unix"
 	}
 
+	for k, v := range d.Get("conn_params").(map[string]interface{}) {
+		temp, ok := v.(string)
+		if !ok {
+			fmt.Errorf("Cannot convert connection parameters to string")
+		} else {
+			conn_params[k] = temp
+		}
+	}
+
 	conf := mysql.Config{
 		User:                    d.Get("username").(string),
 		Passwd:                  d.Get("password").(string),
@@ -128,6 +144,7 @@ func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 		TLSConfig:               d.Get("tls").(string),
 		AllowNativePasswords:    d.Get("authentication_plugin").(string) == nativePasswords,
 		AllowCleartextPasswords: d.Get("authentication_plugin").(string) == cleartextPasswords,
+		Params:                  conn_params,
 	}
 
 	dialer, err := makeDialer(d)
diff --git a/website/docs/index.html.markdown b/website/docs/index.html.markdown
index ffd9882c..dc215c5f 100644
--- a/website/docs/index.html.markdown
+++ b/website/docs/index.html.markdown
@@ -84,3 +84,4 @@ The following arguments are supported:
 * `max_conn_lifetime_sec` - (Optional) Sets the maximum amount of time a connection may be reused. If d <= 0, connections are reused forever.
 * `max_open_conns` - (Optional) Sets the maximum number of open connections to the database. If n <= 0, then there is no limit on the number of open connections.
 * `authentication_plugin` - (Optional) Sets the authentication plugin, it can be one of the following: `native` or `cleartext`. Defaults to `native`.
+* `conn_params` - (Optional) Configure mysql DSN parameters. Default value `nil`.