Set activity_date_time and created_date to default to current_timestamp

CRM/Activity/DAO/Activity.php

@@ -6,7 +6,7 @@
  *
  * Generated from xml/schema/CRM/Activity/Activity.xml
  * DO NOT EDIT.  Generated by CRM_Core_CodeGen
- * (GenCodeChecksum:69e64467532d53d75fadb5148fe42e76)
+ * (GenCodeChecksum:bb8686f72b71e21504c9b7bc95489a0c)
  */
 
 /**
@@ -328,10 +328,12 @@ class CRM_Activity_DAO_Activity extends CRM_Core_DAO {
           'type' => CRM_Utils_Type::T_DATE + CRM_Utils_Type::T_TIME,
           'title' => ts('Activity Date'),
           'description' => ts('Date and time this activity is scheduled to occur. Formerly named scheduled_date_time.'),
+          'required' => FALSE,
           'import' => TRUE,
           'where' => 'civicrm_activity.activity_date_time',
           'headerPattern' => '/(activity.)?date(.time$)?/i',
           'export' => TRUE,
+          'default' => 'CURRENT_TIMESTAMP',
           'table_name' => 'civicrm_activity',
           'entity' => 'Activity',
           'bao' => 'CRM_Activity_BAO_Activity',
@@ -672,7 +674,7 @@ class CRM_Activity_DAO_Activity extends CRM_Core_DAO {
           'required' => FALSE,
           'where' => 'civicrm_activity.created_date',
           'export' => TRUE,
-          'default' => 'NULL',
+          'default' => 'CURRENT_TIMESTAMP',
           'table_name' => 'civicrm_activity',
           'entity' => 'Activity',
           'bao' => 'CRM_Activity_BAO_Activity',

CRM/Upgrade/Incremental/General.php

@@ -56,7 +56,7 @@ class CRM_Upgrade_Incremental_General {
    *
    * @see install/index.php
    */
-  const MIN_INSTALL_MYSQL_VER = '5.5';
+  const MIN_INSTALL_MYSQL_VER = '5.6.5';
 
   /**
    * The minimum MySQL/MariaDB version required to install Civi.

CRM/Upgrade/Incremental/sql/5.28.alpha1.mysql.tpl

 {* file to handle db changes in 5.28.alpha1 during upgrade *}
+
+-- https://github.com/civicrm/civicrm-core/pull/17450
+ALTER TABLE `civicrm_activity` CHANGE `activity_date_time` `activity_date_time` datetime NULL  DEFAULT CURRENT_TIMESTAMP COMMENT 'Date and time this activity is scheduled to occur. Formerly named scheduled_date_time.';
+ALTER TABLE `civicrm_activity` CHANGE `created_date` `created_date` timestamp NULL  DEFAULT CURRENT_TIMESTAMP COMMENT 'When was the activity was created.';

xml/schema/Activity/Activity.xml

@@ -122,6 +122,9 @@
   <field>
     <name>activity_date_time</name>
     <import>true</import>
+    <required>false</required>
+    <export>true</export>
+    <default>CURRENT_TIMESTAMP</default>
     <title>Activity Date</title>
     <type>datetime</type>
     <headerPattern>/(activity.)?date(.time$)?/i</headerPattern>
@@ -467,7 +470,7 @@
     <comment>When was the activity was created.</comment>
     <required>false</required>
     <export>true</export>
-    <default>NULL</default>
+    <default>CURRENT_TIMESTAMP</default>
     <add>4.7</add>
   </field>
   <field>