anchor.diff:  
   CCR::
   * Add ccr follow info api {pull}37408[#37408] (issue: {issue}37127[#37127])
  +
  +CRUD::
  +* Make `_doc` work as an alias of the actual type of an index. {pull}39505[#39505] (issue: {issue}39469[#39469])
   
   Features/ILM::
   * [ILM] Add unfollow action {pull}36970[#36970] (issue: {issue}34648[#34648])
  
positive.code: * SQL: Fix issue with always false filter involving functions {pull}36830[#36830] (issue: {issue}35980[#35980])
  * SQL: protocol returns ISO 8601 String formatted dates instead of Long for JDBC/ODBC requests {pull}36800[#36800] (issue: {issue}36756[#36756])
  * SQL: Enhance Verifier to prevent aggregate or grouping functions from {pull}36799[#36799] (issue: {issue}36798[#36798])
  
  Search::
  * Fix simple query string serialization conditional {pull}38960[#38960] (issues: {issue}21504[#21504], {issue}38889[#38889])
  
negative.code: * RecoveryMonitor#lastSeenAccessTime should be volatile {pull}36781[#36781]
  
  SQL::
  * SQL: Fix merging of incompatible multi-fields {pull}39560[#39560] (issue: {issue}39547[#39547])
  * SQL: fix COUNT DISTINCT column name {pull}39537[#39537] (issue: {issue}39511[#39511])
  * SQL: ignore UNSUPPORTED fields for JDBC and ODBC modes in 'SYS COLUMNS' {pull}39518[#39518] (issue: {issue}39471[#39471])
  * SQL: Use underlying exact field for LIKE/RLIKE {pull}39443[#39443] (issue: {issue}39442[#39442])
  * SQL: enforce JDBC driver - ES server version parity {pull}38972[#38972] (issue: {issue}38775[#38775])
  * SQL: fall back to using the field name for column label {pull}38842[#38842] (issue: {issue}38831[#38831])
  * SQL: Prevent grouping over grouping functions {pull}38649[#38649] (issue: {issue}38308[#38308])
  