SQL: comment and check about ALTER in update_auto_increment()

88454b33 · Aleksey Midenkov · aa292666 · 88454b33
Commit 88454b33 authored Jul 24, 2017 by Aleksey Midenkov
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sql/handler.cc sql/handler.cc +2 -1

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--- a/sql/handler.cc
+++ b/sql/handler.cc
@@ -3029,7 +3029,8 @@ int handler::update_auto_increment()
  enum enum_check_fields save_count_cuted_fields;
  DBUG_ENTER("handler::update_auto_increment");
-  if (table->versioned_by_sql())
+  // System Versioning: handle ALTER ADD COLUMN AUTO_INCREMENT
+  if (thd->lex->sql_command == SQLCOM_ALTER_TABLE && table->versioned_by_sql())
  {
    Field *end= table->vers_end_field();
    DBUG_ASSERT(end);