refs #4363 hcr rename blob, text, enum, and time types

git-svn-id: file:///svn/mysql/tokudb-engine/tokudb-engine@48714 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb_alter_56.cc

@@ -147,6 +147,13 @@ fix_handler_flags(TABLE *table, TABLE *altered_table, Alter_inplace_info *ha_alt
         handler_flags &= ~Alter_inplace_info::TOKU_ALTER_RENAME;
     }
 
+    // ALTER_COLUMN_TYPE may be set when no columns have been changed, so turn off the flag
+    if (handler_flags & Alter_inplace_info::ALTER_COLUMN_TYPE) {
+        if (all_fields_are_same_type(table, altered_table)) {
+            handler_flags &= ~Alter_inplace_info::ALTER_COLUMN_TYPE;
+        }
+    }
+
     return handler_flags;
 }
 
@@ -219,7 +226,8 @@ ha_tokudb::check_if_supported_inplace_alter(TABLE *altered_table, Alter_inplace_
         result = HA_ALTER_INPLACE_EXCLUSIVE_LOCK;
     } else
     // column rename
-    if (only_flags(ctx->handler_flags, Alter_inplace_info::ALTER_COLUMN_NAME + Alter_inplace_info::ALTER_COLUMN_DEFAULT)) {
+    if (ctx->handler_flags & Alter_inplace_info::ALTER_COLUMN_NAME &&
+        only_flags(ctx->handler_flags, Alter_inplace_info::ALTER_COLUMN_NAME + Alter_inplace_info::ALTER_COLUMN_DEFAULT)) {
         // we have identified a possible column rename, 
         // but let's do some more checks
         
@@ -234,7 +242,8 @@ ha_tokudb::check_if_supported_inplace_alter(TABLE *altered_table, Alter_inplace_
             result = HA_ALTER_INPLACE_EXCLUSIVE_LOCK;
     } else    
     // add column
-    if (only_flags(ctx->handler_flags, Alter_inplace_info::ADD_COLUMN + Alter_inplace_info::ALTER_COLUMN_ORDER)) {
+    if (ctx->handler_flags & Alter_inplace_info::ADD_COLUMN &&
+        only_flags(ctx->handler_flags, Alter_inplace_info::ADD_COLUMN + Alter_inplace_info::ALTER_COLUMN_ORDER)) {
         uint32_t added_columns[altered_table->s->fields];
         uint32_t num_added_columns = 0;
         int r = find_changed_columns(added_columns, &num_added_columns, table, altered_table);
@@ -250,7 +259,8 @@ ha_tokudb::check_if_supported_inplace_alter(TABLE *altered_table, Alter_inplace_
         }
     } else
     // drop column
-    if (only_flags(ctx->handler_flags, Alter_inplace_info::DROP_COLUMN + Alter_inplace_info::ALTER_COLUMN_ORDER)) {
+    if (ctx->handler_flags & Alter_inplace_info::DROP_COLUMN &&
+        only_flags(ctx->handler_flags, Alter_inplace_info::DROP_COLUMN + Alter_inplace_info::ALTER_COLUMN_ORDER)) {
         uint32_t dropped_columns[table->s->fields];
         uint32_t num_dropped_columns = 0;
         int r = find_changed_columns(dropped_columns, &num_dropped_columns, altered_table, table);

storage/tokudb/ha_tokudb_alter_common.cc

@@ -565,6 +565,19 @@ ha_tokudb::fill_row_mutator(
     return pos-buf;
 }
 
+static bool
+all_fields_are_same_type(TABLE *table_a, TABLE *table_b) {
+    if (table_a->s->fields != table_b->s->fields)
+        return false;
+    for (uint i = 0; i < table_a->s->fields; i++) {
+        Field *field_a = table_a->field[i];
+        Field *field_b = table_b->field[i];
+        if (!fields_are_same_type(field_a, field_b))
+            return false;
+    }
+    return true;
+}
+
 static bool 
 column_rename_supported(
     TABLE* orig_table, 
@@ -584,13 +597,13 @@ column_rename_supported(
         retval = false;
         goto cleanup;
     }
-    for (uint i = 0; i < orig_table->s->fields; i++) {
-        Field* orig_field = orig_table->field[i];
-        Field* new_field = new_table->field[i];
-        if (!fields_are_same_type(orig_field, new_field)) {
+    if (!all_fields_are_same_type(orig_table, new_table)) {
         retval = false;
         goto cleanup;
     }
+    for (uint i = 0; i < orig_table->s->fields; i++) {
+        Field* orig_field = orig_table->field[i];
+        Field* new_field = new_table->field[i];
         if (!fields_have_same_name(orig_field, new_field)) {
             num_fields_with_different_names++;
             field_with_different_name = i;