trx0trx.h, trx0trx.c, ha_innodb.cc:

  Remove code never actually used in IGNORE; InnoDB just rolls back the latest row insert or update on a duplicate key error and leaves it for MySQL to decide whether to ignore the error

innobase/include/trx0trx.h

@@ -418,10 +418,6 @@ struct trx_struct{
 	lock_t*		auto_inc_lock;	/* possible auto-inc lock reserved by
 					the transaction; note that it is also
 					in the lock list trx_locks */
-        ibool           ignore_duplicates_in_insert;
-                                        /* in an insert roll back only insert
-                                        of the latest row in case
-                                        of a duplicate key error */
 	UT_LIST_NODE_T(trx_t)
 			trx_list;	/* list of transactions */
 	UT_LIST_NODE_T(trx_t)

innobase/trx/trx0trx.c

@@ -102,8 +102,6 @@ trx_create(
 	trx->mysql_master_log_file_name = (char*) "";
 	trx->mysql_master_log_pos = 0;
 	
-	trx->ignore_duplicates_in_insert = FALSE;
-
 	mutex_create(&(trx->undo_mutex));
 	mutex_set_level(&(trx->undo_mutex), SYNC_TRX_UNDO);
 

sql/ha_innodb.cc

@@ -1911,13 +1911,6 @@ ha_innobase::write_row(
 		build_template(prebuilt, NULL, table, ROW_MYSQL_WHOLE_ROW);
 	}
 
-	if (user_thd->lex.sql_command == SQLCOM_INSERT
-	    && user_thd->lex.duplicates == DUP_IGNORE) {
-	        prebuilt->trx->ignore_duplicates_in_insert = TRUE;
-        } else {
-	        prebuilt->trx->ignore_duplicates_in_insert = FALSE;
-	}
-
 	srv_conc_enter_innodb(prebuilt->trx);
 
 	error = row_insert_for_mysql((byte*) record, prebuilt);
@@ -1958,8 +1951,6 @@ ha_innobase::write_row(
 		}
 	}
 
-	prebuilt->trx->ignore_duplicates_in_insert = FALSE;
-
 	error = convert_error_code_to_mysql(error, user_thd);
 
 	/* Tell InnoDB server that there might be work for