Applying InnoDB snapshot 5.1-ss6242, part 8. Fixes BUG#47720

1. BUG#47720 - REPLACE INTO Autoincrement column with negative values.

Detailed revision comments:

r6235 | sunny | 2009-11-26 01:14:42 +0200 (Thu, 26 Nov 2009) | 9 lines
branches/5.1: Fix Bug#47720 - REPLACE INTO Autoincrement column with negative values.

This bug is similiar to the negative autoinc filter patch from earlier,
with the additional handling of filtering out the negative column values
set explicitly by the user.

rb://184
Approved by Heikki.

mysql-test/r/innodb-autoinc.result

@@ -1151,3 +1151,42 @@ T1	CREATE TABLE `T1` (
   PRIMARY KEY (`C1`)
 ) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=latin1
 DROP TABLE T1;
+DROP TABLE IF EXISTS t1;
+Warnings:
+Note	1051	Unknown table 't1'
+CREATE TABLE t1 (c1 INT AUTO_INCREMENT PRIMARY KEY) ENGINE=InnoDB;
+INSERT INTO t1 SET c1 = 1;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `c1` int(11) NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`c1`)
+) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1
+INSERT INTO t1 SET c1 = 2;
+INSERT INTO t1 SET c1 = -1;
+SELECT * FROM t1;
+c1
+-1
+1
+2
+INSERT INTO t1 SET c1 = -1;
+Got one of the listed errors
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `c1` int(11) NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`c1`)
+) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=latin1
+REPLACE INTO t1 VALUES (-1);
+SELECT * FROM t1;
+c1
+-1
+1
+2
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `c1` int(11) NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`c1`)
+) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=latin1
+DROP TABLE t1;

mysql-test/t/innodb-autoinc.test

@@ -639,3 +639,21 @@ INSERT INTO T1(C1, C2) VALUES (1, 'innodb'), (3, 'innodb');
 INSERT INTO T1(C2) VALUES ('innodb');
 SHOW CREATE TABLE T1;
 DROP TABLE T1;
+
+##
+# 47720: REPLACE INTO Autoincrement column with negative values
+#
+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1 (c1 INT AUTO_INCREMENT PRIMARY KEY) ENGINE=InnoDB;
+INSERT INTO t1 SET c1 = 1;
+SHOW CREATE TABLE t1;
+INSERT INTO t1 SET c1 = 2;
+INSERT INTO t1 SET c1 = -1;
+SELECT * FROM t1;
+-- error ER_DUP_ENTRY,1062
+INSERT INTO t1 SET c1 = -1;
+SHOW CREATE TABLE t1;
+REPLACE INTO t1 VALUES (-1);
+SELECT * FROM t1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;

storage/innobase/handler/ha_innodb.cc

@@ -4060,9 +4060,11 @@ ha_innobase::write_row(
 			update the table upper limit. Note: last_value
 			will be 0 if get_auto_increment() was not called.*/
 
-			if (auto_inc <= col_max_value
-			    && auto_inc >= prebuilt->autoinc_last_value) {
+			if (auto_inc >= prebuilt->autoinc_last_value) {
 set_max_autoinc:
+				/* This should filter out the negative
+				values set explicitly by the user. */
+				if (auto_inc <= col_max_value) {
 					ut_a(prebuilt->autoinc_increment > 0);
 
 					ulonglong	need;
@@ -4072,14 +4074,17 @@ ha_innobase::write_row(
 					need = prebuilt->autoinc_increment;
 
 					auto_inc = innobase_next_autoinc(
-					auto_inc, need, offset, col_max_value);
+						auto_inc,
+						need, offset, col_max_value);
 
-				err = innobase_set_max_autoinc(auto_inc);
+					err = innobase_set_max_autoinc(
+						auto_inc);
 
 					if (err != DB_SUCCESS) {
 						error = err;
 					}
 				}
+			}
 			break;
 		}
 	}