Backport of Bug#36785 to mysql-next-mr

------------------------------------------------------------
revno: 2630.2.13
revision-id: davi@mysql.com-20080612190452-cx6h7rm557bcq7sa
parent: davi@mysql.com-20080611124915-csejwrxfdga9upho
committer: Davi Arnaut <davi@mysql.com>
branch nick: 36785-6.0
timestamp: Thu 2008-06-12 16:04:52 -0300
message:
  Bug#36785: Wrong error message when group_concat() exceeds max length

  The problem is that when ER_CUT_VALUE_GROUP_CONCAT is elevated
  to a error, the message does not get updated with the number of
  cut lines when group_concat() exceeds max length.

  The solution is to modify the warning message to be more meaningful
  by giving the number of the line that was cut and to issue the warning
  for each line that is cut. This approach is inline with how other
  per-row truncated data warnings are issued avoids violating the warning
  internal interface.

mysql-test/suite/sys_vars/r/group_concat_max_len_func.result

@@ -41,7 +41,10 @@ id	rollno	GROUP_CONCAT(name)
 4	3	Reco
 7	4	Reco
 Warnings:
-Warning	1260	4 line(s) were cut by GROUP_CONCAT()
+Warning	1260	Row 1 was cut by GROUP_CONCAT()
+Warning	1260	Row 2 was cut by GROUP_CONCAT()
+Warning	1260	Row 3 was cut by GROUP_CONCAT()
+Warning	1260	Row 4 was cut by GROUP_CONCAT()
 ## Changing session value of variable and verifying its behavior, ##
 ## warning should come here ##
 SET @@session.group_concat_max_len = 10;
@@ -52,7 +55,9 @@ id	rollno	GROUP_CONCAT(name)
 4	3	Record_4,R
 7	4	Record_7,R
 Warnings:
-Warning	1260	3 line(s) were cut by GROUP_CONCAT()
+Warning	1260	Row 2 was cut by GROUP_CONCAT()
+Warning	1260	Row 5 was cut by GROUP_CONCAT()
+Warning	1260	Row 7 was cut by GROUP_CONCAT()
 '#--------------------FN_DYNVARS_034_03-------------------------#'
 ## Connecting with new connection test_con2 ##
 ## Verifying initial value of variable. It should be 4 ##
@@ -71,7 +76,7 @@ id	rollno	GROUP_CONCAT(name)
 4	3	Record_4,Record_6
 7	4	Record_7,Record_8
 Warnings:
-Warning	1260	1 line(s) were cut by GROUP_CONCAT()
+Warning	1260	Row 3 was cut by GROUP_CONCAT()
 '#--------------------FN_DYNVARS_034_04-------------------------#'
 ## Setting session value of variable to 26. No warning should appear here ##
 ## because the value after concatination is less than 30 ##

sql/share/errmsg.txt

@@ -4880,6 +4880,7 @@ ER_ZLIB_Z_DATA_ERROR
         spa "ZLIB: Dato de entrada fu corrompido para zlib"
 ER_CUT_VALUE_GROUP_CONCAT  
         eng "Row %u was cut by GROUP_CONCAT()"
+        por "Linha %u foi cortada por GROUP_CONCAT()"
 ER_WARN_TOO_FEW_RECORDS 01000 
         eng "Row %ld doesn't contain data for all columns"
         ger "Zeile %ld enthlt nicht fr alle Felder Daten"