bk commit into 4.1 tree (jimw:1.2311) BUG#11203

[Jim Winstead]

Below is the list of changes that have just been committed into a local
4.1 repository of jimw. When jimw does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
For information on how to access the public repository
see http://dev.mysql.com/doc/mysql/en/installing-source-tree.html

ChangeSet
  1.2311 05/06/22 16:14:14 jimw@stripped +4 -0
  Fix LOAD DATA to handle having the escape and enclosed-by character
  be the same. (Bug #11203)

  mysql-test/std_data/loaddata5.dat
    1.1 05/06/22 16:14:11 jimw@stripped +3 -0
    New BitKeeper file ``mysql-test/std_data/loaddata5.dat''

  sql/sql_load.cc
    1.84 05/06/22 16:14:11 jimw@stripped +17 -2
    Handle having escape_char and enclosed_char the same when loading
    data.

  mysql-test/t/loaddata.test
    1.8 05/06/22 16:14:11 jimw@stripped +8 -0
    Add new test

  mysql-test/std_data/loaddata5.dat
    1.0 05/06/22 16:14:11 jimw@stripped +0 -0
    BitKeeper file /home/jimw/my/mysql-4.1-11203/mysql-test/std_data/loaddata5.dat

  mysql-test/r/loaddata.result
    1.15 05/06/22 16:14:11 jimw@stripped +8 -0
    Update results

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	jimw
# Host:	rama.(none)
# Root:	/home/jimw/my/mysql-4.1-11203

--- 1.83/sql/sql_load.cc	2004-12-31 02:04:30 -08:00
+++ 1.84/sql/sql_load.cc	2005-06-22 16:14:11 -07:00
@@ -799,8 +799,23 @@
 	  *to++= (byte) escape_char;
 	  goto found_eof;
 	}
-	*to++ = (byte) unescape((char) chr);
-	continue;
+        /*
+          When escape_char == enclosed_char, we treat it like we do for
+          handling quotes in SQL parsing -- you can double-up the
+          escape_char to include it literally, but it doesn't do escapes
+          like \n. This allows: LOAD DATA ... ENCLOSED BY '"' ESCAPED BY '"'
+          with data like: "fie""ld1", "field2"
+         */
+        if (escape_char != enclosed_char || chr == escape_char)
+        {
+          *to++ = (byte) unescape((char) chr);
+          continue;
+        }
+        else
+        {
+          PUSH(chr);
+          chr= escape_char;
+        }
       }
 #ifdef ALLOW_LINESEPARATOR_IN_STRINGS
       if (chr == line_term_char)
--- New file ---
+++ mysql-test/std_data/loaddata5.dat	05/06/22 16:14:11
"field1","field2"
"a""b","cd""ef"
"a"b",c"d"e


--- 1.14/mysql-test/r/loaddata.result	2004-06-15 13:38:33 -07:00
+++ 1.15/mysql-test/r/loaddata.result	2005-06-22 16:14:11 -07:00
@@ -66,3 +66,11 @@
 3	row 3
 0	
 drop table t1;
+create table t1 (a varchar(20), b varchar(20));
+load data infile '../../std_data/loaddata5.dat' into table t1 fields terminated by ','
enclosed by '"' escaped by '"' (a,b);
+select * from t1;
+a	b
+field1	field2
+a"b	cd"ef
+a"b	c"d"e
+drop table t1;

--- 1.7/mysql-test/t/loaddata.test	2004-03-20 02:29:41 -08:00
+++ 1.8/mysql-test/t/loaddata.test	2005-06-22 16:14:11 -07:00
@@ -31,3 +31,11 @@
 select * from t1;
 drop table t1;
 
+#
+# Bug #11203: LOAD DATA does not accept same characters for ESCAPED and
+# ENCLOSED
+#
+create table t1 (a varchar(20), b varchar(20));
+load data infile '../../std_data/loaddata5.dat' into table t1 fields terminated by ','
enclosed by '"' escaped by '"' (a,b);
+select * from t1;
+drop table t1;