Fixed bug#30059.

Server handles truncation for assignment of too-long values
into CHAR/VARCHAR/TEXT columns in a different ways when the
truncated characters are spaces:
1. CHAR(N) columns silently ignore end-space truncation;
2. TEXT columns post a truncation warning/error in the
   non-strict/strict mode.
3. VARCHAR columns always post a truncation note in
   any mode.

Space truncation processing has been synchronised over
CHAR/VARCHAR/TEXT columns: current behavior of VARCHAR
columns has been propagated as standard.

Binary-encoded string/BLOB columns are not affected.


mysql-test/r/heap.result:
  Updated test case for bug#30059.
mysql-test/r/innodb.result:
  Updated test case for bug#30059.
mysql-test/r/myisam.result:
  Updated test case for bug#30059.
mysql-test/r/strict.result:
  Updated test case for bug#30059.
mysql-test/r/type_binary.result:
  Updated test case for bug#30059.
mysql-test/r/warnings.result:
  Added test case for bug#30059.
mysql-test/t/warnings.test:
  Added test case for bug#30059.
sql/field.cc:
  Fixed bug#30059.
  The report_data_too_long function was replaced with the
  Field_longstr::report_if_important_data method.
  
  The Field_string::store and the Field_blob::store
  methods was synchronized with the Field_varstring::store
  method.
  Changes:
  1. to CHAR(N): posting of space truncation note has been added
     in both (strict and non-strict) modes;
  2. to BLOBs: a check for space truncation has been added,
     a warning in the non-strict mode and an error message in
     the strict mode have been replaced with a truncation note.
  
  Similar parts of Field_string::store, Field_blob::store and
  Field_varstring::store have been moved to the
  Field_longstr::report_if_important_data method.
sql/field.h:
  Fixed bug#30059.
  The Field_longstr::report_if_important_data method has been declared.

1 files changed, 38 insertions, 0 deletions

diff --git a/mysql-test/r/warnings.result b/mysql-test/r/warnings.result
index 9ce1f9c825d..e74f92205aa 100644
--- a/mysql-test/r/warnings.result
+++ b/mysql-test/r/warnings.result
@@ -298,4 +298,42 @@ DROP TABLE t3;
 DROP PROCEDURE sp1;
 DROP PROCEDURE sp2;
 DROP PROCEDURE sp3;
+create table t1 (c_char char(255), c_varchar varchar(255), c_tinytext tinytext);
+create table t2 (c_tinyblob tinyblob);
+set @c = repeat(' ', 256);
+set @q = repeat('q', 256);
+set sql_mode = '';
+insert into t1 values(@c, @c, @c);
+Warnings:
+Note	1265	Data truncated for column 'c_char' at row 1
+Note	1265	Data truncated for column 'c_varchar' at row 1
+Note	1265	Data truncated for column 'c_tinytext' at row 1
+insert into t2 values(@c);
+Warnings:
+Warning	1265	Data truncated for column 'c_tinyblob' at row 1
+insert into t1 values(@q, @q, @q);
+Warnings:
+Warning	1265	Data truncated for column 'c_char' at row 1
+Warning	1265	Data truncated for column 'c_varchar' at row 1
+Warning	1265	Data truncated for column 'c_tinytext' at row 1
+insert into t2 values(@q);
+Warnings:
+Warning	1265	Data truncated for column 'c_tinyblob' at row 1
+set sql_mode = 'traditional';
+insert into t1 values(@c, @c, @c);
+Warnings:
+Note	1265	Data truncated for column 'c_char' at row 1
+Note	1265	Data truncated for column 'c_varchar' at row 1
+Note	1265	Data truncated for column 'c_tinytext' at row 1
+insert into t2 values(@c);
+ERROR 22001: Data too long for column 'c_tinyblob' at row 1
+insert into t1 values(@q, NULL, NULL);
+ERROR 22001: Data too long for column 'c_char' at row 1
+insert into t1 values(NULL, @q, NULL);
+ERROR 22001: Data too long for column 'c_varchar' at row 1
+insert into t1 values(NULL, NULL, @q);
+ERROR 22001: Data too long for column 'c_tinytext' at row 1
+insert into t2 values(@q);
+ERROR 22001: Data too long for column 'c_tinyblob' at row 1
+drop table t1, t2;
 End of 5.0 tests