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Bug#31291 ALTER TABLE CONVERT TO CHARACTER SET does not change some data types

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added ability for TINY[MEDIUM] text fields 
to be converted to greater subtype during
alter if necessary(altered charset)


mysql-test/r/alter_table.result:
  test result
mysql-test/t/alter_table.test:
  test case
sql/sql_table.cc:
  added ability for TINY[MEDIUM] text fields 
  to be converted to greater subtype during
  alter if necessary(altered charset)
This commit is contained in:
Sergey Glukhov 2008-12-09 16:38:52 +04:00
commit 419e053a41
3 changed files with 32 additions and 1 deletions
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4
sql/sql_table.cc
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@ -1535,7 +1535,9 @@ static bool prepare_blob_field(THD *thd, create_field *sql_field)
if ((sql_field->flags & BLOB_FLAG) && sql_field->length)
{
if (sql_field->sql_type == FIELD_TYPE_BLOB)
if (sql_field->sql_type == FIELD_TYPE_BLOB ||
sql_field->sql_type == FIELD_TYPE_TINY_BLOB ||
sql_field->sql_type == FIELD_TYPE_MEDIUM_BLOB)
{
/* The user has given a length to the blob column */
sql_field->sql_type= get_blob_type_from_length(sql_field->length);