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Automatic conversion from CHAR(length) to BLOB when length > 255

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New operators MOD and DIV
SELECT ... FROM DUAL
TRUE = 1 and FALSE = 0
This commit is contained in:
monty@mashka.mysql.fi
2002-11-21 02:07:14 +02:00
parent f86d328927
commit 305d16a7cb
39 changed files with 223 additions and 41 deletions
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28
sql/sql_parse.cc
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@ -3026,6 +3026,7 @@ bool add_field_to_list(char *field_name, enum_field_types type,
THD *thd=current_thd;
LEX *lex= &thd->lex;
uint allowed_type_modifier=0;
char warn_buff[MYSQL_ERRMSG_SIZE];
DBUG_ENTER("add_field_to_list");
if (strlen(field_name) > NAME_LEN)
@ -3117,8 +3118,6 @@ bool add_field_to_list(char *field_name, enum_field_types type,
if (!length) new_field->length=20;
allowed_type_modifier= AUTO_INCREMENT_FLAG;
break;
case FIELD_TYPE_STRING:
case FIELD_TYPE_VAR_STRING:
case FIELD_TYPE_NULL:
case FIELD_TYPE_GEOMETRY:
break;
@ -3129,10 +3128,35 @@ bool add_field_to_list(char *field_name, enum_field_types type,
if (new_field->decimals)
new_field->length++;
break;
case FIELD_TYPE_STRING:
case FIELD_TYPE_VAR_STRING:
if (new_field->length < MAX_FIELD_WIDTH || default_value)
break;
/* Convert long CHAR() and VARCHAR columns to TEXT or BLOB */
new_field->sql_type= FIELD_TYPE_BLOB;
sprintf(warn_buff, ER(ER_AUTO_CONVERT), field_name, "CHAR",
(cs == my_charset_bin) ? "BLOB" : "TEXT");
push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_AUTO_CONVERT,
warn_buff);
/* fall through */
case FIELD_TYPE_BLOB:
case FIELD_TYPE_TINY_BLOB:
case FIELD_TYPE_LONG_BLOB:
case FIELD_TYPE_MEDIUM_BLOB:
if (new_field->length)
{
/* The user has given a length to the blob column */
if (new_field->length < 256)
type= FIELD_TYPE_TINY_BLOB;
if (new_field->length < 65536)
type= FIELD_TYPE_BLOB;
else if (new_field->length < 256L*256L*256L)
type= FIELD_TYPE_MEDIUM_BLOB;
else
type= FIELD_TYPE_LONG_BLOB;
new_field->length= 0;
}
new_field->sql_type= type;
if (default_value) // Allow empty as default value
{
String str,*res;