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Support for TIMESTAMP columns holding NULL values. Unlike all other

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column types TIMESTAMP is NOT NULL by default, so in order to have 
TIMESTAMP column holding NULL valaues you have to specify NULL as
one of its attributes (this needed for backward compatibility).

Main changes:
Replaced TABLE::timestamp_default_now/on_update_now members with
TABLE::timestamp_auto_set_type flag which is used everywhere
for determining if we should auto-set value of TIMESTAMP field 
during this operation or not. We are also use Field_timestamp::set_time()
instead of handler::update_timestamp() in handlers.
This commit is contained in:
dlenev@brandersnatch.localdomain
2004-10-01 18:54:06 +04:00
parent d03f447f84
commit 2511990c97
25 changed files with 195 additions and 111 deletions
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4
sql/sql_update.cc
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@ -116,7 +116,7 @@ int mysql_update(THD *thd,
{
// Don't set timestamp column if this is modified
if (table->timestamp_field->query_id == thd->query_id)
table->timestamp_on_update_now= 0;
table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
else
table->timestamp_field->query_id=timestamp_query_id;
}
@ -526,7 +526,7 @@ int mysql_multi_update(THD *thd,
// Only set timestamp column if this is not modified
if (table->timestamp_field &&
table->timestamp_field->query_id == thd->query_id)
table->timestamp_on_update_now= 0;
table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
/* if table will be updated then check that it is unique */
if (table->map & item_tables)