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Merge gbichot3.local:/home/mysql_src/mysql-5.1-interval-move-next-insert-id

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into  gbichot3.local:/home/mysql_src/mysql-5.1
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guilhem@gbichot3.local
2006-07-09 22:50:02 +02:00
parent 17efd43b1a 0594e1b84b
commit bca3fc7800
30 changed files with 1223 additions and 390 deletions
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50
sql/handler.h
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@ -906,16 +906,37 @@ public:
uint ref_length;
FT_INFO *ft_handler;
enum {NONE=0, INDEX, RND} inited;
bool auto_increment_column_changed;
bool implicit_emptied; /* Can be !=0 only if HEAP */
const COND *pushed_cond;
/*
next_insert_id is the next value which should be inserted into the
auto_increment column: in a inserting-multi-row statement (like INSERT
SELECT), for the first row where the autoinc value is not specified by the
statement, get_auto_increment() called and asked to generate a value,
next_insert_id is set to the next value, then for all other rows
next_insert_id is used (and increased each time) without calling
get_auto_increment().
*/
ulonglong next_insert_id;
/*
insert id for the current row (*autogenerated*; if not
autogenerated, it's 0).
At first successful insertion, this variable is stored into
THD::first_successful_insert_id_in_cur_stmt.
*/
ulonglong insert_id_for_cur_row;
/*
Interval returned by get_auto_increment() and being consumed by the
inserter.
*/
Discrete_interval auto_inc_interval_for_cur_row;
handler(const handlerton *ht_arg, TABLE_SHARE *share_arg)
:table_share(share_arg), estimation_rows_to_insert(0), ht(ht_arg),
ref(0), key_used_on_scan(MAX_KEY), active_index(MAX_KEY),
ref_length(sizeof(my_off_t)),
ft_handler(0), inited(NONE), implicit_emptied(0),
pushed_cond(NULL)
pushed_cond(NULL), next_insert_id(0), insert_id_for_cur_row(0)
{}
virtual ~handler(void)
{
@ -1248,9 +1269,30 @@ public:
ulonglong nb_desired_values,
ulonglong *first_value,
ulonglong *nb_reserved_values);
private:
virtual void release_auto_increment() { return; };
virtual void restore_auto_increment();
public:
void ha_release_auto_increment();
void set_next_insert_id(ulonglong id)
{
DBUG_PRINT("info",("auto_increment: next value %lu", (ulong)id));
next_insert_id= id;
}
void restore_auto_increment(ulonglong prev_insert_id)
{
/*
Insertion of a row failed, re-use the lastly generated auto_increment
id, for the next row. This is achieved by resetting next_insert_id to
what it was before the failed insertion (that old value is provided by
the caller). If that value was 0, it was the first row of the INSERT;
then if insert_id_for_cur_row contains 0 it means no id was generated
for this first row, so no id was generated since the INSERT started, so
we should set next_insert_id to 0; if insert_id_for_cur_row is not 0, it
is the generated id of the first and failed row, so we use it.
*/
next_insert_id= (prev_insert_id > 0) ? prev_insert_id :
insert_id_for_cur_row;
}
/*
Reset the auto-increment counter to the given value, i.e. the next row
inserted will get the given value. This is called e.g. after TRUNCATE