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Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were

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updated.

INSERT ... ON DUPLICATE KEY UPDATE reports that a record was updated when
the duplicate key occurs even if the record wasn't actually changed
because the update values are the same as those in the record.

Now the compare_record() function is used to check whether the record was
changed and the update of a record reported only if the record differs
from the original one.
This commit is contained in:
evgen@moonbone.local
2007-02-07 00:46:03 +03:00
parent 5092f7ab26
commit 968369906e
5 changed files with 43 additions and 11 deletions
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1
sql/mysql_priv.h
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@ -701,6 +701,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
char* packet, uint packet_length);
void log_slow_statement(THD *thd);
bool check_dup(const char *db, const char *name, TABLE_LIST *tables);
bool compare_record(TABLE *table, query_id_t query_id);
bool table_cache_init(void);
void table_cache_free(void);