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Take into account that table scans may use indexes

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monty@hundin.mysql.fi
2002-01-30 16:07:11 +02:00
parent 869b7914be
commit c396824b2a
5 changed files with 22 additions and 7 deletions
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12
sql/handler.h
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@ -42,16 +42,13 @@
#define HA_ADMIN_INVALID -5
/* Bits in bas_flag to show what database can do */
#define HA_READ_NEXT 1 /* Read next record with same key */
#define HA_READ_PREV 2 /* Read prev. record with same key */
#define HA_READ_ORDER 4 /* Read through record-keys in order */
#define HA_READ_RND_SAME 8 /* Read RND-record to KEY-record
(To update with RND-read) */
#define HA_KEYPOS_TO_RNDPOS 16 /* ha_info gives pos to record */
#define HA_LASTKEY_ORDER 32 /* Next record gives next record
according last record read (even
if database is updated after read) */
#define HA_TABLE_SCAN_ON_INDEX 32 /* No separate data/index file */
#define HA_REC_NOT_IN_SEQ 64 /* ha_info don't return recnumber;
It returns a position to ha_r_rnd */
#define HA_ONLY_WHOLE_INDEX 128 /* Can't use part key searches */
@ -78,6 +75,13 @@
#define HA_CAN_FULLTEXT (HA_NO_PREFIX_CHAR_KEYS*2)
#define HA_CAN_SQL_HANDLER (HA_CAN_FULLTEXT*2)
/* Old not used flags */
/*
Next record gives next record according last record read (even
if database is updated after read)
*/
#define HA_LASTKEY_ORDER 0
/* Parameters for open() (in register form->filestat) */
/* HA_GET_INFO does an implicit HA_ABORT_IF_LOCKED */