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ha_innobase.h:

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Lower max key len to 3500 bytes because a secondary index record must also contain the primary key value


sql/ha_innobase.h:
  Lower max key len to 3500 bytes because a secondary index record must also contain the primary key value
This commit is contained in:
unknown 2001-12-22 11:18:22 +02:00
parent 474ed9fdfc
commit 1b9930b1a8
1 changed files with 6 additions and 4 deletions
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10
sql/ha_innobase.h
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@ -96,10 +96,12 @@ class ha_innobase: public handler
uint max_record_length() const { return HA_MAX_REC_LENGTH; }
uint max_keys() const { return MAX_KEY; }
uint max_key_parts() const { return MAX_REF_PARTS; }
/* An InnoDB page must store >= 2 keys:
max key length is therefore set to 7000
bytes */
uint max_key_length() const { return 7000; }
/* An InnoDB page must store >= 2 keys;
a secondary key record must also contain the
primary key value:
max key length is therefore set to slightly
less than 1 / 4 of page size which is 16 kB */
uint max_key_length() const { return 3500; }
bool fast_key_read() { return 1;}
key_map keys_to_use_for_scanning() { return ~(key_map) 0; }
bool has_transactions() { return 1;}