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Add extra ordered index in when UNIQUE and PRIMARY KEY are specified.

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Extra ordered indexes are created primarily 
to support partial key scan/read and range scans of hash indexes.
I.e. the ordered index are used instead of the hash indexes for 
these queries.


sql/ha_ndbcluster.cc:
  Add creation and use of extra ordered indexes on pk and unique indexes.
sql/ha_ndbcluster.h:
  Added new functions for creating extra ordered indexes
This commit is contained in:
unknown 2004-04-30 12:25:31 +02:00
commit 0f0635ec0f
2 changed files with 159 additions and 38 deletions
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6
sql/ha_ndbcluster.h
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@ -135,11 +135,14 @@ class ha_ndbcluster: public handler
private:
int alter_table_name(const char *from, const char *to);
int drop_table();
int create_index(const char *name, KEY *key_info);
int create_index(const char *name, KEY *key_info, bool unique);
int create_ordered_index(const char *name, KEY *key_info);
int create_unique_index(const char *name, KEY *key_info);
int initialize_autoincrement(const void* table);
int get_metadata(const char* path);
void release_metadata();
const char* get_index_name(uint idx_no) const;
const char* get_unique_index_name(uint idx_no) const;
NDB_INDEX_TYPE get_index_type(uint idx_no) const;
NDB_INDEX_TYPE get_index_type_from_table(uint index_no) const;
@ -193,6 +196,7 @@ class ha_ndbcluster: public handler
THR_LOCK_DATA m_lock;
NDB_SHARE *m_share;
NDB_INDEX_TYPE m_indextype[MAX_KEY];
const char* m_unique_index_name[MAX_KEY];
NdbRecAttr *m_value[NDB_MAX_ATTRIBUTES_IN_TABLE];
bool m_use_write;
};