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The patch adds the code that allows to use equi-join conditions

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for hash join in the cases when there are no suitable indexes
for these conditions.
This commit is contained in:
Igor Babaev
2011-01-04 21:59:41 -08:00
parent 77cbad4b31
commit af800fd92f
16 changed files with 1500 additions and 301 deletions
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7
sql/sql_join_cache.cc
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@@ -1052,9 +1052,8 @@ bool JOIN_CACHE::check_emb_key_usage()
CACHE_FIELD *copy;
CACHE_FIELD *copy_end;
uint len= 0;
TABLE *table= join_tab->table;
TABLE_REF *ref= &join_tab->ref;
KEY *keyinfo= table->key_info+ref->key;
KEY *keyinfo= join_tab->get_keyinfo_by_key_no(ref->key);
/*
If some of the key arguments are not from the local cache the key
@@ -2520,7 +2519,7 @@ int JOIN_CACHE_HASHED::init()
pack_length+= get_size_of_rec_offset();
pack_length_with_blob_ptrs+= get_size_of_rec_offset();
ref_key_info= join_tab->table->key_info+join_tab->ref.key;
ref_key_info= join_tab->get_keyinfo_by_key_no(join_tab->ref.key);
ref_used_key_parts= join_tab->ref.key_parts;
hash_func= &JOIN_CACHE_HASHED::get_hash_idx_simple;
@@ -3427,7 +3426,7 @@ uchar *JOIN_CACHE_BNLH::get_matching_chain_by_join_key()
uchar *key_ref_ptr;
TABLE *table= join_tab->table;
TABLE_REF *ref= &join_tab->ref;
KEY *keyinfo= table->key_info+ref->key;
KEY *keyinfo= join_tab->get_keyinfo_by_key_no(ref->key);
/* Build the join key value out of the record in the record buffer */
key_copy(key_buff, table->record[0], keyinfo, key_length, TRUE);
/* Look for this key in the join buffer */