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MDEV-16188 Use in-memory PK filters built from range index scans

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This patch contains a full implementation of the optimization
that allows to use in-memory rowid / primary filters built for range  
conditions over indexes. In many cases usage of such filters reduce  
the number of disk seeks spent for fetching table rows.

In this implementation the choice of what possible filter to be applied  
(if any) is made purely on cost-based considerations.

This implementation re-achitectured the partial implementation of
the feature pushed by Galina Shalygina in the commit
8d5a11122c.

Besides this patch contains a better implementation of the generic  
handler function handler::multi_range_read_info_const() that
takes into account gaps between ranges when calculating the cost of
range index scans. It also contains some corrections of the
implementation of the handler function records_in_range() for MyISAM.

This patch supports the feature for InnoDB and MyISAM.
This commit is contained in:
Igor Babaev
2019-02-03 14:56:12 -08:00
parent 5f46670bd0
commit 658128af43
190 changed files with 5685 additions and 2017 deletions
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16
mysql-test/main/mysql_client_test.result
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@ -135,7 +135,7 @@ EXPALIN number of fields: 10
- 5: name: 'key'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 6: name: 'key_len'/''; table: ''/''; db: ''; catalog: 'def'; length: 12288; max_length: 0; type: 253; decimals: 39
- 7: name: 'ref'/''; table: ''/''; db: ''; catalog: 'def'; length: 6144; max_length: 0; type: 253; decimals: 39
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 10; max_length: 0; type: 8; decimals: 0
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 9: name: 'Extra'/''; table: ''/''; db: ''; catalog: 'def'; length: 765; max_length: 0; type: 253; decimals: 39
EXPALIN JSON number of fields: 1
- 0: name: 'EXPLAIN'/''; table: ''/''; db: ''; catalog: 'def'; length: 234; max_length: 0; type: 253; decimals: 39
@ -148,7 +148,7 @@ ANALYZE number of fields: 13
- 5: name: 'key'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 6: name: 'key_len'/''; table: ''/''; db: ''; catalog: 'def'; length: 12288; max_length: 0; type: 253; decimals: 39
- 7: name: 'ref'/''; table: ''/''; db: ''; catalog: 'def'; length: 6144; max_length: 0; type: 253; decimals: 39
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 10; max_length: 0; type: 8; decimals: 0
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 9: name: 'r_rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 10
- 10: name: 'filtered'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 2
- 11: name: 'r_filtered'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 2
@ -164,7 +164,7 @@ EXPALIN INSERT number of fields: 10
- 5: name: 'key'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 6: name: 'key_len'/''; table: ''/''; db: ''; catalog: 'def'; length: 12288; max_length: 0; type: 253; decimals: 39
- 7: name: 'ref'/''; table: ''/''; db: ''; catalog: 'def'; length: 6144; max_length: 0; type: 253; decimals: 39
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 10; max_length: 0; type: 8; decimals: 0
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 9: name: 'Extra'/''; table: ''/''; db: ''; catalog: 'def'; length: 765; max_length: 0; type: 253; decimals: 39
EXPALIN JSON INSERT number of fields: 1
- 0: name: 'EXPLAIN'/''; table: ''/''; db: ''; catalog: 'def'; length: 234; max_length: 0; type: 253; decimals: 39
@ -177,7 +177,7 @@ ANALYZE INSERT number of fields: 13
- 5: name: 'key'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 6: name: 'key_len'/''; table: ''/''; db: ''; catalog: 'def'; length: 12288; max_length: 0; type: 253; decimals: 39
- 7: name: 'ref'/''; table: ''/''; db: ''; catalog: 'def'; length: 6144; max_length: 0; type: 253; decimals: 39
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 10; max_length: 0; type: 8; decimals: 0
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 9: name: 'r_rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 10
- 10: name: 'filtered'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 2
- 11: name: 'r_filtered'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 2
@ -193,7 +193,7 @@ EXPALIN UPDATE number of fields: 10
- 5: name: 'key'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 6: name: 'key_len'/''; table: ''/''; db: ''; catalog: 'def'; length: 12288; max_length: 0; type: 253; decimals: 39
- 7: name: 'ref'/''; table: ''/''; db: ''; catalog: 'def'; length: 6144; max_length: 0; type: 253; decimals: 39
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 10; max_length: 0; type: 8; decimals: 0
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 9: name: 'Extra'/''; table: ''/''; db: ''; catalog: 'def'; length: 765; max_length: 0; type: 253; decimals: 39
EXPALIN JSON UPDATE number of fields: 1
- 0: name: 'EXPLAIN'/''; table: ''/''; db: ''; catalog: 'def'; length: 234; max_length: 0; type: 253; decimals: 39
@ -206,7 +206,7 @@ ANALYZE UPDATE number of fields: 13
- 5: name: 'key'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 6: name: 'key_len'/''; table: ''/''; db: ''; catalog: 'def'; length: 12288; max_length: 0; type: 253; decimals: 39
- 7: name: 'ref'/''; table: ''/''; db: ''; catalog: 'def'; length: 6144; max_length: 0; type: 253; decimals: 39
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 10; max_length: 0; type: 8; decimals: 0
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 9: name: 'r_rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 10
- 10: name: 'filtered'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 2
- 11: name: 'r_filtered'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 2
@ -222,7 +222,7 @@ EXPALIN DELETE number of fields: 10
- 5: name: 'key'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 6: name: 'key_len'/''; table: ''/''; db: ''; catalog: 'def'; length: 12288; max_length: 0; type: 253; decimals: 39
- 7: name: 'ref'/''; table: ''/''; db: ''; catalog: 'def'; length: 6144; max_length: 0; type: 253; decimals: 39
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 10; max_length: 0; type: 8; decimals: 0
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 9: name: 'Extra'/''; table: ''/''; db: ''; catalog: 'def'; length: 765; max_length: 0; type: 253; decimals: 39
EXPALIN JSON DELETE number of fields: 1
- 0: name: 'EXPLAIN'/''; table: ''/''; db: ''; catalog: 'def'; length: 234; max_length: 0; type: 253; decimals: 39
@ -235,7 +235,7 @@ ANALYZE DELETE number of fields: 13
- 5: name: 'key'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 6: name: 'key_len'/''; table: ''/''; db: ''; catalog: 'def'; length: 12288; max_length: 0; type: 253; decimals: 39
- 7: name: 'ref'/''; table: ''/''; db: ''; catalog: 'def'; length: 6144; max_length: 0; type: 253; decimals: 39
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 10; max_length: 0; type: 8; decimals: 0
- 8: name: 'rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 192; max_length: 0; type: 253; decimals: 39
- 9: name: 'r_rows'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 10
- 10: name: 'filtered'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 2
- 11: name: 'r_filtered'/''; table: ''/''; db: ''; catalog: 'def'; length: 4; max_length: 0; type: 5; decimals: 2