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699291a8e6
- Make the range-et-al optimizer produce E(#table records after table
condition is applied),
- Make the join optimizer use this value,
- Add "filtered" column to EXPLAIN EXTENDED to show
fraction of records left after table condition is applied
- Adjust test results, add comments
76 lines
4.5 KiB
Plaintext
76 lines
4.5 KiB
Plaintext
select interval(55,10,20,30,40,50,60,70,80,90,100),interval(3,1,1+1,1+1+1+1),field("IBM","NCA","ICL","SUN","IBM","DIGITAL"),field("A","B","C"),elt(2,"ONE","TWO","THREE"),interval(0,1,2,3,4),elt(1,1,2,3)|0,elt(1,1.1,1.2,1.3)+0;
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interval(55,10,20,30,40,50,60,70,80,90,100) interval(3,1,1+1,1+1+1+1) field("IBM","NCA","ICL","SUN","IBM","DIGITAL") field("A","B","C") elt(2,"ONE","TWO","THREE") interval(0,1,2,3,4) elt(1,1,2,3)|0 elt(1,1.1,1.2,1.3)+0
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5 2 4 0 TWO 0 1 1.1
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explain extended select INTERVAL(55,10,20,30,40,50,60,70,80,90,100),interval(3,1,1+1,1+1+1+1),field("IBM","NCA","ICL","SUN","IBM","DIGITAL"),field("A","B","C"),elt(2,"ONE","TWO","THREE"),interval(0,1,2,3,4),elt(1,1,2,3)|0,elt(1,1.1,1.2,1.3)+0;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select interval((55,10,20,30,40,50,60,70,80,90,100)) AS `INTERVAL(55,10,20,30,40,50,60,70,80,90,100)`,interval((3,1,(1 + 1),(((1 + 1) + 1) + 1))) AS `interval(3,1,1+1,1+1+1+1)`,field(_latin1'IBM',_latin1'NCA',_latin1'ICL',_latin1'SUN',_latin1'IBM',_latin1'DIGITAL') AS `field("IBM","NCA","ICL","SUN","IBM","DIGITAL")`,field(_latin1'A',_latin1'B',_latin1'C') AS `field("A","B","C")`,elt(2,_latin1'ONE',_latin1'TWO',_latin1'THREE') AS `elt(2,"ONE","TWO","THREE")`,interval((0,1,2,3,4)) AS `interval(0,1,2,3,4)`,(elt(1,1,2,3) | 0) AS `elt(1,1,2,3)|0`,(elt(1,1.1,1.2,1.3) + 0) AS `elt(1,1.1,1.2,1.3)+0`
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SELECT INTERVAL(13, 7, 14, 21, 28, 35, 42, 49, 56);
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INTERVAL(13, 7, 14, 21, 28, 35, 42, 49, 56)
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1
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SELECT INTERVAL(13, 7, 14, 21, 28, 35, 42, 49, 56, 77);
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INTERVAL(13, 7, 14, 21, 28, 35, 42, 49, 56, 77)
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1
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select find_in_set("b","a,b,c"),find_in_set("c","a,b,c"),find_in_set("dd","a,bbb,dd"),find_in_set("bbb","a,bbb,dd");
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find_in_set("b","a,b,c") find_in_set("c","a,b,c") find_in_set("dd","a,bbb,dd") find_in_set("bbb","a,bbb,dd")
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2 3 3 2
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select find_in_set("d","a,b,c"),find_in_set("dd","a,bbb,d"),find_in_set("bb","a,bbb,dd");
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find_in_set("d","a,b,c") find_in_set("dd","a,bbb,d") find_in_set("bb","a,bbb,dd")
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0 0 0
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select make_set(0,'a','b','c'),make_set(-1,'a','b','c'),make_set(1,'a','b','c'),make_set(2,'a','b','c'),make_set(1+2,concat('a','b'),'c');
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make_set(0,'a','b','c') make_set(-1,'a','b','c') make_set(1,'a','b','c') make_set(2,'a','b','c') make_set(1+2,concat('a','b'),'c')
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a,b,c a b ab,c
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select make_set(NULL,'a','b','c'),make_set(1|4,'a',NULL,'c'),make_set(1+2,'a',NULL,'c');
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make_set(NULL,'a','b','c') make_set(1|4,'a',NULL,'c') make_set(1+2,'a',NULL,'c')
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NULL a,c a
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select export_set(9,"Y","N","-",5),export_set(9,"Y","N"),export_set(9,"Y","N","");
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export_set(9,"Y","N","-",5) export_set(9,"Y","N") export_set(9,"Y","N","")
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Y-N-N-Y-N Y,N,N,Y,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N YNNYNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
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select elt(2,1),field(NULL,"a","b","c");
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elt(2,1) field(NULL,"a","b","c")
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NULL 0
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select field("b","a",NULL),field(1,0,NULL)+0,field(1.0,0.0,NULL)+0.0,field(1.0e1,0.0e1,NULL)+0.0e1;
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field("b","a",NULL) field(1,0,NULL)+0 field(1.0,0.0,NULL)+0.0 field(1.0e1,0.0e1,NULL)+0.0e1
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0 0 0.0 0
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select field(NULL,"a",NULL),field(NULL,0,NULL)+0,field(NULL,0.0,NULL)+0.0,field(NULL,0.0e1,NULL)+0.0e1;
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field(NULL,"a",NULL) field(NULL,0,NULL)+0 field(NULL,0.0,NULL)+0.0 field(NULL,0.0e1,NULL)+0.0e1
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0 0 0.0 0
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select find_in_set("","a,b,c"),find_in_set("","a,b,c,"),find_in_set("",",a,b,c");
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find_in_set("","a,b,c") find_in_set("","a,b,c,") find_in_set("",",a,b,c")
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0 4 1
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select find_in_set("abc","abc"),find_in_set("ab","abc"),find_in_set("abcd","abc");
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find_in_set("abc","abc") find_in_set("ab","abc") find_in_set("abcd","abc")
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1 0 0
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select interval(null, 1, 10, 100);
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interval(null, 1, 10, 100)
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-1
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drop table if exists t1,t2;
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create table t1 (id int(10) not null unique);
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create table t2 (id int(10) not null primary key, val int(10) not null);
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insert into t1 values (1),(2),(4);
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insert into t2 values (1,1),(2,1),(3,1),(4,2);
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select one.id, elt(two.val,'one','two') from t1 one, t2 two where two.id=one.id;
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id elt(two.val,'one','two')
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1 one
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2 one
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4 two
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select one.id, elt(two.val,'one','two') from t1 one, t2 two where two.id=one.id order by one.id;
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id elt(two.val,'one','two')
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1 one
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2 one
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4 two
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drop table t1,t2;
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select find_in_set(binary 'a',binary 'A,B,C');
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find_in_set(binary 'a',binary 'A,B,C')
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0
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select find_in_set('a',binary 'A,B,C');
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find_in_set('a',binary 'A,B,C')
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0
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select find_in_set(binary 'a', 'A,B,C');
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find_in_set(binary 'a', 'A,B,C')
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0
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select find_in_set('1','3,1,');
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find_in_set('1','3,1,')
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2
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