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2597b1aadd
Cleanup of multi-table-delete in sql_yacc.yy Changed syntax of MAXIMUM QUERIES PER HOUR to MAX_QUERIES_PER_HOUR to not get too many reserved words.
46 lines
1.8 KiB
Text
46 lines
1.8 KiB
Text
drop table if exists t1;
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set @`test`=1,@TEST=3,@select=2,@t5=1.23456;
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select @test,@`select`,@TEST,@not_used;
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@test @`select` @TEST @not_used
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1 2 3 NULL
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set @test_int=10,@test_double=1e-10,@test_string="abcdeghi",@test_string2="abcdefghij",@select=NULL;
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select @test_int,@test_double,@test_string,@test_string2,@select;
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@test_int @test_double @test_string @test_string2 @select
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10 1e-10 abcdeghi abcdefghij NULL
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set @test_int="hello",@test_double="hello",@test_string="hello",@test_string2="hello";
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select @test_int,@test_double,@test_string,@test_string2;
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@test_int @test_double @test_string @test_string2
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hello hello hello hello
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set @test_int="hellohello",@test_double="hellohello",@test_string="hellohello",@test_string2="hellohello";
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select @test_int,@test_double,@test_string,@test_string2;
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@test_int @test_double @test_string @test_string2
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hellohello hellohello hellohello hellohello
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set @test_int=null,@test_double=null,@test_string=null,@test_string2=null;
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select @test_int,@test_double,@test_string,@test_string2;
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@test_int @test_double @test_string @test_string2
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NULL NULL NULL NULL
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select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
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@t1:=(@t2:=1)+@t3:=4 @t1 @t2 @t3
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5 5 1 4
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select @t5;
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@t5
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1.23456
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CREATE TABLE t1 (c_id INT(4) NOT NULL, c_name CHAR(20), c_country CHAR(3), PRIMARY KEY(c_id));
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INSERT INTO t1 VALUES (1,'Bozo','USA'),(2,'Ronald','USA'),(3,'Kinko','IRE'),(4,'Mr. Floppy','GB');
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SELECT @min_cid:=min(c_id), @max_cid:=max(c_id) from t1;
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@min_cid:=min(c_id) @max_cid:=max(c_id)
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1 4
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SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid;
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c_id c_name c_country
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1 Bozo USA
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4 Mr. Floppy GB
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SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid OR c_id=666;
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c_id c_name c_country
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1 Bozo USA
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4 Mr. Floppy GB
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ALTER TABLE t1 DROP PRIMARY KEY;
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select * from t1 where c_id=@min_cid OR c_id=@max_cid;
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c_id c_name c_country
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1 Bozo USA
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4 Mr. Floppy GB
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drop table t1;
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