ps_10nestset.test
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- ###############################################
- # #
- # Prepared Statements test on #
- # "nested sets" representing hierarchies #
- # #
- ###############################################
- # Source: http://kris.koehntopp.de/artikel/sql-self-references (dated 1999)
- # Source: http://dbmsmag.com/9603d06.html (dated 1996)
- --disable_warnings
- drop table if exists t1;
- --enable_warnings
- # "Nested Set": This table represents an employee list with a hierarchy tree.
- # The tree is not modeled by "parent" links but rather by showing the "left"
- # and "right" border of any person's "region". By convention, "l" < "r".
- # As it is a tree, these "regions" of two persons A and B are either disjoint,
- # or A's region is completely contained in B's (B.l < A.l < A.r < B.r:
- # B is A's boss), or vice versa.
- # Any other overlaps violate the model. See the references for more info.
- create table t1 (
- id INTEGER AUTO_INCREMENT PRIMARY KEY,
- emp CHAR(10) NOT NULL,
- salary DECIMAL(6,2) NOT NULL,
- l INTEGER NOT NULL,
- r INTEGER NOT NULL);
- prepare st_ins from 'insert into t1 set emp = ?, salary = ?, l = ?, r = ?';
- # Initial employee list:
- # Jerry ( Bert () Chuck ( Donna () Eddie () Fred () ) )
- set @arg_nam= 'Jerry'; set @arg_sal= 1000; set @arg_l= 1; set @arg_r= 12;
- execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ;
- set @arg_nam= 'Bert'; set @arg_sal= 900; set @arg_l= 2; set @arg_r= 3;
- execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ;
- set @arg_nam= 'Chuck'; set @arg_sal= 900; set @arg_l= 4; set @arg_r= 11;
- execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ;
- set @arg_nam= 'Donna'; set @arg_sal= 800; set @arg_l= 5; set @arg_r= 6;
- execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ;
- set @arg_nam= 'Eddie'; set @arg_sal= 700; set @arg_l= 7; set @arg_r= 8;
- execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ;
- set @arg_nam= 'Fred'; set @arg_sal= 600; set @arg_l= 9; set @arg_r= 10;
- execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ;
- select * from t1;
- # Three successive raises, each one is 100 units for managers, 10 percent for others.
- prepare st_raise_base from 'update t1 set salary = salary * ( 1 + ? ) where r - l = 1';
- prepare st_raise_mgr from 'update t1 set salary = salary + ? where r - l > 1';
- let $1= 3;
- set @arg_percent= .10;
- set @arg_amount= 100;
- while ($1)
- {
- execute st_raise_base using @arg_percent;
- execute st_raise_mgr using @arg_amount;
- dec $1;
- }
- select * from t1;
- # Now, increase salary to a multiple of 50 (checks for bug#6138)
- prepare st_round from 'update t1 set salary = salary + ? - ( salary MOD ? )';
- set @arg_round= 50;
- execute st_round using @arg_round, @arg_round;
- select * from t1;
- drop table t1;
- # End of 4.1 tests