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6aa4482f2f
function, connectby(), which can serve as a reference implementation for
the changes made in the last few days -- namely the ability of a
function to return an entire tuplestore, and the ability of a function
to make use of the query provided "expected" tuple description.
Description:
connectby(text relname, text keyid_fld, text parent_keyid_fld,
text start_with, int max_depth [, text branch_delim])
- returns keyid, parent_keyid, level, and an optional branch string
- requires anonymous composite type syntax in the FROM clause. See
the instructions in the documentation below.
Joe Conway
86 lines
5.1 KiB
SQL
86 lines
5.1 KiB
SQL
--
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-- normal_rand()
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--
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SELECT * FROM normal_rand(100, 250, 5, EXTRACT(SECONDS FROM CURRENT_TIME(0))::int);
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--
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-- crosstab()
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--
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create table ct(id serial, rowclass text, rowid text, attribute text, value text);
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insert into ct(rowclass, rowid, attribute, value) values('group1','test1','att1','val1');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test1','att2','val2');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test1','att3','val3');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test1','att4','val4');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test2','att1','val5');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test2','att2','val6');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test2','att3','val7');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test2','att4','val8');
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insert into ct(rowclass, rowid, attribute, value) values('group2','test3','att1','val1');
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insert into ct(rowclass, rowid, attribute, value) values('group2','test3','att2','val2');
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insert into ct(rowclass, rowid, attribute, value) values('group2','test3','att3','val3');
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insert into ct(rowclass, rowid, attribute, value) values('group2','test4','att1','val4');
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insert into ct(rowclass, rowid, attribute, value) values('group2','test4','att2','val5');
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insert into ct(rowclass, rowid, attribute, value) values('group2','test4','att3','val6');
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select * from crosstab2('select rowid, attribute, value from ct where rowclass = ''group1'' and (attribute = ''att2'' or attribute = ''att3'') order by 1,2;');
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select * from crosstab3('select rowid, attribute, value from ct where rowclass = ''group1'' and (attribute = ''att2'' or attribute = ''att3'') order by 1,2;');
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select * from crosstab4('select rowid, attribute, value from ct where rowclass = ''group1'' and (attribute = ''att2'' or attribute = ''att3'') order by 1,2;');
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select * from crosstab2('select rowid, attribute, value from ct where rowclass = ''group1'' order by 1,2;');
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select * from crosstab3('select rowid, attribute, value from ct where rowclass = ''group1'' order by 1,2;');
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select * from crosstab4('select rowid, attribute, value from ct where rowclass = ''group1'' order by 1,2;');
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select * from crosstab2('select rowid, attribute, value from ct where rowclass = ''group2'' and (attribute = ''att1'' or attribute = ''att2'') order by 1,2;');
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select * from crosstab3('select rowid, attribute, value from ct where rowclass = ''group2'' and (attribute = ''att1'' or attribute = ''att2'') order by 1,2;');
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select * from crosstab4('select rowid, attribute, value from ct where rowclass = ''group2'' and (attribute = ''att1'' or attribute = ''att2'') order by 1,2;');
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select * from crosstab2('select rowid, attribute, value from ct where rowclass = ''group2'' order by 1,2;');
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select * from crosstab3('select rowid, attribute, value from ct where rowclass = ''group2'' order by 1,2;');
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select * from crosstab4('select rowid, attribute, value from ct where rowclass = ''group2'' order by 1,2;');
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select * from crosstab('select rowid, attribute, value from ct where rowclass = ''group1'' order by 1,2;', 2) as c(rowid text, att1 text, att2 text);
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select * from crosstab('select rowid, attribute, value from ct where rowclass = ''group1'' order by 1,2;', 3) as c(rowid text, att1 text, att2 text, att3 text);
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select * from crosstab('select rowid, attribute, value from ct where rowclass = ''group1'' order by 1,2;', 4) as c(rowid text, att1 text, att2 text, att3 text, att4 text);
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-- test connectby with text based hierarchy
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DROP TABLE connectby_tree;
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CREATE TABLE connectby_tree(keyid text, parent_keyid text);
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INSERT INTO connectby_tree VALUES('row1',NULL);
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INSERT INTO connectby_tree VALUES('row2','row1');
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INSERT INTO connectby_tree VALUES('row3','row1');
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INSERT INTO connectby_tree VALUES('row4','row2');
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INSERT INTO connectby_tree VALUES('row5','row2');
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INSERT INTO connectby_tree VALUES('row6','row4');
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INSERT INTO connectby_tree VALUES('row7','row3');
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INSERT INTO connectby_tree VALUES('row8','row6');
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INSERT INTO connectby_tree VALUES('row9','row5');
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-- with branch
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SELECT * FROM connectby('connectby_tree', 'keyid', 'parent_keyid', 'row2', 0, '~') AS t(keyid text, parent_keyid text, level int, branch text);
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-- without branch
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SELECT * FROM connectby('connectby_tree', 'keyid', 'parent_keyid', 'row2', 0) AS t(keyid text, parent_keyid text, level int);
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-- test connectby with int based hierarchy
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DROP TABLE connectby_tree;
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CREATE TABLE connectby_tree(keyid int, parent_keyid int);
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INSERT INTO connectby_tree VALUES(1,NULL);
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INSERT INTO connectby_tree VALUES(2,1);
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INSERT INTO connectby_tree VALUES(3,1);
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INSERT INTO connectby_tree VALUES(4,2);
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INSERT INTO connectby_tree VALUES(5,2);
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INSERT INTO connectby_tree VALUES(6,4);
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INSERT INTO connectby_tree VALUES(7,3);
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INSERT INTO connectby_tree VALUES(8,6);
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INSERT INTO connectby_tree VALUES(9,5);
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-- with branch
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SELECT * FROM connectby('connectby_tree', 'keyid', 'parent_keyid', '2', 0, '~') AS t(keyid int, parent_keyid int, level int, branch text);
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-- without branch
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SELECT * FROM connectby('connectby_tree', 'keyid', 'parent_keyid', '2', 0) AS t(keyid int, parent_keyid int, level int);
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