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Merge pull request alecthomas#149 from kenshaw/fix-dollar-strings
Fix Dollar-Quoted Strings (postgres + cql)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| # about | ||
|
|
||
| ## user defined function in cql | ||
|
|
||
| ```javascript | ||
| column.substring(0,num) | ||
| ``` | ||
|
|
||
| ```cql | ||
| CREATE FUNCTION IF NOT EXISTS cycling.left (column TEXT,num int) | ||
| RETURNS NULL ON NULL INPUT | ||
| RETURNS text | ||
| LANGUAGE javascript AS $$ | ||
| column.substring(0,num) | ||
| $$; | ||
|
|
||
| CREATE OR REPLACE FUNCTION cycling.fLog (input double) | ||
| CALLED ON NULL INPUT | ||
| RETURNS double LANGUAGE java AS | ||
| 'return Double.valueOf(Math.log(input.doubleValue()));'; | ||
| ``` | ||
|
|
||
| ```postgres | ||
| DROP TABLE IF EXISTS emp CASCADE; | ||
|
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| CREATE TABLE emp ( | ||
| empname text, | ||
| salary integer, | ||
| last_date timestamp, | ||
| last_user text | ||
| ); | ||
|
|
||
| select | ||
| $my_tag$aoeuaoeu$my_tag$ as blah | ||
| ; | ||
|
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| CREATE OR REPLACE FUNCTION emp_stamp() RETURNS trigger AS $emp_stamp$ | ||
| BEGIN | ||
| -- Check that empname and salary are given | ||
| IF NEW.empname IS NULL THEN | ||
| RAISE EXCEPTION 'empname cannot be null'; | ||
| END IF; | ||
| IF NEW.salary IS NULL THEN | ||
| RAISE EXCEPTION '% cannot have null salary', NEW.empname; | ||
| END IF; | ||
|
|
||
| -- Who works for us when she must pay for it? | ||
| IF NEW.salary < 0 THEN | ||
| RAISE EXCEPTION '% cannot have a negative salary', NEW.empname; | ||
| END IF; | ||
|
|
||
| -- Remember who changed the payroll when | ||
| NEW.last_date := current_timestamp; | ||
| NEW.last_user := current_user; | ||
| RETURN NEW; | ||
| END; | ||
| $emp_stamp$ LANGUAGE plpgsql; | ||
|
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| CREATE TRIGGER emp_stamp BEFORE INSERT OR UPDATE ON emp | ||
| FOR EACH ROW EXECUTE PROCEDURE emp_stamp(); | ||
|
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| DO language plpgsql $$ | ||
| declare r record; | ||
| begin | ||
| for r in select * from books | ||
| loop | ||
| execute 'select ''' || r.title || ''''; | ||
| end loop; | ||
| end | ||
| $$; | ||
|
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||
| DO $$ | ||
| declare r record; | ||
| begin | ||
| for r in select * from books | ||
| loop | ||
| execute 'select ''' || r.title || ''''; | ||
| end loop; | ||
| end | ||
| $$; | ||
| ``` |
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