User Tools

Site Tools


support_functions

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
Last revision Both sides next revision
support_functions [2012/06/18 00:37]
daniel
support_functions [2017/05/26 13:46]
daniel [get_header_line()]
Line 1: Line 1:
-====== tag_path(): extract the tag name with its hierarchy ​======+====== tag_path(int) ====== 
 +**Extract the tag name with its hierarchy.** \\
 This recursive function takes the ID of a tag and returns its full name, including its hierarchy. This recursive function takes the ID of a tag and returns its full name, including its hierarchy.
  
Line 27: Line 28:
 will retrieve all tags sorted and formatted as in the "​Current messsages"​ tree in the Quick selection panel of the user interface. will retrieve all tags sorted and formatted as in the "​Current messsages"​ tree in the Quick selection panel of the user interface.
  
-====== tag_depth(): returns ​the depth of a tag inside its hierarchy ​======+ 
 +====== tag_depth(int ​====== 
 +**Returns ​the depth of a tag inside its hierarchy**. \\
 This recursive function takes the ID of a tag and returns its depth inside its hierarchy, starting by 1 for top-level tags. This recursive function takes the ID of a tag and returns its depth inside its hierarchy, starting by 1 for top-level tags.
  
Line 49: Line 52:
 </​file>​ </​file>​
  
-====== ​get_header_line(): extracts entries ​from a mail header ​======+====== ​tag_id(text====== 
 +**Returns the ID of a tag from its full hierarchical name (case insensitive).** \\ 
 +This is the inverse function of tag_path(int). 
 +If the name is not found, it returns null. 
 +<file sql tag_id.sql>​ 
 +CREATE OR REPLACE FUNCTION tag_id(in_tag_path text) RETURNS integer AS  
 +$$ 
 +DECLARE 
 + id INTEGER:=null; 
 + ​component text; 
 +BEGIN 
 +  FOR component IN SELECT regexp_split_to_table(in_tag_path,​ '​->'​) 
 +  LOOP 
 +    SELECT tag_id FROM tags WHERE upper(NAME)=upper(component) AND parent_id is not distinct ​from id 
 +      INTO id;     
 +  END LOOP; 
 +  RETURN id; 
 +END; 
 +$$ LANGUAGE plpgsql STABLE STRICT; 
 +</​file>​ 
 + 
 +====== ​get_header_line() ====== 
 +**Extract entries from a mail header.** \\
 This function takes a mail_id and the name of a header field and returns all corresponding header entries for this message. This function takes a mail_id and the name of a header field and returns all corresponding header entries for this message.
  
Line 55: Line 80:
 CREATE FUNCTION get_header_line(int,​ text) RETURNS SETOF text CREATE FUNCTION get_header_line(int,​ text) RETURNS SETOF text
 AS $$ AS $$
- ​SELECT (regexp_matches(lines, ​E'​^'​||$2||':​ (.*?​)$',​ '​gni'​))[1]+ ​SELECT (regexp_matches(lines,​ '​^'​||$2||':​ (.*?​)$',​ '​gni'​))[1]
    FROM header WHERE mail_id=$1;    FROM header WHERE mail_id=$1;
 $$ LANGUAGE sql; $$ LANGUAGE sql;
  
 </​file>​ </​file>​
support_functions.txt · Last modified: 2018/04/20 13:17 by daniel