146 lines
3.3 KiB
SQL
146 lines
3.3 KiB
SQL
-- ODBC.sql
|
|
--
|
|
|
|
--
|
|
-- Character string manipulation
|
|
--
|
|
|
|
--
|
|
-- Extensions for ODBC compliance in v7.0.
|
|
-- In the current driver, ODBC functions must map directly into a
|
|
-- Postgres function. So in some cases we must create a compatible
|
|
-- function.
|
|
--
|
|
|
|
-- truncate on the left
|
|
CREATE FUNCTION ltrunc(text, integer)
|
|
RETURNS text
|
|
AS 'SELECT substring($1 FROM 1 FOR $2)'
|
|
LANGUAGE 'SQL';
|
|
|
|
-- truncate on the right
|
|
CREATE FUNCTION rtrunc(text, integer)
|
|
RETURNS text
|
|
AS 'SELECT substring($1 FROM (char_length($1)-($2)+1) FOR $2)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION space(integer)
|
|
RETURNS text
|
|
AS 'SELECT lpad('''', $1, '' '')'
|
|
LANGUAGE 'SQL';
|
|
|
|
--
|
|
-- Mathematical functions
|
|
--
|
|
|
|
CREATE FUNCTION truncate(numeric,integer)
|
|
RETURNS numeric
|
|
AS 'SELECT trunc($1, $2)'
|
|
LANGUAGE 'SQL';
|
|
|
|
--
|
|
-- Date/time functions for v7.0
|
|
--
|
|
|
|
CREATE FUNCTION curdate()
|
|
RETURNS date
|
|
AS 'SELECT CAST(''now'' AS date)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION curtime()
|
|
RETURNS time
|
|
AS 'SELECT CAST(''now'' AS time)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION dayname(timestamp)
|
|
RETURNS text
|
|
AS 'SELECT to_char($1,''Day'')'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION dayofmonth(timestamp)
|
|
RETURNS integer
|
|
AS 'SELECT CAST(date_part(''day'', $1) AS integer)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION dayofweek(timestamp)
|
|
RETURNS integer
|
|
AS 'SELECT ( CAST(date_part(''dow'', $1) AS integer) + 1)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION dayofyear(timestamp)
|
|
RETURNS integer
|
|
AS 'SELECT CAST(date_part(''doy'', $1) AS integer)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION hour(timestamp)
|
|
RETURNS integer
|
|
AS 'SELECT CAST(date_part(''hour'', $1) AS integer)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION minute(timestamp)
|
|
RETURNS integer
|
|
AS 'SELECT CAST(date_part(''minute'', $1) AS integer)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION odbc_month(timestamp)
|
|
RETURNS integer
|
|
AS 'SELECT CAST(date_part(''month'', $1) AS integer)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION monthname(timestamp)
|
|
RETURNS text
|
|
AS 'SELECT to_char($1, ''Month'')'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION quarter(timestamp)
|
|
RETURNS integer
|
|
AS 'SELECT CAST(date_part(''quarter'', $1) AS integer)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION second(timestamp)
|
|
RETURNS integer
|
|
AS 'SELECT CAST(date_part(''second'', $1) AS integer)'
|
|
LANGUAGE 'SQL';
|
|
|
|
/*
|
|
-- The first argument is an integer constant denoting the units
|
|
-- of the second argument. Until we know the actual values, we
|
|
-- cannot implement these. - thomas 2000-04-11
|
|
CREATE FUNCTION timestampadd(integer,integer,timestamp)
|
|
RETURNS timestamp
|
|
AS 'SELECT CAST(($3 + ($2 * $1)) AS timestamp)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION timestampdiff(integer,integer,timestamp)
|
|
RETURNS timestamp
|
|
AS 'SELECT CAST(($3 + ($2 * $1)) AS timestamp)'
|
|
LANGUAGE 'SQL';
|
|
*/
|
|
|
|
CREATE FUNCTION week(timestamp)
|
|
RETURNS integer
|
|
AS 'SELECT CAST(date_part(''week'', $1) AS integer)'
|
|
LANGUAGE 'SQL';
|
|
|
|
CREATE FUNCTION year(timestamp)
|
|
RETURNS integer
|
|
AS 'SELECT CAST(date_part(''year'', $1) AS integer)'
|
|
LANGUAGE 'SQL';
|
|
|
|
--
|
|
-- System functions.
|
|
--
|
|
|
|
/*
|
|
CREATE FUNCTION database()
|
|
RETURNS text
|
|
AS 'SELECT ...'
|
|
LANGUAGE 'SQL';
|
|
*/
|
|
|
|
CREATE FUNCTION odbc_user()
|
|
RETURNS text
|
|
AS 'SELECT CAST(USER AS text)'
|
|
LANGUAGE 'SQL';
|
|
|