Create a existing SQL table valued function to Oracle - sql

Question

I have a table valued function created in SQL that gives me a list of values for each month based upon the dates passed as parameters. It works fine when I execute in SQL server but I need to create a similar function in Oracle as well. I am not familiar with Oracle code so could anyone please help in letting me know how to convert the function into an oracle function??
The function in SQL is as follows :
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER FUNCTION [dbo].[ES_REPORT_PSH_FISCALANALYSIS_FUNCTION]
(#P_AUTHORITY VARCHAR (100) = '',
#P_STARTDATE DATETIME = '',
#P_ENDDATE DATETIME = '',
#P_CLOSEDREASONS VARCHAR (100) = '',
#P_GRANTTYPES VARCHAR (100) = '')
RETURNS #RETURNTABLE TABLE(GRTYPE VARCHAR(100),
GRTYPEDESC VARCHAR(200),
TASK VARCHAR(100),
TASKDESC VARCHAR(100),
PERIODTEXT VARCHAR(100),
COUNT_DTRECD INT,
COUNT_DTSCHD INT,
COUNT_DTAPLMADE INT,
COUNT_DTAPPR INT,
COUNT_DTCMPLTD INT,
COUNT_DTCLOSED INT,
SUM_GRANTVALUE MONEY,
VAL_PAYMENTS MONEY)
AS
BEGIN
DECLARE #RETURNTABLE_1 TABLE
(
GRTYPE VARCHAR(100),
GRTYPEDESC VARCHAR(200),
TASK VARCHAR(100),
TASKDESC VARCHAR(100),
PERIODTEXT VARCHAR(100),
COUNT_DTRECD INT,
COUNT_DTSCHD INT,
COUNT_DTAPLMADE INT,
COUNT_DTAPPR INT,
COUNT_DTCMPLTD INT,
COUNT_DTCLOSED INT,
SUM_GRANTVALUE MONEY,
VAL_PAYMENTS MONEY
)
--populate default values;
declare #tmpDate DATETIME
declare #perText VARCHAR(100)
DECLARE #GTT_SPLIT_VALUES TABLE(ROW INT, VALUE VARCHAR(100))
INSERT INTO #GTT_SPLIT_VALUES SELECT ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) AS ROW,VAL FROM [DBO].[SPLITVALUES](#P_GRANTTYPES, ',')
DECLARE #counter INT = 1
DECLARE #max INT = (SELECT COUNT(*) FROM #GTT_SPLIT_VALUES)
DECLARE #thisGR VARCHAR(50)
DECLARE #thisGR1 VARCHAR(100)
WHILE #counter <= #max
BEGIN
SET #thisGR = (SELECT VALUE FROM #GTT_SPLIT_VALUES where ROW = #Counter)
SET #thisGR1 = (SELECT TOP 1 TASKDESC FROM PPV_GRANTS pv1 LEFT JOIN #GTT_SPLIT_VALUES pv on pv.VALUE = pv1.TASK where ROW = #Counter)
SET #tmpDate = #P_STARTDATE
WHILE (#tmpDate < #P_ENDDATE)
BEGIN
SET #perText = DATENAME(month, #tmpDate) + ' ' + DATENAME(year, #tmpDate)
INSERT INTO #RETURNTABLE select #thisGR,#thisGR,#thisGR,#thisGR1,#perText,0,0,0,0,0,0,0,0 from dual
SET #tmpDate = DATEADD(month, 1, #tmpDate)
END
SET #counter = #counter + 1
END
--logic in here
declare crGrants CURSOR for select PG.GRTYPE, PG.GRTYPEDESC,PG.TASK,PG.TASKDESC, PG.DTRECD, PG.DTSCHD, PG.DTAPLMADE, PG.DTAPPR, PG.DTCMPLTD,PG.DTCLOSED,PG.GRANTVALUE,PGP.VALUE,PGP.PAYMENTDATE
from dbo.PPV_GRANTS PG
LEFT JOIN PPV_GRANT_PAYMENTS PGP ON PGP.WORKID = PG.WORKID
order by PG.WORKID
declare #GRTYPE VARCHAR(4)
declare #GRTYPEDESC VARCHAR(50)
declare #TASK VARCHAR(100)
declare #TASKDESC VARCHAR(100)
declare #DTRECD DATETIME
declare #DTSCHD DATETIME
declare #DTAPLMADE DATETIME
declare #DTAPPR DATETIME
declare #DTCMPLTD DATETIME
declare #DTCLOSED DATETIME
declare #MONTHTXT VARCHAR(20)
declare #GRANTVALUE FLOAT
declare #Value FLOAT
declare #PaymentDate DATETIME
open crGrants
FETCH NEXT FROM crGrants INTO #GRTYPE, #GRTYPEDESC,#TASK,#TASKDESC, #DTRECD, #DTSCHD, #DTAPLMADE, #DTAPPR, #DTCMPLTD, #DTCLOSED,#GRANTVALUE, #Value, #PaymentDate
WHILE ##FETCH_STATUS = 0
BEGIN
IF (#DTRECD >= #P_STARTDATE AND #DTRECD <= #P_ENDDATE)
BEGIN
SET #perText = DATENAME(month, #DTRECD) + ' ' + DATENAME(year, #DTRECD)
UPDATE #RETURNTABLE SET COUNT_DTRECD = COUNT_DTRECD + 1
WHERE GRTYPE = #GRTYPE and PERIODTEXT = #perText
END
IF (#DTSCHD >= #P_STARTDATE AND #DTSCHD <= #P_ENDDATE)
BEGIN
SET #perText = DATENAME(month, #DTSCHD) + ' ' + DATENAME(year, #DTSCHD)
UPDATE #RETURNTABLE SET COUNT_DTSCHD = COUNT_DTSCHD + 1
WHERE GRTYPE = #GRTYPE and PERIODTEXT = #perText
END
IF (#DTAPLMADE >= #P_STARTDATE AND #DTAPLMADE <= #P_ENDDATE)
BEGIN
SET #perText = DATENAME(month, #DTAPLMADE) + ' ' + DATENAME(year, #DTAPLMADE)
UPDATE #RETURNTABLE SET COUNT_DTAPLMADE = COUNT_DTAPLMADE + 1
WHERE GRTYPE = #GRTYPE and PERIODTEXT = #perText
END
IF (#DTAPPR >= #P_STARTDATE AND #DTAPPR <= #P_ENDDATE)
BEGIN
SET #perText = DATENAME(month, #DTAPPR) + ' ' + DATENAME(year, #DTAPPR)
UPDATE #RETURNTABLE SET COUNT_DTAPPR = COUNT_DTAPPR + 1
WHERE GRTYPE = #GRTYPE and PERIODTEXT = #perText
END
IF (#DTCMPLTD >= #P_STARTDATE AND #DTCMPLTD <= #P_ENDDATE)
BEGIN
SET #perText = DATENAME(month, #DTCMPLTD) + ' ' + DATENAME(year, #DTCMPLTD)
UPDATE #RETURNTABLE SET COUNT_DTCMPLTD = COUNT_DTCMPLTD + 1
WHERE GRTYPE = #GRTYPE and PERIODTEXT = #perText
END
IF (#DTCLOSED >= #P_STARTDATE AND #DTCLOSED <= #P_ENDDATE)
BEGIN
SET #perText = DATENAME(month, #DTCLOSED) + ' ' + DATENAME(year, #DTCLOSED)
UPDATE #RETURNTABLE SET COUNT_DTCLOSED = COUNT_DTCLOSED + 1
WHERE GRTYPE = #GRTYPE and PERIODTEXT = #perText
END
IF (#DTAPPR >= #P_STARTDATE AND #DTAPPR <= #P_ENDDATE)
BEGIN
SET #perText = DATENAME(month, #DTAPPR) + ' ' + DATENAME(year, #DTAPPR)
UPDATE #RETURNTABLE SET SUM_GRANTVALUE = #GRANTVALUE
WHERE GRTYPE = #GRTYPE and PERIODTEXT = #perText
END
IF (#PaymentDate >= #P_STARTDATE AND #PaymentDate <= #P_ENDDATE)
BEGIN
SET #perText = DATENAME(month, #PaymentDate) + ' ' + DATENAME(year, #PaymentDate)
UPDATE #RETURNTABLE SET VAL_PAYMENTS = #Value
WHERE GRTYPE = #GRTYPE and PERIODTEXT = #perText
END
FETCH NEXT FROM crGrants INTO #GRTYPE, #GRTYPEDESC,#TASK,#TASKDESC, #DTRECD, #DTSCHD, #DTAPLMADE, #DTAPPR, #DTCMPLTD, #DTCLOSED , #GRANTVALUE , #Value , #PaymentDate
END
close crGrants
deallocate crGrants
--result set
RETURN
END