Stored procedure couldn't execute the entire statement in sybase - sql-server

Question

I have created a stored procedure in Sybase using interactive sql which compares two rows from two tables with same structure and if there is any difference in any column's data of the table then it returns that particular row.
Stored procedure is written as below:
CREATE or replace PROCEDURE Validation
#databaseTo SYSNAME,
#tableTo SYSNAME,
#tableFrom SYSNAME
AS
BEGIN
DECLARE #stmt NVARCHAR(10000)
DECLARE #columnName VARCHAR(100)
DECLARE #nameList VARCHAR(8000)
select #nameList=""
select #stmt=""
select #columnName=""
SET NOCOUNT ON
DECLARE c1 cursor
for select name
from syscolumns
where id=(select id
from sysobjects
where name=#tableFrom)
OPEN c1
FETCH c1
INTO #columnName
while( ##sqlstatus!=2)
BEGIN
if(#columnName!= "rqst_id")
BEGIN
select #nameList=#nameList+"a."+#columnName+"= b."+#columnName+" AND "
END
FETCH c1
INTO #columnName
END
close c1
select #nameList=#nameList+"a.rqst_id=b.rqst_id"
PRINT #nameList
PRINT #tableFrom
select #stmt='select a.* from '+ #tableFrom+' a LEFT JOIN '+ #databaseTo+'.dbo.'+#tableTo+' b on '+ #nameList+' where b.rqst_id IS NULL'
PRINT #stmt
EXEC #stmt
END
this stored procedure compiles properly but when executed using below statement
EXEC dbo.Validation ('fr2015_dev','fr300output_cost','fr300output_cost')
I get this error
"Couldn't execute statement
Stored procedure 'select a.* from fr300output_cost a LEFT JOIN fr2015_dev.dbo.fr300output_cost b on a.carrier_id= b.carrier_id AND
a.rec_num= b.rec_num AND a.amenity_cost= b.amenity_cost AND
a.circuity_cost= b.circuity_cost AND a.lost_utilization_cost=
b.lost_utilization_cost AND a.dest_fuel_cost= b.dest_fuel_cost AND
a.future_stop_cost= b.future_stop_cost AND a.s' not found.
...
sp_help may produce lots of outputs.
sybase error code 2812"
I see this proc on running 'sp_help'.Please help me solving this problem .

Answer 1

This way
EXEC #stmt
you run a procedure so this the reason for your error.
For run dynamic sql you have to use parenthesis as below
EXEC (#stmt)
your full code should be
CREATE or replace PROCEDURE Validation
#databaseTo SYSNAME,
#tableTo SYSNAME,
#tableFrom SYSNAME
AS
BEGIN
DECLARE #stmt NVARCHAR(10000)
DECLARE #columnName VARCHAR(100)
DECLARE #nameList VARCHAR(8000)
select #nameList=""
select #stmt=""
select #columnName=""
SET NOCOUNT ON
DECLARE c1 cursor
for select name
from syscolumns
where id=(select id
from sysobjects
where name=#tableFrom)
OPEN c1
FETCH c1
INTO #columnName
while( ##sqlstatus!=2)
BEGIN
if(#columnName!= "rqst_id")
BEGIN
select #nameList=#nameList+"a."+#columnName+"= b."+#columnName+" AND "
END
FETCH c1
INTO #columnName
END
close c1
select #nameList=#nameList+"a.rqst_id=b.rqst_id"
PRINT #nameList
PRINT #tableFrom
select #stmt='select a.* from '+ #tableFrom+' a LEFT JOIN '+ #databaseTo+'.dbo.'+#tableTo+' b on '+ #nameList+' where b.rqst_id IS NULL'
PRINT #stmt
EXEC (#stmt)
END