PL/SQL update based on flag - plsql

I have a table "flags" containing flags with "name" and "value" where "name" is the name of the flag and "value" is either 'T' or 'F'
I would like to update a table based on a flag with name 'enable_feature' in the following manner:
BEGIN;
IF ((SELECT flags.value FROM flags WHERE flags.name = 'enable_feature') = 'T')
UPDATE... SET...;
ELSE
UPDATE... SET...;
END IF;
END;
My trouble seems to be in the IF statement. Specifically, i get the following error:
PLS-00103: Encountered the symbol "SELECT" when expecting one of the
following:
( - + case mod new not null continue avg count current
exists max min prior sql stddev sum variance execute forall merge
time timestamp interval date pipe
How do I modify this statement such that I can perform an UPDATE/SET statement based on the value of 'enable_feature' (The UPDATE/SET statement is on a different table)

DECLARE
v flags.value%type;
BEGIN
SELECT flags.value into v FROM flags WHERE flags.name = 'enable_feature';
IF v = 'T' THEN
UPDATE... SET...;
ELSE
UPDATE... SET...;
END IF;
END;

Related

Assign variable error if 'no rows selected' from query

I want to assign a variable from the sale of today by the menu item input. If the menu item has been sold yet, the variable should return 0. But it showed error instead:
Error report -
SQL Error: ORA-00905: missing keyword
00905. 00000 - "missing keyword"
This is my code:
SELECT SUM(Selling_Price*Quantity_Sold)
INTO V_Today_Sale
FROM Bill_Item BI, Bill B
WHERE BI.Bill_Number = B.Bill_Number AND
Menu_Item_Number = 1 AND
Bill_Date = sysdate AND
(NVL(Paid_YN,'N') = 'Y' OR NVL(Posted_YN,'N') = 'Y')
GROUP BY Menu_Item_Number
ORDER BY Menu_Item_Number;
If I remove the variable assignment
SELECT SUM(Selling_Price*Quantity_Sold)
FROM Bill_Item BI, Bill B
WHERE BI.Bill_Number = B.Bill_Number AND
Menu_Item_Number = 1 AND
Bill_Date = sysdate AND
(NVL(Paid_YN,'N') = 'Y' OR NVL(Posted_YN,'N') = 'Y')
GROUP BY Menu_Item_Number
ORDER BY Menu_Item_Number;
the result will be:
no rows selected
It's correct since no sale has been made for today yet. But how can I make the query return 0 instead of no rows selected so that I can assign it to the variable?
Are you running the query as shown to test without putting it in a block (using PL/SQL or Toad)? If so, you need to define the variable and structure like this, with a call to NVL() around the SUM() call so V_Today_Sale gets a value if both inputs to SUM() are NULL, and add an exception to catch the NO_DATA_FOUND condition that sets V_Today_Sale to 0 if the where clause conditions are not met:
SET SERVEROUTPUT ON;
DECLARE
V_Today_Sale number := 0;
BEGIN
SELECT NVL(SUM(Selling_Price*Quantity_Sold), 0)
INTO V_Today_Sale
FROM Bill_Item BI, Bill B
WHERE BI.Bill_Number = B.Bill_Number AND
Menu_Item_Number = 1 AND
Bill_Date = sysdate AND
(NVL(Paid_YN,'N') = 'Y' OR NVL(Posted_YN,'N') = 'Y')
GROUP BY Menu_Item_Number
ORDER BY Menu_Item_Number;
EXCEPTION
WHEN NO_DATA_FOUND THEN
V_Today_Sale :=0;
END;
DBMS_OUTPUT.PUT_LINE(V_Today_Sale);

When using CAST in plsql case, showing error

I want to put single clob data column value in 2 varchar2 columns by checking the length of CLOB column, but i am getting error in case statement, line is marked in * *, it says syntex error , what am i doing wrong
DECLARE
v_tot_rows NUMBER (3);
rqst_xml_1 ISG.CERT_TEST_CASE_GTWY_TXN.RQST_XML_1_TX%TYPE;
rqst_xml_2 ISG.CERT_TEST_CASE_GTWY_TXN.RQST_XML_2_TX%TYPE;
CURSOR req_res_populate_cur
IS
SELECT scptc.SWR_CERT_PRJCT_TEST_CASE_ID,
orb_txn.MIME_HEAD_TX,
orb_txn.RSPNS_XML_TX,
orb_msg.RQST_GNRL_VLD_JSON_TX,
orb_msg.RQST_TEST_CASE_VLD_JSON_TX,
orb_msg.MRCH_ID
(
CASE
WHEN DBMS_LOB.GETLENGTH (orb_txn.RQST_XML_TX) <= 4000 THEN
rqst_xml_1 := CAST ( orb_txn . RQST_XML_TX AS VARCHAR2 ( 4000 ) ) * ,
rqst_xml_2 := ''
WHEN DBMS_LOB.GETLENGTH(orb_txn.RQST_XML_TX)>4000 THEN
rqst_xml_1:=CAST(substr(orb_txn.RQST_XML_TX,1,4000) AS VARCHAR2(4000)),
rqst_xml_2:=CAST(substr(orb_txn.RQST_XML_TX,4001)
END
)
FROM ISG.online_messages msg
JOIN ISG.SWR_CERT_PRJCT_TEST_CASE scptc
ON msg.online_message_id = scptc.TXN_ID,
ISG.GTWY_PLTFM_TXN_MSG orb_msg
JOIN ISG.GTWY_PLTFM_TXN orb_txn
ON orb_msg.GTWY_PLTFM_TXN_ID = orb_txn.GTWY_PLTFM_TXN_ID
WHERE msg.SPEC_ID = 60;;
BEGIN
FOR req_res IN req_res_populate_cur
LOOP
DBMS_OUTPUT.PUT_LINE (req_res.SWR_CERT_PRJCT_TEST_CASE_ID,
req_res.MIME_HEAD_TX,
req_res.rqst_xml_1,
req_res.rqst_xml_2,
req_res.RSPNS_XML_TX,
req_res.RQST_GNRL_VLD_JSON_TX,
req_res.RQST_TEST_CASE_VLD_JSON_TX,
req_res.MRCH_ID);
END LOOP;
END;
Your problem is your invalid SELECT-statement. You're trying to set variables (of your plsql-block) within a query. That's not intended or allowed.
You need to select the values into columns. Here i added two columns. One for each xml-value.
SELECT scptc.SWR_CERT_PRJCT_TEST_CASE_ID,
orb_txn.MIME_HEAD_TX,
orb_txn.RSPNS_XML_TX,
orb_msg.RQST_GNRL_VLD_JSON_TX,
orb_msg.RQST_TEST_CASE_VLD_JSON_TX,
orb_msg.MRCH_ID,
CASE --Column-Start
WHEN DBMS_LOB.GETLENGTH (orb_txn.RQST_XML_TX) <= 4000
THEN
CAST (orb_txn.RQST_XML_TX AS VARCHAR2 (4000))
WHEN DBMS_LOB.GETLENGTH (orb_txn.RQST_XML_TX) > 4000
THEN
CAST (
SUBSTR (orb_txn.RQST_XML_TX, 1, 4000) AS VARCHAR2 (4000))
END
AS my_rqst_xml_1, -- Column-End. In this column you'll have the value for xml_1
CASE --Column-Start
WHEN DBMS_LOB.GETLENGTH (orb_txn.RQST_XML_TX) <= 4000
THEN
''
WHEN DBMS_LOB.GETLENGTH (orb_txn.RQST_XML_TX) > 4000
THEN
CAST (SUBSTR (orb_txn.RQST_XML_TX, 4001) AS VARCHAR2 (4000))
END
AS my_rqst_xml_2 -- Column-End. In this column you'll have the value for xml_12
FROM ISG.online_messages msg
JOIN ISG.SWR_CERT_PRJCT_TEST_CASE scptc
ON msg.online_message_id = scptc.TXN_ID,
ISG.GTWY_PLTFM_TXN_MSG orb_msg
JOIN ISG.GTWY_PLTFM_TXN orb_txn
ON orb_msg.GTWY_PLTFM_TXN_ID = orb_txn.GTWY_PLTFM_TXN_ID
WHERE msg.SPEC_ID = 60
Afterwards you can work with the result and get the values from it.
BEGIN
FOR req_res IN req_res_populate_cur
LOOP
DBMS_OUTPUT.PUT_LINE (req_res.SWR_CERT_PRJCT_TEST_CASE_ID,
req_res.MIME_HEAD_TX,
req_res.my_rqst_xml_1, -- here we can see the values
req_res.my_rqst_xml_2, -- here too
req_res.RSPNS_XML_TX,
req_res.RQST_GNRL_VLD_JSON_TX,
req_res.RQST_TEST_CASE_VLD_JSON_TX,
req_res.MRCH_ID);
-- And here we could store the values into variables or call some procedures etc.
rqst_xml_1 := req_res.my_rqst_xml_1;
rqst_xml_2 := req_res.my_rqst_xml_2;
END LOOP;
END;
I've to guess, but it seems you didn't want to declare the variables:
rqst_xml_1 ISG.CERT_TEST_CASE_GTWY_TXN.RQST_XML_1_TX%TYPE;
rqst_xml_2 ISG.CERT_TEST_CASE_GTWY_TXN.RQST_XML_2_TX%TYPE;
This would be only needed if you want to work with the values.

using nested table as in Parameter to a Procedure

I have a table T1 and I want to insert multiple rows at a time through a procedure using collection. I have written the code but when I'm trying to execute it throws an error. Please advise.
create table t1 ( id number , name varchar2(10));
/
create or replace PACKAGE PKG1 AS
TYPE TAB_LIST IS TABLE OF T1%ROWTYPE;
PROCEDURE PROC1 (p_val IN TAB_LIST);
END PKG1;
/
create or replace PACKAGE BODY PKG1 AS
PROCEDURE PROC1 (P_VAL IN TAB_LIST
)
IS
BEGIN
FOR i IN p_val.FIRST..p_val.LAST
LOOP
insert INTO T1
(
id, name
)
VALUES
(
p_val(i).id,
p_val(i).name
);
END LOOP;
END;
END;
error after executing
DECLARE
p_val PKG1.TAB_LIST;
BEGIN
p_val := PKG1.TAB_LIST(123,'XYZ');
END;
Error report -
ORA-06550: line 5, column 11:
PLS-00306: wrong number or types of arguments in call to 'TAB_LIST'
ORA-06550: line 5, column 11:
PLS-00306: wrong number or types of arguments in call to 'TAB_LIST'
ORA-06550: line 5, column 2:
PL/SQL: Statement ignored
06550. 00000 - "line %s, column %s:\n%s"
*Cause: Usually a PL/SQL compilation error.
*Action:
DECLARE
P_VAL PKG1.TAB_LIST := PKG1.TAB_LIST();
BEGIN
P_VAL.extend;
P_VAL(1).id := 123;
P_VAL(1).name := 'XYZ';
PKG1.PROC1( P_VAL );
END;
example for multiple records:
DECLARE
P_VAL PKG1.TAB_LIST := PKG1.TAB_LIST();
BEGIN
for i in 1 .. 10
loop
P_VAL.extend;
P_VAL(P_VAL.LAST).id := i;
P_VAL(P_VAL.LAST).name := 'XYZ' || i;
end loop;
PKG1.PROC1( P_VAL );
END;
#hekko": its not a string .sorry about formatting . The multiple values (n) can be passed from application like this and all should be inserted into table at once.
123 'XYZ'
456 'DFK'
866 'HKK'
#Kaushik :it is not a string but formatting issue.. the question remains the same "I have a table T1 and I want to insert multiple rows at a time through a procedure using collection.

Conversion failed when converting the nvarchar value 'B' to data type int

Getting this error when ever I tried to execute the entire procedure. Below is the piece of code from the procedure.
SELECT
DISTINCT SUBSTRING (a.GL06001,19,10) as ProjectNo,
--PR01040 UD_10,
SUBSTRING (a.GL06001,1,8) as AccountNo,
a.GL06002 as TransNo,
a.GL06004 as TransAmount,
a.GL06003 as TransDate,
a.GL06005 as TransDesc,
'GL' as SourceType,
' ' as ResourceCode,
' ' as TransLine,
0 as CostPR,
'000000' as PRTransNo,
a.GL06027 as SubprojNo,
a.GL06028 as ActiLineNo,
a.GL06012 as TransType,
a.GL06016 as Counter
from ScalaMX.dbo.GL06PA17 a where a.GL06003 between '2017-02-21 00:00:00.000' and '2017-03-01 00:00:00.000'
There are actually 18000+ rows and 15 columns. Any hint on how to track which column has B value?
I downloaded the result in Excel and ctrl+f 'B' But still no clue and I couldn't find it.
convert into stored procedure, see below sample
declare
n integer;
m integer;
begin
for i in ( select primarykeycolumn, a,b from table )
loop
begin
n := i.a;
m := i.b;
exception
when others then
dbms_output.put_line(i.primarykeycolumn);
end
end loop;
end;
When conversion error happens it will catch the exception hence find the primary key.

Evaluating string/combination of variables as logical expression in oracle pl/sql

In my Pl/Sql code , I have three variables v_var1 , v_operand , v_var2 whose values are populated based on some logic (v_var1 & v_var2 can be date , number , varchar. Associated Operand will be according to data type only). A sample would be
v_var1 = 10 , v_operand = '=' , v_var2 = 20.
Based on these value , I have to evaluate whether the condition "v_var1 -v_operand- v_var2"is true or false.
Ex :- with above values, I have to evaluate whether 10 equals 20 or not.
How can I achieve this ? Can I pass the whole string as '10 = 20' to some function and get the result as false?
One way I can think of is to write CASE statements for evaluating but can there be a better way ?
You could use dynamic SQL to do the evaluation as a filter on the dual table:
declare
v_var1 varchar2(10) := '10';
v_operand varchar2(10) := '=';
v_var2 varchar2(10) := '20';
l_result number;
begin
execute immediate 'select count(*) from dual where :var1 ' || v_operand || ' :var2'
into l_result using v_var1, v_var2;
if l_result = 1 then
dbms_output.put_line('True');
else
dbms_output.put_line('False');
end if;
end;
/
PL/SQL procedure successfully completed.
False
If the condition is true the count will get 1, otherwise it will get 0, and you can then test that via the local variable you select the count into.
Holding dates and numbers as strings isn't ideal, even temporarily, but might be OK as long as you convert to/from the real data types consistently, e.g. always explicitly converting dates with to_date and to_char and specifying the format masks.

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