mysql insert statement as a variable [duplicate] - mysql

Question

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How To have Dynamic SQL in MySQL Stored Procedure
(3 answers)
Closed 8 years ago.
is it possible to set a variable to an insert statement in a stored procedure?
Something like:
set variable1 = insert into table(field1, field2, field3) values(val1, val2, variable2);
If so, how should it be written?
I keep throwing errors and documentation in the wild is inconclusive.
I was going for brevity but the entire procedure is thus:
-- --------------------------------------------------------------------------------
-- Routine DDL
-- Note: comments before and after the routine body will not be stored by the server
-- --------------------------------------------------------------------------------
DELIMITER $$
CREATE DEFINER=`root`#`localhost` PROCEDURE `new_accession`(in barcode int, in accepted varchar(11), in wt float(11,2), in wtunit varchar(3),in draw date, in chist varchar(256), in ghist varchar(256), in meds varchar(256), in diffdiag varchar(256),in diseasesus varchar(256),in volume int, in facility int, in patient int, in employ int, in compromised int, in receiving int, in test int)
BEGIN
declare accessionId int;
declare accessionTest int;
declare tkInsert varchar(256);
declare hptInsert varchar(256);
declare calInsert varchar(256);
declare pthInsert varchar(256);
declare vitdtkInsert varchar(256);
declare cnpInsert varchar(256);
if wtunit = 'lb' then set wt = convertLbKg(wt);
end if;
INSERT INTO accession(barcode_accession,accepted_accession,weight_accession,req_weight_units,draw_date_accession,cancer_history_accession,general_history_accession,medication_accession,differential_diagnosis_accession,disease_suspect_accession,volume_accession,facility_doctor_index_id_facility_doctor_index,patient_id_patient,employee_id_employee,accession_compromised_id_accession_compromised,receiving_id,accession_typeof_id_accession_typeof)
VALUES (barcode,accepted,wt,wtunit,draw,chist,ghist,meds,diffdiag,diseasesus,volume,facility,patient,employ,compromised,receiving,1);
set accessionId = last_insert_id();
set tkInsert = insert into pending(accession_facility_index,reagent_type,`status`)values(accessionId,1,'Pending');
set hptInsert = insert into pending(accession_facility_index,reagent_type,`status`)values(accessionId,2,'Pending');
set calInsert = insert into pending(accession_facility_index,reagent_type,`status`)values(accessionId,3,'Pending');
set pthInsert = insert into pending(accession_facility_index,reagent_type,`status`)values(accessionId,4,'Pending');
if test = 1 then tkInsert,calInsert;
elseif test =2 the hptInsert,pthInsert;
else pthInsert;
end if;
END

Answer 1

It is not very clear what you want but if your goal is to store insert's outcome (affected rows) you could use ROW_COUNT().
ROW_COUNT() returns the number of rows changed, deleted, or inserted
by the last statement if it was an UPDATE, DELETE, or INSERT.
For other statements, the value may not be meaningful.
For example:
variable1 = (select ROW_COUNT());

Answer 2

I think you're looking for prepared statements.
PREPARE tkInsert FROM CONCAT("insert into pending(accession_facility_index,reagent_type,`status`)values(?, 1,'Pending')";
Then you execute it with:
EXECUTE tkInsert USING accessionId;