Plpgsql select into variable. Store query result in a PL/pgSQL variable.

Plpgsql select into variable PL/pgSQL variables can be any Amazon Redshift supported data type, plus RECORD and refcursor. 1. Your select into statement will turn into something like: SELECT COUNT(*) INTO FROM emp_ because the value of v_num_of_employees is null at EXECUTE IMMEDIATE. The SQL standard uses SELECT INTO to represent selecting values into scalar variables of a host program, rather than creating a new table. I found a difference in applying SELECT INTO in Oracle and other SQL databases. Modified 9 years, 3 months ago. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog In the declaration section, we declare a variable film_count and initialize its value to zero. PL/pgSQL supports various data types for variables, including the standard SQL data types and custom types defined in your database. The following code does the job for scalars (but fails with arrays): SELECT col_a, Postgres plpgsql: Is a view better than a select query in a plpgsql function. The PostgreSQL usage of SELECT INTO to represent table creation is historical. In pure SQL style, I could do something like the following: // here declaring function and etc DECLARE cnt INTEGER; EXECUTE 'SELECT COUNT(*) FROM t' INTO cnt; How to achieve the same functionality in the form of a PL/pgSQL function? We use the select into statement to retrieve from the film_title column of the film table and assign it to the film_title variable. 3 LOOP dbms_output. Hot Network Questions We can do the same thing in the form of a function as well: CREATE OR REPLACE FUNCTION get_all_children(start_id int) RETURNS INT[] LANGUAGE plpgsql AS $$ DECLARE childrenRet INT[]; BEGIN WITH RECURSIVE cte01 (children, lev) AS ( SELECT a1. I have written a Postgres anonymous block. DECLARE table_holder my_table; --the type of table_holder is my_table; result text; BEGIN SELECT * INTO table_holder FROM table_holder ; result = another_function(table_holder); return result; END In your second example :into_bind in v_query_str is just a placeholder for value of variable v_num_of_employees. f3 FROM The OUT parameters are variables that you can use in a SELECT INTO statement. foo() RETURNS void LANGUAGE plpgsql AS $$ DECLARE x int; y int; BEGIN SELECT 1 INTO x, y; SELECT 1, 2 INTO x, y; SELECT 1, 2, 3 INTO x, y; END; $$; SELECT foo(); WARNING: number of source and target fields in assignment does not match DETAIL: There are few errors on what you're tryng to do: sql is declarative language so you're asking what to do not how to do and this is for this reason that you cannot store variables and some statements like declare and begin-end should be used in trigger and not in a simple query. table or variable or perhaps a record. Ask Question Asked 4 years, 9 months ago. CREATE TYPE my_type AS (f1 varchar(10), f2 varchar(10) /* , */ ); CREATE OR REPLACE FUNCTION get_object_fields(name text) RETURNS my_type AS $$ DECLARE result_record my_type; BEGIN SELECT f1, f2, f3 INTO result_record. INSERT INTO othertab(id) SELECT id FROM other tab I used a qualified name and prefixes to reduce a risk of conflict between SQL identifiers and PL/pgSQL variables. Your code is really hard to read, incomplete and there are some substantial syntax errors which stem from e. Something like below worked for me. *, a. Eg. Executing Dynamic Commands in the documentation has all the details you need. Executing SQL Commands 41. put_line(var(I)); END SELECT auc_user_insert(:'username', :'emailadr', :'password') AS oid; \gset SELECT auc_user_select(:oid); SELECT auc_user_delete(:oid); \gset is a new meta-command since psql 9. Then you can use select . Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog You can use select into pattern, and you can't have a "select *" query in a DO function - it is not meant to return a query. Expressions 41. user_list integer[] = (select array_agg(user_id) from users where state = 'ACTIVE'); That being said this IMHO doesn't really help you with creating your materialized views. attrelid JOIN pg_constraint cn ON cn. As explained above, the expression in such a statement is evaluated by means of an SQL SELECT command sent to the main database engine. use concat function postgresql. - The INTO keyword is used to specify the selected row into the “emp_info” variable. What happens if the following select results in several posts? SELECT @PrimaryContactKey = c. The difference is small for a condition on a unique column: only one I'm in the process of learning postgres, I've already found a work around to this problem but I wanted to ask the community if something like this is even possible, maybe my syntax is just off. portal left outer join a. 0. ; Second, use the SELECT INTO statement to assign the number of actors to the actor_count. Makes a big difference with big tables. family_id = OLD. Then I just have to select distinct the id's and count them. SELECT extract Behind the curtains, every assignment in plpgsql is a separate SELECT (very basic and fast, but still). Use the SELECT INTO statement to I am trying to save the result of a SELECT query, pass it, and reuse it in another PL/pgSQL function:. These row variables can hold the entire row returned by the select into or for statement. 6. 3. NEXTVAL INTO LN_TMP FROM DUAL; RETURN LN_TMP; END WBAR_TEST_2; I think that second approach is plpgsql, variable inside query in function. conrelid = c. Modified 6 years, 3 months ago. ; you are executing two statements: select and insert into and they are executed one Dynamic SQL should be generated through format() and parameters should not be passed as string literals, but through placeholders and using. PL/pgSQL SELECT INTO Statement Examples # Let’s explore some examples of using the SELECT INTO statement. Processing rows create or replace function test() returns void() as $$ declare a int; begin select more_than_one_value into a from my_table; -- do some other job using a end; $$ language plpgsql; When calling this function, only one row is selected because select into pass only one value to a , even though column more_than_one_value has many values. Basic Statements 41. Step 4. I have a table called foo and a function that inserts data to it called You need to define a new type and define your function to return that type. foo means the variable even if there is a column foo in src. So the following code might still contain some Also, the SELECT INTO you're using looks like PostgreSQL for copying rows into a table. Viewed 27k times You cannot use SELECT without INTO clause in PL/SQL. adnum AND at. You can use SELECT INTO to assign a previously declared variable within a stored procedure or a RECORD type variable. invckey = @tmp_key To write procedural code and use variables with PostgreSQL, the most common way is to use the plpgsql language, in a function or in a DO block. Assuming the legal name you implied at the top: insert_reply_to_uid. 224. PLpgSQL is careful about useless SELECT statements - the SELECT without INTO clause is not allowed. Declare all variables in a block, except for loop variables, in the block's DECLARE section. - A record-type variable named “emp_info” is declared. Follow edited Apr 21, 2022 at 9:00. 23 select * from foo(); ERROR: relation "footable" already exists CONTEXT: SQL statement "create temporary table footable as select * from some_table" PL/pgSQL function "foo" line 1 at SQL statement So, how can I temporarily cache the results of a query in a variable, for use later on in my stored proc? To store the result of a query into a variable, you need to declare a variable. Improve this answer. person_id = my_person_id) THEN -- do something END IF; . - The FROM clause keeps the name of the targeted table, i. txt'; In a plpgsql function you should use execute command to select a value of Tip: Note that this interpretation of SELECT with INTO is quite different from PostgreSQL's regular SELECT INTO command, wherein the INTO target is a newly created table. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company @BarryPrentiss - not quite sure what sure what you mean. In the end I've got a big array with alle the related user id's. foo; IF total_num > 0 AND total_width > 100 THEN You can use a record type to do that. INTO to assign your variable like this: See documentation here. vvvvv. For supported data types, see Data types. To select into a variable from an execute statement: You got some good answers downthread but the key with arrays in pl/pgsql is to avoid iterative processing whenever possible, *especially* when building the array. In plpgsql when we assign to a array variable, we need not use the type casting. Share. I can only run the query twice, with the first one do the count and if the count is zero, set the variable to null, and if the count is 1, select into the variable. attrelid = ad. Too bad now I have a problem with the next line. 31. This is useful for things like injecting constant values where a select is providing the input to an insert table when copying from a staging table. Executing a Command with a Single-Row Result 41. I have created a function that creates a temporary table and inserts into the table. The below example should work for you. p_gplus_config from a. Syntax: select select_list into variable_name from table_expression; In this syntax, one can place the variable after the into keyword. SELECT ( , ) INTO TARGET_REC . See, for example, the SELECT INTO doc page which state: "SELECT INTO -- define a new table from the results of a query" In pgplSQL I'm used to seeing it in this order: SELECT INTO I want to update a column in table stats with the specific column being a parameter, then return the updated value of that column [only has 1 row]: . variables; set; plpgsql; declare; Share. Example: create or replace function my_func() returns setof person_test language plpgsql as $$ declare aggregated_names text; begin select string_agg(distinct first_name,', ' order by first_name) into aggregated_names from select * from foo(); 1. Note that a dynamic SQL statement does not require a PREPARE like in your MySQL example. The SELECT INTO statement in Redshift retrieves data from one or more database tables, and assigns the selected values to variables. Currently, I can't do a select into a variable directly, since if the query returns nothing, the PL/SQL would complain variable not getting set. Ask Question Asked 11 years -- THIS DOESN'T WORK! EXECUTE 'SELECT $1' INTO id_value USING id_default; new. 使用SELECT INTO语句从数据库中查询数据并将其分配给变量。 CREATE OR REPLACE FUNCTION WBAR_TEST_2 RETURN NUMBER IS LN_TMP NUMBER; BEGIN SELECT SOME_SEQUENCE. As pointed out by Adrian Klaver and Tom Lane, the real problem was in casts that I was using were confusing the parser and were un-necessary. select array_agg(id) --<< aggregate all IDs into an array into dog_ids FROM dogs WHERE dogs. To do that, you need to aggregate all IDs that are returned from the query. PL/pgSQL SELECT into an array. username = username; RETURN user_id; END $$ LANGUAGE PLPGSQL ; CREATE FUNCTION let's check: Select a column default value into a variable in Pl/PgSQL. 13. Unlike the SELECT INTO, SELECT select_expressions INTO does not create a table. This indeed is the usage found in ECPG (see Chapter 34 ) and PL/pgSQL An assignment of a value to a PL/pgSQL variable is written as: variable { := | = } expression; As explained previously, the expression in such a statement is evaluated by means of an SQL SELECT command sent to the The SELECT INTO statement allows you to select data from the database and assign the data to a variable. Jacobsen, it has been changed to a dynamic query, but how do then store the the select statement into variable? – kafka. Obtaining the Result Status 41. Commented Mar 20, Section 2. attname INTO my_pk_default, my_table_pk_col_name FROM pg_attrdef ad JOIN pg_attribute at ON at. This blog post delves into the syntax and techniques to (about assign value to variable out of declaration section) The language PLpgSQL syntax have many ways to say: Y := f(X); The EXECUTE clause is only for "dynamic execution" (less performance), EXECUTE 'f(X)' INTO Y; Use Y := f(X); or SELECT for execute static declarations, SELECT f(X) INTO Y; FETCH retrieves the next row from the cursor into a target. Follow answered Apr 12, 2012 at 2:46. You can examine a special variable FOUND of a type boolean. The function in SQL is called with SELECT statement. The PostgreSQL usage of SELECT INTO to represent table creation is historical. Your first example presents the correct way to bind the return value to Second use the select into statement to select a row whose film_id is 200 into the rec variable; Third, print out the information of the film via the record variable. DO $$ DECLARE max_sales_date DATE ; I am aware that a variable is not necessary in that case but I need this for another step whose development has not started yet. Using the type-copying feature offers the following advantages: First, you don’t need to know the type of column or reference being accessed. From the documentation: FOUND starts out false within each PL/pgSQL function call. Moreover, SELECT INTO will only store the first row of the result set in the variable. 9,150 2 2 and solved it adding another variable "Articulo"%rowtype and putting Select * Into thatvariable. Here's the syntax for assigning select results to variables: SELECT column_name INTO variable_name FROM table_name WHERE condition; The reason the SET-SELECT version is the safest way to set a variable is twofold. Viewed 5k times 0 . MyTable ) ; RAISE NOTICE 'RowCount: %', This is a simple question: In PL/pgSQL, how do I select an array of composite objects into a local how do I select an array of composite objects into a local variable? I'm on Postgres 13. (For each in the same). BEGIN; SELECT reffunc2(); reffunc2 ----- <unnamed cursor 1> (1 row) FETCH ALL IN "<unnamed cursor 1>"; COMMIT; The following example You need to use the INTO clause in the RETURNING to set the value being returned into your variable: DECLARE myid OAMENI. plpgsql: concatenation of variable into FROM clause. exec is a SQL*Plus command, not part of a SQL statement, so that doesn't belong there. rspCreateAndInsertUpdateBranchWiseTurnOverTable( AccountGroupIdCol NUMERIC(10,0), Simpler, shorter, faster: EXISTS. id FROM sometab s LOOP INSERT INTO othertab(id) VALUES(_id); END LOOP; or faster (and shorter) pattern. The problem is that postgresql always says: argument of WHERE must be type boolean, not type character vary (see this other question for assign value to variable at declaration section) The language PLpgSQL syntax have many ways to say: Y := f(X); The EXECUTE clause is only for "dynamic execution" (less performance), EXECUTE 'f(X)' INTO Y; Use Y := f(X); or SELECT for execute static declarations, SELECT f(X) INTO Y; Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. MyProcedure() AS $$ DECLARE RowCount int = 100; BEGIN select cnt into RowCount from ( Select count(*) as cnt From schema. variable_list: is a comma-separated list of variables that store the values fetched from the cursor. But the variable is being interpreted as the table name instead of the value of the variable . The problem is that I need this to work in a read-only instance as well, but in a read-only instance I can't create a table and/or insert into it. Function returns 1: CREATE FUNCTION create_factor( p_name VARCHAR(255) ) RETURNS integer AS $$ DECLARE v_insert_id INTEGER; BEGIN v_insert_id:=1; RETURN v_insert_id AS id; END; $$ LANGUAGE plpgsql; I have a select statement that is generated dynamically based on the supplied parameter. custkey = c. attnum = ad. CREATE FUNCTION grow(col varchar) RETURNS integer AS $$ DECLARE tmp int; BEGIN tmp := (EXECUTE format( 'UPDATE stats SET %I = %I + 1 RETURNING %I', col, col, col ) ); RETURN tmp; END; SELECT count_function(); On Oracle it would be. But sometimes you need to call a function and you don't need to store result (or functions has no result). f1, result_record. My requirement was to get a CSV of all the column names of a particular table. In which I have written join query on multiple tables like: select a. PrimaryCntctKey FROM tarcustomer c, tarinvoice i WHERE i. The following shows how FOR _id IN SELECT s. Depending on the task, there are various alternatives: PostgreSQL table variable; SELECT multiple rows and columns into a record variable It's discouraged to use select into to create a table based on a select statement. Here is what I am trying to run: CREATE OR Replace PROCEDURE schema. into . Introduction In the robust PostgreSQL database ecosystem, PL/pgSQL stands out as a procedural language allowing developers to extend the database’s capabilities. id = id _value RETURN old; END IF; -- regular UPDATE RETURN new; END $$ LANGUAGE plpgsql; I'm just missing the step where i read the And get a bigint[] result to put into your bigint[] target. I would highly recommend to not pass comma separated values around. column%TYPE name variable%TYPE %TYPE provides the data type of a table column or a previously-declared PL/pgSQL variable. This command is ideal for duplicating or organizing data from an existing table into a new one for further analysis. The PostgreSQL SELECT INTO statement allows users to create a new table directly from the result set of a query. Furthermore, CREATE TABLE AS offers a superset of the functionality provided by SELECT INTO. how put result of a select query to a function in postgresql. Set a value to a variable based on the results of a query (in PL/pgSQL style) 0. DECLARE TYPE v_array_type IS VARRAY (10) OF NUMBER; var v_array_type; BEGIN SELECT x BULK COLLECT INTO var FROM ( SELECT 1 x FROM dual UNION SELECT 2 x FROM dual UNION SELECT 3 x FROM dual ); FOR I IN 1. And the declare section needs to come before the first begin:. identity Unrelated, but: you don't need SELECT statements to assign variable values if you don't retrieve those values from a table. Use the compare_schema API to monitor database schema changes in CI/CD How can I write a dynamic SELECT INTO query inside a PL/pgSQL function in Postgres? Say I have a variable called tb_name which is filled in a FOR loop from Learn how to use the PL/pgSQL SELECT INTO statement to copy data from a table to a variable in PostgreSQL. How to use variable inside quoted string in postgres dynamic SQL. This is what I have so far: CREATE OR REPLACE FUNCTION qa_scf I'm also trying not to execute the query in the function as I've run into issues with that, I'm just trying to have it dynamically create the query string, FETCH NEXT FROM cursor_name INTO variable_list; In this syntax: cursor_name specifies the name of the cursor. The PL/pgSQL SELECT INTO statement fetches the data from a particular table and assigns it to the given variable. You're trying to assign a row set to an array. film_count integer = 0; Inside the body section, we use a select into statement with the count() function to retrieve the number of films from the film table and assign it to the film_count variable: select count (*) into film_count from film; Assign select value to variable into Execute in PostgreSQL 9. The optional USING expressions supply values to be inserted into the command. Does it make sense to store a couple of Boolean values as array? 2. 2. This statement allows you to retrieve specific column values from a query result and store them in variables. The SELECT returns several posts. Collation of PL/pgSQL Variables 41. 5. Row type variables – learn how to use the row variables to You don't need to handle exceptions in plpgsql blocks. id = x; In this tutorial, you will learn how to use the PL/pgSQL SELECT INTO statement to select data from the database and assign it to a variable. Then I iterate over these ids and store all direct friends of the current user in another variable. Modified 4 years, 9 months ago. custkey AND i. You are creating view from PLpgSQL. PostgreSQL/PLPGSQL I'm trying to inject some variables into my pgplsql Procedure that has a CTE that I use. If you have an older version, it's much harder to emulate this. adrelid JOIN pg_class c ON c. First you can create a new type that can hold multiple values: CREATE TYPE type_name AS (l_pin INTEGER, l_pin1 INTEGER); Then you can do something like: As dog_ids is declared as an array, the result of the first select has to be an array as well. It also can be a record. How to set and use a variable in a PostgreSQL Query. Assignment. Since you are trying to pass a value (which is not the same as a literal, btw), all you need is the USING clause of the plpgsql EXECUTE command, You need to use an EXECUTE . Doing it all in a single query is typically faster, as long Oracle PL/SQL select into variables. INSERT INTO Foo (Field1,Field2,Field3) VALUES (@value1,@value2,@value3) ON CONFLICT DO NOTHING; select * from Foo where Field1 = @value1 and Field2 = @value2; SELECT dt. Row type variables – learn how to use the row variables to In PostgreSQL, the select into statement to select data from the database and assign it to a variable. attnum JOIN pg_namespace n ON n. Compatibility. Concatenate variable into dynamic SELECT statement in PL/pgSQL. a missing END for the CASE and parentheses not properly paired. END; ' LANGUAGE plpgsql; -- need to be in a transaction to use cursors. name INTO name FROM test_table WHERE test_table. You can use array_agg() instead. The way you declared the function (LANGUAGE 'sql'), the following apply:It can only contain regular SQL statements (for example, no SELECT INTO), and the result of the last statement is the result Then I want to call build_org_branch with parameters and assign it to a variable inside of another function like this: declare l_table record[]; result set into variable. Store query result in a PL/pgSQL variable. g. The optional target is a record variable, a row variable, or a comma-separated list of simple variables and record/row fields, into which the results of the command will be stored. foo + bar FROM src; Here block. You can use this to declare variables that will hold database values. ; Finally, display a message that shows the value of the actor_count variable using the RAISE NOTICE statement. Concat with sql function. 9. Executing Dynamic Commands 41. declare @foo varchar(50) = 'bar'; select @foo; This was kind of a non-sense function to demonstrate the problem I was having with the “select fields” and the “into variables”. In Oracle, the SELECT INTO statement retrieves values from one or more database tables (as the SQL SELECT statement does) and stores them in variables (which the SQL SELECT statement does not do). 4. Besides table columns, you can use expressions in the SELECT clause. oid = c. First, declare a variable named counter in the outer_block. Ask Question Asked 13 years, 6 months ago. CREATE TABLE AS is the recommended syntax, since this form of SELECT In PostgreSQL, the PL/pgSQL SELECT INTO statement helps us store the table's data into a specific variable. To generate an interval of days based on the parameter, you can use the make_interval() function: date := current_timestamp - make_interval(days => num_days); But you are over-complicating things. Assign select value to variable into Execute in PostgreSQL 9. In this example: First, declare a variable called actor_count that stores the number of actors from the actor table. The following illustrates the syntax of the SELECT INTO In PostgreSQL, the select into statement to select data from the database and assign it to a variable. And the into needs to be in the outermost statement, yes. plpgsql; postgresql-9. How to PostgreSQL official documentation (as on 12 July 2022) clearly calls out that as below: SELECT INTO is not currently supported within EXECUTE; instead, execute a plain SELECT command and specify INTO as part of the EXECUTE itself. Commented Oct 2, 2020 at 10:55. INTO @TempItem SELECT NEWID(), @CustomerId, @Description, @Type, @Username, GETDATE() SELECT ItemId, CustomerId, @TopRelatedItemId, Description, Type, Username, TimeStamp FROM @TempItem END GO So the question for you guys is is there a possibility to do something along the lines of: As with SELECT INTO, the special variable FOUND can be checked to see whether there was a row to move to. This indeed is the usage found in ECPG (see Chapter 34) and PL/pgSQL (see Chapter 41). Hi Am trying to write a pgsql function which performs copy of table data to a csv file and am having difficulty using the variable value inside the function as below: CREATE OR REPLACE FUNCTION t Is it possible to concatenate the result of a query into a variable in postgresql? Something like this in MSSQL: DECLARE @Names_tmp NVARCHAR(max); select @Names_tmp = COALESCE(@Names_tmp + ' UNION ALL ', I want to do this inside a plpgsql function WITH set1 AS ( select * from table1 where -- reduce table1 to the small working set once for multiple reduce table1 to the small working set once for multiple reuse ), query_only_for_select_into AS ( select id as my_variable_declared_earlier from set1 where foo = 'bar You should not convert a timestamp into a varchar if you plan to store it in a timestamp variable (and then compare it to a timestamp column). Dynamic variable names in plpgsql (String to variable name) 0. SELECT count_function() FROM DUAL; To store the result in a variable you can do this: DECLARE result int; SET result = SELECT count_function(); In your case the trigger can be written as: INSERT into app. x + 1, dt. Using variables in a plpgsql function. 2. Asking for help, clarification, or responding to other answers. oid AND cn. Viewed 4k times 7 I'm Concatenate variable into dynamic SELECT statement in PL/pgSQL. This target can be a row variable, a record variable, or a comma-separated list of simple variables, just as with SELECT INTO. In summary, mastering SELECT INTO @Variable in SQL Server offers developers a powerful means to efficiently handle data retrieval and manipulation within T-SQL scripts. x, dt. CREATE FUNCTION test() RETURNS SETOF RECORD AS $$ DECLARE rec record; BEGIN select 1,2 into rec; return next rec; select 3,4 into rec; return next rec; END $$ language plpgsql; If you want to pass all values generated by your query to a function or procedure, you can aggregate everything into an array, then pass that array to the function: The target is a record variable, row variable, or comma-separated list of scalar variables. See examples with different clauses, such as WHERE, GROUP BY, and JOIN. You cannot mix a record variable and a scalar variable, though, as you seem to be trying. Description from the manpage: \gset [ prefix ] Sends the current query input buffer to the server and If the SELECT statement returns no rows, the variables will retain their initial values. How to assign result of a sql query to a variable and use it into a built in function? 0. I want to insert data into a table and get the newly inserted data into a variable, so I can call a function with that data. So the first select statement should be . Select multiple rows as array. How to use SELECT INTO in a plpgsql PROCEDURE? 1. PL/pgSQL variables are identifiers that cannot start with @. You are, however, mixing up SQL functions and PL/pgSQL functions. This statement allows you to retrieve specific column values from a query It involves processing the results of a query. Variables – show you how to declare variables in PL/pgSQL. 1. @kafka Use the INTO keyword as described in the docs. Because of tag plpgsql I assume that you are executing some queries inside a plpgsql function and the result saved in a variable should be send to a file. The documentation for select into explicitly mentions PL/pgSQL as one of the reasons:. CREATE OR REPLACE FUNCTION add_row() RETURNS TRIGGER AS $$ declare l_row_exists boolean; BEGIN select exists (SELECT * FROM some_table WHERE user_id = Execute INSERT INTO in PLPGSQL using variables as values. Variables can use any valid Amazon Redshift data type. It is recommended to use the (standard compliant) create table as. oid = at. I'm INSERT INTO with SELECT FROM into variable. As you have seen, you cannot use a variable like a table. id%TYPE; INSERT INTO oameni VALUES (default,'lol') RETURNING id INTO myid; You also need to specify the data type of your variable; I'm glad to see postgresql supports %TYPE and %ROWTYPE. Concatenate the result of a query into a variable in PostgreSQL. variable_conflict to one of error, use_variable, or use_column The function needs to return a SETOF RECORD instead of RECORD and have one RETURN NEXT per row instead of a single RETURN, as in:. Next, declare a variable with the same name in the subblock. SET plpgsql. p_fb_config. id, lev+1 I have seen many explanations about SELECT INTO in the oracle clause. Besides selecting data from a table, one can With MSSQL it's easy, the @ marking the start of all variable names allows the parser to know that it is a variable not a column. Postgres properly supports arrays and I would use an array as a parameter and and array as the return value as well. How to pass table column values to function. If you want to create a table from a SELECT result inside a PL/pgSQL function, use the syntax CREATE TABLE AS SELECT. id; INSERT INTO dest (col) SELECT block. But this view will live without PLpgSQL - so you cannot to use PLpgSQL features there I'm trying to run a simple query in plpgsql using a variable as table name in plpgsql. select into auxsigla, auxnome from will always set the variables to NULL because you forgot to specify which columns you want to select. t=# CREATE OR REPLACE FUNCTION get_user_id(username TEXT) RETURNS INTEGER AS $$ #variable_conflict use_variable DECLARE user_id BIGINT; other_param TEXT; BEGIN SELECT INTO user_id users. Comment 1: At certain point I get two values that I have to move to my record variable. contype = 'p' AND cn. Comment 2: Good, but my values didn't come from a table - they are simple variables that I got from string operations or arithmetic operations. The output of the SELECT must be stored somewhere. It is set by each of the following types of statements: A SELECT INTO statement sets FOUND true if a row is assigned, false if no row is returned. Modified 11 years, 1 month ago. The query planner can stop at the first row found - as opposed to count(), which scans all (qualifying) rows regardless. Here’s the syntax for declaring a row variable: row_variable table_name%ROWTYPE; row_variable view_name%ROWTYPE; In this syntax: What I need to do is set a value to a variable using the EXECUTING query. Then you'll need to add a derived table to get your LIMIT to work. I am trying to assign a variable the result of a query in a postgres stored procedure. Some other SQL implementations The core misunderstanding: a record variable holds a single row (or is NULL), not a table (0-n rows of a well-known type). v_query_string = 'SELECT count(*) FROM foo'; EXECUTE v_query_string into In some step of a plpgsql function I need to store a 2D query result into array variables. In PostgreSQL, the PL/pgSQL SELECT INTO statement helps us store the table's data into a specific variable. You need to run the select using the into clause inside the actual code block, not in the declare block: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog The result of a select needs to go somewhere - so you need to put the result into a variable. Control Structures Assuming this happens inside a PL/pgSQL code block, since you tagged plpgsql, there are no "variables" in plain SQL, and you are returning INTO a result variable, which is a feature of PL/pgSQL, not available in plain SQL. When working with PL/pgSQL, there often arises a need to store the results of a query in a variable for further processing or manipulation. 5. Simply insert, use the ON CONFLICT DO NOTHING, and be on your way. extra_warnings TO 'strict_multi_assignment'; CREATE OR REPLACE FUNCTION public. 2; or 在这个例子中：首先，声明一个名为actor_count的变量，用于存储actor表中演员的数量。; 其次，使用SELECT INTO语句将演员的数量分配给actor_count。; 最后，显示一条消息，其中使用RAISE NOTICE语句显示actor_count变量的值。; 总结. , “emp_bio”. - The “RAISE NOTICE” is used to display the variable’s value. Glenn Glenn. The select into statement will assign the data returned by the select clause to the variable. relnamespace WHERE in plpgsql you can select into variable, but can't just select, as then it has no destination for result, so either use perform or use select result as implicit variable assingment, eg raise info '%',(select * from where = variable); (which again wont work if You need to perform a SELECT INTO like you did earlier in your function. 3 function. Is there any other way of doing this? Maybe by creating a table variable in a way similar to other SQL languages? Redshift SELECT INTO Variable. Function parameters, as well as special variables such as FOUND, set the configuration parameter plpgsql. 2) Using record variables in the for loop statement. Modified 12 years, 10 months ago. CREATE TABLE AS is the recommended syntax, since this form of SELECT INTO is not available in ECPG or PL/pgSQL, because they interpret the INTO clause differently. 4. IF EXISTS (SELECT FROM people p WHERE p. This is done by writing the base SQL command and adding an INTO clause. x * 10 FROM (SELECT random() * 10 AS x FROM generate_series(1, 10)) dt; -- derived table Your example showing interesting bug - trap. Doing Nothing At All 41. But it isn't clear where that snippet/subquery fits in to a bigger one though - is it a select list expression, an inline view, a join condition? I need to return a dynamically generated select statement from a plpgsql function. SELECT INTO does not return data to the client but saves it in a new table, allowing for streamlined data handling and improved query . Syntax: select select_list into variable_name from table_expression; In To assign the results of a SELECT query to variables, you can use the SELECT INTO statement. Select into – guide you on how to use the select into to select data and assign it to a variable. And your code is reduced so much that it doesn't make sense any more: if How to use SELECT INTO in a plpgsql PROCEDURE? 0. id, 0 FROM areas AS a1 WHERE a1. In plain SQL you can save a text in a file using a copy command, something like this:. IIRC, from the documentation, SELECT INTO does not work in this instance, however, query results can be stored by creating Row variables or row-type variables are variables of composite types that can store the entire rows of a result set. f2, result_record. copy (select 'some text') to 'c:\data\sample. How to print bwtid or use for to execute query create or replace function dashboard. adsrc, at. - A row-type variable named “emp_info” is declared. - The WHERE clause defines the selection criteria. Different clauses can be used with the PL/pgSQL SELECT INTO statement for different purposes, such as the WHERE clause, Concatenate variable into dynamic SELECT statement in PL/pgSQL. By grasping its syntax and adhering to best practices, developers can seamlessly store single values, name table. DO 36. Assignment 41. Different clauses can be used with the PL/pgSQL SELECT INTO statement for different purposes, such as the WHERE clause, CREATE TABLE AS is functionally similar to SELECT INTO. conkey[1] = at. Dynamic variable names in plpgsql (String to variable name) 2. Ask Question Asked 9 years, 3 months ago. I'd used the following code in plpgsql. In your case, you don't need a variable at all: SELECT max(avg_score), min(avg_score) INTO max_raw, min_raw FROM (SELECT AVG(score) as avg_score FROM user_scores GROUP BY user_uuid) AS q; To assign the results of a SELECT query to variables, you can use the SELECT INTO statement. CREATE FUNCTION f() RETURNS trigger AS $$ declare total_num bigint; total_width bigint; BEGIN SELECT COUNT(*), SUM(width) into total_num, total_width FROM some_table WHERE foo = NEW. Improve this question. I googld all over but it was utterly worthless as most post were revolving around mysql/sql server or they were doing something out of the scope of what I'm trying to do. Here’s how you can declare and use variables in PL/pgSQL: So my approach was: Selecting all direct friends and store their ids's in a variable. Introduction to PostgreSQL SELECT INTO statement; PostgreSQL SELECT INTO examples; If you are looking for the way to select data into variables, check it out the PL/pgSQL SELECT INTO statement. to store the result. The expression must yield a single value. Skip to I changed the line to EXECUTE 'SELECT max(id) from ' || z_table INTO max_id; and it worked. The SELECT statement may include clauses such as JOIN, GROUP BY, and HAVING. plpgsql, variable inside query in Create or Replace Function someFunction([parameter1], [parameter2]) Returns Integer As $$ Declare someInt_ integer; totalRows_ integer; Begin SELECT x INTO someInt_, COUNT(*) INTO totalRows_ FROM [table] WHERE [some conditions]; [more code] End; $$ Language 'plpgsql'; The problem is that I get the following error: Here's my function declaration and part of the body: CREATE OR REPLACE FUNCTION access_update() RETURNS void AS $$ DECLARE team_ids bigint[]; BEGIN SELECT INTO team_ids "team_id" FROM "tmp_tea PERFORM is plpgsql command used for calls of void functions. – Laurenz Albe. We Storing results in a variable in plpgsql. select array_agg(photo_id) into strict photo_ids from ( select photo_id from tbl_album_photos where album_id = in_album_id and photo_id < in_photo_id order by photo_id desc limit in_limit ) dt; To use a variable inside a plpgsql function, you should declare the variable and use select into (or assignment statement). Redshift also selects rows defined by any query and In PostgreSQL’s PL/pgSQL language, you can declare and use variables for storing and manipulating data within stored procedures, functions, and triggers. user_id FROM users WHERE users. Hot Network Questions SELECT ad. parent_id = start_id UNION ALL SELECT a1. Then, before entering into the subblock, the value of the counter is one. Ask Question Asked 11 years, 1 month ago. You would have to a) split up the composite type v_data into scalar variables and list them in order, then append v_another_var to the FOR target list. Which was Variable declaration. Introduction to PostgreSQL Basically I want to make a data set like in PHP, where I can store the return of a select statement in a variable and then use it to do logical decisions. portal. Here is an , col2 numeric ); create or replace procedure bar () language plpgsql as $$ declare lv_foos udt _foo[]; begin You can list multiple variables in the into part. ; Summary. As with SELECT INTO, you can check the special variable FOUND to see whether a row was obtained. Variables & constants. Ask Question Asked 6 years, 3 months ago. In your example, you have a single simple variable name, so the select statement would be: SELECT test_table. Selecting query results into a variable in plpgsql. Viewed 2k times 1 Consider a function like that: CREATE OR REPLACE The reason the SELECT INTO does not work is because there are two contexts to execute it and SELECT INTO TABLE in not available in PL/pgSQL: can be assigned to a record variable, row-type variable, or list of scalar variables. In the subblock, we increase the Re: plpgsql question: select into multiple variables ? at 2015-06-29 20:02:48 from Adrian Klaver Re: plpgsql question: select into multiple variables ? at 2015-06-30 12:05:58 from Day, David Browse pgsql-general by date Section 2. Provide details and share your research! But avoid . An assignment of a value to a variable or row/record field is written as: identifier:= expression; . CREATE TABLE AS is functionally similar to SELECT INTO. There are no "table variables" in Postgres or PL/pgSQL. e. . But I would use a boolean and an exists condition for this purpose. Access select statement result in plpgsql function. 5k 19 19 gold badges 62 62 silver badges 99 99 bronze badges. xfzz tnaij kkramp qjuvsf rnejtkk rgqiyhqe dljhkmy ejfwg zmdff rhind