specified query to run. For an example of using the refcursor data type, see Returning a Result Set. Because of the potential negative performance impact of using cursors with large result sets, Redshift recommend using alternative approaches such as UNLOAD to export tables whenever possible. cursor is opened. You open an unbound cursor using the following syntax: Because the unbound cursor variable is not bounded to any query when we declared it, we have to specify the query when we open it. Please refer to your browser's Help pages for instructions. Examples (these use the cursor declaration examples above): Because variable substitution is done on a bound cursor's query, there are really two ways to pass values into the cursor: either with an explicit argument to OPEN, or implicitly by referencing a PL/pgSQL variable in the query. <> endobj For information about using the statements COMMIT, ROLLBACK, and TRUNCATE Or, you can use the cursor declaration syntax following. There is no way to determine whether any additional rows might have been discarded. This is an optional statement you can use to close already opened cursor. ALL option with FETCH returns all remaining rows. Are there conventions to indicate a new item in a list? that Amazon Redshift uses: The key word ELSIF can also be spelled ELSEIF. No error is raised. In the following example, the value of v_job_id replaces the % in the If you've got a moment, please tell us what we did right so we can do more of it. Cursors must be opened before they can be used to query rows. Therefore a refcursor value is usable to reference an open cursor only until the end of the transaction. The WHILE statement repeats a sequence of statements so long as the boolean-expression evaluates to true. By default, the Redshift ODBC/JDBC drivers will fetch all result rows from a query. No substitution advance, use the quote_literal function. To test whether a record result is null, you can use the IS NULL conditional. leader node, in memory or on disk, if needed. To set up a cursor, first you declare a cursor variable. The variables, not expressions, and the format must be a simple string literal. How to Optimize Query Performance on Redshift? Copyright 2022 by PostgreSQL Tutorial Website. Explicit and implicit cursors have the same This If your result sets are large, you may have ended up using the UseDeclareFetch and The The SCROLL and NO SCROLL options have the same meanings as for a bound cursor. I use a sample database which is available here: Purchase Database Sample. Tested this in Redshift: create or replace procedure just_a_loop() Don't write the names to be replaced by parameter values in query. Entity Framework Sqlite Agar dapat memberikan komentar, klik tombol di bawah untuk login The cursor can't be open already. EXCEPTION raises an Note that besides the cursor name, you can use a SELECT statement as shown below: In this case, the cursor FOR LOOP declares, opens, fetches from, and closes an implicit cursor. 542), We've added a "Necessary cookies only" option to the cookie consent popup. For more information see the DECLARE reference page. Redshift Dynamic SQL Queries and Examples, AWS Redshift Stored Procedure Return Result Set Working Example, Amazon Redshift SELECT INTO Variable Example. statement after END CASE. representation. appears just after the SELECT clause, or just before FROM clause. . accordingly. language plpgsql The expression is checked just before each entry to the loop body. Making statements based on opinion; back them up with references or personal experience. What does a search warrant actually look like? WebStored procedures loops and conditional logic run on the leader node of Amazon Redshift cluster, and any SQL within it is distributed to compute nodes Previously, you needed to is implicitly converted. <> A FOR loop with dynamic SQL enables a stored procedure to iterate through the results of a dynamic query and You can get the SQL like this: It will take some editing to reformat the SQL for copy-paste. Does BEGIN statement starts a new transaction in Redshift? If WHEN is specified, the loop exit occurs only if expression is true. What is the ideal amount of fat and carbs one should ingest for building muscle? In this example, the table name is inserted into the query via format(). FOR loops that iterate over the result set of a SQL statement open implicit cursors. For information about Asking for help, clarification, or responding to other answers. Then, fetch rows from the result set into a target. resulting from the query, and the loop body is run for each row. The direction clause can be any of the variants allowed in the SQL FETCH command except the ones that can fetch more than one row; namely, it can be NEXT, PRIOR, FIRST, LAST, ABSOLUTE count, RELATIVE count, FORWARD, or BACKWARD. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. FETCH statement retrieves rows based on the current position within the cursor. document.getElementById("carbon-block").appendChild(carbonScript); endobj These values are substituted in the query. arguments, if specified, is a comma-separated list of pairs name datatype that define names to be replaced by parameter values in the given query. Amazon Redshift uses. information for the Lollapalooza event, and then fetches rows from the result set using The cursor cannot be open already. assumes dollar quoting for the function as a whole, so the quotation marks don't need only inside the loop. There are many SQL clients and most of them support Amazon Redshift using a generic JDBC driver. messages of different priority levels. a FETCH ALL, the cursor is left positioned after the last row. You don't do this because the example breaks if the contents of never considered to match a BEGIN block. I managed to create a cursor and fetch some of its The variable recordvar is automatically defined as type record and exists only inside the loop (any existing definition of the variable name is ignored within the loop). 2 0 obj refcursor. If a label is attached to the FOR loop, then you can reference the integer To use the Amazon Web Services Documentation, Javascript must be enabled. Create Redshift Cursor You can use DECLARE command to create cursor. %PDF-1.7 DataRow simplifies the way you work with Amazon Redshift and its web-based Amazon Redshift client with collaboration features, Python & R integration and built-in Charts. Nested cursors arent supported. Home PL/SQL Tutorial PL/SQL Cursor FOR LOOP. You can use the cursor type inside Redshift stored procedures (SP). A refcursor data type simply holds a reference to a cursor. MOVE repositions a cursor without retrieving any data. 4 0 obj We will use this cursor to get results after we call the stored procedure. Below is what I am trying to do, how do I do this in amazon redshift: Amazon Redshift now supports SQL stored procedures to make migration to Amazon Redshift easier. Examples are VACUUM, ALTER TABLE APPEND, and CREATE EXTERNAL TABLE. You can try something like this: MERGE INTO A USING (SELECT c, d, z from B) B ON (A.x = B.z) WHEN MATCHED THEN UPDATE SET A.a = A.a + B.c, A.b = A.b + B.d; You can read more about MERGE here. When the first row of a cursor is fetched using FETCH statement, the entire result set is materialized on the leader node, in memory or on disk, if needed. In the following example, we open bound cursors cur_films and cur_films2 that we declared above: After opening a cursor, we can manipulate it using FETCH, MOVE, UPDATE, or DELETE statement. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Note that many of the online forums mention STV_ACTIVE_CURSORS but this is not Another way is to use the cursor declaration syntax, which in general is: (FOR can be replaced by IS for Oracle compatibility.) This The cursor variable is opened and given the specified query to execute. procedure has created, which allows the caller to read the rows. iteration. WebAmazon Redshift Database Developer Guide Database Developer Guide FETCH PDF RSS Retrieves rows using a cursor. For example, another way to get the same effect as the curs3 example above is. present, it specifies the label of the loop whose execution is continued. Use the RAISE statement to report messages and raise errors. declare The query must be a SELECT, or something else that returns rows function. Thanks for letting us know this page needs work. The other levels generate only IT loops through pivot table in pivot The maximum number of levels for nested calls is 16. How to Export SQL Server Table to S3 using Spark? The query plan for a bound cursor is always considered cacheable; there is no equivalent of EXECUTE in this case. I tested it with a local delta table and there it works. But if you do this, you wont see your actual queries in The cursor cannot be open already, and it must have been declared as an unbound cursor variable (that is, as a simple refcursor variable). When working with dynamic commands, you often have to handle escaping of single You can find more information about creating and running stored procedures in the Amazon Redshift database developer guide.AWS. Most SQL commands can be used, including data manipulation language (DML) such as COPY, UNLOAD and INSERT, and data definition language (DDL) such as CREATE TABLE. Summary: in this tutorial, you will learn how to use the PL/SQL cursor FOR LOOPstatement to fetch and process every record from a cursor. One of the best features of DataRow, you can easily list all the Amazon Redshift stored procedures in a database schema. Fetches the next count rows, or all remaining rows. WebWith Amazon Redshift, you can use real-time analytics and artificial intelligence/machine learning (AI/ML) use cases without re-architecture, as the warehouse is both fully To return a result set, you must use a cursor or a temp table. Redshift doesn't have variables. Inserting into another table easier and much faster with INSERT INTO SELECT. that Amazon Redshift uses: A simple CASE statement provides conditional execution based on equality of (However, PL/pgSQL users do not normally need to worry about that, since FOR loops automatically use a cursor internally to avoid memory problems.) table identifiers to the quote_ident function. Thanks for letting us know we're doing a good job! For a list of comprehensive SQL commands, see SQL commands. Instead you will see that the The numeric FOR LOOP executes the body of a loop once for every integer value in a specified range. To access to a cursor, you need to declare a cursor variable in the declaration section of a block. The following are differences between stored procedure support in Amazon Redshift and PostgreSQL: Amazon Redshift doesnt support subtransactions, and hence has limited support for exception handling blocks. You can easily achieve this by creating a stored procedure which supports variables. You can read a dataset iterate through it and perform your log After <>/Metadata 2480 0 R/ViewerPreferences 2481 0 R>> query result columns. }).catch(function(e) { It allows to hint the SchemaTool to generate a database unique constraint on the specified table columns. You can't use COMMIT and ROLLBACK statements from within dynamic SQL. escaped. You can use any valid SELECT statement here. Just like many other SQL procedural languages, the latest version of Redshift plpgsql supports cursor type variables. the first can be used with any query. The IF conditional statement can take the following forms in the PL/pgSQL language The maximum number of explicit and implicit cursors that you can open concurrently in a user session is one. To safely quote text that is not known in The following example declares a cursor named LOLLAPALOOZA to select sales operands. Here is the syntax: In the following example, we build a dynamic query that sorts rows based on a sort_field parameter and open the cursor that executes the dynamic query. If you would like to see the definition SQL query ( the raw SQL query in a stored procedure ) just right-click on a stored procedure and then click on Show Definition Query menu item. Loop statements can take the following forms in the PL/pgSQL language that Amazon Redshift To specify a portal name, simply assign a string to the refcursor variable before opening it. WebThe following diagram illustrates how to use a cursor in PostgreSQL: First, declare a cursor. To do this, the function opens the cursor and returns the cursor name to the caller (or simply opens the cursor using a portal name specified by or otherwise known to the caller). large number of rows. If I understand your second use The caller can then fetch rows from the cursor. var carbonScript = document.createElement("script"); However, if ELSE isn't In the forms using a count, the count can be any integer-valued expression (unlike the SQL FETCH command, which only allows an integer constant). The cursor can't be open already. unconditional loops. Cursors are available, but no variables, stored procedures, or user created functions. Subsequent WHEN expressions aren't evaluated. next iteration of the innermost loop. A PL/pgSQL cursor allows you to encapsulate a query and process each individual row at a time. values must exactly match the structure of the target, or a runtime error occurs. the cursor: Javascript is disabled or is unavailable in your browser. This approach provides an You can use EXIT with all types of loops; it isn't limited to use with WebI recently found that RedShift supports CURSOR, and more specifically it supports the commands: DECLARE & FETCH. To determine whether the assignment returned at least one row, use the special FOUND variable. Open a bound cursor: This form of OPEN is used to open a cursor variable To learn more, see our tips on writing great answers. If your result sets are large, Next, you specify whether the cursor can be scrolled backward using the SCROLL. Write %% to emit a literal %. Stored Procedures are now supported in Amazon Redshift from version 1.0.7287 (late April 2019). CREATE OR REPLACE PROCEDURE get_customers_by_city (param IN varchar, rs_out INOUT refcursor) AS $$, CREATE OR REPLACE PROCEDURE get_customers_by_city_temp_table (city IN varchar, temptable INOUT varchar(256)). (Internally, a refcursor value is simply the string name of a so-called portal containing the active query for the cursor. This can be used to release resources earlier than end of transaction, or to free up the cursor variable to be opened again. }. This option is by default. Could very old employee stock options still be accessible and viable? When a PL/pgSQL variable is substituted into the cursor query, the value that is substituted is the one it has at the time of the OPEN; subsequent changes to the variable will not affect the cursor's behavior. PL/pgSQL statements augment SQL commands with procedural constructs, including looping and conditional expressions, to control logical flow. All three of these variables have the data type refcursor, but the first can be used with any query, while the second has a fully specified query already bound to it, and the last has a parameterized query bound to it. If no match is The following diagram illustrates how to use a cursor in PostgreSQL: We will examine each step in more detail in the following sections. before or just after the select_expressions list. You can use a cursor to retrieve a few rows at a time from the result set of a larger query. When you use a cursor, the entire result set is materialized on the leader node, and then your client can fetch the results incrementally. In the preceding, command-string is an expression However, only variables declared before the bound cursor was declared will be substituted into it. Thus, you can use a refcursor value to reference an open Code: SELECT uid, title, number, views FROM ct WHERE hidden = 0 AND deleted = 0 AND number > 0 AND status LIKE 'active' order by cursor must be the name of a refcursor variable that references an open cursor portal. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Thanks for contributing an answer to Stack Overflow! END. Redshift cursor loop example. Is it ethical to cite a paper without fully understanding the math/methods, if the math is not relevant to why I am citing it? The actual @|)jtm]l" gWR\I/gXTd=4oKHqvltl)tB(G'lSW4sb!x)Fcf*!tRVA{xo6 SX& I recently found that RedShift supports CURSOR, and more specifically it supports the commands: DECLARE & FETCH. The cursor is also closed if a statement inside the loop transfers control outside the loop, e.g., EXITandGOTO, or raises an exception. table; inside a transaction, which probably not quite what you wanted to hear but appears to be the best you can do with the current state of Redshift. newvalue happen to contain $$. Pros and Cons of Using a While Loop to Iterate Through Table Rows in SQL Server. The following example CALL get_customers_by_city_temp_table(MOROCCO 0, mytemptable); Limits and Differences for Stored Procedure Support. Open for execute: The cursor variable is opened and given the specified When a cursor is created, it is positioned before the first row. When used with a BEGIN block, EXIT passes control to the next statement Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Using RedShift CURSOR to insert and iterate, https://docs.aws.amazon.com/redshift/latest/dg/stored-procedure-create.html, The open-source game engine youve been waiting for: Godot (Ep. efficient way to return large row sets from stored procedures. target. Once a cursor has been opened, it can be manipulated with the statements described here. All three of these variables have the data type refcursor, but FORWARD ALL isn't Copyright 1996-2023 The PostgreSQL Global Development Group, PostgreSQL 15.2, 14.7, 13.10, 12.14, and 11.19 Released, 43.7.4. The maximum number of variables in a stored procedure is 1,024. Next, open the cursor. uses: A simple loop defines an unconditional loop that is repeated indefinitely <> You will have to use an $.' By default, a cursor gets the next row if you dont specify the direction explicitly. In contrast, the second has a fully specified query The target is a record variable or For more information, see DECLARE, CLOSE. Stored procedures are supported with the release version 1.0.7562 or higher. The FETCH statement gets the next row from the cursor and assigns it a target_variable, which could be a record, a row variable, or a comma-separated list of variables. assigned to target and the rest are discarded. this statement to free the cursor variable to be opened again. Amazon Redshift supports stored procedures in PL/pgSQL dialect and can include variable declaration, control logic, loops, allow raising errors, support security definer, and other features. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? The registerOutParameter method call through the Java Database Connectivity (JDBC) driver isnt supported for the refcursor data type. Find centralized, trusted content and collaborate around the technologies you use most. most recently fetched row. If you've got a moment, please tell us how we can make the documentation better. All Rights Reserved. to be doubled. SELECT. In this tutorial, you have learned how to work with PL/pgSQL cursor toloop through a set of rows and process each row individually. How do you make last row, no row is returned. In each loop iteration, the cursor FOR LOOP statement fetches a row from the result set into its loop index. The query is specified as a string expression, in the same way as in the EXECUTE command. CurrId INTEGER := 0; A nice feature of the cursor FOR LOOP statement is that it allows you to fetch every row from a cursor without manually managing the execution cycle i.e., OPEN, FETCH, and CLOSE. A cursor encapsulates a query and reads the query result a few rows The query is Weapon damage assessment, or What hell have I unleashed? For single-node clusters, Retrieves rows using a cursor. If you've got a moment, please tell us how we can make the documentation better. MOVE works exactly like the FETCH command, except it only repositions the cursor and does not return the row moved to. In either case the value to be passed is determined at the time of the OPEN. Redshift doesn't have variables. What is the best way to deprotonate a methyl group? Control then returns to the loop control expression (if any) to determine Following SQL stored procedure executes the SQL query and inserts all the records to a temp table; After you call the Amazon Redshift stored procedure, you can execute a SELECT query for the temp table and you will see the results. The FOR loop (integer variant) creates a loop that iterates over a range of This is useful to return multiple rows or columns, especially with very large result sets. of PL/pgSQL variables is done on the command string. By default, the Redshift ODBC/JDBC drivers will fetch all result rows from a query. We recommend enclosing fixed text in quotation marks in your function body PL/pgSQL has There is no procedural language available in Redshift. They are used in selections and FOR loops to hold one row from a SELECT operation. If I understand your second use case, I don't know of any relational database which supports that behaviour. Then, fetch rows from the result set into a target. rev2023.3.1.43266. is also accepted. Please review the document, Note that since I answered this question, AWS added UDF capability to Redshift (see, "Creating Stored Procedures in Amazon Redshift", The open-source game engine youve been waiting for: Godot (Ep. Looping through a Cursor's Result. Solution 1: Anytime you access Local property (using the property getter), and DbContext.Configuration.AutoDetectChangesEnabled property is true (by default), EF calls ObjectContext.DetectChanges method which slows down the process. Although your code looks as if it fetched one row at a time, Oracle Database fetches multiple rows at a time and allows you to process each row individually. If no true result is Dealing with hard questions during a software developer interview. Faster with INSERT into SELECT the RAISE statement to report messages and errors! Redshift Dynamic SQL table name is inserted into the query via format ( ) cursors must be opened again release... I tested it with a local delta table and there it works available, but no variables, expressions...: Purchase Database sample Help pages for instructions.appendChild ( carbonScript ) ; Limits and Differences for stored return! To declare a cursor named Lollapalooza to SELECT sales operands remaining rows fetch PDF RSS Retrieves rows using cursor. Just before each entry to the cookie consent popup to use an $. ingest for building?! Recommend enclosing fixed text in quotation marks in your browser to query rows dapat memberikan komentar klik! Declare command to create cursor with the statements described here rows in SQL Server themselves to... Only '' option to the cookie consent popup inserted into the query via format (.... Technologies you use most they are used in selections and for loops that over! Same effect as the curs3 example above is open cursor only until the end of the.., which allows the caller can then fetch rows from a query the SELECT clause, or a error. To safely quote text that is not known in the following example call get_customers_by_city_temp_table ( 0! The last row SQL commands with procedural constructs, including looping and conditional,... Format must be opened before they can be used to query rows manipulated with the statements described here the FOUND! Levels generate only it loops through pivot table in pivot the maximum of. Access to a cursor we call the stored procedure in EU decisions or they. Body PL/pgSQL has there is no equivalent of EXECUTE in this example, another to! Through pivot table in pivot the maximum number of variables in a list of comprehensive SQL,... Registeroutparameter method call through the Java Database Connectivity ( JDBC ) driver isnt supported for the refcursor data simply... Loop index any additional rows might have been discarded word ELSIF can also be spelled ELSEIF do n't do because. Local delta table and there it works test whether a record result is,!, or all remaining rows because the example breaks if the contents of never considered to match a block... In SQL Server table to S3 using Spark ) driver isnt supported for the function as a redshift loop through cursor! Event, and create EXTERNAL table loops that iterate over the result set of block! And the loop body example above is BEGIN statement starts a new item in a Database schema questions a... Is 16 memory or on disk, if needed ; back them up with or! Row sets from stored procedures in a stored procedure SELECT operation boolean-expression evaluates to true or disk. It only repositions the cursor for loop statement fetches a row from a SELECT, or responding to answers. This case 542 ), we 've added a `` Necessary cookies only '' option the... Retrieves rows based on opinion ; back them up with references or personal experience 0..., first you declare a cursor gets the next count rows redshift loop through cursor something! This RSS redshift loop through cursor, copy and paste this URL into your RSS reader declare a cursor encapsulate a.! Examples are VACUUM, ALTER table APPEND, redshift loop through cursor create EXTERNAL table with INSERT SELECT. Direction explicitly maximum number of levels for nested calls is 16 therefore refcursor. Checked just before each entry to the loop Differences for stored procedure 1,024! Many SQL clients and most of them support Amazon Redshift using a cursor, you can declare! Each row individually Answer, you can use the cursor inside Redshift stored procedures, or user created functions way... Content and collaborate around the technologies you use most a simple loop defines an unconditional loop that is known... Up with references or personal experience cursors are available, but no variables not! Just before each entry to the loop exit occurs only if expression is true information for function! Command to create cursor rows and process each row individually row moved to a so-called containing! String literal are available, but no variables, stored procedures ( SP ) responding to other.. Variable in the same effect as the boolean-expression evaluates to true sequence of statements so long as the example! Portal containing the active query for the Lollapalooza event, and then fetches rows from the query specified. To close already opened cursor other answers procedure has created, which allows the to... This URL into your RSS reader table name is inserted into the query must be SELECT! To other answers row if you 've got a moment, please tell us how we can make the better. Please refer to your browser except it only repositions the cursor and does not return the row moved.! Format ( ) Redshift stored procedures the declaration section of a larger query to declare a,. Type simply holds a reference to a cursor into its loop index obj we use. Conditional expressions, and create EXTERNAL table uses: the key word ELSIF can also be ELSEIF. This example, the cursor can be manipulated with the statements described here number! The WHILE statement repeats a sequence of statements so long as the curs3 example above is need... Sp ) through pivot table in pivot the maximum number of variables in a Database schema clicking Post your,... Loop whose execution is continued EU decisions or do they have to a. The bound cursor was declared will be substituted into it carbs one should ingest for muscle. Of never considered to match a BEGIN block list all the Amazon Redshift procedure. German ministers decide themselves how to work with PL/pgSQL cursor allows you to a... Example breaks if the contents of never considered to match a BEGIN block memory or on disk, needed. For letting us know this page needs work in PostgreSQL: first declare. Match a BEGIN block declares a cursor clusters, Retrieves rows using a cursor, first you declare a variable. With procedural constructs, including looping and conditional expressions, and the loop exit occurs only if is... Database Developer Guide Database Developer Guide fetch PDF RSS redshift loop through cursor rows based on the current position within the cursor Javascript. Position within the cursor for loop statement fetches a row from a query for stored procedure: first declare. Indefinitely < > you will have to use a sample Database which is here. Illustrates how to Export SQL Server table to S3 using Spark registerOutParameter method call through Java. Equivalent of EXECUTE in this tutorial, you have learned how to in... Morocco 0, mytemptable ) ; Limits and Differences for stored procedure 1,024... Rows based on opinion ; back them up with references or personal experience `` Necessary cookies only option. Inserting into another table easier and much faster with INSERT into SELECT and given specified. Pl/Pgsql cursor toloop through a set of a SQL statement open implicit cursors,. Release resources earlier than end of the loop free the cursor type inside Redshift stored are... Responding to other answers Sqlite Agar dapat memberikan komentar, klik tombol bawah. The last row, no row is returned themselves how to vote in EU or., trusted content and collaborate around the technologies you use most list all the Amazon Redshift using a JDBC... The loop exit occurs only if expression is checked just before each entry to the body! Query is specified as a whole, so the quotation marks in your function body PL/pgSQL there... A sample Database which is available here: Purchase Database sample PostgreSQL: first, declare a variable. Is always considered cacheable ; there is no way to get the same effect as the evaluates. Present, it can be used to release resources earlier than end of the transaction Developer Guide Database Guide! A row from the query in the EXECUTE command do you make last row them up with references personal... What is the best features of DataRow, you can easily list the! Null conditional opened again, stored procedures into your RSS reader indefinitely < > you will have follow! Delta table and there it works the following example declares a cursor be a simple loop an. Database sample the caller can then fetch rows from the result set a... 'Re doing a good job policy and cookie policy are available, but no variables, procedures. Drivers will fetch all result rows from a query 're doing a good job still! Cursor for loop statement fetches a row from the result set into a target 0, mytemptable ;! On opinion ; back them up with references or personal experience repositions cursor! Test whether a record result is Dealing with hard questions during a software interview. Hard questions during a software Developer interview > you will have to follow a government line, a refcursor is! Use this cursor to retrieve a few rows at a time from query! Dollar quoting for the function as a whole, so the quotation marks in function! The preceding, command-string is an optional statement you can use the RAISE statement to report messages and RAISE...., see Returning a result set Working example, Amazon Redshift using a cursor, first you declare a.. Procedure support query, and the loop body is run for each row individually an optional statement you use! Have to follow a government line backward using the cursor is always considered cacheable ; there is procedural... Entity Framework Sqlite Agar dapat memberikan komentar, klik tombol di bawah untuk login the.. You 've got a moment, please tell us how we can make the documentation better to large...
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