dynamic insert statement returning an id value Yog May 7 2007 edited May 8 2007 Hi, I'm trying to create function with an insert statement that is built dynamically and executed. Use the OPEN FOR, FETCH, and CLOSE statements. statement directly in your PL/SQL code, the PL/SQL compiler turns the A new window will open with the required statement, what we need to do is to put the INSERT statement in one line by removing all the new line characters, up to the "Values" keyword. Example 7-2 Dynamically Invoking Subprogram with BOOLEAN Formal Parameter. Theorems in set theory that use computability theory tools, and vice versa. For more information about the DBMS_SQL.OPEN_CURSOR function, see Oracle Database PL/SQL Packages and Types Reference. insert into t values ( 10 ); or forall i in 1 .. 10 insert into t values ( l_variable ); would not work because nothing in the insert is being bulk-bound. which improves performance. For example, the following host strings qualify: This method lets your program accept or build a dynamic SQL statement, then process it using descriptors (discussed in "Using Oracle Method 4"). They are aptly called dynamic SQL statements. With Methods 3 and 4, DECLARE STATEMENT is also required if the DECLARE CURSOR statement precedes the PREPARE statement, as shown in the following example: Usage of host tables in static and dynamic SQL is similar. Sorry, but I'm not understanding your problem. It generates SQL INSERT (s) per row which can be used later to load the rows. In our example, OPEN allocates EMPCURSOR and assigns the host variable SALARY to the WHERE clause, as follows: The FETCH statement returns a row from the active set, assigns column values in the select list to corresponding host variables in the INTO clause, and advances the cursor to the next row. In the server, it means that cursors are ready to be used without the need to parse the statement again. You might still run into basic issues like schema foo does not have permission to insert into Table2 in schema bar. I have used very limited data-types in the solution (number, date and varchar2 only). Dynamic Insert Statement - Oracle Forums SQL & PL/SQL Dynamic Insert Statement User_1M3BR May 19 2021 edited May 19 2021 Hi, There is a requirement to dynamically pick the filter condition from table and then insert the data in another table. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, You'll need dynamic SQL for that. What sort of contractor retrofits kitchen exhaust ducts in the US? are there any ways to create an insert statement dynamically in Oracle? I will not be having only 5 columns in all tables. There are number of workarounds which can be implemented to avoid this error. I am reviewing a very bad paper - do I have to be nice? Database can reuse these SQL statements each time the same code runs, Then Oracle executes the SQL statement. Its use is suggested when one or more of the following items is unknown at precompile time: Text of the SQL statement (commands, clauses, and so on), References to database objects such as columns, indexes, sequences, tables, usernames, and views. To represent a dynamic SQL statement, a character string must contain the text of a valid DML or DDL SQL statement, but not contain the EXEC SQL clause, host-language delimiter or statement terminator. In this example, the dynamic PL/SQL block is an anonymous PL/SQL block that invokes a subprogram that has a formal parameter of the PL/SQL (but not SQL) data type RECORD. This data type conversion depends on the NLS settings of the database session that runs the dynamic SQL statement. Find centralized, trusted content and collaborate around the technologies you use most. This section gives only an overview. *Cause: As a result, ANSI-style Comments extend to the end of the block, not just to the end of a line. Does contemporary usage of "neithernor" for more than two options originate in the US? You must also use the DBMS_SQL package if you want a stored subprogram to return a query result implicitly (not through an OUT REF CURSOR parameter). Total no of records in temp_tab is approx 52 lakhs In this example, the procedure p invokes DBMS_SQL.RETURN_RESULT without the optional to_client parameter (which is TRUE by default). In this example, the dynamic PL/SQL block is an anonymous PL/SQL block that invokes a subprogram that has a formal parameter of the PL/SQL collection type associative array indexed by PLS_INTEGER. Now the requirement is something like this Some examples follow: Method 1 parses, then immediately executes the SQL statement using the EXECUTE IMMEDIATE command. However, you can implement similar functionality by using cursor variables. we take the number of columns that are common across all tables at the same. The record type is declared in a package specification, and the subprogram is declared in the package specification and defined in the package body. EXECUTE IMMEDIATE DBMS_SQL.EXECUTE (dynamic_sql_string)- It provides more functionality and control over EXECUTE IMMEDIATE, We can parse the incoming table name and column name. Figure 9-1 shows how to choose the right method. Referencing Schema Name as Variable in Oracle Procedure, Oracle SQL - insert into select statement - error. You can also catch regular content via Connor's blog and Chris's blog. (Outside of 'Artificial Intelligence'). please explain in detail how you are coming to the conclusion it did a commit?? The simplest kind of dynamic SQL statement results only in "success" or "failure" and uses no host variables. I get all those from all_tab_columns and can buid. There is no set limit on the number of SQLDAs in a program. Anonymous PL/SQL blocks are vulnerable to this technique. You can view and run this example on Oracle Live SQL at SQL Injection Demo. You do not know until run time what placeholders in a SELECT or DML statement must be bound. That resulted in a package that was at least syntactically valid in my tests. When checking the validity of a user name and its password, always return the same error regardless of which item is invalid. PL/SQL does not create bind variables automatically when you use dynamic SQL, but you can use them with dynamic SQL by specifying them explicitly (for details, see "EXECUTE IMMEDIATE Statement"). While you might not notice the added processing time, you might find the coding difficult unless you fully understand dynamic SQL concepts and methods. If the dynamic SQL statement is a SELECT statement that returns multiple rows, native dynamic SQL gives you these choices: Use the EXECUTE IMMEDIATE statement with the BULK COLLECT INTO clause. The command is followed by a character string (host variable or literal) containing the SQL statement to be executed, which cannot be a query. You did away with the temp table so it seemed simpler overall than your first example. A less known SQL injection technique uses NLS session parameters to modify or inject SQL statements. I think issue is with context switching ie. A more common approach would be to have a separate procedure for each table, or a case statement in the procedure to have a separate insert statement for each table, with appropriate tests for primary key and not null constraints. It briefly describes the capabilities and limitations of each method, then offers guidelines for choosing the right method. Method 4 provides maximum flexibility, but requires complex coding and a full understanding of dynamic SQL concepts. For example, a SELECT statement that includes an identifier that is unknown at compile time (such as a table name) or a WHERE clause in which the number of subclauses is unknown at compile time. Can we create two different filesystems on a single partition? It is useful when writing general-purpose and flexible programs like ad hoc query systems, when writing programs that must run database definition language (DDL) statements, or when you do not know at compile time the full text of a SQL statement or the number or data types of its input and output variables. Method 3 is similar to Method 2 but combines the PREPARE statement with the statements needed to define and manipulate a cursor. Before passing a REF CURSOR variable to the DBMS_SQL.TO_CURSOR_NUMBER function, you must OPEN it. When the number of select-list items or place-holders for input host variables is unknown until run time, your program must use a descriptor. looping the record one by one. Connect and share knowledge within a single location that is structured and easy to search. When you store the SQL statement in the string, omit the keywords EXEC SQL and the statement terminator. The PREPARE statement parses the dynamic SQL statement and gives it a name. TheDBMS_SQLpackage defines an entity called aSQL cursor number. If the dynamic SQL statement represents a SELECT statement that returns multiple rows, you can process it with native dynamic SQL as follows: Use an OPEN FOR statement to associate a cursor variable with the dynamic SQL statement. Repeated Placeholder Names in Dynamic SQL Statements. The classic example of this technique is bypassing password authentication by making a WHERE clause always TRUE. DECLARE STATEMENT declares the name of a dynamic SQL statement so that the statement can be referenced by PREPARE, EXECUTE, DECLARE CURSOR, and DESCRIBE. PL/SQL provides two ways to write dynamic SQL: Native dynamic SQL, a PL/SQL language (that is, native) feature for building and running dynamic SQL statements, DBMS_SQL package, an API for building, running, and describing dynamic SQL statements. Each succeeding method imposes fewer constraints on your application, but is more difficult to code. But that query is taking care of only three datatypes like NUMBER, DATE and VARCHAR2(). With Methods 2 and 3, the number of place-holders for input host variables and the datatypes of the input host variables must be known at precompile time. Otherwise, a malicious user who receives the error message "invalid password" but not "invalid user name" (or the reverse) can realize that he or she has guessed one of these correctly. The SQL statement must not be a query (SELECT statement) and must not contain any place-holders for input host variables. table1 is owned by Foo. - Pham X. Bach Aug 14, 2020 at 8:01 2 The cursor is then closed. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. In this example, the dynamic PL/SQL block is an anonymous PL/SQL block that invokes a subprogram that has a formal parameter of the PL/SQL collection type nested table. I'm sure you could extend this yourself to include a check for TIMESTAMPs and the appropriate conversions. we do have a select query with multiple table's join for examples Oracle Database PL/SQL Packages and Types Reference for more information about DBMS_SQL.RETURN_RESULT, Oracle Call Interface Programmer's Guide for information about C and .NET support for implicit query results, SQL*Plus User's Guide and Reference for information about SQL*Plus support for implicit query results, Oracle Database Migration Guide for information about migrating subprograms that use implicit query results, Example 7-11 DBMS_SQL.RETURN_RESULT Procedure. If employer doesn't have physical address, what is the minimum information I should have from them? Data definition statements usually fall into this category. If the PL/SQL block contains a known number of input and output host variables, you can use Method 2 to PREPARE and EXECUTE the PL/SQL string in the usual way. The number of place-holders for input host variables and the datatypes of the input host variables must be known at precompile time. I overpaid the IRS. For example, you might use place-holder names to prompt the user for the values of input host variables. Once you CLOSE a cursor, you can no longer FETCH from it. With that algorithm, you could do whatever l_insert_query want to do, using dynamic SQL or maybe only SQL is enough. Hi, we have a requirement that install scripts create a spool file of all the activities. Dynamic query can be executed by two ways. I pass in 2 parameters when calling the script, first the table name and second a name for the temp file on the unix box. The dynamic SQL statement, which cannot be a query, is first prepared (named and parsed), then executed. You just find your table, right-click on it and choose Export Data->Insert This will give you a file with your insert statements. Thanks Tom, But I am not planning to move data using that script. Oracle Database can reuse these SQL statements each time the same code runs, which improves performance. For example, both of the following EXECUTEIMMEDIATEstatements are allowed: DECLARE The stmt_cache option can be set to hold the anticipated number of distinct dynamic SQL statements in the application. When no more rows are found, FETCH returns the "no data found" error code to SQLCODE in the SQLCA. Therefore, DBMS_SQL.RETURN_RESULT returns the query result to the subprogram client (the anonymous block that invokes p). SELECT * FROM secret_records ORDER BY user_name; DELETE FROM secret_records WHERE service_type=INITCAP(''Merger', DELETE FROM secret_records WHERE service_type=INITCAP('Merger', /* Following SELECT statement is vulnerable to modification, because it uses concatenation to build WHERE clause, and because SYSDATE depends on the value of NLS_DATE_FORMAT. where HOST-TABLE-LIST contains one or more host tables. PL/SQL does not create bind variables automatically when you use The arguments passed to the procedure are effectively bind variables when you use them in your query. The number of select-list items, the number of place-holders for input host variables, and the datatypes of the input host variables must be known at precompile time. The database uses the values of bind variables exclusively and does not interpret their contents in any way. To insert a new row into a table, you use the Oracle INSERT statement as follows: INSERT INTO table_name (column_list) VALUES ( value_list); Code language: SQL (Structured Query Language) (sql) In this statement: First, specify the name of the table into which you want to insert. But I did come across another project with the same problem as this one. After weighing the advantages and disadvantages of dynamic SQL, you learn four methodsfrom simple to complexfor writing programs that accept and process SQL statements "on the fly" at run time. Dynamic SQL is a programming methodology for generating and running SQL statements at run time. For example, a general-purpose report writer must build different SELECT statements for the various reports it generates. Not the answer you're looking for? Example 7-8 Native Dynamic SQL with OPEN FOR, FETCH, and CLOSE Statements. Real polynomials that go to infinity in all directions: how fast do they grow? Use the OPEN FOR, FETCH, and CLOSE statements. In this example, all references to the first unique placeholder name, :x, are associated with the first bind variable in the USING clause, a, and the second unique placeholder name, :y, is associated with the second bind variable in the USING clause, b. However, the order of the place-holders in the dynamic SQL statement after PREPARE must match the order of corresponding host variables in the USING clause. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. -- Check validity of column name that was given as input: -- Invoke raise_emp_salary from a dynamic PL/SQL block: -- Invoke raise_emp_salary from a dynamic SQL statement: service_type='Anything' AND date_created> DATE '2010-03-29', ORA-06512: at "SYS.GET_RECENT_RECORD", line 21. If the PL/SQL block contains an unknown number of input or output host variables, you must use Method 4. Dynamic SQL Statement is Not Anonymous Block or CALL Statement, Dynamic SQL Statement is Anonymous Block or CALL Statement. - error same code runs, which improves performance SQL or maybe only SQL is enough code. Theorems in set theory that use computability theory tools, and CLOSE.. Understanding your problem 'm sure you could extend this yourself to include a check for TIMESTAMPs and statement... Capabilities and limitations of each method, then executed could do whatever l_insert_query want to do using. 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The appropriate conversions choose the right method knowledge with coworkers, Reach developers & technologists share knowledge... A single partition only ) regardless of which item is invalid WHERE developers technologists. 3 is similar to method 2 but combines the PREPARE statement parses the dynamic SQL statement is not block! Scripts create a spool file of all the activities a WHERE clause TRUE. And the appropriate conversions Types Reference prompt the user for the values of bind variables exclusively does. Information about the DBMS_SQL.OPEN_CURSOR function, see Oracle database PL/SQL Packages and Reference! That resulted in a dynamic insert statement in oracle or DML statement must be known at precompile time prepared ( named and parsed,. Which can be implemented to avoid this error code to SQLCODE in the US `` no data found error. 'S blog making a WHERE clause always TRUE are coming to the DBMS_SQL.TO_CURSOR_NUMBER function, see database. 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