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1Z0-101 Develop PL/SQL Program Units

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1Z0-101 exam Dumps Source : Develop PL/SQL Program Units

Test Code : 1Z0-101
Test title : Develop PL/SQL Program Units
Vendor title : Oracle
braindumps : 142 real Questions

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Oracle Develop PL/SQL Program Units

Oracle's most recent PL/SQL role 'purchasable via' | killexams.com real Questions and Pass4sure dumps

Oracle has offered packages for a long time now, however except currently or not it's been complicated, if not unimaginable, to maintain away from 'out of context' execution of features and strategies; in many cases kit code is designed to live used within the context of the equipment, no longer as stand-by myself procedures and features. In unlock 12.2.0.1, Oracle has addressed this problem with the obtainable by passage of clause. This clause enables developers to refine the scope of a system or feature title and generate an oversight message when that manner or feature is referred to as outside of the equipment context. Let's construct an illustration as an instance how this is written and what consequences are acquired when the context-confined code is executed in context and out.

purchasable by means of can restrict particular types of application instruments or named application units of an unspecified type. The syntax for the clause is:

attainable by using ([unit_kind] [schema.]unit_name)

...where [unit_kind] is an non-compulsory parameter indicating system, feature, equipment, set off or classification, [schema] is the schema where the unit is observed and unit_name is the title of the technique, role or equipment having restrained access. When [unit_kind] is supplied then a specific package, method, function, trigger or class can handiest live referred to as or used from inside the defined context. When [unit_kind] isn't presented then any of the listed types can also live referenced provided that they've the declared unit_name. they will birth with an entry via identify example:

SQL> -- SQL> -- Create a manner best attainable SQL> -- by a named itemSQL> -- SQL> -- remonstrate can suffer any supported type SQL> -- SQL> create or change procedure my_restrict_proc 2 available by (restrict_fc) 3 as 4 start 5 dbms_output.put_line('accomplished my_restrict_proc.'); 6 conclusion; 7 / procedure created. SQL> SQL> -- SQL> -- Create a role handiest attainable SQL> -- by passage of a triggerSQL> -- SQL> create or exchange characteristic top_protected_f return number 2 accessible by using (set off restrict_fc ) as 3 begin 4 return 1.27349; 5 cease top_protected_f; 6 / feature created. SQL> SQL> -- SQL> -- Create a feature SQL> -- SQL> -- role calls the technique that can call SQL> -- the unit having the confined nameSQL> -- SQL> create or substitute characteristic restrict_fc return quantity AUTHID DEFINER IS 2 role g return quantity DETERMINISTIC IS 3 begin 4 return 1.27349; 5 conclusion g; 6 begin 7 my_restrict_proc; eight return g() - DBMS_RANDOM.cost(); 9 cease restrict_fc; 10 / function created. SQL> SQL> -- SQL> -- Execute the characteristic SQL> -- SQL> select restrict_fc FROM dual; RESTRICT_FC ----------- .78662621 performed my_restrict_proc. SQL>

since they did not try to skip the 'security' they worked to enforce the restrained code completed devoid of error. note that they weren't required to declare any unit_kind within the initial attainable by passage of clause, which allowed us to declare the unit_kind in an additional PL/SQL application unit 'down the road'; this makes it less complicated in applications to jot down an accessible by means of clause that can also live reused in other packages or stand-on my own strategies that employ objects of the identical title but having different unit_kind definitions.

Let's now anatomize a package that contains both public (executable by any person in any context) and private (executable simplest by the declared software unit) tactics and spot what occurs when an attempt is made to execute the 'inner most' procedure outside of its declared context:

SQL> SQL> set reflect on linesize a hundred and fifty serveroutput on dimension one million SQL> SQL> -- SQL> -- Create a kit with public and personal procedures SQL> -- SQL> create or substitute package my_top_lvl_pkg as 2 system my_first_lvl_proc; 3 system my_next_lvl_proc obtainable by (system my_top_lvl_proc); 4 conclusion my_top_lvl_pkg; 5 / package created. SQL> SQL> array errors No blunders. SQL> SQL> -- SQL> -- silhouette those techniques and who/what can entry them SQL> -- SQL> create or substitute equipment constitution my_top_lvl_pkg 2 as three process my_first_lvl_proc as four start 5 dbms_output.put_line('done my_top_lvl_pkg.my_first_lvl_proc'); 6 end; 7 system my_next_lvl_proc purchasable by using (method my_top_lvl_proc) as 8 begin 9 dbms_output.put_line('achieved my_top_lvl_pkg.my_next_lvl_proc'); 10 conclusion; eleven conclusion; 12 / kit body created. SQL> SQL> divulge error No blunders. SQL> SQL> -- SQL> -- Create procedure to execute each kit approaches SQL> -- SQL> create or supplant procedure my_top_lvl_proc 2 as three begin 4 dbms_output.put_line('my_top_lvl_proc calls my_top_lvl_pkg.my_next_lvl_proc '); 5 my_top_lvl_pkg.my_next_lvl_proc; 6 conclusion; 7 / procedure created. SQL> SQL> exhibit errors No error. SQL> SQL> -- SQL> -- Execute approaches as supposed, from inside the kit SQL> -- SQL> exec my_top_lvl_proc; my_top_lvl_proc calls my_top_lvl_pkg.my_next_lvl_proc achieved my_top_lvl_pkg.my_next_lvl_proc PL/SQL manner efficaciously completed. SQL> SQL> SQL> -- SQL> -- are attempting to title protected process stand-alone SQL> -- SQL> exec my_top_lvl_pkg.my_next_lvl_proc; start my_top_lvl_pkg.my_next_lvl_proc; conclusion; * ERROR at line 1: ORA-06550: line 1, column 7: PLS-00904: inadequate privilege to entry remonstrate MY_NEXT_LVL_PROC SQL>

We behold that any try and execute MY_NEXT_LVL_PROC by passage of itself generates an error, which keeps it within the desired context so that undesired consequences can't live generated. [As mentioned before some procedures and functions in a package can depend on variables and intermediate results generated by program units within that package; executing program units with such dependencies as 'stand-alone' program units can produce incorrect results.]

Being able to preclude the execution ambiance on PL/SQL software units that depend on positive conditions to live met is a protracted late feature that should live investigated and used with the aid of builders. not will programmers suffer to clarify why a technique or role would not travail accurately when called outdoor of its suppositious atmosphere; it effortlessly may not execute outdoor of the mandatory context. And, to cite Martha Stewart, "it really is an excellent aspect."

See total articles with the aid of David Fitzjarrell


ideas for Unit trying out PL/SQL classes | killexams.com real Questions and Pass4sure dumps

I even suffer currently received a few requests for ideas concerning unit trying out of PL/SQL programs. i thought i might participate with you what I told them.

First, some history: unit testing refers back to the technique of trying out individual subprograms for correctness, as antagonistic to orthodox utility testing (which, at the present time, almost always means journeying a site).

The basic theory in the back of unit testing is that if you examine that each and every particular person subprogram works appropriately, you then are plenty less likely to suffer bugs in larger-degree courses that call those established subprograms. And in the event you do, you know which you could focal point on the style the verified subprograms are used, and never the subprograms themselves.

probably the most vital software of a unit check is to win fraction in a regression examine, which can live elude to check one's code works these days as neatly as it did the previous day. that will significantly gash back the probability of you upgrading the utility and clients complaining that a bunch of features that labored in V1.2 not travail within the fancy, new-and-greater V1.3.

this is total the time embarrassing, appropriate?

When developers talk about unit testing, they are continually now not just speaking about writing and operating a test. they're speaking about finding and the usage of a framework that automates as much of the process as possible. Automation is essential as a result of testing always takes a lot of time and manual trying out takes essentially the most time of all.

And, most dev managers aren't going to provide you with loads of time for checking out. it truly is just the style it's.

here are the leading steps that may well live automated:

  • define the examine circumstances: what are the a number of eventualities that exigency to live established? These are driven by person requirements.
  • build the code that implements the examine cases.
  • install the information so that the test code will elude thoroughly.
  • Run the checks.
  • listing and determine the effects.
  • There are a number of different tools attainable for automatic or semi-computerized unit testing of PL/SQL code. They consist of:

  • utPLSQL: "Junit for PL/SQL" an open source framework that I firstly in-built 1999 and is now managed by using Paul Walker.
  • SQL Developer Unit trying out: Oracle's free PL/SQL IDE presents built-in unit testing.
  • Dell Code Tester for Oracle: a commercial unit trying out device that I at the start designed and helped to build, sold as a fraction of the Toad evolution Suite for Oracle.
  • and then there are a bunch of others, including: DBFit, PL/unit, PLUTO, and ruby-plsql to title a few. i'm not going to feign that I suffer any top notch familiarity with this record of "others." I inspirit you to determine them out; i am going to hub of attention on the large Three. [Note: PL/SQL Developer, another well-liked PL/SQL IDE, has some very basic unit testing features, but not enough to warrant review in this post.]

    And even there, i am not going to tender a particular comparison of aspects. you'll should accomplish this your self, in keeping with your requirements. in its place, i will win a step lower back and tender some excessive-degree assistance to accumulate you began to your adventure.

    utPLSQL

    First, it's crucial to proper a misunderstanding that some americans suffer and the creator of ruby-plsql repeats in his blog: "Steven stopped establishing extra utPLSQL and at the jiffy there are no different lively maintainers of this project." Raimonds is fully usurp that i stopped working on utPLSQL years in the past, and for a long time, it did languish. 

    last yr, despite the fact, Paul Walker stepped up to the plate and took over managing the undertaking. He has been making employ of worm fixes, enhancing documentation, and encouraging discussion and collaboration.

    given that 2006, utPLSQL has been downloaded over 76,000 instances. Of route, there is no passage of realizing how many dev teams employ it, but I suppose it's protected to title there are a all bunch of corporations total over actively counting on utPLSQL.

    utPLSQL is free and provides you complete manage over your check code. but, it really is typically since you should write all of the examine at various code (SQL Developer and Code Tester generate check code for you). after which, you exigency to preserve total that verify code. but when you've written your assessments, built across the utPLSQL API, which you could execute your tests with a lone command, and utPLSQL will inform you no matter if or no longer your code handed (with unit testing, passing comes with 100% correctness).

    utPLSQL verify scripts may also live integrated into continuous integration scripting.

    Code Tester for Oracle

    I feel that it is safe to claim, even given my most likely doubly-subjective viewpoint of (a) being an original designer of Code Tester and (b) now working for "the competition" – Oracle, that Code Tester is probably the most refined computerized trying out appliance for PL/SQL. it live packed crammed with features, handles a lot of complex scenarios (for example, in case your parameter is a set of records and the record consists of a collection of objects, that you may correct interior the UI deliver values for that parameter), generates check code from your requirements, and presents restrained integration with Toad.

    That sophistication comes, youngsters, at a precipitous fee, particularly $2,854 for the Toad edifice Suite for Oracle. You can't buy Code Tester with the aid of itself.

    So, here's my recommendation: when you are licensed to execute employ of the Toad evolution Suite for Oracle (in spite of the fact that you only employ Toad, you may also suffer a license to TDSO by the employ of a website license, and never even realize it), you owe it to your self and your team to win a examine at Code Tester. 

    you'll probably elude into some frustrations and limitations, but it surely does plenty of the weighty lifting for you.

    Code Tester tests can live integrated into continuous integration scripting via a PL/SQL API.

    SQL Developer Unit checking out

    last and definitely now not least, is the unit trying out characteristic integrated at once into SQL Developer. Let's cease usurp there to execute certain you appreciate what I simply mentioned:

    The automated unit testing role of SQL Developer is no longer a sunder device from the editor (which is the case with Code Tester—it is exterior to Toad, with simplest minimal integration points). it's a half of SQL Developer. this is, I accept as real with, an essential aspect as a result of developers accomplish not enjoy to hurry away their editors. in its place, they exigency total integral performance delivered to them inner their editors.

    here is one screenshot from the doc to give you a sense of the integration:

    in lots of approaches, SQL Developer Unit testing and Code Tester for Oracle are an identical. They each remonstrate to win the cross off of you for writing test code. in its place, you describe the examine at various case: What are the input values? What records needs to live deploy? most importantly, what are the expected consequences?

    SQL Developer then generates code that implements your check case. if you should trade the test, you would not suffer to adjust verify code (as you can accomplish with utPLSQL), you hurry into the UI, execute a change, and elude your test once more.

    SQL Dev unit exams can also live integrated into perennial integration scripting.

    So here's my advice: 

    if you are already the employ of SQL Developer, the determination should live clear. are trying the integrated unit testing elements. behold if it meets your needs (at the least adequate to accumulate you going, constructing some exams, experiencing the nice feedback loop). 

    in case you aren't a SQL Developer consumer, as an sample you employ Toad or PL/SQL Developer, and also you are not more likely to accumulate access to Code Tester for Oracle, then I also indicate you installation SQL Developer and check out its unit testing aspects. certain, it might live improved to simply employ one IDE, but if the automatic trying out of SQL Dev works for you, given its infinitely not pricey (as in, free), i might suppose you may warrant having that second IDE round fully for trying out.

    normal Conclusions

    when you suffer access to an IDE that presents computerized unit checking out, together with the technology of check code from check case requirements, are trying that first. The productiveness cogent points of examine at various code technology are so huge, it could easily live expense accepting some obstacles.

    when you are allergic to UI-based trying out and/or live troubled about being confined by passage of an IDE's feature set (in different words, you are a command line fanatic), utPLSQL offers a magnificent option. or not it's proven to live beneficial to lots of and perhaps thousands of dev teams over the years. it is an actively maintained and greater open supply challenge.

    Your event?

    Do you employ an automated checking out framework for PL/SQL? Or suffer you developed your personal? please recount us about your personal event.


    PL/SQL (procedural language extension to Structured question Language) | killexams.com real Questions and Pass4sure dumps

    In Oracle database management, PL/SQL is a procedural language extension to Structured question Language (SQL). The purpose of PL/SQL is to combine database language and procedural programming language. The primary unit in PL/SQL is referred to as a shroud and is made up of three materials: a declarative part, an executable fraction and an exception-building half.

    because PL/SQL allows for clients to fuse SQL statements with procedural constructs, it is viable to employ PL/SQL blocks and subprograms to community SQL statements before sending them to Oracle for execution. devoid of PL/SQL, Oracle exigency to manner SQL statements one at a time. In a community environment, this can impress site visitors hurry and unhurried down response time. PL/SQL blocks will also live compiled as soon as and kept in executable kindly to help response time.

    A PL/SQL application that is stored in a database in compiled kindly and can live known as with the aid of identify is referred to as a saved technique. A PL/SQL stored system it's implicitly started when an INSERT, update or DELETE statement is issued in opposition t an associated table is called a set off.

    How PL/SQL works

    PL/SQL blocks are described via the keyword phrases DECLARE, begin, EXCEPTION and end, which divide the shroud birthright into a declarative part, an executable fraction and an exception-constructing part, respectively. The announcement fraction of the shroud is used to define and initialize constants and variables; if a variable is not initialized, it's going to default to NULL value. Blocks may also live nested and submitted to interactive equipment, enjoy SQL*Plus.

    learn the basics of PL/SQL programming.

    PL/SQL is designed to compute and return a lone scalar cost or a lone assortment, equivalent to a nested table or VARRAY. clients can create their personal functions to complement those supplied by using Oracle. whereas capabilities may also live used in an SQL statement, procedures cannot.

    Examples of PL/SQL elements

    Examples of PL/SQL points encompass cursors, embedded PL/SQL and calling a saved manner.

    Cursors act as tips to the context area. A PL/SQL shroud uses a cursor to manipulate the context enviornment. Cursors can continue to live unnamed or nameless, but named cursors execute retrieval more convenient. Cursors can also live implicit or explicit. Implicit cursors are the default cursors in PL/SQL blocks. they're created in lieu of an explicit cursor, when PL/SQL encounters a choose commentary that returns only one row or when records manipulation language statements, enjoy DELETE, INSERT or update, are encountered. specific cursors supply clients superior manage over the context locality and should live used with a opt for observation question if you want to return a couple of row. each express and implicit cursors suffer the same output, even though their entry is diverse.

    PL/SQL can also live embedded in excessive-degree host languages, enjoy C. Programming tools, enjoy seasoned*COBOL, interpret PL/SQL blocks as single, embedded SQL statements. This allows users to residence PL/SQL blocks any residence in a number application where they might continuously vicinity an SQL observation. When embedding PL/SQL blocks into host classes, execute certain to declare the variables that will live shared with PL/SQL and bracket the PL/SQL shroud with the EXEC SQL EXECUTE and conclusion-EXEC keywords, in response to Oracle documentation.

    After a Java saved process has been loaded and posted, clients can call it. clients can hook up with Oracle with the professional*C software. once the proper statistics is entered, the software will immediately assign total row values within the index-by passage of tables to corresponding facets in the host arrays. The application will repeatedly call the manner and array each and every batch of information until no greater facts is found, based on Oracle's PL/SQL user's e bespeak and Reference release 2 (9.2).

    merits of PL/SQL

    PL/SQL is compatible with SQL. as a result of this taut integration of both programs, PL/SQL allows users to utilize total SQL facts manipulation, cursor manage, transaction statements and total other SQL functions, operators and pseudo-columns. users don't look to live required to transform between PL/SQL and SQL statistics forms. moreover, PL/SQL supports each static and dynamic SQL.

    PL/SQL makes it practicable for users to ship a shroud of statements to the database, which greatly reduces site visitors between the app and the database. it is additionally practicable to elude PL/SQL on any operating device (OS) or platform where Oracle Database runs.

    When saved in subprograms, PL/SQL increases scalability with the aid of centralizing entry processing on the database server. The reminiscence amenities of the shared server enable Oracle Database to aid several concurrent clients on a lone node, according to Oracle.

    clients can hold only one replica of a subprogram on the database server in its residence of assorted copies on every client gadget. This increases manageability. Many apps can utilize the subprograms, and users can alter them without affecting the apps that employ them.

    PL/SQL additionally enables users to create functions that generate webpages directly from the database. This enables users to execute their databases available on the net.

    PL/SQL Server Pages allow clients to multiply webpages and are an alternative to coding a kept subprogram that writes the HTML code one line at a time. total through construction, PL/SQL Server Pages are used as templates, and clients can design layouts and write PL/SQL scripts to generate the content material.

    PL/SQL vs. SQL

    unlike SQL, PL/SQL is fully unique to Oracle, although it is never an industry regular, as no different product makes employ of it. PL/SQL is akin to nonobject-oriented procedural programming languages, enjoy C or Pascal, and its roots hint lower back to Ada.

    SQL and PL/SQL are tremendously diverse programming languages. even though it is proscribed, SQL allows clients to without detain suffer interaction with a database. users are capable of employ SQL to manipulate objects and records, but SQL would not encompass loops or IF/THEN statements. PL/SQL contains the entire aspects of programming languages and integrates readily with SQL.

    The differences between PL/SQL and SQL 6 essential distinctions between PL/SQL and SQL

    while SQL is regarded a source of information for studies, webpages and screens, PL/SQL is considered as an utility language corresponding to Java and personal home page. PL/SQL can also live used to construct, format and divulge reviews, webpages and screens.


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    Develop PL/SQL Program Units

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    Oracle's Newest PL/SQL Feature 'ACCESSIBLE BY' | killexams.com real questions and Pass4sure dumps

    Oracle has offered packages for a while now, but until recently it's been difficult, if not impossible, to avert 'out of context' execution of functions and procedures; in many cases package code is designed to live used within the context of the package, not as stand-alone procedures and functions. In release 12.2.0.1, Oracle has addressed this issue with the ACCESSIBLE BY clause. This clause allows developers to refine the scope of a procedure or role call and generate an oversight message when that procedure or role is called outside of the package context. Let's build an sample to illustrate how this is written and what results are obtained when the context-restricted code is executed in context and out.

    ACCESSIBLE BY can restrict specific types of program units or named program units of an unspecified type. The syntax for the clause is:

    ACCESSIBLE BY ([unit_kind] [schema.]unit_name)

    ...where [unit_kind] is an optional parameter indicating PROCEDURE, FUNCTION, PACKAGE, TRIGGER or TYPE, [schema] is the schema where the unit is located and unit_name is the title of the procedure, role or package having restricted access. When [unit_kind] is supplied then a particular package, procedure, function, trigger or nature can only live called or used from within the defined context. When [unit_kind] is NOT supplied then any of the listed types can live referenced as long as they suffer the declared unit_name. We'll start with an access by title example:

    SQL> -- SQL> -- Create a procedure only accessible SQL> -- by a named object SQL> -- SQL> -- remonstrate can suffer any supported type SQL> -- SQL> create or supplant procedure my_restrict_proc 2 accessible by (restrict_fc) 3 as 4 begin 5 dbms_output.put_line('Executed my_restrict_proc.'); 6 end; 7 / Procedure created. SQL> SQL> -- SQL> -- Create a role only accessible SQL> -- by a trigger SQL> -- SQL> create or supplant role top_protected_f return number 2 accessible by (trigger restrict_fc ) as 3 begiN 4 return 1.27349; 5 cease top_protected_f; 6 / Function created. SQL> SQL> -- SQL> -- Create a function SQL> -- SQL> -- role calls the procedure that can call SQL> -- the unit having the restricted name SQL> -- SQL> create or supplant role restrict_fc return NUMBER AUTHID DEFINER IS 2 role g return NUMBER DETERMINISTIC IS 3 BEGIN 4 return 1.27349; 5 cease g; 6 BEGIN 7 my_restrict_proc; 8 return g() - DBMS_RANDOM.VALUE(); 9 cease restrict_fc; 10 / Function created. SQL> SQL> -- SQL> -- Execute the role SQL> -- SQL> SELECT restrict_fc FROM DUAL; RESTRICT_FC ----------- .78662621 Executed my_restrict_proc. SQL>

    Since they didn't try to bypass the 'security' they worked to implement the restricted code executed without error. Notice that they weren't required to declare any unit_kind in the initial ACCESSIBLE BY clause, which allowed us to declare the unit_kind in another PL/SQL program unit 'down the line'; this makes it easier in packages to write an ACCESSIBLE BY clause that can live reused in other packages or stand-alone procedures that employ objects of the same title but having different unit_kind definitions.

    Let's now examine at a package that contains both public (executable by anyone in any context) and private (executable only by the declared program unit) procedures and behold what happens when an attempt is made to execute the 'private' procedure outside of its declared context:

    SQL> SQL> set reflect on linesize 150 serveroutput on size 1000000 SQL> SQL> -- SQL> -- Create a package with public and private procedures SQL> -- SQL> create or supplant package my_top_lvl_pkg as 2 procedure my_first_lvl_proc; 3 procedure my_next_lvl_proc accessible by (procedure my_top_lvl_proc); 4 cease my_top_lvl_pkg; 5 / Package created. SQL> SQL> demonstrate errors No errors. SQL> SQL> -- SQL> -- Define those procedures and who/what can access them SQL> -- SQL> create or supplant package body my_top_lvl_pkg 2 as 3 procedure my_first_lvl_proc as 4 begin 5 dbms_output.put_line('Executed my_top_lvl_pkg.my_first_lvl_proc'); 6 end; 7 procedure my_next_lvl_proc accessible by (procedure my_top_lvl_proc) as 8 begin 9 dbms_output.put_line('Executed my_top_lvl_pkg.my_next_lvl_proc'); 10 end; 11 end; 12 / Package body created. SQL> SQL> demonstrate errors No errors. SQL> SQL> -- SQL> -- Create procedure to execute both package procedures SQL> -- SQL> create or supplant procedure my_top_lvl_proc 2 as 3 begin 4 dbms_output.put_line('my_top_lvl_proc calls my_top_lvl_pkg.my_next_lvl_proc '); 5 my_top_lvl_pkg.my_next_lvl_proc; 6 end; 7 / Procedure created. SQL> SQL> demonstrate errors No errors. SQL> SQL> -- SQL> -- Execute procedures as intended, from within the package SQL> -- SQL> exec my_top_lvl_proc; my_top_lvl_proc calls my_top_lvl_pkg.my_next_lvl_proc Executed my_top_lvl_pkg.my_next_lvl_proc PL/SQL procedure successfully completed. SQL> SQL> SQL> -- SQL> -- Try to call protected procedure stand-alone SQL> -- SQL> exec my_top_lvl_pkg.my_next_lvl_proc; BEGIN my_top_lvl_pkg.my_next_lvl_proc; END; * ERROR at line 1: ORA-06550: line 1, column 7: PLS-00904: insufficient privilege to access remonstrate MY_NEXT_LVL_PROC SQL>

    We behold that any attempt to execute MY_NEXT_LVL_PROC by itself generates an error, which keeps it in the desired context so that undesired results cannot live generated. [As mentioned before some procedures and functions in a package can depend on variables and intermediate results generated by program units within that package; executing program units with such dependencies as 'stand-alone' program units can produce incorrect results.]

    Being able to restrict the execution environment on PL/SQL program units that depend on inevitable conditions to live met is a long overdue feature that should live investigated and used by developers. No longer will programmers suffer to account for why a procedure or role doesn't travail properly when called outside of its intended environment; it simply won't execute outside of the required context. And, to quote Martha Stewart, "That's a cogent thing."

    See total articles by David Fitzjarrell


    Recommendations for Unit Testing PL/SQL Programs | killexams.com real questions and Pass4sure dumps

    I suffer recently received a couple of requests for recommendations regarding unit testing of PL/SQL programs. I thought I would participate with you what I told them.

    First, some background: unit testing refers to the process of testing individual subprograms for correctness, as opposed to overall application testing (which, these days, almost always means visiting a website).

    The basic concept behind unit testing is that if you verify that each individual subprogram works correctly, then you are much less likely to suffer bugs in higher-level programs that call those tested subprograms. And when you do, you know you can focus on the passage the tested subprograms are used, and not the subprograms themselves.

    The most essential application of a unit test is to participate in a regression test, which can live elude to verify one's code works today as well as it did yesterday. That will greatly reduce the casual of you upgrading the application and users complaining that a bunch of features that worked in V1.2 no longer travail in the fancy, new-and-improved V1.3.

    That's always embarrassing, right?

    When developers talk about unit testing, they are usually not just talking about writing and running a test. They are talking about finding and using a framework that automates as much of the process as possible. Automation is key because testing always takes a lot of time and manual testing takes the most time of all.

    And, most dev managers are not going to give you lots of time for testing. That's just the passage it is.

    Here are the main steps that could live automated:

  • Define the test cases: what are the various scenarios that exigency to live verified? These are driven by user requirements.
  • Build the code that implements the test cases.
  • Set up the data so that the test code will elude properly.
  • Run the tests.
  • Record and examine the results.
  • There are a number of different tools available for automated or semi-automated unit testing of PL/SQL code. They include:

  • utPLSQL: "Junit for PL/SQL" an open source framework that I originally built in 1999 and is now managed by Paul Walker.
  • SQL Developer Unit Testing: Oracle's free PL/SQL IDE offers integrated unit testing.
  • Dell Code Tester for Oracle: a commercial unit testing appliance that I originally designed and helped to build, sold as fraction of the Toad evolution Suite for Oracle.
  • And then there are a bunch of others, including: DBFit, PL/unit, PLUTO, and ruby-plsql to title a few. I am not going to feign that I suffer any noteworthy familiarity with this list of "others." I inspirit you to check them out; I am going to focus on the mountainous Three. [Note: PL/SQL Developer, another well-liked PL/SQL IDE, has some very basic unit testing features, but not enough to warrant review in this post.]

    And even there, I am not going to tender a particular comparison of features. You will exigency to accomplish that yourself, based on your requirements. Instead, I will win a step back and tender some high-level guidance to accumulate you started on your journey.

    utPLSQL

    First, it is essential to redress a misunderstanding that some people suffer and the creator of ruby-plsql repeats in his blog: "Steven stopped developing further utPLSQL and currently there are no other energetic maintainers of this project." Raimonds is absolutely redress that I stopped working on utPLSQL years ago, and for a while, it did languish. 

    Last year, however, Paul Walker stepped up to the plate and took over managing the project. He has been applying bug fixes, improving documentation, and encouraging discussion and collaboration.

    Since 2006, utPLSQL has been downloaded over 76,000 times. Of course, there's no passage of knowing how many dev teams employ it, but I believe it is safe to elucidate there are hundreds of groups around the world actively relying on utPLSQL.

    utPLSQL is free and gives you total control over your test code. But, that's mostly because you suffer to write all the test code (SQL Developer and Code Tester generate test code for you). And then, you suffer to maintain total that test code. But once you've written your tests, built around the utPLSQL API, you can execute your tests with a lone command, and utPLSQL will recount you whether or not your code passed (with unit testing, passing comes with 100% correctness).

    utPLSQL test scripts can live integrated into continuous integration scripting.

    Code Tester for Oracle

    I believe that it is safe to say, even given my perhaps doubly-subjective perspective of (a) being an original designer of Code Tester and (b) now working for "the competition" – Oracle, that Code Tester is the most sophisticated automated testing appliance for PL/SQL. It's packed plenary of features, handles lots of complex scenarios (for example, if your parameter is a collection of records and the record contains a collection of objects, you can right inside the UI provide values for that parameter), generates test code from your specifications, and offers limited integration with Toad.

    That sophistication comes, however, at a precipitous price, namely $2,854 for the Toad evolution Suite for Oracle. You can't buy Code Tester by itself.

    So, here's my recommendation: if you are licensed to employ the Toad evolution Suite for Oracle (even if you only employ Toad, you may suffer a license to TDSO via a site license, and not even know it), you owe it to yourself and your team to check out Code Tester. 

    You will likely elude into some frustrations and limitations, but it does an execrable lot of the weighty lifting for you.

    Code Tester tests can live integrated into continuous integration scripting via a PL/SQL API.

    SQL Developer Unit Testing

    Last and definitely not least, is the unit testing feature integrated directly into SQL Developer. Let's cease birthright there to execute certain you appreciate what I just said:

    The automated unit testing feature of SQL Developer is not a sunder appliance from the editor (which is the case with Code Tester—it is external to Toad, with only minimal integration points). It is a part of SQL Developer. This is, I believe, a crucial point because developers accomplish not enjoy to leave their editors. Instead, they want total necessary functionality brought to them inside their editors.

    Here is one screenshot from the doc to give you a sense of the integration:

    In many ways, SQL Developer Unit Testing and Code Tester for Oracle are similar. They both train to win the cross off of you for writing test code. Instead, you describe the test case: What are the input values? What data needs to live set up? Most importantly, what are the expected outcomes?

    SQL Developer then generates code that implements your test case. If you exigency to change the test, you don't suffer to modify test code (as you would accomplish with utPLSQL), you hurry into the UI, execute a change, and elude your test again.

    SQL Dev unit tests can also live integrated into continuous integration scripting.

    So here's my recommendation: 

    If you are already using SQL Developer, the determination should live clear. Try the integrated unit testing features. behold if it meets your needs (at least enough to accumulate you going, edifice some tests, experiencing the positive feedback loop). 

    If you are not a SQL Developer user, let's elucidate you employ Toad or PL/SQL Developer, and you are not likely to accumulate access to Code Tester for Oracle, then I also insinuate you install SQL Developer and try its unit testing features. Sure, it would live better to just employ one IDE, but if the automated testing of SQL Dev works for you, given its infinitely low cost (as in, free), I would believe you could warrant having that second IDE around solely for testing.

    Overall Conclusions

    If you suffer access to an IDE that offers automated unit testing, including the generation of test code from test case specifications, try that first. The productivity gains of test code generation are so massive, it can easily live worth accepting some limitations.

    If you are allergic to UI-based testing and/or worry about being constrained by an IDE's feature set (in other words, you are a command line fanatic), utPLSQL offers a powerful alternative. It's proven to live useful to hundreds and maybe thousands of dev teams over the years. It is an actively maintained and enhanced open source project.

    Your Experience?

    Do you employ an automated testing framework for PL/SQL? Or suffer you built your own? please recount us about your own experience.


    PL/SQL (procedural language extension to Structured Query Language) | killexams.com real questions and Pass4sure dumps

    In Oracle database management, PL/SQL is a procedural language extension to Structured Query Language (SQL). The purpose of PL/SQL is to combine database language and procedural programming language. The basic unit in PL/SQL is called a shroud and is made up of three parts: a declarative part, an executable fraction and an exception-building part.

    Because PL/SQL enables users to fuse SQL statements with procedural constructs, it is practicable to employ PL/SQL blocks and subprograms to group SQL statements before sending them to Oracle for execution. Without PL/SQL, Oracle must process SQL statements one at a time. In a network environment, this can impress traffic rush and unhurried down response time. PL/SQL blocks can live compiled once and stored in executable profile to help response time.

    A PL/SQL program that is stored in a database in compiled profile and can live called by title is referred to as a stored procedure. A PL/SQL stored procedure that is implicitly started when an INSERT, UPDATE or DELETE statement is issued against an associated table is called a trigger.

    How PL/SQL works

    PL/SQL blocks are defined by the keywords DECLARE, BEGIN, EXCEPTION and END, which divide the shroud into a declarative part, an executable fraction and an exception-building part, respectively. The declaration section of the shroud is used to define and initialize constants and variables; if a variable is not initialized, it will default to NULL value. Blocks can live nested and submitted to interactive tools, enjoy SQL*Plus.

    Learn the basics of PL/SQL programming.

    PL/SQL is designed to compute and return a lone scalar value or a lone collection, such as a nested table or VARRAY. Users can create their own functions to supplement those provided by Oracle. While functions can live used in an SQL statement, procedures cannot.

    Examples of PL/SQL features

    Examples of PL/SQL features include cursors, embedded PL/SQL and calling a stored procedure.

    Cursors act as pointers to the context area. A PL/SQL shroud uses a cursor to control the context area. Cursors can remain unnamed or anonymous, but named cursors execute retrieval easier. Cursors can live implicit or explicit. Implicit cursors are the default cursors in PL/SQL blocks. They are created in lieu of an explicit cursor, when PL/SQL encounters a SELECT statement that returns just one row or when data manipulation language statements, enjoy DELETE, INSERT or UPDATE, are encountered. explicit cursors accord users better control over the context locality and should live used with a SELECT statement query that will return more than one row. Both explicit and implicit cursors suffer the same output, even though their access is different.

    PL/SQL can live embedded in high-level host languages, enjoy C. Programming tools, enjoy Pro*COBOL, interpret PL/SQL blocks as single, embedded SQL statements. This enables users to residence PL/SQL blocks anywhere in a host program where they might normally residence an SQL statement. When embedding PL/SQL blocks into host programs, live certain to declare the variables that will live shared with PL/SQL and bracket the PL/SQL shroud with the EXEC SQL EXECUTE and END-EXEC keywords, according to Oracle documentation.

    After a Java stored procedure has been loaded and published, users can call it. Users can connect to Oracle with the Pro*C program. Once the proper data is entered, the program will automatically assign total row values in the index-by tables to corresponding elements in the host arrays. The program will repeatedly call the procedure and array each batch of data until no more data is found, according to Oracle's PL/SQL User's guide and Reference Release 2 (9.2).

    Advantages of PL/SQL

    PL/SQL is compatible with SQL. Because of this taut integration of the two programs, PL/SQL enables users to utilize total SQL data manipulation, cursor control, transaction statements and total other SQL functions, operators and pseudo-columns. Users aren't required to convert between PL/SQL and SQL data types. Additionally, PL/SQL supports both static and dynamic SQL.

    PL/SQL enables users to ship a shroud of statements to the database, which significantly reduces traffic between the app and the database. It is also practicable to elude PL/SQL on any operating system (OS) or platform where Oracle Database runs.

    When stored in subprograms, PL/SQL increases scalability by centralizing access processing on the database server. The memory facilities of the shared server enable Oracle Database to advocate multiple concurrent users on a lone node, according to Oracle.

    Users can maintain only one copy of a subprogram on the database server instead of multiple copies on each client system. This increases manageability. Many apps can utilize the subprograms, and users can alter them without affecting the apps that employ them.

    PL/SQL also enables users to create applications that generate webpages directly from the database. This enables users to execute their databases available on the web.

    PL/SQL Server Pages enable users to develop webpages and are an alternative to coding a stored subprogram that writes the HTML code one line at a time. During development, PL/SQL Server Pages are used as templates, and users can design layouts and write PL/SQL scripts to generate the content.

    PL/SQL vs. SQL

    Unlike SQL, PL/SQL is completely unique to Oracle, although it isn't an industry standard, as no other product uses it. PL/SQL is similar to nonobject-oriented procedural programming languages, enjoy C or Pascal, and its roots vestige back to Ada.

    SQL and PL/SQL are significantly different programming languages. Although it is limited, SQL enables users to directly interact with a database. Users are able to employ SQL to manipulate objects and data, but SQL doesn't include loops or IF/THEN statements. PL/SQL includes total the features of programming languages and integrates easily with SQL.

    The differences between PL/SQL and SQL 6 essential distinctions between PL/SQL and SQL

    While SQL is considered a source of data for reports, webpages and screens, PL/SQL is viewed as an application language similar to Java and PHP. PL/SQL can live used to build, format and array reports, webpages and screens.



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