Oracle Database 11 g - Online Public Access Catalog

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472 CHAPTER 11 ■ APPLICATION DEVELOPMENTinsert into donationsselect 1,'John Q Public',100,'101 Main St.',null,null,'Anytown','ST','0000000','US','111-555-3333','jqpublic@email.net'from dualunion allselect 2,'Percival Lowell',200,'100 Cactus Ln',null,null,'Flagstaff','AZ','86001','US','928-555-0000','plowell@email.net'from dualunion allselect 3,'Jane Doe',400,'101 Elm',null,null,'Peaceville',null,'0000000','US','333-555-2222','jdoe@email.net'from dual;Running yields the following:Donor: John Q Public Amount: 100Donor: Percival Lowell Amount: 200Donor: Jane Doe Amount: 400Changing Jane Doe’s donation amount to –400 causes the following to be output:SQL Error: ORA-20001: Donations must be positiveORA-06512: at "DEMO.DONATION_INS_TRG", line 17ORA-04088: error during execution of trigger 'DEMO.DONATION_INS_TRG'The after trigger did not fire. Returning the donation amount to 400 and executing againyields the following:Donor: John Q Public Amount: 100Donor: Percival Lowell Amount: 200Donor: Jane Doe Amount: 400If this were written as a simple trigger, there would have been five lines listed since thedeclaration of messQueue also initialized the variable.Compound triggers behave a little differently when used with FORALL statements. Thefollowing shows the prior example written as a PL/SQL anonymous block that creates therecords in the PL/SQL table and uses FORALL to bulk insert them:declareTYPE donTab_t IS TABLE OF donations%ROWTYPE;SUBTYPE donRec_t IS donations%ROWTYPE;donArr donTab_t:=donTab_t();FUNCTION newDonRec_t(donation_id IN PLS_INTEGER,doner_name IN VARCHAR2,donation_amount IN NUMBER,address_1 IN VARCHAR2,address_2 IN VARCHAR2,address_3 IN VARCHAR2,city IN VARCHAR2,state IN VARCHAR2,postal_code IN VARCHAR2,country IN VARCHAR2,phone IN VARCHAR2,email IN VARCHAR2)RETURN donRec_t IStmp donRec_t;
CHAPTER 11 ■ APPLICATION DEVELOPMENT 473BEGINtmp.donation_id:=donation_id;tmp.donor_name:=doner_name;tmp.donation_amount:=donation_amount;tmp.address_1:=address_1;tmp.address_2:=address_2;tmp.address_3:=address_3;tmp.city:=city;tmp.state:=state;tmp.postal_code:=postal_code;tmp.country:=country;tmp.phone:=phone;tmp.email:=email;return tmp;END;BEGINdonArr.EXTEND;donArr(donArr.LAST):=newDonRec_t(donations_s.nextval,'John Q Public',100,'101 Main St.',null,null,'Anytown','ST','0000000','US','111-555-3333','jqpublic@email.net');donArr.EXTEND;donArr(donArr.LAST):=newDonRec_t(donations_s.nextval,'Percival Lowell',200,'100 Cactus Ln',null,null,'Flagstaff','AZ','86001','US','928-555-0000','plowell@email.net');donArr.EXTEND;donArr(donArr.LAST):=newDonRec_t(donations_s.nextval,'Jane Doe',400,'101 Elm',null,null,'Peaceville','ST','0000000','US','333-555-2222','jdoe@email.net');-- insert the recordsFORALL I IN 1..donArr.COUNTINSERT INTO donations VALUES donArr(i);END;/The function newDonRec_t() initializes a record of type donations%RECTYPE. When thisblock is executed, the same result is seen. However, when you change Jan Doe’s donationamount to –400 as before, the following is emitted:ORA-20001: Donations must be positiveORA-06512: at "DEMO.DONATION_INS_TRG", line 17ORA-04088: error during execution of trigger 'DEMO.DONATION_INS_TRG'ORA-06512: at line 36Donor: John Q Public Amount: 100Donor: Percival Lowell Amount: 200
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The EXPERT’s VOIce ® IN ORACLEAl
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Contents at a GlanceAbout the Autho
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■CONTENTSixSQL*Plus New Features
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■CONTENTSxiEnterprise Manager Int
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■CONTENTSxiiiCombined Capture and
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■CONTENTSxvImprovements in Redo T
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About the Authors■SAM ALAPATI is
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xxii■ACKNOWLEDGMENTSNothing I do
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xxiv■INTRODUCTIONPerformance Mana
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xxvi■INTRODUCTION• The easy add
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2 CHAPTER 1 ■ INSTALLING, UPGRADI
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226 CHAPTER 5 ■ DATABASE SECURITY
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CHAPTER 7■ ■ ■Data PumpDBAs a
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CHAPTER 7 ■ DATA PUMP 315if test
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CHAPTER 7 ■ DATA PUMP 319Encrypti
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CHAPTER 7 ■ DATA PUMP 323Remappin
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CHAPTER 7 ■ DATA PUMP 325SELECT d
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CHAPTER 7 ■ DATA PUMP 333DBMS_OUT
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CHAPTER 9■ ■ ■Storage Managem
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416 CHAPTER 10 ■ DATA GUARD• Lo
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600 ■INDEXOracle Audit Vault, 259
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