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Rather than perform that check four times in the code for each input parameter, we do it once in this procedure: 7 8 9 10 11 12 13 14 15 procedure bind_variable( p_name in varchar2, p_value in varchar2 ) is begin if ( p_name is not null ) then dbms_sqlbind_variable( g_cursor, p_name, p_value ); end if; end;.

The configure script will look for SQLite and the JDK in several default locations. However, to explicitly specify where to look for SQLite and the JDK, several command-line options are available. --with-sqlite=DIR to specify the sqlite v2 location --with-sqlite3=DIR to specify the sqlite v3 location --with-jdk=DIR to specify the JDK location. To specify the place where the resulting library should be installed (libsqlite_jni.so file), use the -prefix=DIR option. The default location is /usr/lib/jvm/java-6-sun/jre/lib/i386 (though this may vary depending on your distribution of Linux or use of another Unix flavor or Mac OS X, such as /usr/local/lib, for example.) To specify where the sqlite.jar is to be installed, use the --withjardir=DIR option. The default is /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/ext/sqlite.jar (again, this may vary depending on the age and type of your distribution). This file contains the high-level part and the JDBC driver. At runtime, it is necessary to tell the JVM both places with the -classpath and Djava.library.path=.. command-line options. For Windows, the makefiles javasqlite.mak and javasqlite3.mak are provided in the distribution. They contain some build instructions and use the J2SE 1.4.2 from Sun and Microsoft Visual C++ 6.0. A DLL with the native JNI part (including SQLite 3.7.0) and the JAR file with the Java part can be downloaded from the web site.

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Next is the actual implementation of SUBSTR_OF in the package body. This routine begins with a function declaration from the package specification and the declaration for some local variables. L_BUFFER will be used to return the value, and L_BUFFER_LEN will be used to hold the length returned by an Oracle-supplied function: 16 17 18 19 20 21 22 23 24 25 26 27 28 function substr_of ( p_query in varchar2, p_from in number, p_for in number, p_name1 in varchar2 default p_bind1 in varchar2 default p_name2 in varchar2 default p_bind2 in varchar2 default p_name3 in varchar2 default p_bind3 in varchar2 default p_name4 in varchar2 default p_bind4 in varchar2 default

NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL )

Caution Use Paste Special Values with caution if other cells are in the range that contain formulas.

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You connect to a database using SQLiteDatabase::open(), which takes the name of the database and the file mode, as shown in Listing 8-16. The file mode is an artifact from SQLite 2 API and is no longer used. You can provide any value to satisfy the function. The code in Listing 8-16 is taken from the example file SQLiteJNIExample.java. The full code from this example illustrates all the main facets of database operations: connecting, querying, using functions, and so forth. Listing 8-16. The JavaSQLite Test Program import SQLite.*; public class SQLiteJNIExample { public static void main(String args[]) { SQLite.Database db = new SQLite.Database(); try {

varchar2(4000); number;

Now, the first thing our code does is a sanity check on the P_FROM and P_FOR inputs. P_FROM must be a number greater than or equal to 1, and P_FOR must be between 1 and 4,000 just like the built-in function SUBSTR: 34 35 36 37 38 39 40 41 42 43 44 if ( nvl(p_from,0) <= 0 ) then raise_application_error (-20002, 'From must be >= 1 (positive numbers)' ); end if; if ( nvl(p_for,0) not between 1 and 4000 ) then raise_application_error (-20003, 'For must be between 1 and 4000' ); end if;

To make the pivot table easier to read, you d like each outer row field item to be followed by a blank row. When you try to insert rows in the pivot table, you get an error message that says you cannot insert rows. This example is based on the Regions.xlsx workbook.

db.open("foods.db", 700); // Trace SQL statements db.trace(new SQLTrace()); // Query example query(db); // Function example user_defined_function(db); // Aggregate example user_defined_aggregate(db);

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