crystal reports barcode 128 free Long Types in Objective-C

Printer Data Matrix in Objective-C Long Types

Long Types
Data Matrix ECC200 Generator In Objective-C
Using Barcode maker for iPhone Control to generate, create Data Matrix 2d barcode image in iPhone applications.
www.OnBarcode.com
Barcode Maker In Objective-C
Using Barcode creator for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
LONG types come in two flavors in Oracle: A LONG text type capable of storing 2GB of text. The text stored in the LONG type is subject to character set conversion, much like a VARCHAR2 or CHAR type. A LONG RAW type capable of storing 2GB of raw binary data (data that is not subject to character set conversion).
UPC Code Generation In Objective-C
Using Barcode generation for iPhone Control to generate, create GS1 - 12 image in iPhone applications.
www.OnBarcode.com
GS1 128 Encoder In Objective-C
Using Barcode creator for iPhone Control to generate, create GTIN - 128 image in iPhone applications.
www.OnBarcode.com
The LONG types date back to version 6 of Oracle, when they were limited to 64KB of data. In version 7, they were enhanced to support up to 2GB of storage, but by the time version 8 was released, they were superceded by the LOB types, which we will discuss shortly. Rather than explain how to use the LONG type, I will explain why you do not want to use the LONG (or LONG RAW) type in your applications. First and foremost, the Oracle documentation is very clear in its treatment of the LONG types. The Oracle SQL Reference manual states the following:
Generate UPC - 13 In Objective-C
Using Barcode creator for iPhone Control to generate, create GS1 - 13 image in iPhone applications.
www.OnBarcode.com
Barcode Printer In Objective-C
Using Barcode printer for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
Do not create tables with LONG columns. Use LOB columns (CLOB, NCLOB, BLOB) instead. LONG columns are supported only for backward compatibility.
Drawing Data Matrix ECC200 In Objective-C
Using Barcode maker for iPhone Control to generate, create Data Matrix ECC200 image in iPhone applications.
www.OnBarcode.com
Print UPCE In Objective-C
Using Barcode generation for iPhone Control to generate, create Universal Product Code version E image in iPhone applications.
www.OnBarcode.com
Restrictions on LONG and LONG RAW Types
DataMatrix Drawer In C#.NET
Using Barcode creator for .NET Control to generate, create ECC200 image in .NET applications.
www.OnBarcode.com
Data Matrix ECC200 Decoder In Visual Basic .NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
The LONG and LONG RAW types are subject to the restrictions outlined in Table 12-2. Even though it might be considered jumping ahead, I ve added a column to say whether the corresponding LOB type, which is the replacement for the LONG/LONG RAW types, is subject to the same restriction.
Code-128 Maker In None
Using Barcode creator for Microsoft Excel Control to generate, create Code-128 image in Office Excel applications.
www.OnBarcode.com
USS Code 128 Creation In VB.NET
Using Barcode maker for VS .NET Control to generate, create USS Code 128 image in VS .NET applications.
www.OnBarcode.com
CHAPTER 12 DATATYPES
Making GS1 - 13 In Java
Using Barcode creator for Android Control to generate, create European Article Number 13 image in Android applications.
www.OnBarcode.com
PDF417 Generator In Java
Using Barcode generation for Android Control to generate, create PDF417 image in Android applications.
www.OnBarcode.com
Table 12-2. Long Types Compared to LOBs LONG/LONG RAW Type You may have only one LONG or LONG RAW column per table. User-defined types may not be defined with attributes of type LONG/LONG RAW. LONG types may not be referenced in the WHERE clause. CLOB/BLOB Type You may have up to 1,000 columns of CLOB or BLOB type per table. User-defined types may fully use CLOB and BLOB types. LOBs may be referenced in the WHERE clause, and a host of functions is supplied in the DBMS_LOB package to manipulate them. LOBs do support distributed transactions.
UPC-A Creator In Java
Using Barcode drawer for Android Control to generate, create UPCA image in Android applications.
www.OnBarcode.com
PDF417 Printer In None
Using Barcode creator for Online Control to generate, create PDF417 image in Online applications.
www.OnBarcode.com
LONG types do not support distributed transactions. LONG types cannot be replicated using basic or advanced replication. LONG columns cannot be in a GROUP BY, ORDER BY, or CONNECT BY, or in a query that uses DISTINCT, UNIQUE, INTERSECT, MINUS, or UNION. PL/SQL functions/procedures cannot accept an input of type LONG. SQL built-in functions cannot be used against LONG columns (e.g., SUBSTR). You cannot use a LONG type in a CREATE TABLE AS SELECT statement. You cannot use ALTER TABLE MOVE on a table containing LONG types.
QR Code Drawer In None
Using Barcode creation for Online Control to generate, create Quick Response Code image in Online applications.
www.OnBarcode.com
PDF-417 2d Barcode Printer In VS .NET
Using Barcode encoder for VS .NET Control to generate, create PDF-417 2d barcode image in .NET framework applications.
www.OnBarcode.com
LOBs fully support replication.
Recognize Barcode In .NET Framework
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Print Data Matrix ECC200 In None
Using Barcode creator for Software Control to generate, create ECC200 image in Software applications.
www.OnBarcode.com
LOBs may appear in these clauses provided a function is applied to the LOB that converts it into a scalar SQL type such as a VARCHAR2, NUMBER, or DATE. PL/SQL works fully with LOB types.
SQL functions may be used against LOB types.
LOBs support CREATE TABLE AS SELECT.
You may move tables containing LOBs.
As you can see, Table 12-2 presents quite a long list; there are many things you just cannot do when you have a LONG column in the table. For all new applications, do not even consider using the LONG type. Instead, use the appropriate LOB type. For existing applications, you should seriously consider converting the LONG type to the corresponding LOB type if you are hitting any of the restrictions in Table 12-2. Care has been taken to provide backward compatibility so that an application written for LONG types will work against the LOB type transparently.
Note It almost goes without saying that you should perform a full functionality test against your application(s)
before modifying your production system from LONG to LOB types.
CHAPTER 12 DATATYPES
Coping with Legacy LONG Types
A question that arises frequently is, What about the data dictionary in Oracle It is littered with LONG columns, and this makes using the dictionary columns problematic. For example, it is not possible using SQL to search the ALL_VIEWS dictionary view to find all views that contain the text HELLO: ops$tkyte@ORA11GR2> select * 2 from all_views 3 where text like '%HELLO%'; where text like '%HELLO%' * ERROR at line 3: ORA-00932: inconsistent datatypes: expected NUMBER got LONG This issue is not limited to the ALL_VIEWS view; many views are affected: ops$tkyte@ORA11GR2> select table_name, column_name 2 from dba_tab_columns 3 where data_type in ( 'LONG', 'LONG RAW' ) 4 and owner = 'SYS' 5 and table_name like 'DBA%'; TABLE_NAME -----------------------------DBA_ADVISOR_SQLPLANS DBA_ARGUMENTS DBA_CLUSTER_HASH_EXPRESSIONS DBA_CONSTRAINTS DBA_IND_EXPRESSIONS DBA_IND_PARTITIONS DBA_IND_SUBPARTITIONS DBA_MVIEWS DBA_MVIEW_AGGREGATES DBA_MVIEW_ANALYSIS DBA_NESTED_TABLE_COLS DBA_OUTLINES DBA_REGISTERED_MVIEWS DBA_REGISTERED_SNAPSHOTS DBA_SNAPSHOTS DBA_SQLSET_PLANS DBA_SQLTUNE_PLANS DBA_SUBPARTITION_TEMPLATES DBA_SUMMARIES DBA_SUMMARY_AGGREGATES DBA_TAB_COLS DBA_TAB_COLUMNS DBA_TAB_PARTITIONS DBA_TAB_SUBPARTITIONS DBA_TRIGGERS DBA_VIEWS DBA_VIEWS_AE 27 rows selected. COLUMN_NAME -----------------------------OTHER DEFAULT_VALUE HASH_EXPRESSION SEARCH_CONDITION COLUMN_EXPRESSION HIGH_VALUE HIGH_VALUE QUERY MEASURE QUERY DATA_DEFAULT SQL_TEXT QUERY_TXT QUERY_TXT QUERY OTHER OTHER HIGH_BOUND QUERY MEASURE DATA_DEFAULT DATA_DEFAULT HIGH_VALUE HIGH_VALUE TRIGGER_BODY TEXT TEXT
Copyright © OnBarcode.com . All rights reserved.