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This implies that we may store our data very precisely, and when the need for raw speed arises, and the floating-point types significantly outperform the Oracle NUMBER type, we can use the CAST function to accomplish that goal.

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).

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 In version 7, they were enhanced to support up to 2GB of storage, but by the time version 8 was released, they were superceded by the LOB types, which we will discuss shortly.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:

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but a real implementation should always check the result of sqlite3_aggregate_context() and invoke sqlite3_result_error_nomem() if the result is NULL. In the str_agg_step() function, the text value to be aggregated is retrieved from the first argument using sqlite3_value_text(). This value is then added to the result member of the SAggCtx struct, which stores the intermediate concatenation. Note again that sqlite3_value_text() might return a NULL pointer if the argument to the SQL function is NULL or if the system is low on memory. A real implementation should check for this case in order to avoid a segfault.

Do not create tables with LONG columns. Use LOB columns (CLOB, NCLOB, BLOB) instead. LONG columns are supported only for backward compatibility.

You can change a pivot table option, to increase the number of characters in the indentation. 1. Right-click a cell in the pivot table, and then click PivotTable Options. 2. On the Layout & Format tab, in the Layout section, increase the number of characters in the setting When in Compact Form Indent Row Labels 1 Character(s). You can set the indent for up to 127 characters, but with that setting, it s not really a compact form! 3. Click OK, to close the dialog box.

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.

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.

Like Python mentioned earlier, a wealth of Java extensions are available for SQLite. These fall into two broad camps: the JDBC drivers (sometimes with added goodies) and complete reimplementations of SQLite in Java. We ll cover the javasqlite wrapper written by Christian Werner, who wrote the SQLite ODBC driver as well. It includes both a JDBC driver and a native JNI extension, which closely shadows the SQLite C API. You can download the extension from www.ch-werner.de/javasqlite/overviewsummary.html#jdbc_driver.

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.

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