« Oracle11g R1のAWRレポートでは%idleと%iowaitが逆なのな。 | トップページ | VIrtualBox 4.1.8 released :) »

2011年12月14日 (水)

PL/SQL de Conditional Compile #6

随分前にPL/SQL de Conditional Compile #5ってエントリ書いてたのを思い出して、11g R1/R2用のを見てみたらソースに丁寧なコメント(マニュアルよりいいんじゃね?w )が書かれていてうれしくなった。

オラクルさんとして見せたくない部分は見えないようになっているけど、見せても問題ないところはコードが見える(all_sourceビュー)わけで、それはそれでうれしいわけです。はい。マニュアルが意外に不親切だったりするので。

(マニュアル、良くなりましたよ。昔より。 > 褒めておかないとね、だれとなくw。)...文字サイズも多くしておきましたw

● Oracle11g R1 11.1 の DBMS_DB_VERSION

package dbms_db_version is
version constant pls_integer := 11; -- RDBMS version number
release constant pls_integer := 1; -- RDBMS release number

/* The following boolean constants follow a naming convention. Each
constant gives a name for a boolean expression. For example,
ver_le_9_1 represents version <= 9 and release <= 1
ver_le_10_2 represents version <= 10 and release <= 2
ver_le_10 represents version <= 10

A typical usage of these boolean constants is

$if dbms_db_version.ver_le_10 $then
version 10 and ealier code
$elsif dbms_db_version.ver_le_11 $then
version 11 code
$else
version 12 and later code
$end

This code structure will protect any reference to the code
for version 12. It also prevents the controlling package
constant dbms_db_version.ver_le_11 from being referenced
when the program is compiled under version 10. A similar
observation applies to version 11. This scheme works even
though the static constant ver_le_11 is not defined in
version 10 database because conditional compilation protects
the $elsif from evaluation if the dbms_db_version.ver_le_10 is
TRUE.
*/

ver_le_9_1 constant boolean := FALSE;
ver_le_9_2 constant boolean := FALSE;
ver_le_9 constant boolean := FALSE;
ver_le_10_1 constant boolean := FALSE;
ver_le_10_2 constant boolean := FALSE;
ver_le_10 constant boolean := FALSE;
ver_le_11_1 constant boolean := TRUE;
ver_le_11 constant boolean := TRUE;

end dbms_db_version;


● Oracle11g R2 11.2 の DBMS_DB_VERSION

package dbms_db_version is
version constant pls_integer := 11; -- RDBMS version number
release constant pls_integer := 2; -- RDBMS release number

/* The following boolean constants follow a naming convention. Each
constant gives a name for a boolean expression. For example,
ver_le_9_1 represents version <= 9 and release <= 1
ver_le_10_2 represents version <= 10 and release <= 2
ver_le_10 represents version <= 10

A typical usage of these boolean constants is

$if dbms_db_version.ver_le_10 $then
version 10 and ealier code
$elsif dbms_db_version.ver_le_11 $then
version 11 code
$else
version 12 and later code
$end

This code structure will protect any reference to the code
for version 12. It also prevents the controlling package
constant dbms_db_version.ver_le_11 from being referenced
when the program is compiled under version 10. A similar
observation applies to version 11. This scheme works even
though the static constant ver_le_11 is not defined in
version 10 database because conditional compilation protects
the $elsif from evaluation if the dbms_db_version.ver_le_10 is
TRUE.
*/

ver_le_9_1 constant boolean := FALSE;
ver_le_9_2 constant boolean := FALSE;
ver_le_9 constant boolean := FALSE;
ver_le_10_1 constant boolean := FALSE;
ver_le_10_2 constant boolean := FALSE;
ver_le_10 constant boolean := FALSE;
ver_le_11_1 constant boolean := FALSE;
ver_le_11_2 constant boolean := TRUE;
ver_le_11 constant boolean := TRUE;

end dbms_db_version;

version 12 and later codeなんて箇所、いいですね〜w


PL/SQL de Conditional Compile #1
PL/SQL de Conditional Compile #2
PL/SQL de Conditional Compile #3
PL/SQL de Conditional Compile #4
PL/SQL de Conditional Compile #5

|

トラックバック

この記事のトラックバックURL:
http://app.cocolog-nifty.com/t/trackback/106341/53482578

この記事へのトラックバック一覧です: PL/SQL de Conditional Compile #6:

コメント

コメントを書く