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| author | Bruce Momjian <bruce@momjian.us> | 2005-05-16 02:50:58 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2005-05-16 02:50:58 +0000 |
| commit | 390d460138b66a3dddd4fc6288366c3ddbe0c710 (patch) | |
| tree | 866d40b60ad3a52cd6925787082cd4c9a0a9de85 /doc/src | |
| parent | fd4d6853b71aa079bd1dcaf2f6c1af301f4ba96e (diff) | |
| download | postgresql-390d460138b66a3dddd4fc6288366c3ddbe0c710.tar.gz postgresql-390d460138b66a3dddd4fc6288366c3ddbe0c710.zip | |
Update Chinese FAQ to xhtml.
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/FAQ/FAQ_DEV.html | 55 | ||||
| -rw-r--r-- | doc/src/FAQ/FAQ_chinese.html | 1569 |
2 files changed, 782 insertions, 842 deletions
diff --git a/doc/src/FAQ/FAQ_DEV.html b/doc/src/FAQ/FAQ_DEV.html index cc0f8ad142e..9a863498829 100644 --- a/doc/src/FAQ/FAQ_DEV.html +++ b/doc/src/FAQ/FAQ_DEV.html @@ -13,7 +13,7 @@ <H1>Developer's Frequently Asked Questions (FAQ) for PostgreSQL</H1> - <P>Last updated: Fri May 6 13:47:54 EDT 2005</P> + <P>Last updated: Sat May 14 12:26:01 EDT 2005</P> <P>Current maintainer: Bruce Momjian (<A href= "mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR> @@ -34,8 +34,8 @@ <A href="#1.3">1.3</A>) What areas need work?<BR> <A href="#1.4">1.4</A>) What do I do after choosing an item to work on?<BR> - <A href="#1.5">1.5</A>) Where can I learn more about the code?<BR> - <A href="#1.6">1.6</A>) I've developed a patch, what next?<BR> + <A href="#1.5">1.5</A>) I've developed a patch, what next?<BR> + <A href="#1.6">1.6</A>) Where can I learn more about the code?<BR> <A href="#1.7">1.7</A>) How do I download/update the current source tree?<BR> <A href="#1.8">1.8</A>) How do I test my changes?<BR> @@ -139,9 +139,13 @@ <P>Send an email to pgsql-hackers with a proposal for what you want to do (assuming your contribution is not trivial). Working in - isolation is not advisable: others may be working on the same TODO - item; you may have misunderstood the TODO item; your approach may - benefit from the review of others.</P> + isolation is not advisable because others might be working on the same + TODO item, or you might have misunderstood the TODO item. In the + email, discuss both the internal implementation method you plan to + use, and any user-visible changes (new syntax, etc). For complex + patches, it is important to get community feeback on your proposal + before starting work. Failure to do so might mean your patch is + rejected.</P> <P>A web site is maintained for patches that are ready to be applied, <a href="http://momjian.postgresql.org/cgi-bin/pgpatches"> @@ -150,30 +154,33 @@ <a href="http://momjian.postgresql.org/cgi-bin/pgpatches2"> http://momjian.postgresql.org/cgi-bin/pgpatches2</a>.</P> - <H3><A name="1.5">1.5</A>) Where can I learn more about the - code?</H3> - - <P>Other than documentation in the source tree itself, you can find - some papers/presentations discussing the code at <A href= - "http://www.postgresql.org/developer"> - http://www.postgresql.org/developer</A>.</P> - - <H3><A name="1.6">1.6</A>) I've developed a patch, what next?</H3> + <H3><A name="1.5">1.5</A>) I've developed a patch, what next?</H3> <P>Generate the patch in contextual diff format. If you are - unfamiliar with this, you may find the script + unfamiliar with this, you might find the script <I>src/tools/makediff/difforig</I> useful.</P> <P>Ensure that your patch is generated against the most recent version of the code. If it is a patch adding new functionality, the - most recent version is cvs HEAD; if it is a bug fix, this will be + most recent version is CVS HEAD; if it is a bug fix, this will be the most recently version of the branch which suffers from the bug (for more on branches in PostgreSQL, see <A href= "#1.15">1.15</A>).</P> <P>Finally, submit the patch to pgsql-patches@postgresql.org. It - will be reviewed by other contributors to the project and may be - either accepted or sent back for further work.</P> + will be reviewed by other contributors to the project and will be + either accepted or sent back for further work. Also, please try to + include documentation changes as part of the patch. If you can't do + that, let us know and we will manually update the documentation when + the patch is applied.</P> + + <H3><A name="1.6">1.6</A>) Where can I learn more about the + code?</H3> + + <P>Other than documentation in the source tree itself, you can find + some papers/presentations discussing the code at <A href= + "http://www.postgresql.org/developer"> + http://www.postgresql.org/developer</A>.</P> <H3><A name="1.7">1.7</A>) How do I download/update the current source tree?</H3> @@ -183,7 +190,7 @@ <A href= "ftp://ftp.postgresql.org">ftp://ftp.postgresql.org</A>.</P> - <P>Regular developers may want to take advantage of anonymous + <P>Regular developers might want to take advantage of anonymous access to our source code management system. The source tree is currently hosted in CVS. For details of how to obtain the source from CVS see <A href= @@ -214,7 +221,7 @@ investigate.</P> <P>If you've deliberately changed existing behavior, this change - may cause a regression test failure but not any actual regression. + might cause a regression test failure but not any actual regression. If so, you should also patch the regression test suite.</P> <P><B>Other run time testing</B></P> @@ -769,7 +776,7 @@ delete tuples by passing the tuple's <I>t_self</I> to <I>heap_destroy().</I> You use <I>t_self</I> for <I>heap_update()</I> too. Remember, tuples can be either system - cache copies, which may go away after you call + cache copies, which might go away after you call <I>ReleaseSysCache()</I>, or read directly from disk buffers, which go away when you <I>heap_getnext()</I>, <I>heap_endscan</I>, or <I>ReleaseBuffer()</I>, in the <I>heap_fetch()</I> case. Or it may @@ -904,7 +911,7 @@ to create, copy, read, and output those structures (in particular, the files <I>copyfuncs.c</I> and <I>equalfuncs.c</I>. Make sure you add support for your new field to these files. Find any other - places the structure may need code for your new field. <I>mkid</I> + places the structure might need code for your new field. <I>mkid</I> is helpful with this (see <A href="#1.9">1.9</A>).</P> <H3><A name="2.5">2.5</A>) Why do we use <I>palloc</I>() and @@ -969,7 +976,7 @@ symbols, you can use a debugger to see what is happening. Because the backend was not started from <I>postmaster</I>, it is not running in an identical environment and locking/backend interaction - problems may not be duplicated.</P> + problems might not be duplicated.</P> <P>If the <I>postmaster</I> is running, start <I>psql</I> in one window, then find the <SMALL>PID</SMALL> of the <I>postgres</I> diff --git a/doc/src/FAQ/FAQ_chinese.html b/doc/src/FAQ/FAQ_chinese.html index 76fc5ed74fb..20b8b7ca17b 100644 --- a/doc/src/FAQ/FAQ_chinese.html +++ b/doc/src/FAQ/FAQ_chinese.html @@ -1,531 +1,441 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" + "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <!-- saved from url=(0063)file://I:\Wlzhang\MyDoc\postgresql\FAQcn.files\postgres-faq.htm --> -<!-- saved from url=(0046)http://laser.zhengmai.com.cn/postgres-faq.html --><HTML><HEAD><TITLE>PostgreSQL - FAQ-ch</TITLE> - <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=gb2312"> - <META content="Microsoft FrontPage 4.0" name="GENERATOR"> - </HEAD> - <BODY aLink="#0000ff" bgColor="#ffffff" link="#ff0000" text="#000000" vLink="#a00000"> - <H1>PostgreSQL ³£¼ûÎÊÌ⣨FAQ£©</H1> - ×î½ü¸üУº2003 Äê 01 Ô 06 ÈÕ ÐÇÆÚÒ» 22:27:35 CST - <P>Ŀǰά»¤ÈËÔ±£ºBruce Momjian (<A href="mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>) - <BR> - ÖÐÎÄ°æά»¤ÈËÔ±£ººÎΰƽ £¨laser@pgsqldb.com - £©<P>±¾ÎĵµµÄ×îа汾¿ÉÒÔÔÚ<a href="http://www.postgresql.org/files/documentation/faqs/FAQ.html">http://www.postgresql.org/files/documentation/faqs/FAQ.html</a> - ²é¿´¡£<P>²Ù×÷ϵͳƽ̨Ïà¹ØµÄÎÊÌâÔÚ<a href="http://www.postgresql.org/docs/faq/">http://www.postgresql.org/docs/faq/</a>Àï»Ø´ð¡£<br> - <HR> - <CENTER> - <H2>³£¼ûÎÊÌâ</H2> - </CENTER> - <a href="#1.1">1.1</a>) - PostgreSQL ÊÇʲô£¿¸ÃÔõô·¢Òô£¿ - <BR> - <a href="#1.2">1.2</a>) - PostgreSQL µÄ°æȨÊÇʲô? - <BR> - <A href="#1.3">1.3</A>) - PostgreSQL ÔËÐÐÔÚʲô Unix ƽ̨ÉÏ£¿ - <BR> - <A href="#1.4">1.4</A>) ¿ÉÓÃµÄ·Ç Unix - ƽ̨ÓÐÄÇЩ£¿ - <BR> - <A href="#1.5">1.5</A>) ÎÒ´ÓÄÄÀïÄܵõ½ - 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<p>PostgreSQL Ö§³Ö SERIAL Êý¾ÝÀàÐÍ¡£ËüÔÚ×Ö¶ÎÉÏ×Ô¶¯´´½¨Ò»¸öÐòÁкÍË÷Òý¡£ÀýÈ磬<br> - CREATE TABLE person ( <br> - id SERIAL, <br> - name TEXT <br> - );<br> - <br> - »á×Ô¶¯×ª»»Îª£º <br> - <br> - CREATE SEQUENCE person_id_seq;<br> - CREATE TABLE person ( <br> - id INT4 NOT NULL DEFAULT nextval('person_id_seq'),<br> - name TEXT <br> - );<br> - CREATE UNIQUE INDEX person_id_key ON person ( id );<br> - <br> - ²Î¿¼ create_sequence ÊÖ²áÒ³»ñÈ¡¹ØÓÚÐòÁеĸü¶àÐÅÏ¢¡£Ä㻹¿ÉÒÔÓÃÿÐÐµÄ oid ×Ö¶Î×÷Ϊһ¸öΨһֵ¡£²»¹ý£¬Èç¹ûÄãÐèÒªÇãµ¹ºÍÖØÔØÊý¾Ý¿â£¬ÄãÐèҪʹÓà pg_dump µÄ -o Ñ¡Ïî»òÕß COPY WITH OIDS Ñ¡ÏîÒÔ±£Áô OID¡£ </p> - <h4><a name="4.15.2"></a>4.15.2) - ÎÒÈçºÎ»ñµÃÒ»¸ö²åÈëµÄÐòÁкŵÄÖµ£¿</h4> - <p>Ò»ÖÖ·½·¨ÊÇÔÚ²åÈë֮ǰÏÈÓú¯Êý nextval() ´ÓÐòÁжÔÏóÀï¼ìË÷³öÏÂÒ»¸ö SERIAL Öµ£¬È»ºóÔÙÏÔʽ²åÈ롣ʹÓà - <a href="#4.15.1"> 4.15.1</a> ÀïµÄÀý±í£¬¿ÉÓÃαÂëÕâÑùÃèÊö£º <br> - <br> - new_id = execute("SELECT nextval('person_id_seq')");<br> - execute("INSERT INTO person (id, name) VALUES (new_id, 'Blaise Pascal')");<br> - <br> - ÕâÑù»¹ÄÜÔÚÆäËû²éѯÖÐʹÓôæ·ÅÔÚ new_id ÀïµÄÐÂÖµ£¨ÀýÈ磬×÷Ϊ person ±íµÄÍâ¼ü£©¡£×¢Òâ×Ô¶¯´´½¨µÄ SEQUENCE ¶ÔÏóµÄÃû³Æ½«»áÊÇ <table>_<serialcolumn>_seq£¬ÕâÀï table ºÍ serialcolumn ·Ö±ðÊÇÄãµÄ±íµÄÃû³ÆºÍÄãµÄ SERIAL ×ֶεÄÃû³Æ¡£ <br> - <br> - ÀàËƵģ¬ÔÚ SERIAL ¶ÔÏóȱʡ²åÈëºóÄã¿ÉÒÔÓú¯Êý currval() ¼ìË÷¸Õ¸³ÖµµÄ SERIAL Öµ£¬ÀýÈ磬 <br> - <br> - execute("INSERT INTO person (name) VALUES ('Blaise Pascal')");<br> - new_id = execute("SELECT currval('person_id_seq')");<br> - <br> - ×îºó£¬Äã¿ÉÒÔʹÓÃ´Ó INSERT Óï¾ä·µ»ØµÄ <a href="4.16">OID</a> - ²éÕÒȱʡֵ£¬¾¡¹ÜÕâ¿ÉÄÜÊÇ×îȱ·¦ÒÆÖ²ÐԵķ½·¨¡£ÔÚ Perl ÀʹÓôøÓÐ Edmund Mergl µÄ DBD::Pg Ä£¿éµÄ DBI£¬oid Öµ¿ÉÒÔͨ¹ý $sth->execute() ºóµÄ $sth->{pg_oid_status} »ñµÃ¡£ </p> - <h4><a name="4.15.3"></a>4.15.3) ʹÓà currval() ºÍ nextval() »áµ¼ÖÂÒ»¸öÓëÆäËûÓû§Ö®¼äµÄÎÉÂÒÇé¿öÂð£¿</h4> - <p>²»»á¡£currval() ·µ»Øºǫ́½ø³Ì¶ø²»ÊÇËùÓÐÓû§¸³ÓèµÄµ±Ç°Öµ¡£<br> - </p> - <h4><a name="4.15.4"></a>4.15.4) - Ϊʲô²»ÔÚÊÂÎñÒì³£ÖÐÖ¹ºóÖØÓÃÐòÁкÅÄØ£¿ÎªÊ²Ã´ÔÚÐòÁкÅ×ֶεÄÈ¡ÖµÖдæÔÚ¼ä¶ÏÄØ£¿</h4> - <p>ΪÁËÌá¸ß²¢·¢ÐÔ£¬ÐòÁкÅÔÚÐèÒªµÄʱºò¸³ÓèÕýÔÚÔËÐеÄÊÂÎñ£¬²¢ÇÒÖ»ÔÚÊÂÎñ½áÊø֮ǰ²»·âËø¡£Õâ¾Í»áµ¼ÖÂزÕÛÊÂÎñºóµÄÐòÁкųöÏÖ¼ä¸ô¡£</p> - <h4><br> - <a name="4.16"></a>4.16) ʲôÊÇ OID£¿Ê²Ã´ÊÇ TID£¿</h4> - <p>OID ÊÇ PostgreSQL ÖÐÐеÄΨһ±êʶ¡£PostgreSQL Àï´´½¨µÄÿһÐж¼»ñµÃÒ»¸öΨһµÄ OID¡£ËùÓÐÔÚ initdb ¹ý³ÌÖд´½¨µÄ OID ¶¼Ð¡ÓÚ 16384 £¨²Î¼û include/access/transam.h£©¡£ËùÓÐÓû§´´½¨µÄ OID ¶¼´óÓÚ»òµÈÓÚÕâ¸öÖµ¡£È±Ê¡Ê±£¬ËùÓÐÕâЩ OID ²»½öÔÚÒ»¸ö±í»òÒ»¸öÊý¾Ý¿âÀïÃæΨһ£¬¶øÇÒÔÚÕû¸ö PostgreSQL °²×°ÀïÒ²ÊÇΨһµÄ¡£ <br> - <br> - PostgreSQL ÔÚËüµÄÄÚ²¿ÏµÍ³±íÀïʹÓà OID ÔÚ±íÖ®¼ä½¨Á¢ÁªÏµ¡£ÕâЩ OID ¿ÉÒÔÓÃÓÚ±êʶÌض¨µÄÓû§ÐÐÒÔ¼°ÓÃÔÚÁ¬½ÓÀï¡£½¨ÒéʹÓÃ×Ö¶ÎÀàÐÍ OID ´æ´¢ OID Öµ¡£¿ÉÒÔÔÚ OID ×Ö¶ÎÉÏ´´½¨Ò»¸öË÷ÒýÒÔ¿ìËÙ·ÃÎÊ¡£ <br> - <br> - OID ´ÓÒ»¸ö±»ËùÓÐÊý¾Ý¿âʹÓõÄÖÐÐÄÇøÓòÀ︳ֵ¸øËùÓÐÐÂÐС£Èç¹ûÄãÏë°Ñ OID ¸Ä³É±ðµÄÖµ£¬»òÕßÏë×öÒ»·Ý±íµÄ´øÔʼ OID µÄ¿½±´£¬Äã¿ÉÒÔ×öµ½£º <br> - <br> - CREATE TABLE new(old_oid oid, mycol int);<br> - SELECT old_oid, mycol INTO new FROM old;<br> - COPY new TO '/tmp/pgtable';<br> - DELETE FROM new;<br> - COPY new WITH OIDS FROM '/tmp/pgtable';<br> - <br> - OID ÓÃ4×Ö½ÚµÄÕûÊý±£´æ£¬ÔÚ³¬¹ý40ÒÚʱ½«Òç³ö¡£Ã»ÓÐÈ˱¨¸æ³öÏÖ¹ýÒç³ö£¬¶øÎÒÃÇ´òËãÔÚÓÐÈ˱¨¸æ֮ǰÏû³ýÕâ¸öÏÞÖÆ¡£<br> - <br> - TID ÓÃÓÚ±êʶ´ø×ÅÊý¾Ý¿é£¨µØÖ·£©ºÍ£¨¿éÄÚ£©Æ«ÒƵÄÌض¨µÄÎïÀíÐС£TID ÔÚÐб»¸ü¸Ä»òÖØÔغó·¢Éú¸Ä±ä¡£Ë÷ÒýÈë¿ÚʹÓÃËüÃÇÖ¸ÏòÎïÀíÐС£</p> - <h4><a name="4.17"></a>4.17) PostgreSQL ʹÓõÄһЩÊõÓïµÄº¬ÒåÊÇʲô£¿</h4> - <p>һЩԴ´úÂëºÍһЩ¾ÉÒ»µãµÄÎĵµÊ¹ÓÃһЩÓиü³£ÓÃÓ÷¨µÄÊõÓï¡£ÏÂÃæÊÇÆäÖÐÒ»²¿·Ö£º <br> - table, relation, class <br> - row, record, tuple <br> - column, field, attribute <br> - 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"R-Trees: A Dynamic Index Structure for Spatial Searching." Proc of the 1984 ACM SIGMOD Int'l Conf on Mgmt of Data, 45-57.<br /> + <br /> + Ä㻹¿ÉÒÔÔÚ Stonebraker µÄ¡°Readings in Database Systems¡±ÀïÕÒµ½ÕâƪÎÄÕ¡£<br /> + <br /> + ϵͳÄÚÖÃµÄ R-Tree ¿ÉÒÔ´¦Àí¶à±ßÐκͷ½ÐΡ£ÀíÂÛÉÏ˵£¬R-tree ¿ÉÒÔÀ©Õ¹Îª´¦Àí¸ü¶àάÊý¡£²»¹ýÔÚʵ¼ùÉÏ£¬À©Õ¹ R-trees ÐèÒªÒ»¶¨µÄ¹¤×÷Á¿£¬¶øÎÒÃÇĿǰûÓÐÈçºÎ×öµÄÎĵµ¡£</p> + + <h4><a id="4.11" name="4.11"></a>4.11) ʲôÊÇ»ùÒò²éѯÓÅ»¯£¨Genetic Query Optimization£©£¿</h4> + + <p>GEQO Ä£¿é²ÉÓûùÒòËã·¨£¨Genetic Algorithm£¬GA£©¼Ó¿ì¶à±íÁ¬½ÓµÄ²éѯÓÅ»¯¡£ËüÔÊÐíͨ¹ý·ÇÇî¾ÙËÑË÷´¦Àí´óµÄÁ¬½Ó²éѯ¡£</p> + + <h4><a id="4.12" name="4.12"></a>4.12) ÎÒÔõÑù×öÕýÔò±í´ïʽËÑË÷ºÍ´óСдÎ޹صÄÕýÔò±í´ïʽËÑË÷£¿ÔõÑùÀûÓÃË÷Òý½øÐдóСдÎÞ¹ØËÑË÷£¿</h4> + + <p>²Ù×÷·û ~ ´¦ÀíÕýÔò±í´ïʽƥÅ䣬¶ø ~* ´¦Àí´óСдÎ޹صÄÕýÔò±í´ïʽƥÅä¡£´óдЩÎÞ¹ØµÄ LIKE ±äÖÖ³ÉΪ ILIKE¡£<br /> + <br /> + ´óСдÎ޹صĵÈʽ±È½Ïͨ³£Ð´×ö£º<br /> + <br /> + SELECT *<br /> + FROM tab<br /> + WHERE lower(col) = 'abc';<br /> + <br /> + ÕâÑù½«²»»áʹÓñê×¼µÄË÷Òý¡£µ«ÊÇ¿ÉÒÔ´´½¨Ò»¸ö¿É±»ÀûÓõĺ¯ÊýË÷Òý:<br /> + <br /> + CREATE INDEX tabindex ON tab (lower(col));</p> + + <h4><a id="4.13" name="4.13"></a>4.13) ÔÚÒ»¸ö²éѯÀÎÒÔõÑù¼ì²âÒ»¸ö×Ö¶ÎÊÇ·ñΪ NULL£¿</h4> + + <p>Óà IS NULL ºÍ IS NOT NULL ²âÊÔÕâ¸ö×ֶΡ£ <br /> + </p> + + <h4><a id="4.14" name="4.14"></a>4.14) ¸÷ÖÖ×Ö·ûÀàÐÍÖ®¼äÓÐʲô²»Í¬£¿</h4> + + <p> ÀàÐÍ ÄÚ²¿Ãû³Æ ˵Ã÷<br /> + --------------------------------------------------<br /> + "char" char 1¸ö×Ö·û character<br /> + CHAR(#) bpchar ¶¨³¤×Ö·û´®£¬Êµ¼ÊÊý¾Ý²»×㶨Ò峤¶Èʱ£¬ÒÔ¿Õ¸ñ²¹Æë<br /> + VARCHAR(#) varchar Ö¸¶¨ÁË×î´ó³¤¶È£¬±ä³¤×Ö·û´®£¬²»×㶨Ò峤¶ÈµÄ²¿·Ö²»²¹Æë<br /> + TEXT text ´®³¤¶È½öÊÜÐеÄ×î´ó³¤¶ÈÏÞÖÆ<br /> + BYTEA bytea ±ä³¤×Ö½ÚÐòÁУ¨±ä³¤µÄ¶þ½øÖÆÊý¾Ý£©<br /> + <br /> + ÔÚϵͳ±íºÍÔÚһЩ´íÎóÐÅÏ¢ÀïÄ㽫¿´µ½ÄÚ²¿Ãû³Æ¡£ <br /> + <br /> + ÉÏÃæ×îºóËÄÖÖÀàÐÍÊÇ"varlena"£¨±ä³¤£©ÀàÐÍ£¨Ò²¾ÍÊÇ˵£¬¿ªÍ·µÄËĸö×Ö½ÚÊdz¤¶È£¬ºóÃæ²ÅÊÇÊý¾Ý£©¡£ÓÚÊÇʵ¼ÊÕ¼ÓõĿռä±ÈÉùÃ÷µÄ´óСҪ¶àһЩ¡£È»¶øÕâЩÀàÐͶ¼¿ÉÒÔ±»Ñ¹Ëõ´æ´¢£¬Ò²¿ÉÒÔÓà TOAST ÍÑ»ú´æ´¢£¬Òò´Ë´ÅÅÌ¿Õ¼äÒ²¿ÉÄܱÈÔ¤ÏëµÄÒªÉÙ¡£<br /> + <br /> + CHAR(n) ×îÊʺÏÓÚ´æ´¢³¤¶È»ù±¾²î²»¶àµÄ×Ö·û´®¡£VARCHAR(n) ÔÚ´æ´¢ÏÞÖÆÁË×î´ó³¤¶ÈµÄ±ä³¤×Ö·û´®ÊÇ×îºÃµÄ¡£TEXT 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SERIAL Öµ£¬È»ºóÔÙÏÔʽ²åÈ롣ʹÓà <a href="#4.15.1">4.15.1</a> ÀïµÄÀý±í£¬¿ÉÓÃαÂëÕâÑùÃèÊö£º <br /> + <br /> + new_id = execute("SELECT nextval('person_id_seq')");<br /> + execute("INSERT INTO person (id, name) VALUES (new_id, 'Blaise Pascal')");<br /> + <br /> + ÕâÑù»¹ÄÜÔÚÆäËû²éѯÖÐʹÓôæ·ÅÔÚ new_id ÀïµÄÐÂÖµ£¨ÀýÈ磬×÷Ϊ person ±íµÄÍâ¼ü£©¡£×¢Òâ×Ô¶¯´´½¨µÄ SEQUENCE ¶ÔÏóµÄÃû³Æ½«»áÊÇ <table>_<serialcolumn>_seq£¬ÕâÀï table ºÍ serialcolumn ·Ö±ðÊÇÄãµÄ±íµÄÃû³ÆºÍÄãµÄ SERIAL ×ֶεÄÃû³Æ¡£ <br /> + <br /> + ÀàËƵģ¬ÔÚ SERIAL ¶ÔÏóȱʡ²åÈëºóÄã¿ÉÒÔÓú¯Êý currval() ¼ìË÷¸Õ¸³ÖµµÄ SERIAL Öµ£¬ÀýÈ磬 <br /> + <br /> + execute("INSERT INTO person (name) VALUES ('Blaise Pascal')");<br /> + new_id = execute("SELECT currval('person_id_seq')");<br /> + <br /> + ×îºó£¬Äã¿ÉÒÔʹÓÃ´Ó INSERT Óï¾ä·µ»ØµÄ <a href="4.16">OID</a> ²éÕÒȱʡֵ£¬¾¡¹ÜÕâ¿ÉÄÜÊÇ×îȱ·¦ÒÆÖ²ÐԵķ½·¨¡£ÔÚ Perl ÀʹÓôøÓÐ Edmund Mergl µÄ DBD::Pg Ä£¿éµÄ DBI£¬oid Öµ¿ÉÒÔͨ¹ý $sth->execute() ºóµÄ $sth->{pg_oid_status} »ñµÃ¡£ </p> + + <h4><a id="4.15.3" name="4.15.3"></a>4.15.3) ʹÓà 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