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»á×Ô¶¯×ª»»Îª£º CREATE SEQUENCE - person_id_seq; CREATE TABLE person ( id INT4 NOT NULL DEFAULT - nextval('person_id_seq'), name TEXT ); CREATE UNIQUE INDEX - person_id_key ON person ( id ); 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¡£ 4.15.2) - ÎÒÈçºÎ»ñµÃÒ»¸ö²åÈëµÄÐòÁкŵÄÖµ£¿ Ò»ÖÖ·½·¨ÊÇÔÚ²åÈë֮ǰÏÈÓú¯Êý - nextval() ´ÓÐòÁжÔÏóÀï¼ìË÷³öÏÂÒ»¸ö SERIAL Öµ£¬È»ºóÔÙÏÔʽ²åÈ롣ʹÓà - 4.15.1 <#4.15.1> ÀïµÄÀý±í£¬¿ÉÓÃαÂëÕâÑùÃèÊö£º new_id = execute("SELECT - nextval('person_id_seq')"); execute("INSERT INTO person (id, name) - VALUES (new_id, 'Blaise Pascal')"); ÕâÑù»¹ÄÜÔÚÆäËû²éѯÖÐʹÓôæ·ÅÔÚ - new_id ÀïµÄÐÂÖµ£¨ÀýÈ磬×÷Ϊ person ±íµÄÍâ ¼ü£©¡£×¢Òâ×Ô¶¯´´½¨µÄ - SEQUENCE ¶ÔÏóµÄÃû³Æ½«»áÊÇ - - __seq£¬ÕâÀï table ºÍ serialcolumn ·Ö±ðÊÇÄãµÄ±íµÄÃû ³ÆºÍÄãµÄ SERIAL - ×ֶεÄÃû³Æ¡£ ÀàËÆµÄ£¬ÔÚ SERIAL ¶ÔÏóȱʡ²åÈëºóÄã¿ÉÒÔÓú¯Êý currval() - ¼ìË÷¸Õ¸³ÖµµÄ SERIAL Öµ£¬ÀýÈ磬 execute("INSERT INTO person (name) - VALUES ('Blaise Pascal')"); new_id = execute("SELECT - currval('person_id_seq')"); ×îºó£¬Äã¿ÉÒÔʹÓÃ´Ó INSERT Óï¾ä·µ»ØµÄ OID - <4.16> 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¡£ 4.15.3) ʹÓà - currval() ºÍ nextval() »áµ¼ÖÂÒ»¸öÓëÆäËûÓû§Ö®¼äµÄÎÉ ÂÒÇé¿öÂ𣿠- ²»»á¡£currval() ·µ»Øºǫ́½ø³Ì¶ø²»ÊÇËùÓÐÓû§¸³ÓèµÄµ±Ç°Öµ¡£ 4.15.4) - Ϊʲô²»ÔÚÊÂÎñÒì³£ÖÐÖ¹ºóÖØÓÃÐòÁкÅÄØ£¿ÎªÊ²Ã´ÔÚÐòÁкÅ×Ö¶Î - µÄȡֵÖдæÔÚ¼ä¶ÏÄØ£¿ + ÉÏÃæ×îºóËÄÖÖÀàÐÍÊÇ"varlena"£¨±ä³¤£©ÀàÐÍ£¨Ò²¾ÍÊÇ˵£¬¿ªÍ·µÄËĸö×Ö½ÚÊdz¤¶ + È£¬ºóÃæ²ÅÊÇÊý¾Ý£©¡£ÓÚÊÇʵ¼ÊÕ¼ÓõĿռä±ÈÉùÃ÷µÄ´óСҪ¶àһЩ¡£È»¶øÕâЩÀàÐ + Ͷ¼¿ÉÒÔ±»Ñ¹Ëõ´æ´¢£¬Ò²¿ÉÒÔÓà TOAST + ÍÑ»ú´æ´¢£¬Òò´Ë´ÅÅ̿ռäÒ²¿ÉÄܱÈÔ¤ÏëµÄÒªÉÙ¡£ + 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 + ÊÊÓÃÓÚ´æ´¢²»ÏÞÖÆ³¤¶ÈµÄ×Ö·û´®£¬×î´ó¿É´ï 1G¡£BYTEA + ÓÃÓÚ´æ´¢¶þ½øÖÆÊý¾Ý£¬ÓÈÆäÊǰüº¬ NULL + ×Ö½Ú£¨¶þ½øÖƵÄ0£©µÄÖµ¡£ÕâЩÀàÐ;ßÓÐÀàÐ͵ÄÐÔÄÜ¡£ + + 4.15.1) ÎÒÔõÑù´´½¨Ò»¸öÐòÁкÅ/×Ô¶¯µÝÔöµÄ×ֶΣ¿ + + PostgreSQL Ö§³Ö SERIAL + Êý¾ÝÀàÐÍ¡£ËüÔÚ×Ö¶ÎÉÏ×Ô¶¯´´½¨Ò»¸öÐòÁкÍË÷Òý¡£ÀýÈ磬 + CREATE TABLE person ( + id SERIAL, + name TEXT + ); + »á×Ô¶¯×ª»»Îª£º + + CREATE SEQUENCE person_id_seq; + CREATE TABLE person ( + id INT4 NOT NULL DEFAULT nextval('person_id_seq'), + name TEXT + ); + CREATE UNIQUE INDEX person_id_key ON person ( id ); + 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¡£ + + 4.15.2) ÎÒÈçºÎ»ñµÃÒ»¸ö²åÈëµÄÐòÁкŵÄÖµ£¿ + + Ò»ÖÖ·½·¨ÊÇÔÚ²åÈë֮ǰÏÈÓú¯Êý nextval() ´ÓÐòÁжÔÏóÀï¼ìË÷³öÏÂÒ»¸ö SERIAL + Öµ£¬È»ºóÔÙÏÔʽ²åÈ롣ʹÓà 4.15.1 ÀïµÄÀý±í£¬¿ÉÓÃαÂëÕâÑùÃèÊö£º + new_id = execute("SELECT nextval('person_id_seq')"); + execute("INSERT INTO person (id, name) VALUES (new_id, 'Blaise + Pascal')"); + 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¡£ + ÀàËÆµÄ£¬ÔÚ SERIAL ¶ÔÏóȱʡ²åÈëºóÄã¿ÉÒÔÓú¯Êý currval() ¼ìË÷¸Õ¸³ÖµµÄ + SERIAL Öµ£¬ÀýÈ磬 + execute("INSERT INTO person (name) VALUES ('Blaise Pascal')"); + new_id = execute("SELECT currval('person_id_seq')"); + ×îºó£¬Äã¿ÉÒÔʹÓÃ´Ó INSERT Óï¾ä·µ»ØµÄ OID + 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¡£ + + 4.15.3) ʹÓà currval() ºÍ nextval() »áµ¼ÖÂÒ»¸öÓëÆäËûÓû§Ö®¼äµÄÎÉÂÒÇé¿öÂ𣿠+ + ²»»á¡£currval() ·µ»Øºǫ́½ø³Ì¶ø²»ÊÇËùÓÐÓû§¸³ÓèµÄµ±Ç°Öµ¡£ + + 4.15.4) + Ϊʲô²»ÔÚÊÂÎñÒì³£ÖÐÖ¹ºóÖØÓÃÐòÁкÅÄØ£¿ÎªÊ²Ã´ÔÚÐòÁкÅ×ֶεÄȡֵÖдæÔÚ¼ä¶ÏÄØ£ + ¿ + ΪÁËÌá¸ß²¢·¢ÐÔ£¬ÐòÁкÅÔÚÐèÒªµÄʱºò¸³ÓèÕýÔÚÔËÐеÄÊÂÎñ£¬²¢ÇÒÖ»ÔÚÊÂÎñ½áÊø - Ö® ǰ²»·âËø¡£Õâ¾Í»áµ¼ÖÂØ²ÕÛÊÂÎñºóµÄÐòÁкųöÏÖ¼ä¸ô¡£ 4.16) ʲôÊÇ - OID£¿Ê²Ã´ÊÇ TID£¿ OID ÊÇ PostgreSQL ÖÐÐеÄΨһ±êʶ¡£PostgreSQL - Àï´´½¨µÄÿһÐж¼»ñµÃÒ»¸öΨ Ò»µÄ OID¡£ËùÓÐÔÚ initdb ¹ý³ÌÖд´½¨µÄ OID + ֮ǰ²»·âËø¡£Õâ¾Í»áµ¼ÖÂØ²ÕÛÊÂÎñºóµÄÐòÁкųöÏÖ¼ä¸ô¡£ + + 4.16) ʲôÊÇ OID£¿Ê²Ã´ÊÇ TID£¿ + + 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¡ ʱ£¬ËùÓÐÕâЩ OID + ¶¼´óÓÚ»òµÈÓÚÕâ¸öÖµ¡£È±Ê¡Ê±£¬ËùÓÐÕâЩ OID ²»½öÔÚÒ»¸ö±í»òÒ»¸öÊý¾Ý¿âÀïÃæÎ¨Ò»£¬¶øÇÒÔÚÕû¸ö PostgreSQL - °²×°ÀïÒ²ÊÇΨһµÄ¡£ PostgreSQL ÔÚËüµÄÄÚ²¿ÏµÍ³±íÀïʹÓà OID - ÔÚ±íÖ®¼ä½¨Á¢ÁªÏµ¡£ÕâЩ OID ¿ÉÒÔÓà - ÓÚ±êÊ¶ÌØ¶¨µÄÓû§ÐÐÒÔ¼°ÓÃÔÚÁ¬½ÓÀï¡£½¨ÒéʹÓÃ×Ö¶ÎÀàÐÍ OID ´æ´¢ OID - Öµ¡£¿ÉÒÔ ÔÚ OID ×Ö¶ÎÉÏ´´½¨Ò»¸öË÷ÒýÒÔ¿ìËÙ·ÃÎÊ¡£ OID - ´ÓÒ»¸ö±»ËùÓÐÊý¾Ý¿âʹÓõÄÖÐÐÄÇøÓòÀ︳ֵ¸øËùÓÐÐÂÐС£Èç¹ûÄãÏë°Ñ OID ¸Ä - ³É±ðµÄÖµ£¬»òÕßÏë×öÒ»·Ý±íµÄ´øÔʼ OID µÄ¿½±´£¬Äã¿ÉÒÔ×öµ½£º CREATE TABLE - new(old_oid oid, mycol int); 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+ £¨IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
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+ UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT
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+ PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND
+ THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE,
+ SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.£©<br>
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+ <p>·þÎñÆ÷</p>
+ <P>Êý¾Ý¿â·þÎñÆ÷ÏÖÔÚ¿ÉÒÔͨ¹ý Cygwin £¬Cygnus µÄ Unix/NT ÒÆÖ²¿âÔÚ Windows NT ºÍ Win2k ÉÏÔËÐС£²ÎÔÄ·¢²¼°æ±¾ÀïµÄ See <i>pgsql/doc/FAQ_MSWIN</i>
+ Îļþ»ò <a href="http://www.PostgreSQL.org/docs/faq-mswin.html">http://www.PostgreSQL.org/docs/faq-mswin.html</a>
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+ ÔÚ EFNet ÀﻹÓÐÒ»¸ö IRC ƵµÀ£¬ÆµµÀ #PostgreSQL¡£ÎÒÓà unix ÃüÁî<TT>irc -c '#PostgreSQL' "$USER"
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+ http://www.commandprompt.com/ppbook/</a> ¡£ÔÚ <a href="http://www.ca.PostgreSQL.org/books/">
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+ ÆäËûµÄÓÐ<I> The Complete Reference SQL, Groff et al., McGraw-Hill ¡£</I>
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+ Çë·ÃÎÊ <a href="http://www.PostgreSQL.org/bugs/bugs.php">http://www.PostgreSQL.org/bugs/bugs.php</a>
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+ »ñµÃ¡£Ê¹ÓÃͳ¼ÆÖµ£¬ÓÅ»¯Æ÷ÖªµÀ±íÖÐÓжàÉÙÐУ¬¾ÍÄܹ»¸üºÃµØÅжÏÊÇ·ñÀûÓÃË÷Òý¡£Í³¼ÆÖµ¶ÔÈ·¶¨ÓÅ»¯µÄÁ¬½Ó˳ÐòºÍÁ¬½Ó·½·¨Ò²ºÜÓÐÓá£ÔÚ±íµÄÄÚÈÝ·¢Éú±ä»¯Ê±£¬Ó¦¶¨ÆÚ½øÐÐͳ¼ÆÖµµÄ»ñÈ¡¡£
+ <P>
+ Ë÷Òýͨ³£²»ÓÃÓÚ ORDER BY »òÖ´ÐÐÁ¬½Ó¡£¶ÔÒ»¸ö´ó±íµÄÒ»´Î˳ÐòɨÃ裬ÔÙ×öÒ»¸öÏÔʽµÄÅÅÐòͨ³£±ÈË÷ÒýɨÃèÒª¿ì¡£
+ <P>µ«ÊÇ£¬ÔÚ LIMIT ºÍ ORDER BY ½áºÏʹÓÃʱ¾³£»áʹÓÃË÷Òý£¬ÒòΪֻ»á·µ»Ø±íµÄһС²¿·Ö¡£Êµ¼ÊÉÏ£¬ËäÈ» MAX() ºÍ MIN() ²¢²»Ê¹ÓÃË÷Òý£¬Í¨¹ý¶Ô
+ ORDER BY ºÍ LLIMIT ʹÓÃË÷ÒýÈ¡µÃ×î´óÖµºÍ×îСֵҲÊÇ¿ÉÒԵģº<BR>
+ <BR>
+ SELECT col<BR>
+ FROM tab<BR>
+ ORDER BY col [ DESC ]<BR>
+ LIMIT 1;
+ <P>µ±Ê¹ÓÃͨÅä·û²Ù×÷£¬ÀýÈç LIKE »ò ~ ʱ£¬Ë÷ÒýÖ»ÄÜÔÚÌØ¶¨µÄÇé¿öÏÂʹÓ㺠<ul><li> ×Ö·û´®µÄ¿ªÊ¼²¿·Ö±ØÐëÊÇÆÕͨ×Ö·û´®£¬Ò²¾ÍÊÇ˵£º</li>
+ <ul><li>LIKE ģʽ²»ÄÜÒÔ % ´òÍ·¡£</li><li>~ £¨ÕýÔò±í´ïʽ£©Ä£Ê½±ØÐëÒÔ ^ ´òÍ·¡£</li></ul>
+ <li>×Ö·û´®²»ÄÜÒÔÆ¥Åä¶à¸ö×Ö·ûµÄģʽÀà´òÍ·£¬ÀýÈç [a-e]¡£</li><li>´óСдÎ޹صIJéÕÒ£¬Èç ILIKE ºÍ ~* µÈ²»Ê¹ÓÃË÷Òý¡£µ«¿ÉÒÔÓà 4.12 ½ÚÃèÊöµÄº¯ÊýË÷Òý¡£</li><li>ÔÚ×ö initdb ʱ±ØÐë²ÉÓÃȱʡµÄ±¾µØÉèÖà C locale¡£</li></ul>
+ <H4><a name="4.9"></a>4.9)
+ ÎÒÈçºÎ²ÅÄÜ¿´µ½²éѯÓÅ»¯Æ÷ÊÇÔõÑù´¦ÀíÎҵIJéѯµÄ£¿</H4>
+ ²Î¿¼ <FONT size="-1">EXPLAIN</FONT> ÊÖ²áÒ³¡£
+ <H4><a name="4.10"></a>4.10) R-tree Ë÷ÒýÊÇʲô£¿</H4>
+ <P>R-tree Ë÷ÒýÓÃÓÚË÷Òý¿Õ¼äÊý¾Ý¡£Ò»¸ö¹þÏ£Ë÷ÒýÎÞ·¨´¦Àí·¶Î§ËÑË÷¡£¶ø B-tree Ë÷ÒýÖ»ÄÜ´¦ÀíһάµÄ·¶Î§ËÑË÷¡£R-tree
+ Ë÷Òý¿ÉÒÔ´¦Àí¶àάÊý¾Ý¡£ÀýÈ磬Èç¹û¿ÉÒÔÔÚÒ»¸öÀàÐÍΪ point µÄ×Ö¶ÎÉϽ¨Á¢Ò»¸ö R-tree Ë÷Òý£¬ÄÇôϵͳÄܸü¸ßЧµØ»Ø´ðÀàËÆ
+ ¡°Ñ¡ÔñÔÚÒ»¸ö³¤·½Ðη¶Î§ÄÚµÄËùÓе㡱¡£<BR>
+ <BR>
+ ÃèÊö×î³õµÄ R-Tree Éè¼ÆµÄÕýʽÂÛÎÄÊÇ£º<BR>
+ <BR>
+ Guttman, A. "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¡±ÀïÕÒµ½ÕâÆªÎÄÕ¡£<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¡£<H4><a 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¡£
+ <H4><a 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 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 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´ÅÅ̿ռäÒ²¿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 ÊÊÓÃÓÚ´æ´¢²»ÏÞÖÆ³¤¶ÈµÄ×Ö·û´®£¬×î´ó¿É´ï 1G¡£BYTEA ÓÃÓÚ´æ´¢¶þ½øÖÆÊý¾Ý£¬ÓÈÆäÊǰüº¬ NULL ×Ö½Ú£¨¶þ½øÖƵÄ0£©µÄÖµ¡£ÕâЩÀàÐ;ßÓÐÀàÐ͵ÄÐÔÄÜ¡£</p>
+ <h4><a name="4.15.1"></a>4.15.1) ÎÒÔõÑù´´½¨Ò»¸öÐòÁкÅ/×Ô¶¯µÝÔöµÄ×ֶΣ¿</h4>
+ <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»ºóÔÙÏÔʽ²åÈ롣ʹÓÃ
+ <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>
+ ÀàËÆµÄ£¬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×ֶεÄȡֵÖдæÔÚ¼ä¶ÏÄØ£¿</h4>
+ <p>ΪÁËÌá¸ß²¢·¢ÐÔ£¬ÐòÁкÅÔÚÐèÒªµÄʱºò¸³ÓèÕýÔÚÔËÐеÄÊÂÎñ£¬²¢ÇÒÖ»ÔÚÊÂÎñ½áÊøÖ®Ç°²»·âËø¡£Õâ¾Í»áµ¼ÖÂØ²ÕÛÊÂÎñºóµÄÐòÁкųöÏÖ¼ä¸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¿âÀïÃæÎ¨Ò»£¬¶øÇÒÔÚÕû¸ö PostgreSQL °²×°ÀïÒ²ÊÇΨһµÄ¡£ <br>
+ <br>
+ PostgreSQL ÔÚËüµÄÄÚ²¿ÏµÍ³±íÀïʹÓà OID ÔÚ±íÖ®¼ä½¨Á¢ÁªÏµ¡£ÕâЩ OID ¿ÉÒÔÓÃÓÚ±êÊ¶ÌØ¶¨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˱¨¸æÖ®Ç°Ïû³ýÕâ¸öÏÞÖÆ¡£<br>
+ <br>
+ TID ÓÃÓÚ±êʶ´ø×ÅÊý¾Ý¿é£¨µØÖ·£©ºÍ£¨¿éÄÚ£©Æ«ÒƵÄÌØ¶¨µÄÎïÀíÐС£TID ÔÚÐб»¸ü¸Ä»òÖØÔØºó·¢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>
+ retrieve, select <br>
+ replace, update <br>
+ append, insert <br>
+ OID, serial value <br>
+ portal, cursor <br>
+ range variable, table name, table alias <br>
+ <br>
+ ÓÐÒ»¸öͨÓÃÊý¾Ý¿âÊõÓïµÄÁÐ±í£º<a href="http://hea-www.harvard.edu/MST/simul/software/docs/pkgs/pgsql/glossary/glossary.html">http://hea-www.harvard.edu/MST/simul/software/docs/pkgs/pgsql/glossary/glossary.html</a>
+ ¡£ </p>
+ <h4><a name="4.18"></a>4.18)
+ ΪʲôÎÒÊÕµ½´íÎó¡°<i>ERROR: Memory exhausted in AllocSetAlloc()</i>¡±£¿</h4>
+ <p>ÕâºÜ¿ÉÄÜÊÇϵͳµÄÐéÄâÄÚ´æÓùâÁË£¬»òÕßÄں˶ÔijЩ×ÊÔ´Óнϵ͵ÄÏÞÖÆÖµ¡£ÔÚÆô¶¯ postmaster ֮ǰÊÔÊÔÏÂÃæµÄÃüÁ <br>
+ <br>
+ ulimit -d 262144<br>
+ limit datasize 256m<br>
+ <br>
+ È¡¾öÓÚÄãÓÃµÄ shell£¬ÉÏÃæÃüÁîÖ»ÓÐÒ»ÌõÄܳɹ¦£¬µ«ÊÇËü½«°ÑÄãµÄ½ø³ÌÊý¾Ý¶ÎÏÞÖÆÉèµÃ±È½Ï¸ß£¬Òò¶øÒ²ÐíÄÜÈòéѯÍê³É¡£ÕâÌõÃüÁîÓ¦ÓÃÓÚµ±Ç°½ø³Ì£¬ÒÔ¼°ËùÓÐÔÚÕâÌõÃüÁîÔËÐк󴴽¨µÄ×Ó½ø³Ì¡£Èç¹ûÄãÊÇÔÚÔËÐÐSQL¿Í»§¶ËʱÒòΪºǫ́·µ»ØÁËÌ«¶àµÄÊý¾Ý¶ø³öÏÖÎÊÌ⣬ÇëÔÚÔËÐпͻ§¶Ë֮ǰִÐÐÉÏÊöÃüÁî¡£</p>
+ <h4><a name="4.19"></a>4.19)
+ ÎÒÈçºÎ²ÅÄÜÖªµÀËùÔËÐÐµÄ PostgreSQL µÄ°æ±¾£¿</h4>
+ <p>´Ó psql À¼üÈë SELECT version()£»<br>
+ </p>
+ <h4><a name="4.20"></a>4.20)
+ ΪʲôÎҵĴó¶ÔÏó²Ù×÷µ¼Ö´íÎó¡°<I>invalid large obj descriptor¡±£¨·Ç·¨µÄ´ó¶ÔÏóÃèÊö·û£©</I>£¿</h4>
+ <p>ÄãÐèÒªÔÚʹÓÃÈκδó¶ÔÏó¾ä±úµÄǰºó·ÅÉÏ BEGIN WORK ºÍ COMMIT£¬Ò²¾ÍÊÇ˵£¬°üΧ lo_open ... lo_close¡£ <br>
+ <br>
+ Ŀǰ PostgreSQL Ç¿ÖÆÊµÊ©ÕâÌõ¹æÔò£ºÔÚÊÂÎñÌύʱ¹Ø±Õ´ó¶ÔÏó¾ä±ú£¬ÕâÑù£¬£¨Ã»ÓвÉÓÃÊÂÎñʱ£©£¬Ê״ζԴó¶ÔÏó¾ä±ú×öÈκÎÊÂÇéµÄÆóͼ¶¼»áµ¼ÖÂÒ»¸ö invalid large obj descriptor¡£ËùÒÔ£¬Èç¹ûÄãûÓÐʹÓÃÒ»¸öÊÂÎñ£¬ÒÔǰÄܹ¤×÷µÄ´úÂ루ÖÁÉÙÊÇ´ó¶àÊýʱ¼ä£©½«»áÉú³ÉÕâôһ¸ö´íÎóÐÅÏ¢¡£ <br>
+ <br>
+ Èç¹ûÄãʹÓÿͻ§¶Ë½Ó¿Ú£¬Èç ODBC£¬Äã¿ÉÄÜÐèÒª set auto-commit off¡£</p>
+ <h4><a name="4.21"></a>4.21) ÎÒÈçºÎ´´½¨Ò»¸öȱʡֵÊǵ±Ç°Ê±¼äµÄ×ֶΣ¿</h4>
+ <p>ʹÓà CURRENT_TIMESTAMP£º<br>
+ <br>
+ CREATE TABLE test(x int, modtime timestamp DEFAULT CURRENT_TIMESTAMP);</p>
+ <h4><a name="4.22"></a>4.22) ΪʲôʹÓà IN µÄ×Ó²éѯÕâôÂý£¿</h4>
+ <p>Ŀǰ£¬ÎÒÃÇͨ¹ýΪÍâ²éѯµÄÿһÐÐ˳ÐòɨÃè×Ó²éѯµÄ½á¹ûÀ´Á¬½Ó×Ó²éѯºÍÍâ²éѯ¡£Èç¹û×Ó²éѯ·µ»ØÉÙÊý¼¸ÐУ¬¶øÍâ²éѯ·µ»ØºÜ¶àÐУ¬IN Ö´Ðеúܿ졣ΪÁ˼ӿìÆäËû IN ²éѯµÄÖ´ÐУ¬¿ÉÒÔÓà EXISTS Ìæ»» IN£º <br>
+ <br>
+ SELECT *<br>
+ FROM tab<br>
+ WHERE col IN (SELECT subcol FROM subtab);<br>
+ <br>
+ ¸ÄΪ£º <br>
+ <br>
+ SELECT *<br>
+ FROM tab<br>
+ WHERE EXISTS (SELECT subcol FROM subtab WHERE subcol = col);<br>
+ <br>
+ ºóÕßÒªÏëÖ´Ðеøü¿ì£¬subcol Ó¦¸ÃÊÇÒ»¸öË÷ÒýÁС£ÎÒÃÇÏ£ÍûÔÚδÀ´µÄ·¢²¼°æ±¾ÖÐÐÞ²¹Õâ¸öÏÞÖÆ¡£</p>
+ <h4><a name="4.23"></a>4.23) ÎÒÔõÑù½øÐÐ outer join £¨ÍâÁ¬½Ó£©£¿</h4>
+ <p>PostgreSQL ²ÉÓñê×¼µÄ SQL Óï·¨Ö§³ÖÍâÁ¬½Ó¡£ÕâÀïÊÇÁ½¸öÀý×Ó£º<br>
+ <br>
+ SELECT *<br>
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+ <br>
+ »ò <br>
+ SELECT *<br>
+ FROM t1 LEFT OUTER JOIN t2 USING (col);<br>
+ <br>
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+ <br>
+ ÔÚ´ËǰµÄ°æ±¾ÖУ¬ÍâÁ¬½Ó¿ÉÒÔÓà UNION ºÍ NOT IN À´Ä£Äâ¡£ÀýÈ磬ÏÂÃæµÄÀý×ÓÔÚ±í tab1 ºÍ tab2 Ö®¼ä×öÍâÁ¬½Ó£º<br>
+ <br>
+ SELECT tab1.col1, tab2.col2<br>
+ FROM tab1, tab2<br>
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+ <br>
+ UNION ALL<br>
+ <br>
+ SELECT tab1.col1, NULL<br>
+ FROM tab1<br>
+ WHERE tab1.col1 NOT IN (SELECT tab2.col1 FROM tab2)<br>
+ ORDER BY col1</p>
+ <h4><a name="4.24"></a>4.24)
+ ÈçºÎʹÓÃÉæ¼°¶à¸öÊý¾Ý¿âµÄ²éѯ£¿</h4>
+ <p>ûÓа취²éѯµ±Ç°Êý¾Ý¿âÖ®ÍâµÄÊý¾Ý¿â¡£ÒòΪ PostgreSQL ¼ÓÔØÊý¾Ý¿âÏà¹ØµÄϵͳĿ¼£¨ÏµÍ³±í£©£¬¿çÊý¾Ý¿âµÄ²éѯÈçºÎÖ´ÐÐҲδÃ÷È·¡£<br>
+ <br>
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+ <h4><a name="4.25"></a>4.25)
+ ÈçºÎÈú¯Êý·µ»Ø¶àÐлò¶àÁУ¿</h4>
+ <p>¿ÉÒÔÔÚ PL/pgSQL º¯ÊýÖÐʹÓà refcursors ·µ»Ø½á¹û¼¯¡£²Î¿´
+ <a href="http://www.PostgreSQL.org/idocs/index.php?plpgsql-cursors.html"> http://www.PostgreSQL.org/idocs/index.php?plpgsql-cursors.html</a>, 23.7.3.3½Ú¡£<br>
+ </p>
+ <h4><a name="4.26"></a>4.26) ΪʲôÔÚ
+ PL/PgSQL º¯ÊýÖв»Äܿɿ¿µØ´´½¨»òɾ³ýÁÙʱ±í£¿</h4>
+ <p>PL/PgSQL
+ »º´æº¯ÊýµÄÄÚÈÝ£¬ÓÉ´Ë´øÀ´µÄÒ»¸ö²»ºÃµÄ¸±×÷ÓÃÊÇÈôÒ»¸ö PL/PgSQL
+ º¯Êý·ÃÎÊÁËÒ»¸öÁÙʱ±í£¬È»ºó¸Ã±í±»É¾³ý²¢Öؽ¨ÁË£¬ÔòÔٴε÷Óøú¯Êý½«Ê§°Ü£¬ÒòΪ»º´æµÄº¯ÊýÄÚÈÝÈÔȻָÏò¾ÉµÄÁÙʱ±í¡£½â¾öµÄ·½·¨ÊÇÔÚ
+ PL/PgSQL ÖÐÓÃ EXECUTE
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+ <h4><a name="4.27"></a>4.27)
+ ÓÐÄÄЩÊý¾Ý¸´ÖÆÑ¡Ï</h4>
+ <p>Óм¸ÖÖÖ÷/´Ó·½Ê½µÄ¸´ÖÆÑ¡Ïî¡£ÕâЩѡÏîÖ»ÔÊÐíÖ÷Êý¾Ý¿â½øÐиüУ¬´ÓÊý¾Ý¿âÖ»ÄܽøÐжÁ¡£ÍøÒ³
+ <a href="http://gborg.PostgreSQL.org/genpage?replication_research">http://gborg.PostgreSQL.org/genpage?replication_research</a>
+ µÄ×îºóÁгöÁËÕâЩѡÏî¡£ÔÚ <a href="http://gborg.PostgreSQL.org/project/pgreplication/projdisplay.php"> http://gborg.PostgreSQL.org/project/pgreplication/projdisplay.php</a>
+ ÕýÔÚ½øÐÐÒ»¸ö¶àÖ÷±¾¸´ÖƵĽâ¾ö·½°¸¡£</p>
+ <h4><a name="4.28"></a>4.28)
+ ÓÐÄÄЩÊý¾Ý¼ÓÃÜÑ¡Ï
+ <CENTER>
+ </CENTER>
+ </h4>
+ <p>contrib/pgcrypto °üº¬Á˺ܶàÔÚ SQL
+ ²éѯÖÐʹÓõļÓÃܺ¯Êý¡£¼ÓÃܿͻ§¶Ëµ½·þÎñÆ÷¶Ë´«ÊäÊý¾ÝµÄΨһ·½·¨ÊÇÔÚ pg_hba.conf
+ ÖвÉÓà hostss ¡£ <br>
+ <br>
+ 7.3
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+ postgresql.conf Öдò¿ª PASSWORD_ENCRYPTION
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+ <br>
+ --------------------------------------------------------------------------------</p>
+ <h2 align="center">À©Õ¹ PostgreSQL</h2>
+ <h4><a name="5.1"></a>5.1)
+ ÎÒдÁËÒ»¸öÓû§¶¨Ò庯Êý¡£µ±ÎÒÔÚ psql ÀïÔËÐÐʱ£¬ÎªÊ²Ã´»áµ¼Ö core dump£¿</h4>
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+ <h4><a name="5.2"></a>5.2) ÎÒÈçºÎÄܸø
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+ <p>½«ÄãµÄÀ©Õ¹·¢Ë͵½ pgsql-hackers
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+ </p>
+ <h4><a name="5.3"></a>5.3) ÎÒÔõÑùдһ¸ö·µ»ØÒ»ÌõÔª×éµÄ C º¯Êý£¿</h4>
+ <p>ÔÚ PostgreSQL 7.3 ÒÔºóµÄ°æ±¾ÖУ¬C, PL/PgSQL ºÍ SQL
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+ <p> Makefiles ÖÐûÓаüº¬Í·ÎļþµÄÕýÈ·ÒÀÀµ¡£Äú±ØÐëÏÈ×ömake
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+ </BODY>
+</HTML>
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml index 2df0068b0e9..c6e6921a937 100644 --- a/doc/src/sgml/func.sgml +++ b/doc/src/sgml/func.sgml @@ -1,5 +1,5 @@ <!-- -$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.245 2005/04/13 00:20:10 neilc Exp $ +$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.246 2005/05/11 13:36:14 momjian Exp $ PostgreSQL documentation --> @@ -32,7 +32,9 @@ PostgreSQL documentation <acronym>SQL</acronym> standard. Some of the extended functionality is present in other <acronym>SQL</acronym> database management systems, and in many cases this functionality is compatible and - consistent between the various implementations. + consistent between the various implementations. This chapter is also + not exhaustive; additional functions appear in relivant sections of + the manual. </para> |