PHP连接：

php.ini中将extension=php_pgsql.dll前面的分号去掉，然后设置extension_dir指向php文件下的ext文件夹。

正常情况下这样php就可以连接postgres了，但是我的仍然出错，提示“Fatal error: Call to undefined function pg_connect()”，查看Apache的日志，“PHP Startup: Unable to load dynamic library ‘****\\PHP5\\ext\\php_pdo_pgsql.dll”。

经过查找，在Apache中conf文件夹下的配置文件httpd.conf中添加 LoadFile "***/PHP5/libpq.dll"，位置在LoadModule后面即可。

(***为php安装路径)

重点来了:thinkphp 中的table_msg函数竟然找不到，需要自己手动创建:

在 PostgreSQL 里添加自定义函数 table_msg

复制以下代码到SQL管理器里执行即可：

CREATE OR REPLACE FUNCTION pgsql_type(a_type varchar) RETURNS varchar AS$BODY$DECLAREv_typevarchar;BEGIN

IF a_type=‘int8‘ THENv_type:=‘bigint‘;

ELSIF a_type=‘int4‘ THENv_type:=‘integer‘;

ELSIF a_type=‘int2‘ THENv_type:=‘smallint‘;

ELSIF a_type=‘bpchar‘ THENv_type:=‘char‘;ELSEv_type:=a_type;END IF;RETURNv_type;END;

$BODY$

LANGUAGE PLPGSQL;CREATE TYPE "public"."tablestruct" AS(

"fields_key_name"varchar(100),

"fields_name"VARCHAR(200),

"fields_type"VARCHAR(20),

"fields_length"BIGINT,

"fields_not_null"VARCHAR(10),

"fields_default"VARCHAR(500),

"fields_comment"VARCHAR(1000)

);CREATE OR REPLACE FUNCTION "public"."table_msg" (a_schema_name varchar, a_table_name varchar) RETURNS SETOF "public"."tablestruct" AS$body$DECLAREv_ret tablestruct;

v_oid oid;

v_sqlvarchar;

v_rec RECORD;

v_keyvarchar;BEGIN

SELECTpg_class.oidINTOv_oidFROMpg_classINNER JOIN pg_namespace ON (pg_class.relnamespace = pg_namespace.oid AND lower(pg_namespace.nspname) =a_schema_name)WHEREpg_class.relname=a_table_name;IF NOT FOUND THEN

RETURN;END IF;

v_sql=‘SELECT

pg_attribute.attname AS fields_name,

pg_attribute.attnum AS fields_index,

pgsql_type(pg_type.typname::varchar) AS fields_type,

pg_attribute.atttypmod-4 as fields_length,

CASE WHEN pg_attribute.attnotnull THEN‘‘not null‘‘ELSE‘‘‘‘END AS fields_not_null,

pg_attrdef.adsrc AS fields_default,

pg_description.description AS fields_comment

FROM

pg_attribute

INNER JOIN pg_class ON pg_attribute.attrelid = pg_class.oid

INNER JOIN pg_type ON pg_attribute.atttypid = pg_type.oid

LEFT OUTER JOIN pg_attrdef ON pg_attrdef.adrelid = pg_class.oid AND pg_attrdef.adnum = pg_attribute.attnum

LEFT OUTER JOIN pg_description ON pg_description.objoid = pg_class.oid AND pg_description.objsubid = pg_attribute.attnum

WHERE

pg_attribute.attnum > 0

AND attisdropped <>‘‘t‘‘AND pg_class.oid =‘ || v_oid || ‘ORDER BY pg_attribute.attnum‘;FOR v_rec IN EXECUTEv_sql LOOP

v_ret.fields_name=v_rec.fields_name;

v_ret.fields_type=v_rec.fields_type;IF v_rec.fields_length > 0 THENv_ret.fields_length:=v_rec.fields_length;ELSEv_ret.fields_length:=NULL;END IF;

v_ret.fields_not_null=v_rec.fields_not_null;

v_ret.fields_default=v_rec.fields_default;

v_ret.fields_comment=v_rec.fields_comment;SELECT constraint_name INTO v_key FROM information_schema.key_column_usage WHERE table_schema=a_schema_name AND table_name=a_table_name AND column_name=v_rec.fields_name;IF FOUND THENv_ret.fields_key_name=v_key;ELSEv_ret.fields_key_name=‘‘;END IF;RETURN NEXTv_ret;ENDLOOP;RETURN;END;

$body$

LANGUAGE‘plpgsql‘ VOLATILE CALLED ON NULLINPUT SECURITY INVOKER;

COMMENTON FUNCTION "public"."table_msg"(a_schema_name varchar, a_table_name varchar)IS ‘获得表信息‘;---重载一个函数

CREATE OR REPLACE FUNCTION "public"."table_msg" (a_table_name varchar) RETURNS SETOF "public"."tablestruct" AS$body$DECLAREv_ret tablestruct;BEGIN

FOR v_ret IN SELECT * FROM table_msg(‘public‘,a_table_name) LOOPRETURN NEXTv_ret;ENDLOOP;RETURN;END;

$body$

LANGUAGE‘plpgsql‘ VOLATILE CALLED ON NULLINPUT SECURITY INVOKER;

COMMENTON FUNCTION "public"."table_msg"(a_table_name varchar)IS ‘获得表信息‘;

修改 ThinkPHP 源代码里面的 BUG

把 ThinkPHP\Library\Think\Db\Driver\Pgsql.class.php 第 41 行 修改为：

$result = $this->query(‘select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg(\‘‘.$tableName.‘\‘);‘);

也就是在 $tableName 前后各添加一个单引号，(‘.$tableName.‘) => (\‘‘.$tableName.‘\‘)。

除了上面的问题，我还发现，M(‘table‘)->add()不能正常的返回新增记录的主键id值。

原文：http://www.cnblogs.com/blueskycc/p/5057334.html