thinkphp3.2连接 Postgres SQL

Posted 2023-04-01 jugt

1.开启php扩展

查看php 目录下的ext文件夹中，是否有php_pdo_pgsql.dll和php_pgsql.dll，如果没有，自己想办法

打开php.ini 写入下面两行

• extension=php_pdo_pgsql.dll
• extension=php_pgsql.dll

2.配置tp的数据库连接参数（config.php 或是 database.php）

return [
    'DB_TYPE'               =>  'Pgsql',     	// 数据库类型
    'DB_HOST'               =>  'localhost', 	// 服务器地址
    'DB_NAME'               =>  'db_test',      // 数据库名
    'DB_USER'               =>  'postgres',     // 用户名
    'DB_PWD'                =>  'root',         // 密码
    'DB_PORT'               =>  '5432',        	// 端口
    'DB_PREFIX'             =>  '',   			// 数据库表前缀
    'DB_PARAMS'          	=>  [], 			// 数据库连接参数
    'DB_DEBUG'  			=>  TRUE, 			// 数据库调试模式 开启后可以记录SQL日志
    'DB_FIELDS_CACHE'       =>  true,        	// 启用字段缓存
    'DB_CHARSET'            =>  'utf8',      	// 数据库编码默认采用utf8
];

3.尝试连接，如果不报错误，连接完成

4.错误：

A.错误1

SQLSTATE[08006] [7] authentication method 10 not supported

修改PostgresSQL安装目录中data文件夹下的pg_hba.conf文件，

# IPv4 local connections:
#host    all             all             127.0.0.1/32            scram-sha-256
host    all             all             127.0.0.1/32            trust

将scram-sha-256改为trust，保存后，重启postgressql服务。

B.错误2

7:错误: 字段 “test” 不存在 LINE 1: …as “default”,fields_default as “extra” from table_msg(test); ^ [ SQL语句 ] : 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(test);

修改\\ThinkPHP核心文件目录\\Library\\Think\\Db\\Driver.class.php文件中，第41行，将

$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.');');

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.'\\');');

主要就是最后面的$tableName增加’转义

from table_msg(\\''.$tableName.'\\')

保存文件，尝试。

C.错误3

7:错误: 函数 table_msg(unknown) 不存在 LINE 1: …fault as “default”,fields_default as “extra” from table_msg(… ^ HINT: 没有匹配指定名称和参数类型的函数. 您也许需要增加明确的类型转换. [ SQL语句 ] : 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(‘test’);

在PostgresSQL中运行以下sql文件

CREATE OR REPLACE FUNCTION pgsql_type(a_type varchar) RETURNS varchar AS
$BODY$
DECLARE
     v_type varchar;
BEGIN
     IF a_type='int8' THEN
          v_type:='bigint';
     ELSIF a_type='int4' THEN
          v_type:='integer';
     ELSIF a_type='int2' THEN
          v_type:='smallint';
     ELSIF a_type='bpchar' THEN
          v_type:='char';
     ELSE
          v_type:=a_type;
     END IF;
     RETURN v_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
$body$
DECLARE
     v_ret tablestruct;
     v_oid oid;
     v_sql varchar;
     v_rec RECORD;
     v_key varchar;
BEGIN
     SELECT
           pg_class.oid  INTO v_oid
     FROM
           pg_class
           INNER JOIN pg_namespace ON (pg_class.relnamespace = pg_namespace.oid AND lower(pg_namespace.nspname) = a_schema_name)
     WHERE
           pg_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,
           '''' 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 EXECUTE v_sql LOOP
         v_ret.fields_name=v_rec.fields_name;
         v_ret.fields_type=v_rec.fields_type;
         IF v_rec.fields_length > 0 THEN
            v_ret.fields_length:=v_rec.fields_length;
         ELSE
            v_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 THEN
            v_ret.fields_key_name=v_key;
         ELSE
            v_ret.fields_key_name='';
         END IF;
         RETURN NEXT v_ret;
     END LOOP;
     RETURN ;
END;
$body$
LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER;

COMMENT ON 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
$body$
DECLARE
    v_ret tablestruct;
BEGIN
    FOR v_ret IN SELECT * FROM table_msg('public',a_table_name) LOOP
        RETURN NEXT v_ret;
    END LOOP;
    RETURN;
END;
$body$
LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER;

COMMENT ON FUNCTION "public"."table_msg"(a_table_name varchar)
IS '获得表信息';