PostgreSQL 函数

目录

• pg_affected_rows — 返回受影响的记录数（元组）
• pg_cancel_query — 取消异步查询
• pg_client_encoding — 获取客户端编码
• pg_close — 关闭 PostgreSQL 连接
• pg_connect — 打开 PostgreSQL 连接
• pg_connect_poll — 对正在进行尝试进行异步的 PostgreSQL 连接轮询其状态。
• pg_connection_busy — 获取连接是否繁忙
• pg_connection_reset — 重置连接（再次连接）
• pg_connection_status — 获取连接状态
• pg_consume_input — Reads input on the connection
• pg_convert — 将关联的数组值转换为适合 SQL 语句的格式
• pg_copy_from — 将数组中的记录插入到表
• pg_copy_to — 将表复制到数组
• pg_dbname — 获取数据库名称
• pg_delete — 删除记录
• pg_end_copy — 与 PostgreSQL 后端同步
• pg_escape_bytea — 转义字符串以插入到 bytea 字段
• pg_escape_identifier — Escape a identifier for insertion into a text field
• pg_escape_literal — Escape a literal for insertion into a text field
• pg_escape_string — 转义字符串以供查询
• pg_execute — Sends a request to execute a prepared statement with given parameters, and waits for the result
• pg_fetch_all — 从结果中获取所有行作为数组
• pg_fetch_all_columns — Fetches all rows in a particular result column as an array
• pg_fetch_array — 获取一行作为数组
• pg_fetch_assoc — 获取一行作为关联数组
• pg_fetch_object — 获取一行作为对象
• pg_fetch_result — 从结果实例返回值
• pg_fetch_row — 提取一行作为枚举数组
• pg_field_is_null — 测试字段是否为 SQL NULL
• pg_field_name — 返回字段名
• pg_field_num — 返回名为 field 的字段编号
• pg_field_prtlen — 返回打印的长度
• pg_field_size — 返回指定字段的内部存储大小
• pg_field_table — Returns the name or oid of the tables field
• pg_field_type — 返回相应字段编号的类型名称
• pg_field_type_oid — Returns the type ID (OID) for the corresponding field number
• pg_flush — 刷新链接中已处理的数据查询
• pg_free_result — 释放查询结果占用的内存
• pg_get_notify — 获取 SQL NOTIFY 消息
• pg_get_pid — 获取后端的进程 ID
• pg_get_result — 取得异步查询结果
• pg_host — 返回和某连接关联的主机名
• pg_insert — 将数组插入到表中
• pg_last_error — 得到某连接的最后一条错误信息
• pg_last_notice — 返回 PostgreSQL 服务器最新一条公告信息
• pg_last_oid — 返回上一条记录的 oid
• pg_lo_close — 关闭大对象
• pg_lo_create — 新建大对象
• pg_lo_export — 将大型对象导出到文件
• pg_lo_import — 将文件导入为大型对象
• pg_lo_open — 打开大对象
• pg_lo_read — 读取大对象
• pg_lo_read_all — 读取整个大对象并直接发送到浏览器
• pg_lo_seek — 在大对象中寻找位置
• pg_lo_tell — 返回当前大型对象的指针位置
• pg_lo_truncate — Truncates a large object
• pg_lo_unlink — 删除一个大型对象
• pg_lo_write — 向大对象写入数据
• pg_meta_data — 获得表的元数据
• pg_num_fields — 返回结果中字段的数量
• pg_num_rows — 返回结果中行的数量
• pg_options — 获得和 connection 相关的选项
• pg_parameter_status — Looks up a current parameter setting of the server
• pg_pconnect — 打开一个持久的 PostgreSQL 连接
• pg_ping — Ping 数据库连接
• pg_port — 返回 connection 相关的端口号
• pg_prepare — Submits a request to the server to create a prepared statement with the given parameters, and waits for completion
• pg_put_line — 向 PostgreSQL 后端发送以 NULL 字符结尾的字符串
• pg_query — 执行查询
• pg_query_params — Submits a command to the server and waits for the result, with the ability to pass parameters separately from the SQL command text
• pg_result_error — 获得跟 result 相关的错误信息
• pg_result_error_field — Returns an individual field of an error report
• pg_result_memory_size — Returns the amount of memory allocated for a query result
• pg_result_seek — 在 result 实例中设定内部行偏移量
• pg_result_status — 获得查询结果的状态
• pg_select — 选择记录
• pg_send_execute — Sends a request to execute a prepared statement with given parameters, without waiting for the result(s)
• pg_send_prepare — Sends a request to create a prepared statement with the given parameters, without waiting for completion
• pg_send_query — 发送异步查询
• pg_send_query_params — Submits a command and separate parameters to the server without waiting for the result(s)
• pg_set_chunked_rows_size — Set the query results to be retrieved in chunk mode
• pg_set_client_encoding — 设定客户端编码
• pg_set_error_context_visibility — Determines the visibility of the context's error messages returned by pg_last_error and pg_result_error
• pg_set_error_verbosity — Determines the verbosity of messages returned by pg_last_error and pg_result_error
• pg_socket — Get a read only handle to the socket underlying a PostgreSQL connection
• pg_trace — 启用 PostgreSQL 连接的追踪
• pg_transaction_status — Returns the current in-transaction status of the server
• pg_tty — 返回跟连接相关的 tty 名
• pg_unescape_bytea — 反转义 bytea 类型的二进制数据
• pg_untrace — 禁用 PostgreSQL 连接的追踪
• pg_update — 更新表
• pg_version — Returns an array with client, protocol and server version (when available)

A simple conversion for 1D PostgreSQL array data:

// =====
//Example #1 (An array of IP addresses):
<?php
  $pgsqlArr = '{192.168.1.1,10.1.1.1}';

  preg_match('/^{(.*)}$/', $pgsqlArr, $matches);
  $phpArr = str_getcsv($matches[1]);

  print_r($phpArr);
}
// Output:
// Array
// (
//    [0] => 192.168.1.1
//    [1] => 10.1.1.1
// )
// =====

// =====
// Example #2 (An array of strings including spaces and commas):
<?php
  $pgsqlArr = '{string1,string2,"string,3","string 4"}';

  preg_match('/^{(.*)}$/', $pgsqlArr, $matches);
  $phpArr = str_getcsv($matches[1]);

  print_r($phpArr);
}
// Output:
// Array
// (
//    [0] => string1
//    [1] => string2
//    [2] => string,3
//    [3] => string 4
// )
// =====

I've found another function to mimic the following mysql list tables function (http://www.php.net/manual/en/function.mysql-list-tables.php) that's more useful for my target:

function pg_list_tables() {
      $sql = "SELECT a.relname AS Name
          FROM pg_class a, pg_user b
          WHERE ( relkind = 'r') and relname !~ '^pg_' AND relname !~ '^sql_'
          AND relname !~ '^xin[vx][0-9]+' AND b.usesysid = a.relowner
          AND NOT (EXISTS (SELECT viewname FROM pg_views WHERE viewname=a.relname));";
      return(pg_query($conn, $sql));
}

Running RedHat Linux and Apache with suexec enabled you must include pgsql.so on each .php file using dl("pgsql.so") and remove "extension=pgsql.so" from php.ini, otherwise Apache (httpd) will not start.