Php/docs/ref.pgsql

• PHP Manual
• PostgreSQL
• PostgreSQL 函数

注释

Note:

Not all functions are supported by all builds. It depends on your libpq (The PostgreSQL C client library) version and how libpq is compiled. If PHP PostgreSQL extensions are missing, then it is because your libpq version does not support them.

Note:

Most PostgreSQL functions accept connection as the optional first parameter. If it is not provided, the last opened connection is used. If it doesn't exist, functions return false.

Note:

PostgreSQL automatically folds all identifiers (e.g. table/column names) to lower-case values at object creation time and at query time. To force the use of mixed or upper case identifiers, you must escape the identifier using double quotes ("").

Note:

PostgreSQL does not have special commands for fetching database schema information (eg. all the tables in the current database). Instead, there is a standard schema named information_schema in PostgreSQL 7.4 and above containing system views with all the necessary information, in an easily queryable form. See the » PostgreSQL Documentation for full details.

Table of Contents

• pg_affected_rows — 返回受影响的记录数目
• pg_cancel_query — 取消异步查询
• pg_client_encoding — 取得客户端编码方式
• pg_close — 关闭一个 PostgreSQL 连接
• pg_connect_poll — 正在进行尝试轮询 PostgreSQL 链接状态。
• pg_connect — 打开一个 PostgreSQL 连接
• pg_connection_busy — 获知连接是否为忙
• pg_connection_reset — 重置连接（再次连接）
• pg_connection_status — 获得连接状态
• 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 — 根据数组将记录插入表中
• pg_copy_to — 将一个表拷贝到数组中
• pg_dbname — 获得数据库名
• pg_delete — 删除记录
• pg_end_copy — 与 PostgreSQL 后端同步
• pg_escape_bytea — 转义 bytea 类型的二进制数据
• 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 text/char 类型的字符串
• pg_execute — Sends a request to execute a prepared statement with given parameters, and waits for the result
• pg_fetch_all_columns — Fetches all rows in a particular result column as an array
• pg_fetch_all — 从结果中提取所有行作为一个数组
• pg_fetch_array — 提取一行作为数组
• pg_fetch_assoc — 提取一行作为关联数组
• pg_fetch_object — 提取一行作为对象
• pg_fetch_result — 从结果资源中返回值
• pg_fetch_row — 提取一行作为枚举数组
• pg_field_is_null — 测试字段是否为 null
• pg_field_name — 返回字段的名字
• pg_field_num — 返回字段的编号
• pg_field_prtlen — 返回打印出来的长度
• pg_field_size — 返回指定字段占用内部存储空间的大小
• pg_field_table — Returns the name or oid of the tables field
• pg_field_type_oid — Returns the type ID (OID) for the corresponding field number
• pg_field_type — 返回相应字段的类型名称
• 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 — Ping 数据库连接
• pg_get_pid — Ping 数据库连接
• 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 — 返回上一个对象的 oid
• pg_lo_close — 关闭一个大型对象
• pg_lo_create — 新建一个大型对象
• 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 — 打开一个大型对象
• pg_lo_read_all — 读入整个大型对象并直接发送给浏览器
• pg_lo_read — 从大型对象中读入数据
• pg_lo_seek — 移动大型对象中的指针
• pg_lo_tell — 返回大型对象的当前指针位置
• pg_lo_truncate — Truncates a large object
• pg_lo_unlink — 删除一个大型对象
• pg_lo_write — 向大型对象写入数据
• pg_meta_data — 获得表的元数据
• pg_num_fields — 返回字段的数目
• pg_num_rows — 返回行的数目
• pg_options — 获得和连接有关的选项
• 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 — 返回该连接的端口号
• pg_prepare — Submits a request to create a prepared statement with the given parameters, and waits for completion
• pg_put_line — 向 PostgreSQL 后端发送以 NULL 结尾的字符串
• 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_query — 执行查询
• pg_result_error_field — Returns an individual field of an error report
• pg_result_error — 获得查询结果的错误信息
• pg_result_seek — 在结果资源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_params — Submits a command and separate parameters to the server without waiting for the result(s)
• pg_send_query — 发送异步查询
• pg_set_client_encoding — 设定客户端编码
• 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 — 启动一个 PostgreSQL 连接的追踪功能
• pg_transaction_status — Returns the current in-transaction status of the server
• pg_tty — 返回该连接的 tty 号
• pg_unescape_bytea — 取消 bytea 类型中的字符串转义
• pg_untrace — 关闭 PostgreSQL 连接的追踪功能
• pg_update — 更新表
• pg_version — Returns an array with client, protocol and server version (when available)