PostgreSQL 函數

注釋

注意:
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.

注意:
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.

注意:
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 ("").

注意:
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.

pg_affected_rows — 返回受影響的記錄數目
pg_cancel_query — 取消異步查詢(xún)
pg_client_encoding — 取得客戶(hù)端編碼方式
pg_close — 關(guān)閉一個(gè) PostgreSQL 連接
pg_connect_poll — 正在進(jìn)行嘗試輪詢(xún) PostgreSQL 鏈接狀態(tài)。
pg_connect — 打開(kāi)一個(gè) PostgreSQL 連接
pg_connection_busy — 獲知連接是否為忙
pg_connection_reset — 重置連接（再次連接）
pg_connection_status — 獲得連接狀態(tài)
pg_consume_input — Reads input on the connection
pg_convert — 將關(guān)聯(lián)的數組值轉換為適合 SQL 語(yǔ)句的格式。
pg_copy_from — 根據數組將記錄插入表中
pg_copy_to — 將一個(gè)表拷貝到數組中
pg_dbname — 獲得數據庫名
pg_delete — 刪除記錄
pg_end_copy — 與 PostgreSQL 后端同步
pg_escape_bytea — 轉義 bytea 類(lèi)型的二進(jìn)制數據
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 — 轉義 text/char 類(lèi)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 — 從結果中提取所有行作為一個(gè)數組
pg_fetch_array — 提取一行作為數組
pg_fetch_assoc — 提取一行作為關(guān)聯(lián)數組
pg_fetch_object — 提取一行作為對象
pg_fetch_result — 從結果資源中返回值
pg_fetch_row — 提取一行作為枚舉數組
pg_field_is_null — 測試字段是否為 null
pg_field_name — 返回字段的名字
pg_field_num — 返回字段的編號
pg_field_prtlen — 返回打印出來(lái)的長(cháng)度
pg_field_size — 返回指定字段占用內部存儲空間的大小
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 — 返回相應字段的類(lèi)型名稱(chēng)
pg_flush — 刷新鏈接中已處理的數據查詢(xún)
pg_free_result — 釋放查詢(xún)結果占用的內存
pg_get_notify — Ping 數據庫連接
pg_get_pid — Ping 數據庫連接
pg_get_result — 取得異步查詢(xún)結果
pg_host — 返回和某連接關(guān)聯(lián)的主機名
pg_insert — 將數組插入到表中
pg_last_error — 得到某連接的最后一條錯誤信息
pg_last_notice — 返回 PostgreSQL 服務(wù)器最新一條公告信息
pg_last_oid — 返回上一個(gè)對象的 oid
pg_lo_close — 關(guān)閉一個(gè)大型對象
pg_lo_create — 新建一個(gè)大型對象
pg_lo_export — 將大型對象導出到文件
pg_lo_import — 將文件導入為大型對象
pg_lo_open — 打開(kāi)一個(gè)大型對象
pg_lo_read_all — 讀入整個(gè)大型對象并直接發(fā)送給瀏覽器
pg_lo_read — 從大型對象中讀入數據
pg_lo_seek — 移動(dòng)大型對象中的指針
pg_lo_tell — 返回大型對象的當前指針位置
pg_lo_truncate — Truncates a large object
pg_lo_unlink — 刪除一個(gè)大型對象
pg_lo_write — 向大型對象寫(xiě)入數據
pg_meta_data — 獲得表的元數據
pg_num_fields — 返回字段的數目
pg_num_rows — 返回行的數目
pg_options — 獲得和連接有關(guān)的選項
pg_parameter_status — Looks up a current parameter setting of the server
pg_pconnect — 打開(kāi)一個(gè)持久的 PostgreSQL 連接
pg_ping — Ping 數據庫連接
pg_port — 返回該連接的端口號
pg_prepare — Submits a request to create a prepared statement with the given parameters, and waits for completion
pg_put_line — 向 PostgreSQL 后端發(fā)送以 NULL 結尾的字符串
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 — 執行查詢(xún)
pg_result_error_field — Returns an individual field of an error report
pg_result_error — 獲得查詢(xún)結果的錯誤信息
pg_result_seek — 在結果資源中設定內部行偏移量
pg_result_status — 獲得查詢(xún)結果的狀態(tài)
pg_select — 選擇記錄
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 — 發(fā)送異步查詢(xún)
pg_set_client_encoding — 設定客戶(hù)端編碼
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 — 啟動(dòng)一個(gè) PostgreSQL 連接的追蹤功能
pg_transaction_status — Returns the current in-transaction status of the server
pg_tty — 返回該連接的 tty 號
pg_unescape_bytea — 取消 bytea 類(lèi)型中的字符串轉義
pg_untrace — 關(guān)閉 PostgreSQL 連接的追蹤功能
pg_update — 更新表
pg_version — Returns an array with client, protocol and server version (when available)

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PostgreSQL 函數

注釋

目錄