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pg_meta_data

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pg_meta_data

(PHP 4 >= 4.3.0, PHP 5)

pg_meta_data 获得表的元数据

说明

array pg_meta_data ( resource $connection , string $table_name )

pg_metadata() 以数组形式返回 table_name 表的定义。如果出错则返回 FALSE

Example #1 取得表的元数据

<?php
    $dbconn 
pg_connect("dbname=publisher") or die("Could not connect");
    
$meta pg_meta_data($dbconn,'authors');
    if (
is_array ($meta)) {
        echo 
'<pre>';
        
var_dump ($meta);
        echo 
'</pre>';
    }
?>

上例输出如下:

array(3) {
  ["author"]=>
  array(5) {
    ["num"]=>
    int(1)
    ["type"]=>
    string(7) "varchar"
    ["len"]=>
    int(-1)
    ["not null"]=>
    bool(false)
    ["has default"]=>
    bool(false)
  }
  ["year"]=>
  array(5) {
    ["num"]=>
    int(2)
    ["type"]=>
    string(4) "int2"
    ["len"]=>
    int(2)
    ["not null"]=>
    bool(false)
    ["has default"]=>
    bool(false)
  }
  ["title"]=>
  array(5) {
    ["num"]=>
    int(3)
    ["type"]=>
    string(7) "varchar"
    ["len"]=>
    int(-1)
    ["not null"]=>
    bool(false)
    ["has default"]=>
    bool(false)
  }
}

Warning

此函数是实验性的。 此函数的表象,包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本扩展风险自担 。

参见 pg_convert()


  • pg_affected_rows
  • pg_cancel_query
  • pg_client_encoding
  • pg_close
  • pg_connect
  • pg_connection_busy
  • pg_connection_reset
  • pg_connection_status
  • pg_convert
  • pg_copy_from
  • pg_copy_to
  • pg_dbname
  • pg_delete
  • pg_end_copy
  • pg_escape_bytea
  • pg_escape_identifier
  • pg_escape_literal
  • pg_escape_string
  • pg_execute
  • pg_fetch_all
  • pg_fetch_all_columns
  • pg_fetch_array
  • pg_fetch_assoc
  • pg_fetch_object
  • pg_fetch_result
  • pg_fetch_row
  • pg_field_is_null
  • pg_field_name
  • pg_field_num
  • pg_field_prtlen
  • pg_field_size
  • pg_field_table
  • pg_field_type
  • pg_field_type_oid
  • pg_free_result
  • pg_get_notify
  • pg_get_pid
  • pg_get_result
  • pg_host
  • pg_insert
  • pg_last_error
  • pg_last_notice
  • pg_last_oid
  • pg_lo_close
  • pg_lo_create
  • pg_lo_export
  • pg_lo_import
  • pg_lo_open
  • pg_lo_read
  • pg_lo_read_all
  • pg_lo_seek
  • pg_lo_tell
  • pg_lo_unlink
  • pg_lo_write
  • pg_meta_data
  • pg_num_fields
  • pg_num_rows
  • pg_options
  • pg_parameter_status
  • pg_pconnect
  • pg_ping
  • pg_port
  • pg_prepare
  • pg_put_line
  • pg_query
  • pg_query_params
  • pg_result_error
  • pg_result_error_field
  • pg_result_seek
  • pg_result_status
  • pg_select
  • pg_send_execute
  • pg_send_prepare
  • pg_send_query
  • pg_send_query_params
  • pg_set_client_encoding
  • pg_set_error_verbosity
  • pg_trace
  • pg_transaction_status
  • pg_tty
  • pg_unescape_bytea
  • pg_untrace
  • pg_update
  • pg_version
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