pg_result_error_field

(PHP 5 >= 5.1.0)

pg_result_error_field — Returns an individual field of an error report.

说明

string pg_result_error_field ( resource $result , int $fieldcode )

pg_result_error_field() returns one of the detailed error message fields associated with result resource. It is only available against a PostgreSQL 7.4 or above server. The error field is specified by the fieldcode.

Because pg_query() and pg_query_params() return FALSE if the query fails, you must use pg_send_query() and pg_get_result() to get the result handle.

If you need to get additional error information from failed pg_query() queries, use pg_set_error_verbosity() and pg_last_error() and then parse the result.

参数

result: A PostgreSQL query result resource from a previously executed statement.
fieldcode: Possible fieldcode values are: PGSQL_DIAG_SEVERITY , PGSQL_DIAG_SQLSTATE , PGSQL_DIAG_MESSAGE_PRIMARY , PGSQL_DIAG_MESSAGE_DETAIL , PGSQL_DIAG_MESSAGE_HINT , PGSQL_DIAG_STATEMENT_POSITION , PGSQL_DIAG_INTERNAL_POSITION (PostgreSQL 8.0+ only), PGSQL_DIAG_INTERNAL_QUERY (PostgreSQL 8.0+ only), PGSQL_DIAG_CONTEXT , PGSQL_DIAG_SOURCE_FILE , PGSQL_DIAG_SOURCE_LINE or PGSQL_DIAG_SOURCE_FUNCTION .

返回值

A string containing the contents of the error field, NULL if the field does not exist or FALSE on failure.

范例

Example #1 pg_result_error_field() example

  <?php
  $dbconn  =  pg_connect ( "dbname=publisher" ) or die( "Could not connect" );

  if (! pg_connection_busy ( $dbconn )) {
       pg_send_query ( $dbconn ,  "select * from doesnotexist;" );
  }
  
   $res1  =  pg_get_result ( $dbconn );
  echo  pg_result_error_field ( $res1 ,  PGSQL_DIAG_SQLSTATE );
 ?>

参见

pg_result_error() - 获得查询结果的错误信息