PHP:pg_result_error_field()的用法_PostgreSQL函数

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pg_result_error_field

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(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$dbconn=pg_connect("dbname=publisher")ordie("Couldnotconnect");if(!pg_connection_busy($dbconn)){pg_send_query($dbconn,"select*fromdoesnotexist;");}$res1=pg_get_result($dbconn);echopg_result_error_field($res1,PGSQL_DIAG_SQLSTATE);?>

参见

pg_result_error() - 获得查询结果的错误信息

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