FrontBase Функции
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fbsql_query

(PHP 4 >= 4.0.6, PHP 5)

fbsql_query — Send a FrontBase query

Описание

resource fbsql_query ( string $query [, resource $link_identifier [, int $batch_size ]] )

Sends a query to the currently active database on the server.

If the query succeeds, you can call fbsql_num_rows() to find out how many rows were returned for a SELECT statement or fbsql_affected_rows() to find out how many rows were affected by a DELETE, INSERT, REPLACE, or UPDATE statement.

Список параметров

query

The SQL query to be executed.

Замечание:

The query string shall always end with a semicolon.

link_identifier

Идентификатор соединения FrontBase, полученный из fbsql_connect() или fbsql_pconnect().

Если он не был указан, то функция попытается найти открытое соединение к серверу FrontBase, в случае неудачи попытается создать новое, как если бы fbsql_connect() была вызвана без аргументов.

batch_size

Возвращаемые значения

fbsql_query() returns TRUE (non-zero) or FALSE to indicate whether or not the query succeeded. A return value of TRUE means that the query was legal and could be executed by the server. It does not indicate anything about the number of rows affected or returned. It is perfectly possible for a query to succeed but affect no rows or return no rows.

For SELECT statements, fbsql_query() returns a new result identifier that you can pass to fbsql_result().

fbsql_query() will also fail and return FALSE if you don't have permission to access the table(s) referenced by the query.

Примеры

The following query is syntactically invalid, so fbsql_query() fails and returns FALSE:

Пример #1 fbsql_query() example

<?php
$result = fbsql_query("SELECT * WHERE 1=1")
    or die ("Invalid query");
?>

The following query is semantically invalid if my_col is not a column in the table my_tbl, so fbsql_query() fails and returns FALSE:

Пример #2 fbsql_query() example

<?php
$result = fbsql_query ("SELECT my_col FROM my_tbl;")
    or die ("Invalid query");
?>

Смотрите также

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