# ingres_unbuffered_query

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ingres_unbuffered_query — Send an unbuffered SQL query to Ingres

### 说明

ingres_unbuffered_query ( resource `$link` , string `$query` [, array `$params` [, string `$types` ]] ) : mixed

ingres_unbuffered_query() sends the given `query` to the Ingres server.

The query becomes part of the currently open transaction. If there is no open transaction, ingres_unbuffered_query() opens a new transaction. To close the transaction, you can call either ingres_commit() to commit the changes made to the database or ingres_rollback() to cancel these changes. When the script ends, any open transaction is rolled back (by calling ingres_rollback()). You can also use ingres_autocommit() before opening a new transaction to have every SQL query immediately committed. Ingres allows only a single unbuffered statement to be active at any one time. The extension will close any active unbuffered statements before executing any SQL. In addition you cannot use ingres_result_seek() to position the row before fetching.

> Note: Related Configurations

> See also the ingres.describe and ingres.utf8 directives in Runtime Configuration.

### 参数

`link`

  The connection link identifier

`query`

  A valid SQL query (see the Ingres SQL reference guide) in the Ingres documentation. See the query parameter in ingres_query() for a list of SQL statements that cannot be executed via ingres_unbuffered_query().

  Data inside the query should be properly escaped.

`params`

  An array of parameter values to be used with the query

`types`

  A string containing a sequence of types for the parameter values passed. See the types parameter in ingres_query() for the list of type codes.

### 返回值

ingres_unbuffered_query() returns a query result identifier when there are rows to fetch; else it returns `FALSE` when there are no rows, as is the case of an INSERT, UPDATE, or DELETE statement. To see if an error occurred, use ingres_errno(), ingres_error(), or ingres_errsqlstate().

### 范例

Example #1 Issue a simple un-buffered select

    <?php
    $link = ingres_connect("demodb");

    $result = ingres_unbuffered_query($link, "select * from user_profile");
    while ($row = ingres_fetch_row($result)) {
        echo $row[1];
        echo $row[2];
    }
    ?>

Example #2 Passing query parameters to ingres_unbuffered_query()

    <?php
    $link = ingres_connect("demodb");

    $params[] = "Emma";
    $query = "select * from user_profile where up_first = ?";
    $result = ingres_unbuffered_query($link, $query, $params);
    while ($row = ingres_fetch_row($result)) {
        echo $row[1];
        echo $row[2];
    }
    ?>

Example #3 Inserting a BLOB with parameter types

    <?php
    $link = ingres_connect("demodb");

    //Open a photo
    $fh = fopen("photo.jpg","r");
    $blob_data = stream_get_contents($fh);
    fclose($fh);

    //Prepare parameters
    $params[] = $blob_data;
    $params[] = 1201;

    //Define parameter types
    $param_types = "Bi";

    $query = "update user_profile set up_image = ? where up_id = ?";
    $result = ingres_unbuffered_query($link, $query , $params, $param_types);

    if (ingres_errno())
    {
        echo ingres_errno() . "-" . ingres_error() . "\n";
    }
    ?>

### 参见

- ingres_query() - Send an SQL query to Ingres
- ingres_fetch_array() - Fetch a row of result into an array
- ingres_fetch_assoc() - Fetch a row of result into an associative array
- ingres_fetch_object() - Fetch a row of result into an object
- ingres_fetch_row() - Fetch a row of result into an enumerated array
- ingres_commit() - Commit a transaction
- ingres_rollback() - Roll back a transaction
- ingres_autocommit() - Switch autocommit on or off
- ingres_set_environment() - Set environment features controlling output options
- ingres_errno() - Get the last Ingres error number generated
- ingres_error() - Get a meaningful error message for the last error generated