Php/docs/function.db2-fetch-row
db2_fetch_row
(PECL ibm_db2 >= 1.0.0)
db2_fetch_row — Sets the result set pointer to the next row or requested row
说明
db2_fetch_row
( resource $stmt
[, int $row_number
] ) : bool
Use db2_fetch_row() to iterate through a result set, or to point to a specific row in a result set if you requested a scrollable cursor.
To retrieve individual fields from the result set, call the db2_result() function.
Rather than calling db2_fetch_row() and db2_result(), most applications will call one of db2_fetch_assoc(), db2_fetch_both(), or db2_fetch_array() to advance the result set pointer and return a complete row as an array.
参数
stmt- A valid
stmtresource. row_number- With scrollable cursors, you can request a specific row number in the result set. Row numbering is 1-indexed.
返回值
Returns true if the requested row exists in the result set. Returns
false if the requested row does not exist in the result set.
范例
Example #1 Iterating through a result set
The following example demonstrates how to iterate through a result set with db2_fetch_row() and retrieve columns from the result set with db2_result().
<?php$sql = 'SELECT name, breed FROM animals WHERE weight < ?';$stmt = db2_prepare($conn, $sql);db2_execute($stmt, array(10));while (db2_fetch_row($stmt)) { $name = db2_result($stmt, 0); $breed = db2_result($stmt, 1); print "$name $breed";}?>
以上例程会输出：
cat Pook gold fish Bubbles budgerigar Gizmo goat Rickety Ride
Example #2 i5/OS recommended alternatives to db2_fetch_row/db2_result
On i5/OS it is recommended that you use db2_fetch_both(),
db2_fetch_array(), or db2_fetch_object()
over db2_fetch_row()/db2_result(). In general
db2_fetch_row()/db2_result() have more issues
with various column types in EBCIDIC to ASCII
translation, including possible truncation in DBCS applications.
You may also find the performance of db2_fetch_both(),
db2_fetch_array(), and db2_fetch_object() to
be superior to db2_fetch_row()/db2_result().
<?php $conn = db2_connect("","",""); $sql = 'SELECT SPECIFIC_SCHEMA, SPECIFIC_NAME, ROUTINE_SCHEMA, ROUTINE_NAME, ROUTINE_TYPE, ROUTINE_CREATED, ROUTINE_BODY, IN_PARMS, OUT_PARMS, INOUT_PARMS, PARAMETER_STYLE, EXTERNAL_NAME, EXTERNAL_LANGUAGE FROM QSYS2.SYSROUTINES FETCH FIRST 2 ROWS ONLY'; $stmt = db2_exec($conn, $sql, array('cursor' => DB2_SCROLLABLE)); while ($row = db2_fetch_both($stmt)){ echo "<br>db2_fetch_both {$row['SPECIFIC_NAME']} {$row['ROUTINE_CREATED']} {$row[5]}"; } $stmt = db2_exec($conn, $sql, array('cursor' => DB2_SCROLLABLE)); while ($row = db2_fetch_array($stmt)){ echo "<br>db2_fetch_array {$row[1]} {$row[5]}"; } $stmt = db2_exec($conn, $sql, array('cursor' => DB2_SCROLLABLE)); while ($row = db2_fetch_object($stmt)){ echo "<br>db2_fetch_object {$row->SPECIFIC_NAME} {$row->ROUTINE_CREATED}"; } db2_close($conn);?>
以上例程会输出：
db2_fetch_both MATCH_ANIMAL 2006-08-25-17.10.23.775000 2006-08-25-17.10.23.775000 db2_fetch_both MULTIRESULTS 2006-10-17-10.11.05.308000 2006-10-17-10.11.05.308000 db2_fetch_array MATCH_ANIMAL 2006-08-25-17.10.23.775000 db2_fetch_array MULTIRESULTS 2006-10-17-10.11.05.308000 db2_fetch_object MATCH_ANIMAL 2006-08-25-17.10.23.775000 db2_fetch_object MULTIRESULTS 2006-10-17-10.11.05.308000
参见
- db2_fetch_array() - Returns an array, indexed by column position, representing a row in a result set
- db2_fetch_assoc() - Returns an array, indexed by column name, representing a row in a result set
- db2_fetch_both() - Returns an array, indexed by both column name and position, representing a row in a result set
- db2_fetch_object() - Returns an object with properties representing columns in the fetched row
- db2_result() - Returns a single column from a row in the result set
