ColumnResult::__construct

(사용 가능한 버전 정보가 없으며 Git에만 있을 수 있음)

ColumnResult::__construct — ColumnResult constructor

설명

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private mysql_xdevapi\ColumnResult::__construct()

문자 집합과 같은 열 메타데이터를 검색합니다. 이것은 RowResult::getColumns() 메소드에 의해 인스턴스화됩니다.

매개변수

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이 함수에는 매개변수가 없습니다.

Examples

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예제 #1 mysql_xdevapi\ColumnResult::__construct() 예제

                  
<?php
$session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");

$session->sql("DROP DATABASE IF EXISTS nonsense")->execute();
$session->sql("CREATE DATABASE nonsense")->execute();
$session->sql("CREATE TABLE nonsense.numbers (hello int, world float unsigned)")->execute();
$session->sql("INSERT INTO  nonsense.numbers values (42, 42)")->execute();

$schema = $session->getSchema("nonsense");
$table  = $schema->getTable("numbers");

$result1 = $table->select('hello','world')->execute();

// Returns an array of ColumnResult objects
$columns = $result1->getColumns();

foreach ($columns as $column) {
    echo "\nColumn label " , $column->getColumnLabel();
    echo " is type "       , $column->getType();
    echo " and is ", ($column->isNumberSigned() === 0) ? "Unsigned." : "Signed.";
}

// Alternatively
$result2 = $session->sql("SELECT * FROM nonsense.numbers")->execute();

// Returns an array of FieldMetadata objects
print_r($result2->getColumns());
                  
                

위의 예는 다음과 유사한 결과를 출력합니다.

Column label hello is type 19 and is Signed.
Column label world is type 4  and is Unsigned.

Array
(
    [0] => mysql_xdevapi\FieldMetadata Object
        (
            [type] => 1
            [type_name] => SINT
            [name] => hello
            [original_name] => hello
            [table] => numbers
            [original_table] => numbers
            [schema] => nonsense
            [catalog] => def
            [collation] => 0
            [fractional_digits] => 0
            [length] => 11
            [flags] => 0
            [content_type] => 0
        )
    [1] => mysql_xdevapi\FieldMetadata Object
        (
            [type] => 6
            [type_name] => FLOAT
            [name] => world
            [original_name] => world
            [table] => numbers
            [original_table] => numbers
            [schema] => nonsense
            [catalog] => def
            [collation] => 0
            [fractional_digits] => 31
            [length] => 12
            [flags] => 1
            [content_type] => 0
        )
)