Question

is there a way of getting table name for each column in a postgre result in PHP?

Imagine you have a select with join, for example:

$Q = <<<E2OD
    SELECT * FROM user U
    LEFT JOIN department D ON U.department_id = D.id
E2OD;

In PHP/FirebirdSQL:

$R = ibase_query($Q);
$D = ibase_fetch_row($R);
$info = ibase_field_info($R, 0);

Returns

Array
(
    [0] => id
    [name] => id
    [1] => id
    [alias] => id
    [2] => user
    [relation] => user
    [3] => 8
    [length] => 8
    [4] => BIGINT
    [type] => BIGINT
)

While in PHP/PostgreSQL:

$select = $DB->query($Q);
$meta = $select->getColumnMeta(0);

Returns

Array
(
    [pgsql:oid] => 20
    [native_type] => int8
    [name] => id
    [len] => 8
    [precision] => -1
    [pdo_type] => 2
)

As you see, there’s no information about the table the column is from. There’s a missing key [relation] => user or similar displaying the table name.

http://php.net/manual/en/pdostatement.getcolumnmeta.php

Can PHP get this information with it’s PG or PDO libraries? Does PostgreSQL provide this information to client libraries? What needs to be done to make this happen?

Thanks for any hint,

Michal

Answer 1

Check pg_field_table().