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pg_field_size

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_field_size Restituisce la reale dimensione di memorizzazione del campo

Descrizione

pg_field_size(resource $risultato, int $indice_campo): int

pg_field_size() restituisce la dimensione di memorizzazione (in bytes) del campo indicato all'interno di risultato. La numerazione dei campi comincia da 0. Una dimension del campo di -1 indica un campo a lunghezza variabile. Questa funzione restituisce false in caso di errore.

Nota:

Questa funzione si chiamava pg_fieldsize().

Vedere anche pg_field_prtlen() e pg_field_type().

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User Contributed Notes 3 notes

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0
ij at NOSPAM dot irj dot co dot za
18 years ago
To view the file structure of a table using a sql query

select pg_class.relname, pg_attribute.attname, pg_type.typname, pg_type.typlen from pg_class, pg_attribute, pg_type where pg_class.relname = 'YOURTABLENAME' and pg_class.oid = pg_attribute.attrelid and pg_type.oid = pg_attribute.atttypid having attnum > 0
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0
php at tribun dot de
19 years ago
function get_create_syntax( $table )
{
$qry = "
SELECT *
FROM $table
LIMIT 1
";
$res = pg_query( $qry );
$row = pg_fetch_assoc( $res );

$create = "CREATE TABLE $table \n(\n";

$item = array();
for( $i = 0; $i < count( $row ); $i++ )
{
$name = pg_field_name( $res, $i );
$type = pg_field_type( $res, $i );
$size = pg_field_size( $res, $i );

$item[$i] = '"'.$name.'" '.$type;

$qry = "
SELECT a.atttypmod AS size,
a.attnotnull AS notnull
FROM pg_attribute AS a,
pg_class AS c
WHERE c.relname = '$table'
AND a.attrelid = c.oid
AND a.attname = '$name'
";
$res2 = pg_query( $qry );
$out = pg_fetch_object( $res2 );

if( $out -> size != -1 )
{
$item[$i] .= '('.( $out -> size - 4 ).')';
}
if( $out -> notnull == 't' )
$item[$i] .= ' NOT';

$item[$i] .= ' NULL';

}
$create .= implode( ",\n", $item ) ."\n);";

return $create;
}
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-3
alex at linuxNOSPAM dot org dot pe
21 years ago
How i can extract the struct of a Postgresql Table?

I want to do a dynamic php code, that see the pg table, and print name, type and size of fields
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