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<?php
/**
* PHPPgAdmin v6.0.0-RC1
*/
namespace PHPPgAdmin\Database\Traits;
/**
* Common trait for tables manipulation.
*/
trait SchemaTrait
{
// Schema functons
/**
* Return all schemas in the current database.
*
* @return \PHPPgAdmin\ADORecordSet All schemas, sorted alphabetically
*/
public function getSchemas()
{
$conf = $this->conf;
if (!$conf['show_system']) {
$where = "WHERE nspname NOT LIKE 'pg@_%' ESCAPE '@' AND nspname != 'information_schema'";
} else {
$where = "WHERE nspname !~ '^pg_t(emp_[0-9]+|oast)$'";
}
$sql = "
SELECT pn.nspname,
pu.rolname AS nspowner,
pg_catalog.obj_description(pn.oid, 'pg_namespace') AS nspcomment, ";
/*
* Either display_sizes is true for tables and schemas,
* or we must check if said config is an associative array
*/
if (isset($this->conf['display_sizes']) &&
(
$this->conf['display_sizes'] === true ||
(
is_array($this->conf['display_sizes']) &&
array_key_exists('schemas', $this->conf['display_sizes']) &&
$this->conf['display_sizes']['schemas'] === true
)
)
) {
$sql .= ' pg_size_pretty(SUM(pg_total_relation_size(pg_class.oid))) as schema_size ';
} else {
$sql .= " 'N/A' as schema_size ";
}
$sql .= " FROM pg_catalog.pg_namespace pn
LEFT JOIN pg_catalog.pg_class ON relnamespace = pn.oid
LEFT JOIN pg_catalog.pg_roles pu ON (pn.nspowner = pu.oid)
{$where}
GROUP BY pn.nspname, pu.rolname, pg_catalog.obj_description(pn.oid, 'pg_namespace')
ORDER BY nspname";
return $this->selectSet($sql);
}
/**
* Sets the current working schema. Will also set Class variable.
*
* @param string $schema The the name of the schema to work in
*
* @return int 0 if operation was successful
*/
public function setSchema($schema)
{
// Get the current schema search path, including 'pg_catalog'.
$search_path = $this->getSearchPath();
// Prepend $schema to search path
array_unshift($search_path, $schema);
$status = $this->setSearchPath($search_path);
if ($status == 0) {
$this->_schema = $schema;
return 0;
}
return $status;
}
/**
* Return the current schema search path.
*
* @return array array of schema names
*/
public function getSearchPath()
{
$sql = 'SELECT current_schemas(false) AS search_path';
$fetchMode = $this->conn->fetchMode;
$this->conn->setFetchMode(\ADODB_FETCH_ASSOC);
$search_path = $this->selectField($sql, 'search_path');
$this->conn->setFetchMode($fetchMode);
return $this->phpArray($search_path);
}
/**
* Sets the current schema search path.
*
* @param mixed $paths An array of schemas in required search order
*
* @return int 0 if operation was successful
*/
public function setSearchPath($paths)
{
if (!is_array($paths)) {
return -1;
}
if (sizeof($paths) == 0) {
return -2;
}
if (sizeof($paths) == 1 && $paths[0] == '') {
// Need to handle empty paths in some cases
$paths[0] = 'pg_catalog';
}
// Loop over all the paths to check that none are empty
$temp = [];
foreach ($paths as $schema) {
if ($schema != '') {
$temp[] = $schema;
}
}
$this->fieldArrayClean($temp);
$sql = 'SET SEARCH_PATH TO "'.implode('","', $temp).'"';
return $this->execute($sql);
}
/**
* Creates a new schema.
*
* @param string $schemaname The name of the schema to create
* @param string $authorization (optional) The username to create the schema for
* @param string $comment (optional) If omitted, defaults to nothing
*
* @return bool|int 0 success
*/
public function createSchema($schemaname, $authorization = '', $comment = '')
{
$this->fieldClean($schemaname);
$this->fieldClean($authorization);
$sql = "CREATE SCHEMA \"{$schemaname}\"";
if ($authorization != '') {
$sql .= " AUTHORIZATION \"{$authorization}\"";
}
if ($comment != '') {
$status = $this->beginTransaction();
if ($status != 0) {
return -1;
}
}
// Create the new schema
$status = $this->execute($sql);
if ($status != 0) {
$this->rollbackTransaction();
return -1;
}
// Set the comment
if ($comment != '') {
$status = $this->setComment('SCHEMA', $schemaname, '', $comment);
if ($status != 0) {
$this->rollbackTransaction();
return -1;
}
return $this->endTransaction();
}
return 0;
}
/**
* Updates a schema.
*
* @param string $schemaname The name of the schema to drop
* @param string $comment The new comment for this schema
* @param string $name new name for this schema
* @param string $owner The new owner for this schema
*
* @return bool|int 0 success
*/
public function updateSchema($schemaname, $comment, $name, $owner)
{
$this->fieldClean($schemaname);
$this->fieldClean($name);
$this->fieldClean($owner);
$status = $this->beginTransaction();
if ($status != 0) {
$this->rollbackTransaction();
return -1;
}
$status = $this->setComment('SCHEMA', $schemaname, '', $comment);
if ($status != 0) {
$this->rollbackTransaction();
return -1;
}
$schema_rs = $this->getSchemaByName($schemaname);
/* Only if the owner change */
if ($schema_rs->fields['ownername'] != $owner) {
$sql = "ALTER SCHEMA \"{$schemaname}\" OWNER TO \"{$owner}\"";
$status = $this->execute($sql);
if ($status != 0) {
$this->rollbackTransaction();
return -1;
}
}
// Only if the name has changed
if ($name != $schemaname) {
$sql = "ALTER SCHEMA \"{$schemaname}\" RENAME TO \"{$name}\"";
$status = $this->execute($sql);
if ($status != 0) {
$this->rollbackTransaction();
return -1;
}
}
return $this->endTransaction();
}
/**
* Return all information relating to a schema.
*
* @param string $schema The name of the schema
*
* @return \PHPPgAdmin\ADORecordSet Schema information
*/
public function getSchemaByName($schema)
{
$this->clean($schema);
$sql = "
SELECT nspname, nspowner, r.rolname AS ownername, nspacl,
pg_catalog.obj_description(pn.oid, 'pg_namespace') as nspcomment
FROM pg_catalog.pg_namespace pn
LEFT JOIN pg_roles as r ON pn.nspowner = r.oid
WHERE nspname='{$schema}'";
return $this->selectSet($sql);
}
// Table functions
/**
* Drops a schema.
*
* @param string $schemaname The name of the schema to drop
* @param bool $cascade True to cascade drop, false to restrict
*
* @return int 0 if operation was successful
*/
public function dropSchema($schemaname, $cascade)
{
$this->fieldClean($schemaname);
$sql = "DROP SCHEMA \"{$schemaname}\"";
if ($cascade) {
$sql .= ' CASCADE';
}
return $this->execute($sql);
}
abstract public function fieldClean(&$str);
abstract public function beginTransaction();
abstract public function rollbackTransaction();
abstract public function endTransaction();
abstract public function execute($sql);
abstract public function setComment($obj_type, $obj_name, $table, $comment, $basetype = null);
abstract public function selectSet($sql);
abstract public function clean(&$str);
abstract public function phpBool($parameter);
abstract public function hasCreateTableLikeWithConstraints();
abstract public function hasCreateTableLikeWithIndexes();
abstract public function hasTablespaces();
abstract public function delete($table, $conditions, $schema = '');
abstract public function fieldArrayClean(&$arr);
abstract public function hasCreateFieldWithConstraints();
abstract public function getAttributeNames($table, $atts);
abstract public function selectField($sql, $field);
abstract public function phpArray($dbarr);
}
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