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OpenSQLManager/sys/db/drivers/sqlite/sqlite_sql.php

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<?php
/**
* OpenSQLManager
*
* Free Database manager for Open Source Databases
*
* @author Timothy J. Warren
* @copyright Copyright (c) 2012
* @link https://github.com/aviat4ion/OpenSQLManager
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* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
/**
* SQLite Specific SQL
*/
class SQLite_SQL extends DB_SQL {
/**
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* Convenience public function to create a new table
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*
* @param string $name //Name of the table
* @param array $columns //columns as straight array and/or column => type pairs
* @param array $constraints // column => constraint pairs
* @param array $indexes // column => index pairs
* @return string
*/
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public function create_table($name, $columns, array $constraints=array(), array $indexes=array())
{
$column_array = array();
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// Reorganize into an array indexed with column information
// Eg $column_array[$colname] = array(
// 'type' => ...,
// 'constraint' => ...,
// 'index' => ...,
// )
foreach($columns as $colname => $type)
{
if(is_numeric($colname))
{
$colname = $type;
}
$column_array[$colname] = array();
$column_array[$colname]['type'] = ($type !== $colname) ? $type : '';
}
if( ! empty($constraints))
{
foreach($constraints as $col => $const)
{
$column_array[$col]['constraint'] = $const;
}
}
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// Join column definitons together
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$columns = array();
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foreach($column_array as $n => $props)
{
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$str = "{$n} ";
$str .= (isset($props['type'])) ? "{$props['type']} " : "";
$str .= (isset($props['constraint'])) ? $props['constraint'] : "";
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$columns[] = $str;
}
// Generate the sql for the creation of the table
$sql = "CREATE TABLE IF NOT EXISTS \"{$name}\" (";
$sql .= implode(", ", $columns);
$sql .= ")";
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return $sql;
}
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// --------------------------------------------------------------------------
/**
* SQL to drop the specified table
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*
* @param string $name
* @return string
*/
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public function delete_table($name)
{
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return 'DROP TABLE IF EXISTS "'.$name.'"';
}
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// --------------------------------------------------------------------------
/**
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* Limit clause
*
* @param string $sql
* @param int $limit
* @param int $offset
* @return string
*/
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public function limit($sql, $limit, $offset=FALSE)
{
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if ( ! is_numeric($offset))
{
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return $sql." LIMIT {$limit}";
}
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return $sql." LIMIT {$offset}, {$limit}";
}
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// --------------------------------------------------------------------------
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/**
* Random ordering keyword
*
* @return string
*/
public function random()
{
return ' RANDOM()';
}
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// --------------------------------------------------------------------------
/**
* Create an SQL backup file for the current database's data
*
* @param array $excluded
* @return string
*/
public function backup_data($excluded=array())
{
// Get a list of all the objects
$sql = 'SELECT "name" FROM "sqlite_master"';
if( ! empty($excluded))
{
$sql .= ' WHERE NOT IN("'.implode('","', $excluded).'")';
}
$res = $this->query($sql);
$result = $res->fetchAll(PDO::FETCH_ASSOC);
unset($res);
$output_sql = '';
// Get the data for each object
foreach($result as $r)
{
$sql = 'SELECT * FROM "'.$r['name'].'"';
$res = $this->query($sql);
$obj_res = $res->fetchAll(PDO::FETCH_ASSOC);
unset($res);
// Nab the column names by getting the keys of the first row
$columns = array_keys($obj_res[0]);
$insert_rows = array();
// Create the insert statements
foreach($obj_res as $row)
{
$row = array_values($row);
// Quote values as needed by type
for($i=0, $icount=count($row); $i<$icount; $i++)
{
$row[$i] = (is_numeric($row[$i])) ? $row[$i] : $this->quote($row[$i]);
}
$row_string = 'INSERT INTO "'.$r['name'].'" ("'.implode('","', $columns).'") VALUES ('.implode(',', $row).');';
unset($row);
$insert_rows[] = $row_string;
}
unset($obj_res);
$output_sql .= "\n\n".implode("\n", $insert_rows);
}
return $output_sql;
}
// --------------------------------------------------------------------------
/**
* Create an SQL backup file for the current database's structure
*
* @return string
*/
public function backup_structure()
{
// Fairly easy for SQLite...just query the master table
$sql = 'SELECT "sql" FROM "sqlite_master"';
$res = $this->query($sql);
$result = $res->fetchAll(PDO::FETCH_ASSOC);
$sql_array = array();
foreach($result as $r)
{
$sql_array[] = $r['sql'];
}
$sql_structure = implode("\n\n", $sql_array);
return $sql_structure;
}
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// --------------------------------------------------------------------------
/**
* Returns sql to list other databases
*
* @return FALSE
*/
public function db_list()
{
return FALSE;
}
// --------------------------------------------------------------------------
/**
* Returns sql to list tables
*
* @return string
*/
public function table_list()
{
return <<<SQL
SELECT "name"
FROM "sqlite_master"
WHERE "type"='table'
ORDER BY "name" DESC
SQL;
}
// --------------------------------------------------------------------------
/**
* Overridden in SQLite class
*
* @return string
*/
public function system_table_list()
{
return FALSE;
}
// --------------------------------------------------------------------------
/**
* Returns sql to list views
*
* @return string
*/
public function view_list()
{
return <<<SQL
SELECT "name" FROM "sqlite_master" WHERE "type" = 'view'
SQL;
}
// --------------------------------------------------------------------------
/**
* Returns sql to list triggers
*
* @return string
*/
public function trigger_list()
{
return <<<SQL
SELECT *
FROM "information_schema"."triggers"
WHERE "trigger_schema" NOT IN
('pg_catalog', 'information_schema')
SQL;
}
// --------------------------------------------------------------------------
/**
* Return sql to list functions
*
* @return FALSE
*/
public function function_list()
{
return FALSE;
}
// --------------------------------------------------------------------------
/**
* Return sql to list stored procedures
*
* @return FALSE
*/
public function procedure_list()
{
return FALSE;
}
// --------------------------------------------------------------------------
/**
* Return sql to list sequences
*
* @return FALSE
*/
public function sequence_list()
{
return FALSE;
}
}
//End of sqlite_sql.php