--- /dev/null
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.1.6 or newer
+ *
+ * @package CodeIgniter
+ * @author ExpressionEngine Dev Team
+ * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
+ * @license http://codeigniter.com/user_guide/license.html
+ * @link http://codeigniter.com
+ * @since Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Postgre Forge Class
+ *
+ * @category Database
+ * @author ExpressionEngine Dev Team
+ * @link http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_postgre_forge extends CI_DB_forge {
+
+ /**
+ * Create database
+ *
+ * @access private
+ * @param string the database name
+ * @return bool
+ */
+ function _create_database($name)
+ {
+ return "CREATE DATABASE ".$name;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Drop database
+ *
+ * @access private
+ * @param string the database name
+ * @return bool
+ */
+ function _drop_database($name)
+ {
+ return "DROP DATABASE ".$name;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Create Table
+ *
+ * @access private
+ * @param string the table name
+ * @param array the fields
+ * @param mixed primary key(s)
+ * @param mixed key(s)
+ * @param boolean should 'IF NOT EXISTS' be added to the SQL
+ * @return bool
+ */
+ function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
+ {
+ $sql = 'CREATE TABLE ';
+
+ if ($if_not_exists === TRUE)
+ {
+ if ($this->db->table_exists($table))
+ {
+ return "SELECT * FROM $table"; // Needs to return innocous but valid SQL statement
+ }
+ }
+
+ $sql .= $this->db->_escape_identifiers($table)." (";
+ $current_field_count = 0;
+
+ foreach ($fields as $field=>$attributes)
+ {
+ // Numeric field names aren't allowed in databases, so if the key is
+ // numeric, we know it was assigned by PHP and the developer manually
+ // entered the field information, so we'll simply add it to the list
+ if (is_numeric($field))
+ {
+ $sql .= "\n\t$attributes";
+ }
+ else
+ {
+ $attributes = array_change_key_case($attributes, CASE_UPPER);
+
+ $sql .= "\n\t".$this->db->_protect_identifiers($field);
+
+ $is_unsigned = (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE);
+
+ // Convert datatypes to be PostgreSQL-compatible
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'TINYINT':
+ $attributes['TYPE'] = 'SMALLINT';
+ break;
+ case 'SMALLINT':
+ $attributes['TYPE'] = ($is_unsigned) ? 'INTEGER' : 'SMALLINT';
+ break;
+ case 'MEDIUMINT':
+ $attributes['TYPE'] = 'INTEGER';
+ break;
+ case 'INT':
+ $attributes['TYPE'] = ($is_unsigned) ? 'BIGINT' : 'INTEGER';
+ break;
+ case 'BIGINT':
+ $attributes['TYPE'] = ($is_unsigned) ? 'NUMERIC' : 'BIGINT';
+ break;
+ case 'DOUBLE':
+ $attributes['TYPE'] = 'DOUBLE PRECISION';
+ break;
+ case 'DATETIME':
+ $attributes['TYPE'] = 'TIMESTAMP';
+ break;
+ case 'LONGTEXT':
+ $attributes['TYPE'] = 'TEXT';
+ break;
+ case 'BLOB':
+ $attributes['TYPE'] = 'BYTEA';
+ break;
+ }
+
+ // If this is an auto-incrementing primary key, use the serial data type instead
+ if (in_array($field, $primary_keys) && array_key_exists('AUTO_INCREMENT', $attributes)
+ && $attributes['AUTO_INCREMENT'] === TRUE)
+ {
+ $sql .= ' SERIAL';
+ }
+ else
+ {
+ $sql .= ' '.$attributes['TYPE'];
+ }
+
+ // Modified to prevent constraints with integer data types
+ if (array_key_exists('CONSTRAINT', $attributes) && strpos($attributes['TYPE'], 'INT') === false)
+ {
+ $sql .= '('.$attributes['CONSTRAINT'].')';
+ }
+
+ if (array_key_exists('DEFAULT', $attributes))
+ {
+ $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
+ }
+
+ if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
+ {
+ $sql .= ' NULL';
+ }
+ else
+ {
+ $sql .= ' NOT NULL';
+ }
+
+ // Added new attribute to create unqite fields. Also works with MySQL
+ if (array_key_exists('UNIQUE', $attributes) && $attributes['UNIQUE'] === TRUE)
+ {
+ $sql .= ' UNIQUE';
+ }
+ }
+
+ // don't add a comma on the end of the last field
+ if (++$current_field_count < count($fields))
+ {
+ $sql .= ',';
+ }
+ }
+
+ if (count($primary_keys) > 0)
+ {
+ // Something seems to break when passing an array to _protect_identifiers()
+ foreach ($primary_keys as $index => $key)
+ {
+ $primary_keys[$index] = $this->db->_protect_identifiers($key);
+ }
+
+ $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";
+ }
+
+ $sql .= "\n);";
+
+ if (is_array($keys) && count($keys) > 0)
+ {
+ foreach ($keys as $key)
+ {
+ if (is_array($key))
+ {
+ $key = $this->db->_protect_identifiers($key);
+ }
+ else
+ {
+ $key = array($this->db->_protect_identifiers($key));
+ }
+
+ foreach ($key as $field)
+ {
+ $sql .= "CREATE INDEX " . $table . "_" . str_replace(array('"', "'"), '', $field) . "_index ON $table ($field); ";
+ }
+ }
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Drop Table
+ *
+ * @access private
+ * @return bool
+ */
+ function _drop_table($table)
+ {
+ return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table)." CASCADE";
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Alter table query
+ *
+ * Generates a platform-specific query so that a table can be altered
+ * Called by add_column(), drop_column(), and column_alter(),
+ *
+ * @access private
+ * @param string the ALTER type (ADD, DROP, CHANGE)
+ * @param string the column name
+ * @param string the table name
+ * @param string the column definition
+ * @param string the default value
+ * @param boolean should 'NOT NULL' be added
+ * @param string the field after which we should add the new field
+ * @return object
+ */
+ function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
+ {
+ $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name);
+
+ // DROP has everything it needs now.
+ if ($alter_type == 'DROP')
+ {
+ return $sql;
+ }
+
+ $sql .= " $column_definition";
+
+ if ($default_value != '')
+ {
+ $sql .= " DEFAULT \"$default_value\"";
+ }
+
+ if ($null === NULL)
+ {
+ $sql .= ' NULL';
+ }
+ else
+ {
+ $sql .= ' NOT NULL';
+ }
+
+ if ($after_field != '')
+ {
+ $sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field);
+ }
+
+ return $sql;
+
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Rename a table
+ *
+ * Generates a platform-specific query so that a table can be renamed
+ *
+ * @access private
+ * @param string the old table name
+ * @param string the new table name
+ * @return string
+ */
+ function _rename_table($table_name, $new_table_name)
+ {
+ $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name);
+ return $sql;
+ }
+
+
+}
+
+/* End of file postgre_forge.php */
+/* Location: ./system/database/drivers/postgre/postgre_forge.php */
\ No newline at end of file
projects / living-lab-site.git / blobdiff