oracle.php

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<?php
// @see DbPdo Padre de Drivers Pdo
require_once CORE_PATH . 'libs/db/adapters/pdo.php';

class DbPdoOracle extends DbPDO {

        protected $db_rbdm = "oci";

        const TYPE_INTEGER = "INTEGER";

        const TYPE_DATE = "DATE";

        const TYPE_VARCHAR = "VARCHAR2";

        const TYPE_DECIMAL = "DECIMAL";

        const TYPE_DATETIME = "DATETIME";

        const TYPE_CHAR = "CHAR";


        public function initialize(){
                $this->pdo->setAttribute(PDO::ATTR_AUTOCOMMIT, false);
                $this->exec("alter session set nls_date_format = 'YYYY-MM-DD'");
                $this->begin();
        }

        public function limit($sql, $number){
                if(!is_numeric($number)||$number<0){
                        return $sql;
                }
                if(eregi("ORDER[\t\n\r ]+BY", $sql)){
                        if(stripos($sql, "WHERE")){
                                return eregi_replace("ORDER[\t\n\r ]+BY", "AND ROWNUM <= $number ORDER BY", $sql);
                        } else {
                                return eregi_replace("ORDER[\t\n\r ]+BY", "WHERE ROWNUM <= $number ORDER BY", $sql);
                        }
                } else {
                        if(stripos($sql, "WHERE")){
                                return "$sql AND ROWNUM <= $number";
                        } else {
                                return "$sql WHERE ROWNUM <= $number";
                        }
                }
        }

        public function drop_table($table, $if_exists=true){
                if($if_exists){
                        if($this->table_exists($table)){
                                return $this->query("DROP TABLE $table");
                        } else {
                                return true;
                        }
                } else {
                        return $this->query("DROP TABLE $table");
                }
        }

        public function create_table($table, $definition, $index=array()){
                $create_sql = "CREATE TABLE $table (";
                if(!is_array($definition)){
                        new KumbiaException("Definici&oacute;n invalida para crear la tabla '$table'");
                        return false;
                }
                $create_lines = array();
                $index = array();
                $unique_index = array();
                $primary = array();
                $not_null = "";
                $size = "";
                foreach($definition as $field => $field_def){
                        if(isset($field_def['not_null'])){
                                $not_null = $field_def['not_null'] ? 'NOT NULL' : '';
                        } else {
                                $not_null = "";
                        }
                        if(isset($field_def['size'])){
                                $size = $field_def['size'] ? '('.$field_def['size'].')' : '';
                        } else {
                                $size = "";
                        }
                        if(isset($field_def['index'])){
                                if($field_def['index']){
                                        $index[] = "INDEX($field)";
                                }
                        }
                        if(isset($field_def['unique_index'])){
                                if($field_def['unique_index']){
                                        $index[] = "UNIQUE($field)";
                                }
                        }
                        if(isset($field_def['primary'])){
                                if($field_def['primary']){
                                        $primary[] = "$field";
                                }
                        }
                        if(isset($field_def['auto'])){
                                if($field_def['auto']){
                                        $this->query("CREATE SEQUENCE {$table}_{$field}_seq START WITH 1");
                                }
                        }
                        if(isset($field_def['extra'])){
                                $extra = $field_def['extra'];
                        } else {
                                $extra = "";
                        }
                        $create_lines[] = "$field ".$field_def['type'].$size.' '.$not_null.' '.$extra;
                }
                $create_sql.= join(',', $create_lines);
                $last_lines = array();
                if(count($primary)){
                        $last_lines[] = 'PRIMARY KEY('.join(",", $primary).')';
                }
                if(count($index)){
                        $last_lines[] = join(',', $index);
                }
                if(count($unique_index)){
                        $last_lines[] = join(',', $unique_index);
                }
                if(count($last_lines)){
                        $create_sql.= ','.join(',', $last_lines).')';
                }
                return $this->query($create_sql);

        }

        function list_tables(){
                return $this->fetch_all("SELECT table_name FROM all_tables");
        }

        public function last_insert_id($table='', $primary_key=''){
                if($table&&$primary_key){
                        $sequence = $table."_".$primary_key."_seq";
                        $value = $this->fetch_one("SELECT $sequence.CURRVAL FROM dual");
                        return $value[0];
                }
                return false;
        }

        function table_exists($table, $schema=''){
                $num = $this->fetch_one("SELECT COUNT(*) FROM ALL_TABLES WHERE TABLE_NAME = '".strtoupper($table)."'");
                return $num[0];
        }

        public function describe_table($table, $schema=''){
                $describe = $this->fetch_all("SELECT LOWER(ALL_TAB_COLUMNS.COLUMN_NAME) AS FIELD, LOWER(ALL_TAB_COLUMNS.DATA_TYPE) AS TYPE, ALL_TAB_COLUMNS.DATA_LENGTH AS LENGTH, (SELECT COUNT(*) FROM ALL_CONS_COLUMNS WHERE TABLE_NAME = '".strtoupper($table)."' AND ALL_CONS_COLUMNS.COLUMN_NAME = ALL_TAB_COLUMNS.COLUMN_NAME AND ALL_CONS_COLUMNS.POSITION IS NOT NULL) AS KEY, ALL_TAB_COLUMNS.NULLABLE AS ISNULL FROM ALL_TAB_COLUMNS WHERE ALL_TAB_COLUMNS.TABLE_NAME = '".strtoupper($table)."'");
                $final_describe = array();
                foreach($describe as $key => $value){
                        $final_describe[] = array(
                                "Field" => $value["field"],
                                "Type" => $value["type"],
                                "Null" => $value["isnull"] == "Y" ? "YES" : "NO",
                                "Key" => $value["key"] == 1 ? "PRI" : ""
                        );
                }
                return $final_describe;
        }

}