informix.php

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

class DbPdoInformix extends DbPDO  {

        protected $db_rbdm = "informix";

        const TYPE_INTEGER = "INTEGER";

        const TYPE_DATE = "DATE";

        const TYPE_VARCHAR = "VARCHAR";

        const TYPE_DECIMAL = "DECIMAL";

        const TYPE_DATETIME = "DATETIME";

        const TYPE_CHAR = "CHAR";

        public function initialize(){

        }

        public function table_exists($table, $schema=''){
                $table = addslashes("$table");
                $num = $this->fetch_one("SELECT COUNT(*) FROM systables WHERE tabname = '$table'");
                return (int) $num[0];
        }

        public function limit($sql, $number){
                $number = (int) $number;
                $this->limit = $number;
                return "$sql -- LIMIT $number\n";
        }

        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 {
                        $this->set_return_rows(false);
                        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']){
                                        $field_def['type'] = "SERIAL";
                                }
                        }
                        if(isset($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);

        }

        public function list_tables(){
                return $this->fetch_all("SELECT tabname FROM systables WHERE tabtype = 'T' AND version <> 65537");
        }

        public function describe_table($table, $schema=''){
                $describe = $this->fetch_all("SELECT c.colname AS Field, c.coltype AS Type,
                                'YES' AS NULL, c.collength as Length
                                 FROM systables t, syscolumns c WHERE
                                c.tabid = t.tabid AND t.tabname = '$table' ORDER BY c.colno");
                $final_describe = array();
                foreach($describe as $field){
                        //Serial
                        if($field['field']=='id'){
                                $field["key"] = 'PRI';
                                $field["null"] = 'NO';
                        } else {
                                $field["key"] = '';
                        }
                        if(substr($field['field'], -3)=='_id'){
                                $field["null"] = 'NO';
                        }
                        if($field['type']==262){
                                $field['type'] = "integer";
                        }
                        if($field['type']==13){
                                $field['type'] = "varchar(".$field['length'].")";
                        }
                        if($field['type']==2){
                                $field['type'] = "int(".$field['length'].")";
                        }
                        if($field['type']==7){
                                $field['type'] = "date";
                        }
                        $final_describe[] = array(
                                "Field" => $field["field"],
                                "Type" => $field["type"],
                                "Null" => $field["null"],
                                "Key" => $field["key"]
                        );
                }
                return $final_describe;
        }

}