adodb-postgres7.inc.php

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<?php
/*
 @version   v5.20.3  01-Jan-2016
 @copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
 @copyright (c) 2014      Damien Regad, Mark Newnham and the ADOdb community
  Released under both BSD license and Lesser GPL library license.
  Whenever there is any discrepancy between the two licenses,
  the BSD license will take precedence.
  Set tabs to 4.

  Postgres7 support.
  28 Feb 2001: Currently indicate that we support LIMIT
  01 Dec 2001: dannym added support for default values
*/

// security - hide paths
if (!defined('ADODB_DIR')) die();

include_once(ADODB_DIR."/drivers/adodb-postgres64.inc.php");

class ADODB_postgres7 extends ADODB_postgres64 {
    var $databaseType = 'postgres7';
    var $hasLimit = true;   // set to true for pgsql 6.5+ only. support pgsql/mysql SELECT * FROM TABLE LIMIT 10
    var $ansiOuter = true;
    var $charSet = true; //set to true for Postgres 7 and above - PG client supports encodings

    // Richard 3/18/2012 - Modified SQL to return SERIAL type correctly AS old driver no longer return SERIAL as data type.
    var $metaColumnsSQL = "
        SELECT
            a.attname,
            CASE
                WHEN x.sequence_name != ''
                THEN 'SERIAL'
                ELSE t.typname
            END AS typname,
            a.attlen, a.atttypmod, a.attnotnull, a.atthasdef, a.attnum
        FROM
            pg_class c,
            pg_attribute a
        JOIN pg_type t ON a.atttypid = t.oid
        LEFT JOIN (
            SELECT
                c.relname as sequence_name,
                c1.relname as related_table,
                a.attname as related_column
            FROM pg_class c
            JOIN pg_depend d ON d.objid = c.oid
            LEFT JOIN pg_class c1 ON d.refobjid = c1.oid
            LEFT JOIN pg_attribute a ON (d.refobjid, d.refobjsubid) = (a.attrelid, a.attnum)
            WHERE c.relkind = 'S' AND c1.relname = '%s'
        ) x ON x.related_column= a.attname
        WHERE
            c.relkind in ('r','v')
            AND (c.relname='%s' or c.relname = lower('%s'))
            AND a.attname not like '....%%'
            AND a.attnum > 0
            AND a.attrelid = c.oid
        ORDER BY
            a.attnum";

    // used when schema defined
    var $metaColumnsSQL1 = "
        SELECT
            a.attname,
            CASE
                WHEN x.sequence_name != ''
                THEN 'SERIAL'
                ELSE t.typname
            END AS typname,
            a.attlen, a.atttypmod, a.attnotnull, a.atthasdef, a.attnum
        FROM
            pg_class c,
            pg_namespace n,
            pg_attribute a
        JOIN pg_type t ON a.atttypid = t.oid
        LEFT JOIN (
            SELECT
                c.relname as sequence_name,
                c1.relname as related_table,
                a.attname as related_column
            FROM pg_class c
            JOIN pg_depend d ON d.objid = c.oid
            LEFT JOIN pg_class c1 ON d.refobjid = c1.oid
            LEFT JOIN pg_attribute a ON (d.refobjid, d.refobjsubid) = (a.attrelid, a.attnum)
            WHERE c.relkind = 'S' AND c1.relname = '%s'
        ) x ON x.related_column= a.attname
        WHERE
            c.relkind in ('r','v')
            AND (c.relname='%s' or c.relname = lower('%s'))
            AND c.relnamespace=n.oid and n.nspname='%s'
            AND a.attname not like '....%%'
            AND a.attnum > 0
            AND a.atttypid = t.oid
            AND a.attrelid = c.oid
        ORDER BY a.attnum";


    function __construct()
    {
        parent::__construct();
        if (ADODB_ASSOC_CASE !== ADODB_ASSOC_CASE_NATIVE) {
            $this->rsPrefix .= 'assoc_';
        }
        $this->_bindInputArray = PHP_VERSION >= 5.1;
    }


    // the following should be compat with postgresql 7.2,
    // which makes obsolete the LIMIT limit,offset syntax
    function SelectLimit($sql,$nrows=-1,$offset=-1,$inputarr=false,$secs2cache=0)
    {
        $offsetStr = ($offset >= 0) ? " OFFSET ".((integer)$offset) : '';
        $limitStr  = ($nrows >= 0)  ? " LIMIT ".((integer)$nrows) : '';
        if ($secs2cache)
            $rs = $this->CacheExecute($secs2cache,$sql."$limitStr$offsetStr",$inputarr);
        else
            $rs = $this->Execute($sql."$limitStr$offsetStr",$inputarr);

        return $rs;
    }

    /*
    function Prepare($sql)
    {
        $info = $this->ServerInfo();
        if ($info['version']>=7.3) {
            return array($sql,false);
        }
        return $sql;
    }
    */

    protected function _generateMetaColumnsSQL($table, $schema)
    {
        if ($schema) {
            return sprintf($this->metaColumnsSQL1, $table, $table, $table, $schema);
        }
        else {
            return sprintf($this->metaColumnsSQL, $table, $table, $schema);
        }
    }

    function MetaForeignKeys($table, $owner=false, $upper=false)
    {
        # Regex isolates the 2 terms between parenthesis using subexpressions
        $regex = '^.*\((.*)\).*\((.*)\).*$';
        $sql="
            SELECT
                lookup_table,
                regexp_replace(consrc, '$regex', '\\2') AS lookup_field,
                dep_table,
                regexp_replace(consrc, '$regex', '\\1') AS dep_field
            FROM (
                SELECT
                    pg_get_constraintdef(c.oid) AS consrc,
                    t.relname AS dep_table,
                    ft.relname AS lookup_table
                FROM pg_constraint c
                JOIN pg_class t ON (t.oid = c.conrelid)
                JOIN pg_class ft ON (ft.oid = c.confrelid)
                JOIN pg_namespace nft ON (nft.oid = ft.relnamespace)
                LEFT JOIN pg_description ds ON (ds.objoid = c.oid)
                JOIN pg_namespace n ON (n.oid = t.relnamespace)
                WHERE c.contype = 'f'::\"char\"
                ORDER BY t.relname, n.nspname, c.conname, c.oid
                ) constraints
            WHERE
                dep_table='".strtolower($table)."'
            ORDER BY
                lookup_table,
                dep_table,
                dep_field";
        $rs = $this->Execute($sql);

        if (!$rs || $rs->EOF) return false;

        $a = array();
        while (!$rs->EOF) {
            if ($upper) {
                $a[strtoupper($rs->Fields('lookup_table'))][] = strtoupper(str_replace('"','',$rs->Fields('dep_field').'='.$rs->Fields('lookup_field')));
            } else {
                $a[$rs->Fields('lookup_table')][] = str_replace('"','',$rs->Fields('dep_field').'='.$rs->Fields('lookup_field'));
            }
            $rs->MoveNext();
        }

        return $a;

    }

    // from  Edward Jaramilla, improved version - works on pg 7.4
    function _old_MetaForeignKeys($table, $owner=false, $upper=false)
    {
        $sql = 'SELECT t.tgargs as args
        FROM
        pg_trigger t,pg_class c,pg_proc p
        WHERE
        t.tgenabled AND
        t.tgrelid = c.oid AND
        t.tgfoid = p.oid AND
        p.proname = \'RI_FKey_check_ins\' AND
        c.relname = \''.strtolower($table).'\'
        ORDER BY
            t.tgrelid';

        $rs = $this->Execute($sql);

        if (!$rs || $rs->EOF) return false;

        $arr = $rs->GetArray();
        $a = array();
        foreach($arr as $v) {
            $data = explode(chr(0), $v['args']);
            $size = count($data)-1; //-1 because the last node is empty
            for($i = 4; $i < $size; $i++) {
                if ($upper)
                    $a[strtoupper($data[2])][] = strtoupper($data[$i].'='.$data[++$i]);
                else
                    $a[$data[2]][] = $data[$i].'='.$data[++$i];
            }
        }
        return $a;
    }

    function _query($sql,$inputarr=false)
    {
        if (! $this->_bindInputArray) {
            // We don't have native support for parameterized queries, so let's emulate it at the parent
            return ADODB_postgres64::_query($sql, $inputarr);
        }

        $this->_pnum = 0;
        $this->_errorMsg = false;
        // -- added Cristiano da Cunha Duarte
        if ($inputarr) {
            $sqlarr = explode('?',trim($sql));
            $sql = '';
            $i = 1;
            $last = sizeof($sqlarr)-1;
            foreach($sqlarr as $v) {
                if ($last < $i) $sql .= $v;
                else $sql .= $v.' $'.$i;
                $i++;
            }

            $rez = pg_query_params($this->_connectionID,$sql, $inputarr);
        } else {
            $rez = pg_query($this->_connectionID,$sql);
        }
        // check if no data returned, then no need to create real recordset
        if ($rez && pg_num_fields($rez) <= 0) {
            if (is_resource($this->_resultid) && get_resource_type($this->_resultid) === 'pgsql result') {
                pg_free_result($this->_resultid);
            }
            $this->_resultid = $rez;
            return true;
        }
        return $rez;
    }

    // this is a set of functions for managing client encoding - very important if the encodings
    // of your database and your output target (i.e. HTML) don't match
    //for instance, you may have UNICODE database and server it on-site as WIN1251 etc.
    // GetCharSet - get the name of the character set the client is using now
    // the functions should work with Postgres 7.0 and above, the set of charsets supported
    // depends on compile flags of postgres distribution - if no charsets were compiled into the server
    // it will return 'SQL_ANSI' always
    function GetCharSet()
    {
        //we will use ADO's builtin property charSet
        $this->charSet = @pg_client_encoding($this->_connectionID);
        if (!$this->charSet) {
            return false;
        } else {
            return $this->charSet;
        }
    }

    // SetCharSet - switch the client encoding
    function SetCharSet($charset_name)
    {
        $this->GetCharSet();
        if ($this->charSet !== $charset_name) {
            $if = pg_set_client_encoding($this->_connectionID, $charset_name);
            if ($if == "0" & $this->GetCharSet() == $charset_name) {
                return true;
            } else return false;
        } else return true;
    }

}

/*--------------------------------------------------------------------------------------
    Class Name: Recordset
--------------------------------------------------------------------------------------*/

class ADORecordSet_postgres7 extends ADORecordSet_postgres64{

    var $databaseType = "postgres7";


    function __construct($queryID, $mode=false)
    {
        parent::__construct($queryID, $mode);
    }

    // 10% speedup to move MoveNext to child class
    function MoveNext()
    {
        if (!$this->EOF) {
            $this->_currentRow++;
            if ($this->_numOfRows < 0 || $this->_numOfRows > $this->_currentRow) {
                $this->fields = @pg_fetch_array($this->_queryID,$this->_currentRow,$this->fetchMode);

                if (is_array($this->fields)) {
                    if ($this->fields && isset($this->_blobArr)) $this->_fixblobs();
                    return true;
                }
            }
            $this->fields = false;
            $this->EOF = true;
        }
        return false;
    }

}

class ADORecordSet_assoc_postgres7 extends ADORecordSet_postgres64{

    var $databaseType = "postgres7";


    function __construct($queryID, $mode=false)
    {
        parent::__construct($queryID, $mode);
    }

    function _fetch()
    {
        if ($this->_currentRow >= $this->_numOfRows && $this->_numOfRows >= 0) {
            return false;
        }

        $this->fields = @pg_fetch_array($this->_queryID,$this->_currentRow,$this->fetchMode);

        if ($this->fields) {
            if (isset($this->_blobArr)) $this->_fixblobs();
            $this->_updatefields();
        }

        return (is_array($this->fields));
    }

    function MoveNext()
    {
        if (!$this->EOF) {
            $this->_currentRow++;
            if ($this->_numOfRows < 0 || $this->_numOfRows > $this->_currentRow) {
                $this->fields = @pg_fetch_array($this->_queryID,$this->_currentRow,$this->fetchMode);

                if (is_array($this->fields)) {
                    if ($this->fields) {
                        if (isset($this->_blobArr)) $this->_fixblobs();

                        $this->_updatefields();
                    }
                    return true;
                }
            }


            $this->fields = false;
            $this->EOF = true;
        }
        return false;
    }
}