db_details_qbe.php

WEBGAME源码,有架设说明,只是非常简单

    foreach ($Field AS $value) {
        $parts             = explode('.', $value);
        if (!empty($parts[0]) && !empty($parts[1])) {
            $tab_raw       = urldecode($parts[0]);
            $tab           = str_replace('`', '', $tab_raw);
            $tab_all[$tab] = $tab;

            $col_raw       = urldecode($parts[1]);
            $col_all[]     = $tab . '.' . str_replace('`', '', $col_raw);
         }
    } // end while

    // Check 'where' clauses
    if ($cfgRelation['relwork'] && count($tab_all) > 0) {
        // Now we need all tables that we have in the where clause
        $crit_cnt         = count($criteria);
        for ($x = 0; $x < $crit_cnt; $x++) {
            $curr_tab     = explode('.', urldecode($Field[$x]));
            if (!empty($curr_tab[0]) && !empty($curr_tab[1])) {
                $tab_raw  = urldecode($curr_tab[0]);
                $tab      = str_replace('`', '', $tab_raw);

                $col_raw  = urldecode($curr_tab[1]);
                $col1     = str_replace('`', '', $col_raw);
                $col1     = $tab . '.' . $col1;
                // Now we know that our array has the same numbers as $criteria
                // we can check which of our columns has a where clause
                if (!empty($criteria[$x])) {
                    if (substr($criteria[$x], 0, 1) == '=' || stristr($criteria[$x], 'is')) {
                        $col_where[$col] = $col1;
                        $tab_wher[$tab]  = $tab;
                    }
                } // end if
            } // end if
        } // end for

        // Cleans temp vars w/o further use
        unset($tab_raw);
        unset($col_raw);
        unset($col1);

        if (count($tab_wher) == 1) {
            // If there is exactly one column that has a decent where-clause
            // we will just use this
            $master = key($tab_wher);
        } else {
            // Now let's find out which of the tables has an index
            // ( When the control user is the same as the normal user
            // because he is using one of his databases as pmadb,
            // the last db selected is not always the one where we need to work)
            PMA_DBI_select_db($db);

            foreach ($tab_all AS $tab) {
                $ind_rs   = PMA_DBI_query('SHOW INDEX FROM ' . PMA_backquote($tab) . ';');
                while ($ind = PMA_DBI_fetch_assoc($ind_rs)) {
                    $col1 = $tab . '.' . $ind['Column_name'];
                    if (isset($col_all[$col1])) {
                        if ($ind['non_unique'] == 0) {
                            if (isset($col_where[$col1])) {
                                $col_unique[$col1] = 'Y';
                            } else {
                                $col_unique[$col1] = 'N';
                            }
                        } else {
                            if (isset($col_where[$col1])) {
                                $col_index[$col1] = 'Y';
                            } else {
                                $col_index[$col1] = 'N';
                            }
                        }
                    }
                } // end while (each col of tab)
            } // end while (each tab)
            // now we want to find the best.
            if (isset($col_unique) && count($col_unique) > 0) {
                $col_cand = $col_unique;
                $needsort = 1;
            } elseif (isset($col_index) && count($col_index) > 0) {
                $col_cand = $col_index;
                $needsort = 1;
            } elseif (isset($col_where) && count($col_where) > 0) {
                $col_cand = $tab_wher;
                $needsort = 0;
            } else {
                $col_cand = $tab_all;
                $needsort = 0;
            }

            // If we came up with $col_unique (very good) or $col_index (still
            // good) as $col_cand we want to check if we have any 'Y' there
            // (that would mean that they were also found in the whereclauses
            // which would be great). if yes, we take only those
            if ($needsort == 1) {
                foreach ($col_cand AS $col => $is_where) {
                    $tab           = explode('.', $col);
                    $tab           = $tab[0];
                    if ($is_where == 'Y') {
                        $vg[$col]  = $tab;
                    } else {
                        $sg[$col]  = $tab;
                    }
                }
                if (isset($vg)) {
                    $col_cand      = $vg;
                    // Candidates restricted in index+where
                } else {
                    $col_cand      = $sg;
                    // None of the candidates where in a where-clause
                }
            }

            // If our array of candidates has more than one member we'll just
            // find the smallest table.
            // Of course the actual query would be faster if we check for
            // the Criteria which gives the smallest result set in its table,
            // but it would take too much time to check this
            if (count($col_cand) > 1) {
                // Of course we only want to check each table once
                $checked_tables = $col_cand;
                foreach ($col_cand AS $tab) {
                    if ($checked_tables[$tab] != 1 ) {
                        $tsize[$tab] = PMA_Table::countRecords($db, $tab, true, false);
                        $checked_tables[$tab] = 1;
                    }
                    $csize[$tab] = $tsize[$tab];
                }
                asort($csize);
                reset($csize);
                $master = key($csize); // Smallest
            } else {
                reset($col_cand);
                $master = current($col_cand); // Only one single candidate
            }
        } // end if (exactly one where clause)

        /**
         * Removes unwanted entries from an array (PHP3 compliant)
         *
         * @param   array  the array to work with
         * @param   array  the list of keys to remove
         *
         * @return  array  the cleaned up array
         *
         * @access  private
         */
        function PMA_arrayShort($array, $key)
        {
            foreach ($array AS $k => $v) {
                if ($k != $key) {
                    $reta[$k] = $v;
                }
            }
            if (!isset($reta)) {
                $reta = array();
            }

            return $reta;
        } // end of the "PMA_arrayShort()" function


        /**
         * Finds all related tables
         *
         * @param   string   wether to go from master to foreign or vice versa
         *
         * @return  boolean  always TRUE
         *
         * @global  array    the list of tables that we still couldn't connect
         * @global  array    the list of allready connected tables
         * @global  string   the current databse name
         * @global  string   the super user connection id
         * @global  array    the list of relation settings
         *
         * @access  private
         */
        function PMA_getRelatives($from) {
            global $tab_left, $tab_know, $fromclause;
            global $controllink, $db, $cfgRelation;

            if ($from == 'master') {
                $to    = 'foreign';
            } else {
                $to    = 'master';
            }
            $in_know = '(\'' . implode('\', \'', $tab_know) . '\')';
            $in_left = '(\'' . implode('\', \'', $tab_left) . '\')';

            $rel_query = 'SELECT *'
                       . ' FROM ' . PMA_backquote($cfgRelation['relation'])
                       . ' WHERE ' . $from . '_db   = \'' . PMA_sqlAddslashes($db) . '\''
                       . ' AND ' . $to   . '_db   = \'' . PMA_sqlAddslashes($db) . '\''
                       . ' AND ' . $from . '_table IN ' . $in_know
                       . ' AND ' . $to   . '_table IN ' . $in_left;
            PMA_DBI_select_db($cfgRelation['db'], $controllink);
            $relations = @PMA_DBI_query($rel_query, $controllink);
            PMA_DBI_select_db($db, $controllink);
            while ($row = PMA_DBI_fetch_assoc($relations)) {
                $found_table                = $row[$to . '_table'];
                if (isset($tab_left[$found_table])) {
                    $fromclause             .= "\n" . ' LEFT JOIN '
                                            . PMA_backquote($row[$to . '_table']) . ' ON '
                                            . PMA_backquote($row[$from . '_table']) . '.'
                                            . PMA_backquote($row[$from . '_field']) . ' = '
                                            . PMA_backquote($row[$to . '_table']) . '.'
                                            . PMA_backquote($row[$to . '_field']) . ' ';
                    $tab_know[$found_table] = $found_table;
                    $tab_left               = PMA_arrayShort($tab_left, $found_table);
                }
            } // end while

            return TRUE;
        } // end of the "PMA_getRelatives()" function


        $tab_left          = PMA_arrayShort($tab_all, $master);
        $tab_know[$master] = $master;

        $run   = 0;
        $emerg = '';
        while (count($tab_left) > 0) {
            if ($run % 2 == 0) {
                PMA_getRelatives('master');
            } else {
                PMA_getRelatives('foreign');
            }
            $run++;
            if ($run > 5) {

                foreach ($tab_left AS $tab) {
                    $emerg    .= ', ' . PMA_backquote($tab);
                    $tab_left = PMA_arrayShort($tab_left, $tab);
                }
            }
        } // end while
        $qry_from = PMA_backquote($master) . $emerg . $fromclause;
    } // end if ($cfgRelation['relwork'] && count($tab_all) > 0)

} // end count($Field) > 0

// In case relations are not defined, just generate the FROM clause
// from the list of tables, however we don't generate any JOIN

if (empty($qry_from) && isset($tab_all)) {
    $qry_from = implode(', ', $tab_all);
}
// Now let's see what we got
if (!empty($qry_from)) {
    $encoded_qry  .= urlencode('FROM ' . $qry_from . "\n");
    echo 'FROM ' . htmlspecialchars($qry_from) . "\n";
}

// 3. WHERE
$qry_where          = '';
$criteria_cnt       = 0;
for ($x = 0; $x < $col; $x++) {
    if (!empty($curField[$x]) && !empty($curCriteria[$x]) && $x && isset($last_where) && isset($curAndOrCol)) {
        $qry_where  .= ' ' . strtoupper($curAndOrCol[$last_where]) . ' ';
    }
    if (!empty($curField[$x]) && !empty($curCriteria[$x])) {
        $qry_where  .= '(' . $curField[$x] . ' ' . $curCriteria[$x] . ')';
        $last_where = $x;
        $criteria_cnt++;
    }
} // end for
if ($criteria_cnt > 1) {
    $qry_where      = '(' . $qry_where . ')';
}
// OR rows ${'cur' . $or}[$x]
if (!isset($curAndOrRow)) {
    $curAndOrRow          = array();
}
for ($y = 0; $y <= $row; $y++) {
    $criteria_cnt         = 0;
    $qry_orwhere          = '';
    $last_orwhere         = '';
    for ($x = 0; $x < $col; $x++) {
        if (!empty($curField[$x]) && !empty(${'curOr' . $y}[$x]) && $x) {
            $qry_orwhere  .= ' ' . strtoupper($curAndOrCol[$last_orwhere]) . ' ';
        }
        if (!empty($curField[$x]) && !empty(${'curOr' . $y}[$x])) {
            $qry_orwhere  .= '(' . $curField[$x]
                          .  ' '
                          .  ${'curOr' . $y}[$x]
                          .  ')';
            $last_orwhere = $x;
            $criteria_cnt++;
        }
    } // end for
    if ($criteria_cnt > 1) {
        $qry_orwhere      = '(' . $qry_orwhere . ')';
    }
    if (!empty($qry_orwhere)) {
        $qry_where .= "\n"
                   .  strtoupper(isset($curAndOrRow[$y]) ? $curAndOrRow[$y] . ' ' : '')
                   .  $qry_orwhere;
    } // end if
} // end for

if (!empty($qry_where) && $qry_where != '()') {
    $encoded_qry .= urlencode('WHERE ' . $qry_where . "\n");
    echo 'WHERE ' . htmlspecialchars($qry_where) . "\n";
} // end if

// 4. ORDER BY
$last_orderby = 0;
if (!isset($qry_orderby)) {
    $qry_orderby      = '';
}
for ($x = 0; $x < $col; $x++) {
    if ($last_orderby && $x && !empty($curField[$x]) && !empty($curSort[$x])) {
        $qry_orderby  .=  ', ';
    }
    if (!empty($curField[$x]) && !empty($curSort[$x])) {
        // if they have chosen all fields using the * selector,
        // then sorting is not available
        // Robbat2 - Fix for Bug #570698
        if (substr($curField[$x], -2) != '.*') {
            $qry_orderby  .=  $curField[$x] . ' ' . $curSort[$x];
            $last_orderby = 1;
        }
    }
} // end for
if (!empty($qry_orderby)) {
    $encoded_qry .= urlencode('ORDER BY ' . $qry_orderby);
    echo 'ORDER BY ' . htmlspecialchars($qry_orderby) . "\n";
}
?>
        </textarea>
        <input type="hidden" name="encoded_sql_query" value="<?php echo $encoded_qry; ?>" />
        </fieldset>
        <fieldset class="tblFooters">
            <input type="submit" name="submit_sql" value="<?php echo $strRunQuery; ?>" />
        </fieldset>
    </td>
</tr>
</table>
</form>
<?php
/**
 * Displays the footer
 */
require_once './libraries/footer.inc.php';
?>