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Form function to get valid where clauses

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This commit is contained in:
Atul Pratap Singh 2012-07-15 14:47:33 +05:30
parent 5668e7f908
commit 26c77f3a90
2 changed files with 49 additions and 29 deletions
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41
db_qbe.php
View File

@ -253,10 +253,8 @@ if (isset($criteriaColumn) && count($criteriaColumn) > 0) {
// Initialize some variables
$tab_all = array();
$col_all = array();
$tab_wher = array();
$tab_know = array();
$tab_left = array();
$col_where = array();
$fromclause = '';
// We only start this if we have fields, otherwise it would be dumb
@ -271,37 +269,22 @@ if (isset($criteriaColumn) && count($criteriaColumn) > 0) {
$col_all[] = $tab . '.' . str_replace('`', '', $col_raw);
}
} // end while
// Cleans temp vars w/o further use
unset($tab_raw);
unset($col_raw);
unset($col1);
// 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 ($column_index = 0; $column_index < $crit_cnt; $column_index++) {
$curr_tab = explode('.', $criteriaColumn[$column_index]);
if (! empty($curr_tab[0]) && ! empty($curr_tab[1])) {
$tab_raw = $curr_tab[0];
$tab = str_replace('`', '', $tab_raw);
$col_raw = $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[$column_index])) {
if (substr($criteria[$column_index], 0, 1) == '=' || stristr($criteria[$column_index], 'is')) {
$col_where[$col1] = $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);
// Get tables and columns with valid where clauses
$valid_where_clauses = getWhereClauseTablesAndColumns(
$criteriaColumn, $criteria
);
$where_clause_tables = $valid_where_clauses['where_clause_tables'];
$where_clause_columns = $valid_where_clauses['where_clause_columns'];
// Get master table
$master = PMA_dbQbeGetMasterTable(
$db, $tab_all, $col_all, $col_where, $tab_wher
$db, $tab_all, $col_all, $where_clause_columns, $where_clause_tables
);
$tab_left = $tab_all;
unset($tab_left[$master]);

37
libraries/db_qbe.lib.php
View File

@ -850,4 +850,41 @@ function PMA_dbQbeGetMasterTable($db, $all_tables, $all_columns,
} // end if (exactly one where clause)
return $master;
}
/**
* Provides columns and tables that have valid where clause criteria
*
* @param string $criteriaColumn Selected table.columns
* @param string $criteria Already Filled criteria
*
* @return array
*/
function getWhereClauseTablesAndColumns($criteriaColumn, $criteria) {
$where_clause_columns = array();
$where_clause_tables = array();
// Now we need all tables that we have in the where clause
for ($column_index = 0; $column_index < count($criteria); $column_index++) {
$current_table = explode('.', $criteriaColumn[$column_index]);
if (empty($current_table[0]) || empty($current_table[1])) {
continue;
} // end if
$table = str_replace('`', '', $current_table[0]);
$column = str_replace('`', '', $current_table[1]);
$column = $table . '.' . $column;
// 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[$column_index])) {
if (substr($criteria[$column_index], 0, 1) == '='
|| stristr($criteria[$column_index], 'is')
) {
$where_clause_columns[$column] = $column;
$where_clause_tables[$table] = $table;
}
} // end if
} // end for
return array(
'where_clause_tables' => $where_clause_tables,
'where_clause_columns' => $where_clause_columns
);
}
?>