if (!empty($parser->statements[0]) && $parser->statements[0] instanceof SqlParser\Statements\SelectStatement) {
// Finding aliases and removing them, but we keep track of them to be
// able to replace them in select expression too.
$aliases = array();
foreach ($parser->statements[0]->from as $from) {
if (!empty($from->table) && !empty($from->alias)) {
$aliases[$from->alias] = $from->table;
// We remove the alias of the table because they are going to
// be replaced anyway.
$from->alias = null;
$from->expr = null;
// Force rebuild.
}
}
// Rebuilding the SELECT and FROM clauses.
$replaces = array(array('FROM', 'FROM ' . SqlParser\Components\ExpressionArray::build($parser->statements[0]->from)));
// Checking if the WHERE clause has to be replaced.
if (!empty($where_clause) && is_array($where_clause)) {
$replaces[] = array('WHERE', 'WHERE (' . implode(') OR (', $where_clause) . ')');
}
// Preparing to remove the LIMIT clause.
$replaces[] = array('LIMIT', '');
// Replacing the clauses.
$sql_query = SqlParser\Utils\Query::replaceClauses($parser->statements[0], $parser->list, $replaces);
// Removing the aliases by finding the alias followed by a dot.
$tokens = SqlParser\Lexer::getTokens($sql_query);
foreach ($aliases as $alias => $table) {
$tokens = SqlParser\Utils\Tokens::replaceTokens($tokens, array(array('value_str' => $alias), array('type' => SqlParser\Token::TYPE_OPERATOR, 'value_str' => '.')), array());
}
$sql_query = SqlParser\TokensList::build($tokens);
}
$aliases[$from->alias] = $from->table;
// We remove the alias of the table because they are going to
// be replaced anyway.
$from->alias = null;
$from->expr = null; // Force rebuild.
}
}
// Rebuilding the SELECT and FROM clauses.
if (count($parser->statements[0]->from) > 0
&& count($parser->statements[0]->union) === 0
) {
$replaces = array(
array(
'FROM', 'FROM ' . SqlParser\Components\ExpressionArray::build(
$parser->statements[0]->from
),
),
);
}
// Checking if the WHERE clause has to be replaced.
if ((!empty($where_clause)) && (is_array($where_clause))) {
$replaces[] = array(
'WHERE', 'WHERE (' . implode(') OR (', $where_clause) . ')'
);
}
// Preparing to remove the LIMIT clause.
$replaces[] = array('LIMIT', '');
