Avoid warning if analyzing failed.
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@@ -1189,7 +1189,7 @@ if ($is_minimum_common == FALSE) {
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// for each table_ref alias, put the true name of the table
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// in the corresponding select expressions
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if (isset($current_table_ref) && ($seen_end_of_table_ref || $i == $size-1)) {
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if (isset($current_table_ref) && ($seen_end_of_table_ref || $i == $size-1) && $subresult != $subresult_empty) {
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for ($tr=0; $tr <= $current_table_ref; $tr++) {
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$alias = $subresult['table_ref'][$tr]['table_alias'];
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$truename = $subresult['table_ref'][$tr]['table_true_name'];
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