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analyzer and FOREIGN KEYS

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This commit is contained in:
Marc Delisle
2003-06-19 09:32:52 +00:00
parent a031a3a423
commit 75988f6b33
2 changed files with 71 additions and 3 deletions
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71
libraries/sqlparser.lib.php3
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@@ -663,7 +663,8 @@ if (!defined('PMA_SQP_LIB_INCLUDED')) {
'where_clause_identifiers' => array(),
'queryflags' => array(),
'select_expr' => array(),
'table_ref' => array()
'table_ref' => array(),
'foreign_keys' => array()
);
$subresult_empty = $subresult;
$seek_queryend = FALSE;
@@ -724,6 +725,12 @@ if (!defined('PMA_SQP_LIB_INCLUDED')) {
*
* and the identifiers of the where clause are put into the array
* ['where_clause_identifier']
*
* lem9: foreign keys
* ------------
* The CREATE TABLE may contain FOREIGN KEY clauses, so they get
* analyzed and ['foreign_keys'] is an array filled with the index list,
* the REFERENCES table name and REFERENCES index list.
*/
// must be sorted
@@ -1150,8 +1157,6 @@ if (!defined('PMA_SQP_LIB_INCLUDED')) {
// loop #2: for queryflags
// ,querytype (for queries != 'SELECT')
//
// This is not in the loop 1 to keep logic simple
// we will also need this queryflag in loop 2
// so set it here
if (isset($current_table_ref) && $current_table_ref > -1) {
@@ -1327,6 +1332,66 @@ if (!defined('PMA_SQP_LIB_INCLUDED')) {
} // end for $i (loop #2)
// -----------------------------------------------------
// loop #3: foreign keys
// (for now, check only the first query)
// (for now, identifiers must be backquoted)
$seen_foreign = FALSE;
$seen_references = FALSE;
$in_bracket = FALSE;
$foreign_key_number = -1;
for ($i = 0; $i < $size; $i++) {
if ($arr[$i]['type'] == 'alpha_reservedWord') {
$upper_data = strtoupper($arr[$i]['data']);
if ($upper_data == 'FOREIGN') {
$seen_foreign = TRUE;
$seen_references = FALSE;
}
if ($upper_data == 'REFERENCES') {
$seen_foreign = FALSE;
$seen_references = TRUE;
}
}
if ($arr[$i]['type'] == 'punct_bracket_open_round') {
$in_bracket = TRUE;
}
if ($arr[$i]['type'] == 'punct_bracket_close_round') {
$in_bracket = FALSE;
if ($seen_references) {
$seen_references = FALSE;
}
}
if (($arr[$i]['type'] == 'quote_backtick')) {
if ($seen_foreign && $in_bracket) {
// remove backquotes
$identifier = str_replace('`','',$arr[$i]['data']);
// new foreign key
$foreign_key_number++;
$foreign[$foreign_key_number]['index_list'][] = $identifier;
}
if ($seen_references) {
$identifier = str_replace('`','',$arr[$i]['data']);
if ($in_bracket) {
$foreign[$foreign_key_number]['ref_index_list'][] = $identifier;
} else {
$foreign[$foreign_key_number]['ref_table_name'] = $identifier;
}
}
}
} // end for $i (loop #3)
if (isset($foreign)) {
$subresult['foreign_keys'] = $foreign;
}
//DEBUG print_r($foreign);
if (isset($select_expr_clause)) {
$subresult['select_expr_clause'] = $select_expr_clause;
}