/**
* Returns true if table contains given index $name, otherwise false.
*
* @param $name name of the index
*
* @return true if table contains given index $name, otherwise false
*/
public static function contains_index($node_schema, $node_table, $name)
{
$found = false;
$indexes = format_index::get_table_indexes($node_schema, $node_table);
foreach ($indexes as $index) {
if (strcasecmp($index['name'], $name) == 0) {
$found = true;
break;
}
}
return $found;
}
public static function diff_indexes_table($ofs, $old_schema, $old_table, $new_schema, $new_table)
{
// Drop indexes that do not exist in new schema or are modified
foreach (self::get_drop_indexes($old_schema, $old_table, $new_schema, $new_table) as $index) {
$ofs->write(mssql10_index::get_drop_sql($new_schema, $new_table, $index));
}
// Add new indexes
if ($old_schema == NULL) {
foreach (format_index::get_table_indexes($new_schema, $new_table) as $index) {
$ofs->write(mssql10_index::get_creation_sql($new_schema, $new_table, $index) . "\n");
}
} else {
foreach (self::get_new_indexes($old_schema, $old_table, $new_schema, $new_table) as $index) {
$ofs->write(mssql10_index::get_creation_sql($new_schema, $new_table, $index) . "\n");
}
}
}
public static function diff_indexes_table_bits($old_schema, $old_table, $new_schema, $new_table)
{
$bits = array();
// Drop indexes that do not exist in new schema or are modified
foreach (static::get_drop_indexes($old_schema, $old_table, $new_schema, $new_table) as $index) {
$bits[] = format_index::get_alter_drop_sql($new_schema, $new_table, $index);
}
// Add new indexes
if ($old_schema == null) {
foreach (format_index::get_table_indexes($new_schema, $new_table) as $index) {
$bits[] = format_index::get_alter_add_sql($new_schema, $new_table, $index);
}
} else {
foreach (static::get_new_indexes($old_schema, $old_table, $new_schema, $new_table) as $index) {
$bits[] = format_index::get_alter_add_sql($new_schema, $new_table, $index);
}
}
return $bits;
}
public static function get_table_index($node_schema, $node_table, $name)
{
$indexes = format_index::get_table_indexes($node_schema, $node_table);
$return_index = NULL;
foreach ($indexes as $index) {
if (strcasecmp($index['name'], $name) == 0) {
if ($return_index === NULL) {
$return_index = $index;
} else {
throw new exception("more than one table " . $node_schema['name'] . '.' . $node_table['name'] . " index called " . $name . " found");
}
}
}
return $return_index;
}
/**
* Returns list of indexes that should be added.
*
* @param old_table original table
* @param new_table new table
*
* @return list of indexes that should be added
*/
public static function get_new_indexes($old_schema, $old_table, $new_schema, $new_table)
{
$list = array();
if ($new_table != null) {
if ($old_table == null) {
foreach (format_index::get_table_indexes($new_schema, $new_table) as $index) {
$list[] = $index;
}
} else {
foreach (format_index::get_table_indexes($new_schema, $new_table) as $index) {
$old_index = dbx::get_table_index($old_schema, $old_table, $index['name']);
if (!pgsql8_table::contains_index($old_schema, $old_table, $index['name'])) {
$list[] = $index;
} else {
if (!pgsql8_index::equals($old_index, $index)) {
$list[] = $index;
}
}
}
}
}
return $list;
}