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<?php |
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namespace Lagdo\DbAdmin\Driver\PgSql\Db; |
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use Lagdo\DbAdmin\Driver\Entity\TableFieldEntity; |
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use Lagdo\DbAdmin\Driver\Entity\TableEntity; |
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use Lagdo\DbAdmin\Driver\Entity\IndexEntity; |
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use Lagdo\DbAdmin\Driver\Entity\ForeignKeyEntity; |
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trait TableTrait |
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{ |
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/** |
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* @param string $table |
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* |
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* @return array |
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*/ |
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private function queryStatus(string $table = '') |
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{ |
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$query = "SELECT c.relname AS \"Name\", CASE c.relkind " . |
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"WHEN 'r' THEN 'table' WHEN 'm' THEN 'materialized view' ELSE 'view' END AS \"Engine\", " . |
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"pg_relation_size(c.oid) AS \"Data_length\", " . |
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"pg_total_relation_size(c.oid) - pg_relation_size(c.oid) AS \"Index_length\", " . |
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"obj_description(c.oid, 'pg_class') AS \"Comment\", " . |
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($this->driver->minVersion(12) ? "''" : "CASE WHEN c.relhasoids THEN 'oid' ELSE '' END") . |
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" AS \"Oid\", c.reltuples as \"Rows\", n.nspname FROM pg_class c " . |
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"JOIN pg_namespace n ON(n.nspname = current_schema() AND n.oid = c.relnamespace) " . |
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"WHERE relkind IN ('r', 'm', 'v', 'f', 'p') " . |
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($table != "" ? "AND relname = " . $this->driver->quote($table) : "ORDER BY relname"); |
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return $this->driver->rows($query); |
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} |
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/** |
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* @param array $row |
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* |
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* @return TableEntity |
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*/ |
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private function makeStatus(array $row) |
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{ |
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$status = new TableEntity($row['Name']); |
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$status->engine = $row['Engine']; |
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$status->schema = $row['nspname']; |
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$status->dataLength = $row['Data_length']; |
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$status->indexLength = $row['Index_length']; |
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$status->oid = $row['Oid']; |
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$status->rows = $row['Rows']; |
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$status->comment = $row['Comment']; |
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return $status; |
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} |
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/** |
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* Get the primary key of a table |
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* Same as indexes(), but the columns of the primary key are returned in a array |
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* |
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* @param string $table |
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* |
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* @return array |
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*/ |
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private function primaryKeyColumns(string $table) |
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{ |
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$indexes = []; |
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$table_oid = $this->driver->result("SELECT oid FROM pg_class WHERE " . |
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"relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = current_schema()) " . |
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"AND relname = " . $this->driver->quote($table)); |
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$columns = $this->driver->keyValues("SELECT attnum, attname FROM pg_attribute WHERE " . |
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"attrelid = $table_oid AND attnum > 0"); |
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foreach ($this->driver->rows("SELECT relname, indisunique::int, indisprimary::int, indkey, " . |
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"indoption, (indpred IS NOT NULL)::int as indispartial FROM pg_index i, pg_class ci " . |
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"WHERE i.indrelid = $table_oid AND ci.oid = i.indexrelid") as $row) |
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{ |
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// $relname = $row["relname"]; |
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if ($row["indisprimary"]) { |
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foreach (explode(" ", $row["indkey"]) as $indkey) { |
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$indexes[] = $columns[$indkey]; |
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} |
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} |
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} |
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return $indexes; |
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} |
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/** |
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* @param array $row |
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* |
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* @return string |
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*/ |
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private function getFieldDefault(array $row) |
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{ |
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$values = [ |
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'a' => 'GENERATED ALWAYS AS IDENTITY', |
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'd' => 'GENERATED BY DEFAULT AS IDENTITY', |
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]; |
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$default = isset($values[$row['identity']]) ? $values[$row['identity']] : $row["default"]; |
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if (!preg_match('~(.+)::[^,)]+(.*)~', $row["default"] ?? '', $match)) { |
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return $default; |
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} |
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$match = array_pad($match, 3, ''); |
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if ($match[1] == "NULL") { |
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return null; |
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} |
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if (!empty($match[1]) && $match[1][0] == "'") { |
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return $this->driver->unescapeId($match[1]) . $match[2]; |
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} |
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return $match[1] . $match[2]; |
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} |
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/** |
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* @param array $row |
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* |
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* @return array |
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*/ |
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private function getFieldTypes(array $row) |
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{ |
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$aliases = [ |
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'timestamp without time zone' => 'timestamp', |
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'timestamp with time zone' => 'timestamptz', |
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]; |
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preg_match('~([^([]+)(\((.*)\))?([a-z ]+)?((\[[0-9]*])*)$~', $row["full_type"], $match); |
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list(, $type, $_length, $length, $addon, $array) = $match; |
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$length .= $array; |
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$checkType = $type . $addon; |
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if (isset($aliases[$checkType])) { |
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$type = $aliases[$checkType]; |
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$fullType = $type . $_length . $array; |
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return [$length, $type, $fullType]; |
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} |
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$fullType = $type . $_length . $addon . $array; |
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return [$length, $type, $fullType]; |
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} |
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/** |
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* @param array $row |
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* @param array $primaryKeyColumns |
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* |
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* @return TableFieldEntity |
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*/ |
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private function makeFieldEntity(array $row, array $primaryKeyColumns) |
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{ |
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$field = new TableFieldEntity(); |
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$field->name = $row["field"]; |
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$field->primary = \in_array($field->name, $primaryKeyColumns); |
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$field->fullType = $row["full_type"]; |
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$field->default = $this->getFieldDefault($row); |
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$field->comment = $row["comment"]; |
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//! No collation, no info about primary keys |
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list($field->length, $field->type, $field->fullType) = $this->getFieldTypes($row); |
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$field->null = !$row["attnotnull"]; |
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$field->autoIncrement = $row['identity'] || preg_match('~^nextval\(~i', $row["default"] ?? ''); |
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$field->privileges = ["insert" => 1, "select" => 1, "update" => 1]; |
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return $field; |
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} |
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/** |
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* @param array $row |
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* |
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* @return string |
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*/ |
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private function getIndexType(array $row) |
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{ |
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if ($row['indispartial']) { |
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return 'INDEX'; |
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} |
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if ($row['indisprimary']) { |
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return 'PRIMARY'; |
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} |
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if ($row['indisunique']) { |
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return 'UNIQUE'; |
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} |
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return 'INDEX'; |
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} |
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/** |
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* @param array $row |
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* @param array $columns |
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* |
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* @return IndexEntity |
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*/ |
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private function makeIndexEntity(array $row, array $columns) |
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{ |
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$index = new IndexEntity(); |
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$index->type = $this->getIndexType($row); |
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$index->columns = []; |
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foreach (explode(' ', $row['indkey']) as $indkey) { |
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$index->columns[] = $columns[$indkey]; |
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} |
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$index->descs = []; |
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foreach (explode(' ', $row['indoption']) as $indoption) { |
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$index->descs[] = ($indoption & 1 ? '1' : null); // 1 - INDOPTION_DESC |
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} |
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$index->lengths = []; |
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return $index; |
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} |
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/** |
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* @param array $row |
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* |
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* @return ForeignKeyEntity |
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*/ |
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private function makeForeignKeyEntity(array $row) |
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{ |
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if (!preg_match('~FOREIGN KEY\s*\((.+)\)\s*REFERENCES (.+)\((.+)\)(.*)$~iA', $row['definition'], $match)) { |
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return null; |
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} |
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$onActions = $this->driver->actions(); |
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$match = array_pad($match, 5, ''); |
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$foreignKey = new ForeignKeyEntity(); |
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$foreignKey->source = array_map('trim', explode(',', $match[1])); |
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$foreignKey->target = array_map('trim', explode(',', $match[3])); |
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if (preg_match('~^(("([^"]|"")+"|[^"]+)\.)?"?("([^"]|"")+"|[^"]+)$~', $match[2], $match2)) { |
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$match2 = array_pad($match2, 5, ''); |
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$foreignKey->schema = str_replace('""', '"', preg_replace('~^"(.+)"$~', '\1', $match2[2])); |
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$foreignKey->table = str_replace('""', '"', preg_replace('~^"(.+)"$~', '\1', $match2[4])); |
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} |
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$foreignKey->onDelete = preg_match("~ON DELETE ($onActions)~", $match[4], $match2) ? $match2[1] : 'NO ACTION'; |
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$foreignKey->onUpdate = preg_match("~ON UPDATE ($onActions)~", $match[4], $match2) ? $match2[1] : 'NO ACTION'; |
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return $foreignKey; |
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} |
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} |
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