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<?php |
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declare(strict_types=1); |
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/** |
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* Database Access Layer. |
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* @author Doug Wright |
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*/ |
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namespace DVDoug\DB; |
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use function addslashes; |
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use function array_intersect_key; |
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use function array_map; |
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use function array_unique; |
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use function asort; |
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use function explode; |
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use function implode; |
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use function in_array; |
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use function sprintf; |
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use function strpos; |
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use function strtolower; |
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use function substr; |
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use function trim; |
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/** |
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* Metadata about a database column. |
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* @author Doug Wright |
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*/ |
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trait DDLGeneration |
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{ |
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/** |
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* Get MySQL column definition. |
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*/ |
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public function getMySQLColumnDef(): string |
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{ |
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$def = '`' . strtolower($this->getName()) . '` '; |
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$MySQLType = $this->getMySQLType(); |
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if (strpos($MySQLType, 'UNSIGNED') !== false) { |
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$unsigned = true; |
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$MySQLType = substr($MySQLType, 0, -9); |
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} else { |
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$unsigned = false; |
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} |
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if (in_array($MySQLType, ['ENUM', 'SET'])) { |
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$query = sprintf('SHOW COLUMNS FROM %s.%s LIKE %s', |
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$this->connection->quoteIdentifier($this->database), |
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$this->connection->quoteIdentifier($this->table), |
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$this->connection->escape($this->name)); |
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$statement = $this->connection->query($query); |
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$values = $statement->fetchAssoc(false)['Type']; |
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$values = explode("','", substr($values, strpos($values, '(') + 2, -2)); |
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$values = array_intersect_key($values, array_unique(array_map('strtolower', $values))); |
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asort($values); |
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$def .= $MySQLType; |
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$def .= '(' . implode(', ', array_map(function ($c) {return "'" . addslashes($c) . "'"; }, $values)) . ')'; |
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} elseif (in_array($MySQLType, ['CHAR', 'VARCHAR']) && $this->getLength() < 64 && $this->getDistinctValueCount() <= 16) { |
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$query = sprintf('SELECT DISTINCT %s FROM %s.%s WHERE %s IS NOT NULL ORDER BY %s ASC', |
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$this->connection->quoteIdentifier($this->name), |
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$this->connection->quoteIdentifier($this->database), |
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$this->connection->quoteIdentifier($this->table), |
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$this->connection->quoteIdentifier($this->name), |
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$this->connection->quoteIdentifier($this->name)); |
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$values = []; |
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foreach ($this->connection->query($query) as $value) { |
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$values[] = trim($value[$this->name]); |
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} |
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$values = array_intersect_key($values, array_unique(array_map('strtolower', $values))); |
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asort($values); |
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if ($values) { |
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$def .= 'ENUM'; |
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$def .= '(' . implode(', ', array_map(function ($c) {return "'" . addslashes($c) . "'"; }, $values)) . ')'; |
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} else { |
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$def .= $MySQLType; |
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if ($this->getLength() > 0) { |
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$def .= '(' . $this->getLength() . ')'; |
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} |
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} |
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} elseif (in_array($MySQLType, ['DATETIME', 'TIMESTAMP', 'TIME'])) { |
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$def .= $MySQLType; |
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$def .= '(' . (int) $this->getScale() . ')'; |
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} else { |
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$def .= $MySQLType; |
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if ($this->getScale() && !in_array($MySQLType, ['DATE'])) { |
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$def .= '(' . $this->getPrecision() . ',' . $this->getScale() . ')'; |
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} elseif ($this->getPrecision() && !in_array($MySQLType, ['TINYINT', 'SMALLINT', 'MEDIUMINT', 'INT', 'BIGINT'])) { |
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$def .= '(' . $this->getPrecision() . ')'; |
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} elseif ($this->getLength() > 0 && !in_array($MySQLType, ['TINYINT', 'SMALLINT', 'MEDIUMINT', 'INT', 'BIGINT'])) { |
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$def .= '(' . $this->getLength() . ')'; |
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} |
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if ($unsigned) { |
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$def .= ' UNSIGNED'; |
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} |
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} |
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if ($this->isNullable()) { |
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$def .= ' NULL'; |
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} else { |
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$def .= ' NOT NULL'; |
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} |
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return $def; |
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} |
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/** |
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* Get Oracle column definition. |
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*/ |
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public function getOracleColumnDef(): string |
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{ |
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$def = '`' . strtolower($this->getName()) . '` '; |
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$def .= $this->getOracleType(); |
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if ($this->getScale()) { |
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$def .= '(' . $this->getPrecision() . ',' . $this->getScale() . ')'; |
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} elseif ($this->getPrecision()) { |
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$def .= '(' . $this->getPrecision() . ')'; |
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} elseif ($this->getLength()) { |
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$def .= '(' . $this->getLength() . ')'; |
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} |
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if ($this->isNullable()) { |
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$def .= ' NULL'; |
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} else { |
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$def .= ' NOT NULL'; |
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} |
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return $def; |
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} |
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} |
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dvdoug /
DB
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