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<?php
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/**
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* @ingroup schemaapi
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* @{
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*/
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class DatabaseSchema_mysql extends DatabaseSchema {
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public function tableExists($table) {
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return (bool) $this->connection->runQuery("SHOW TABLES LIKE '{". $table ."}'", array(), array())->fetchOne();
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}
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public function columnExists($table, $column) {
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return (bool) $this->connection->runQuery("SHOW COLUMNS FROM {". $this->escapeTable($table) ."} LIKE '". $this->escapeTable($column) ."'", array(), array())->fetchOne();
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}
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protected function createTableSql($name, $table) {
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if (empty($table['mysql_suffix'])) {
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$table['mysql_suffix'] = "/*!40100 DEFAULT CHARACTER SET UTF8 */";
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}
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$sql = "CREATE TABLE {". $name ."} (\n";
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// Add the SQL statement for each field.
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foreach ($table['fields'] as $field_name => $field) {
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$sql .= $this->createFieldSql($field_name, $this->processField($field)) .", \n";
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}
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// Process keys & indexes.
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$keys = $this->createKeysSql($table);
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if (count($keys)) {
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$sql .= implode(", \n", $keys) .", \n";
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}
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// Remove the last comma and space.
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$sql = substr($sql, 0, -3) ."\n) ";
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$sql .= $table['mysql_suffix'];
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return array($sql);
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}
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protected function createFieldSql($name, $spec) {
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$sql = "`". $name ."` ". $spec['mysql_type'];
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if (isset($spec['length'])) {
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$sql .= '('. $spec['length'] .')';
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}
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elseif (isset($spec['precision']) && isset($spec['scale'])) {
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$sql .= '('. $spec['precision'] .', '. $spec['scale'] .')';
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}
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if (!empty($spec['unsigned'])) {
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$sql .= ' unsigned';
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}
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if (!empty($spec['not null'])) {
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$sql .= ' NOT NULL';
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}
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if (!empty($spec['auto_increment'])) {
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$sql .= ' auto_increment';
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}
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if (isset($spec['default'])) {
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if (is_string($spec['default'])) {
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$spec['default'] = "'". $spec['default'] ."'";
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}
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$sql .= ' DEFAULT '. $spec['default'];
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}
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if (empty($spec['not null']) && !isset($spec['default'])) {
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$sql .= ' DEFAULT NULL';
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}
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return $sql;
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}
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protected function processField($field) {
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if (!isset($field['size'])) {
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$field['size'] = 'normal';
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}
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// Set the correct database-engine specific datatype.
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if (!isset($field['mysql_type'])) {
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$map = db_type_map();
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$field['mysql_type'] = $map[$field['type'] .':'. $field['size']];
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}
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if ($field['type'] == 'serial') {
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$field['auto_increment'] = TRUE;
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}
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return $field;
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}
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public function getFieldTypeMap() {
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// Put :normal last so it gets preserved by array_flip. This makes
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// it much easier for modules (such as schema.module) to map
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// database types back into schema types.
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static $map = array(
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'varchar:normal' => 'VARCHAR',
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'char:normal' => 'CHAR',
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'text:tiny' => 'TINYTEXT',
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'text:small' => 'TINYTEXT',
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'text:medium' => 'MEDIUMTEXT',
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'text:big' => 'LONGTEXT',
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'text:normal' => 'TEXT',
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'serial:tiny' => 'TINYINT',
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'serial:small' => 'SMALLINT',
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'serial:medium' => 'MEDIUMINT',
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'serial:big' => 'BIGINT',
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'serial:normal' => 'INT',
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'int:tiny' => 'TINYINT',
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'int:small' => 'SMALLINT',
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'int:medium' => 'MEDIUMINT',
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'int:big' => 'BIGINT',
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'int:normal' => 'INT',
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'float:tiny' => 'FLOAT',
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'float:small' => 'FLOAT',
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'float:medium' => 'FLOAT',
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'float:big' => 'DOUBLE',
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'float:normal' => 'FLOAT',
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'numeric:normal' => 'DECIMAL',
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'blob:big' => 'LONGBLOB',
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'blob:normal' => 'BLOB',
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'datetime:normal' => 'DATETIME',
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);
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return $map;
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}
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protected function createKeysSql($spec) {
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$keys = array();
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if (!empty($spec['primary key'])) {
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$keys[] = 'PRIMARY KEY ('. $this->createKeysSqlHelper($spec['primary key']) .')';
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}
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if (!empty($spec['unique keys'])) {
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foreach ($spec['unique keys'] as $key => $fields) {
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$keys[] = 'UNIQUE KEY '. $key .' ('. $this->createKeysSqlHelper($fields) .')';
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}
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}
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if (!empty($spec['indexes'])) {
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foreach ($spec['indexes'] as $index => $fields) {
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$keys[] = 'INDEX '. $index .' ('. $this->createKeysSqlHelper($fields) .')';
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}
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}
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return $keys;
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}
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protected function createKeySql($fields) {
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$ret = array();
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foreach ($fields as $field) {
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if (is_array($field)) {
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$ret[] = $field[0] .'('. $field[1] .')';
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}
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else {
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$ret[] = $field;
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}
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}
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return implode(', ', $ret);
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}
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protected function createKeysSqlHelper($fields) {
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$ret = array();
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foreach ($fields as $field) {
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if (is_array($field)) {
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$ret[] = $field[0] .'('. $field[1] .')';
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}
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else {
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$ret[] = $field;
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}
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}
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return implode(', ', $ret);
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}
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public function renameTable(&$ret, $table, $new_name) {
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$ret[] = update_sql('ALTER TABLE {'. $table .'} RENAME TO {'. $new_name .'}');
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}
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public function dropTable(&$ret, $table) {
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$ret[] = update_sql('DROP TABLE {'. $table .'}');
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}
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public function addField(&$ret, $table, $field, $spec, $keys_new = array()) {
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$fixnull = FALSE;
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if (!empty($spec['not null']) && !isset($spec['default'])) {
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$fixnull = TRUE;
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$spec['not null'] = FALSE;
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}
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$query = 'ALTER TABLE {'. $table .'} ADD ';
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$query .= $this->createFieldSql($field, $this->processField($spec));
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if (count($keys_new)) {
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$query .= ', ADD '. implode(', ADD ', $this->createKeysSql($keys_new));
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}
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$ret[] = update_sql($query);
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if (isset($spec['initial'])) {
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// All this because update_sql does not support %-placeholders.
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$sql = 'UPDATE {'. $table .'} SET '. $field .' = '. db_type_placeholder($spec['type']);
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$result = db_query($sql, $spec['initial']);
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$ret[] = array('success' => $result !== FALSE, 'query' => check_plain($sql .' ('. $spec['initial'] .')'));
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}
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if ($fixnull) {
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$spec['not null'] = TRUE;
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$this->changeField($ret, $table, $field, $field, $spec);
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}
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}
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public function dropField(&$ret, $table, $field) {
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$ret[] = update_sql('ALTER TABLE {'. $table .'} DROP '. $field);
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}
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public function fieldSetDefault(&$ret, $table, $field, $default) {
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if ($default == NULL) {
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$default = 'NULL';
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}
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else {
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$default = is_string($default) ? "'$default'" : $default;
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}
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$ret[] = update_sql('ALTER TABLE {'. $table .'} ALTER COLUMN '. $field .' SET DEFAULT '. $default);
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}
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public function fieldSetNoDefault(&$ret, $table, $field) {
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$ret[] = update_sql('ALTER TABLE {'. $table .'} ALTER COLUMN '. $field .' DROP DEFAULT');
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}
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public function addPrimaryKey(&$ret, $table, $fields) {
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$ret[] = update_sql('ALTER TABLE {'. $table .'} ADD PRIMARY KEY ('.
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$this->createKeySql($fields) .')');
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}
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public function dropPrimaryKey(&$ret, $table) {
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$ret[] = update_sql('ALTER TABLE {'. $table .'} DROP PRIMARY KEY');
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}
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public function addUniqueKey(&$ret, $table, $name, $fields) {
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$ret[] = update_sql('ALTER TABLE {'. $table .'} ADD UNIQUE KEY '.
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$name .' ('. $this->createKeySql($fields) .')');
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}
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public function dropUniqueKey(&$ret, $table, $name) {
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$ret[] = update_sql('ALTER TABLE {'. $table .'} DROP KEY '. $name);
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}
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public function addIndex(&$ret, $table, $name, $fields) {
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$query = 'ALTER TABLE {'. $table .'} ADD INDEX '. $name .' ('. $this->createKeySql($fields) .')';
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$ret[] = update_sql($query);
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}
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public function dropIndex(&$ret, $table, $name) {
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$ret[] = update_sql('ALTER TABLE {'. $table .'} DROP INDEX '. $name);
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}
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public function changeField(&$ret, $table, $field, $field_new, $spec, $keys_new = array()) {
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$sql = 'ALTER TABLE {'. $table .'} CHANGE '. $field .' '.
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$this->createFieldSql($field_new, $this->processField($spec));
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if (count($keys_new)) {
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$sql .= ', ADD '. implode(', ADD ', $this->createKeysSql($keys_new));
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}
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$ret[] = update_sql($sql);
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}
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}
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/**
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* @} End of "ingroup schemaapi".
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*/
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