X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=lib%2Fschema.php;h=2e27955881c235450bbc383ad3e75791cfe11031;hb=bb087a965009fd93a5c02a9e10ab90adcc6b7963;hp=40a9fb505d60c97bba60ce983d2ac89dfb3df37b;hpb=7f674cc957ff36c394d0c1b6811d05d4a08bbf69;p=quix0rs-gnu-social.git
diff --git a/lib/schema.php b/lib/schema.php
index 40a9fb505d..2e27955881 100644
--- a/lib/schema.php
+++ b/lib/schema.php
@@ -119,65 +119,216 @@ class Schema
/**
* Creates a table with the given names and columns.
*
- * @param string $name Name of the table
- * @param array $columns Array of ColumnDef objects
- * for new table.
+ * @param string $tableName Name of the table
+ * @param array $def Table definition array listing fields and indexes.
*
* @return boolean success flag
*/
- public function createTable($name, $columns)
+ public function createTable($tableName, $def)
{
- $uniques = array();
- $primary = array();
- $indices = array();
+ $statements = $this->buildCreateTable($tableName, $def);
+ return $this->runSqlSet($statements);
+ }
- $sql = "CREATE TABLE $name (\n";
+ /**
+ * Build a set of SQL statements to create a table with the given
+ * name and columns.
+ *
+ * @param string $name Name of the table
+ * @param array $def Table definition array
+ *
+ * @return boolean success flag
+ */
+ public function buildCreateTable($name, $def)
+ {
+ $def = $this->validateDef($name, $def);
+ $def = $this->filterDef($def);
+ $sql = array();
- for ($i = 0; $i < count($columns); $i++) {
+ foreach ($def['fields'] as $col => $colDef) {
+ $this->appendColumnDef($sql, $col, $colDef);
+ }
- $cd =& $columns[$i];
+ // Primary, unique, and foreign keys are constraints, so go within
+ // the CREATE TABLE statement normally.
+ if (!empty($def['primary key'])) {
+ $this->appendPrimaryKeyDef($sql, $def['primary key']);
+ }
- if ($i > 0) {
- $sql .= ",\n";
+ if (!empty($def['unique keys'])) {
+ foreach ($def['unique keys'] as $col => $colDef) {
+ $this->appendUniqueKeyDef($sql, $col, $colDef);
}
+ }
- $sql .= $this->_columnSql($cd);
-
- switch ($cd->key) {
- case 'UNI':
- $uniques[] = $cd->name;
- break;
- case 'PRI':
- $primary[] = $cd->name;
- break;
- case 'MUL':
- $indices[] = $cd->name;
- break;
+ if (!empty($def['foreign keys'])) {
+ foreach ($def['foreign keys'] as $keyName => $keyDef) {
+ $this->appendForeignKeyDef($sql, $keyName, $keyDef);
}
}
- if (count($primary) > 0) { // it really should be...
- $sql .= ",\nconstraint primary key (" . implode(',', $primary) . ")";
- }
+ // Wrap the CREATE TABLE around the main body chunks...
+ $statements = array();
+ $statements[] = $this->startCreateTable($name, $def) . "\n" .
+ implode($sql, ",\n") . "\n" .
+ $this->endCreateTable($name, $def);
- foreach ($uniques as $u) {
- $sql .= ",\nunique index {$name}_{$u}_idx ($u)";
+ // Multi-value indexes are advisory and for best portability
+ // should be created as separate statements.
+ if (!empty($def['indexes'])) {
+ foreach ($def['indexes'] as $col => $colDef) {
+ $this->appendCreateIndex($statements, $name, $col, $colDef);
+ }
}
-
- foreach ($indices as $i) {
- $sql .= ",\nindex {$name}_{$i}_idx ($i)";
+ if (!empty($def['fulltext indexes'])) {
+ foreach ($def['fulltext indexes'] as $col => $colDef) {
+ $this->appendCreateFulltextIndex($statements, $name, $col, $colDef);
+ }
}
- $sql .= "); ";
+ return $statements;
+ }
- $res = $this->conn->query($sql);
+ /**
+ * Set up a 'create table' SQL statement.
+ *
+ * @param string $name table name
+ * @param array $def table definition
+ * @param $string
+ */
+ function startCreateTable($name, array $def)
+ {
+ return 'CREATE TABLE ' . $this->quoteIdentifier($name) . ' (';
+ }
- if (PEAR::isError($res)) {
- throw new Exception($res->getMessage());
- }
+ /**
+ * Close out a 'create table' SQL statement.
+ *
+ * @param string $name table name
+ * @param array $def table definition
+ * @return string
+ */
+ function endCreateTable($name, array $def)
+ {
+ return ')';
+ }
- return true;
+ /**
+ * Append an SQL fragment with a column definition in a CREATE TABLE statement.
+ *
+ * @param array $sql
+ * @param string $name
+ * @param array $def
+ */
+ function appendColumnDef(array &$sql, $name, array $def)
+ {
+ $sql[] = "$name " . $this->columnSql($def);
+ }
+
+ /**
+ * Append an SQL fragment with a constraint definition for a primary
+ * key in a CREATE TABLE statement.
+ *
+ * @param array $sql
+ * @param array $def
+ */
+ function appendPrimaryKeyDef(array &$sql, array $def)
+ {
+ $sql[] = "PRIMARY KEY " . $this->buildIndexList($def);
+ }
+
+ /**
+ * Append an SQL fragment with a constraint definition for a unique
+ * key in a CREATE TABLE statement.
+ *
+ * @param array $sql
+ * @param string $name
+ * @param array $def
+ */
+ function appendUniqueKeyDef(array &$sql, $name, array $def)
+ {
+ $sql[] = "CONSTRAINT $name UNIQUE " . $this->buildIndexList($def);
+ }
+
+ /**
+ * Append an SQL fragment with a constraint definition for a foreign
+ * key in a CREATE TABLE statement.
+ *
+ * @param array $sql
+ * @param string $name
+ * @param array $def
+ */
+ function appendForeignKeyDef(array &$sql, $name, array $def)
+ {
+ if (count($def) != 2) {
+ throw new Exception("Invalid foreign key def for $name: " . var_export($def, true));
+ }
+ list($refTable, $map) = $def;
+ $srcCols = array_keys($map);
+ $refCols = array_values($map);
+ $sql[] = "CONSTRAINT $name FOREIGN KEY " .
+ $this->buildIndexList($srcCols) .
+ " REFERENCES " .
+ $this->quoteIdentifier($refTable) .
+ " " .
+ $this->buildIndexList($refCols);
+ }
+
+ /**
+ * Append an SQL statement with an index definition for an advisory
+ * index over one or more columns on a table.
+ *
+ * @param array $statements
+ * @param string $table
+ * @param string $name
+ * @param array $def
+ */
+ function appendCreateIndex(array &$statements, $table, $name, array $def)
+ {
+ $statements[] = "CREATE INDEX $name ON $table " . $this->buildIndexList($def);
+ }
+
+ /**
+ * Append an SQL statement with an index definition for a full-text search
+ * index over one or more columns on a table.
+ *
+ * @param array $statements
+ * @param string $table
+ * @param string $name
+ * @param array $def
+ */
+ function appendCreateFulltextIndex(array &$statements, $table, $name, array $def)
+ {
+ throw new Exception("Fulltext index not supported in this database");
+ }
+
+ /**
+ * Append an SQL statement to drop an index from a table.
+ *
+ * @param array $statements
+ * @param string $table
+ * @param string $name
+ * @param array $def
+ */
+ function appendDropIndex(array &$statements, $table, $name)
+ {
+ $statements[] = "DROP INDEX $name ON " . $this->quoteIdentifier($table);
+ }
+
+ function buildIndexList(array $def)
+ {
+ // @fixme
+ return '(' . implode(',', array_map(array($this, 'buildIndexItem'), $def)) . ')';
+ }
+
+ function buildIndexItem($def)
+ {
+ if (is_array($def)) {
+ list($name, $size) = $def;
+ return $this->quoteIdentifier($name) . '(' . intval($size) . ')';
+ }
+ return $this->quoteIdentifier($def);
}
/**
@@ -339,48 +490,80 @@ class Schema
* alter the table to match the column definitions.
*
* @param string $tableName name of the table
- * @param array $columns array of ColumnDef
- * objects for the table
+ * @param array $def Table definition array
*
* @return boolean success flag
*/
public function ensureTable($tableName, $def)
{
- // XXX: DB engine portability -> toilet
+ $statements = $this->buildEnsureTable($tableName, $def);
+ return $this->runSqlSet($statements);
+ }
- try {
- $old = $this->getTableDef($tableName);
- } catch (Exception $e) {
- if (preg_match('/no such table/', $e->getMessage())) {
- return $this->createTable($tableName, $columns);
- } else {
- throw $e;
+ /**
+ * Run a given set of SQL commands on the connection in sequence.
+ * Empty input is ok.
+ *
+ * @fixme if multiple statements, wrap in a transaction?
+ * @param array $statements
+ * @return boolean success flag
+ */
+ function runSqlSet(array $statements)
+ {
+ $ok = true;
+ foreach ($statements as $sql) {
+ if (defined('DEBUG_INSTALLER')) {
+ echo "" . htmlspecialchars($sql) . "
\n";
+ }
+ $res = $this->conn->query($sql);
+
+ if (PEAR::isError($res)) {
+ throw new Exception($res->getMessage());
}
}
+ return $ok;
+ }
- $cur = array_keys($old['fields']);
- $new = array_keys($def['fields']);
+ /**
+ * Check a table's status, and if needed build a set
+ * of SQL statements which change it to be consistent
+ * with the given table definition.
+ *
+ * If the table does not yet exist, statements will
+ * be returned to create the table. If it does exist,
+ * statements will be returned to alter the table to
+ * match the column definitions.
+ *
+ * @param string $tableName name of the table
+ * @param array $columns array of ColumnDef
+ * objects for the table
+ *
+ * @return array of SQL statements
+ */
- $toadd = array_diff($new, $cur);
- $todrop = array_diff($cur, $new);
- $same = array_intersect($new, $cur);
- $tomod = array();
+ function buildEnsureTable($tableName, array $def)
+ {
+ try {
+ $old = $this->getTableDef($tableName);
+ } catch (SchemaTableMissingException $e) {
+ return $this->buildCreateTable($tableName, $def);
+ }
- // Find which fields have actually changed definition
- // in a way that we need to tweak them for this DB type.
- foreach ($same as $name) {
- $curCol = $old['fields'][$name];
- $newCol = $cur['fields'][$name];
+ // Filter the DB-independent table definition to match the current
+ // database engine's features and limitations.
+ $def = $this->validateDef($tableName, $def);
+ $def = $this->filterDef($def);
- if (!$this->columnsEqual($curCol, $newCol)) {
- $tomod[] = $name;
- }
- }
+ $statements = array();
+ $fields = $this->diffArrays($old, $def, 'fields', array($this, 'columnsEqual'));
+ $uniques = $this->diffArrays($old, $def, 'unique keys');
+ $indexes = $this->diffArrays($old, $def, 'indexes');
+ $foreign = $this->diffArrays($old, $def, 'foreign keys');
- if (count($toadd) + count($todrop) + count($tomod) == 0) {
- // nothing to do
- return true;
+ // Drop any obsolete or modified indexes ahead...
+ foreach ($indexes['del'] + $indexes['mod'] as $indexName) {
+ $this->appendDropIndex($statements, $tableName, $indexName);
}
// For efficiency, we want this all in one
@@ -388,30 +571,85 @@ class Schema
$phrase = array();
- foreach ($toadd as $columnName) {
+ foreach ($foreign['del'] + $foreign['mod'] as $keyName) {
+ $this->appendAlterDropForeign($phrase, $keyName);
+ }
+
+ foreach ($uniques['del'] + $uniques['mod'] as $keyName) {
+ $this->appendAlterDropUnique($phrase, $keyName);
+ }
+
+ foreach ($fields['add'] as $columnName) {
$this->appendAlterAddColumn($phrase, $columnName,
$def['fields'][$columnName]);
}
- foreach ($todrop as $columnName) {
+ foreach ($fields['mod'] as $columnName) {
$this->appendAlterModifyColumn($phrase, $columnName,
$old['fields'][$columnName],
$def['fields'][$columnName]);
}
- foreach ($tomod as $columnName) {
+ foreach ($fields['del'] as $columnName) {
$this->appendAlterDropColumn($phrase, $columnName);
}
- $sql = 'ALTER TABLE ' . $tableName . ' ' . implode(', ', $phrase);
+ foreach ($uniques['mod'] + $uniques['add'] as $keyName) {
+ $this->appendAlterAddUnique($phrase, $keyName, $def['unique keys'][$keyName]);
+ }
- $res = $this->conn->query($sql);
+ foreach ($foreign['mod'] + $foreign['add'] as $keyName) {
+ $this->appendAlterAddForeign($phrase, $keyName, $def['foreign keys'][$keyName]);
+ }
- if (PEAR::isError($res)) {
- throw new Exception($res->getMessage());
+ $this->appendAlterExtras($phrase, $tableName, $def);
+
+ if (count($phrase) > 0) {
+ $sql = 'ALTER TABLE ' . $tableName . ' ' . implode(",\n", $phrase);
+ $statements[] = $sql;
}
- return true;
+ // Now create any indexes...
+ foreach ($indexes['mod'] + $indexes['add'] as $indexName) {
+ $this->appendCreateIndex($statements, $tableName, $indexName, $def['indexes'][$indexName]);
+ }
+
+ return $statements;
+ }
+
+ function diffArrays($oldDef, $newDef, $section, $compareCallback=null)
+ {
+ $old = isset($oldDef[$section]) ? $oldDef[$section] : array();
+ $new = isset($newDef[$section]) ? $newDef[$section] : array();
+
+ $oldKeys = array_keys($old);
+ $newKeys = array_keys($new);
+
+ $toadd = array_diff($newKeys, $oldKeys);
+ $todrop = array_diff($oldKeys, $newKeys);
+ $same = array_intersect($newKeys, $oldKeys);
+ $tomod = array();
+ $tokeep = array();
+
+ // Find which fields have actually changed definition
+ // in a way that we need to tweak them for this DB type.
+ foreach ($same as $name) {
+ if ($compareCallback) {
+ $same = call_user_func($compareCallback, $old[$name], $new[$name]);
+ } else {
+ $same = ($old[$name] == $new[$name]);
+ }
+ if ($same) {
+ $tokeep[] = $name;
+ continue;
+ }
+ $tomod[] = $name;
+ }
+ return array('add' => $toadd,
+ 'del' => $todrop,
+ 'mod' => $tomod,
+ 'keep' => $tokeep,
+ 'count' => count($toadd) + count($todrop) + count($tomod));
}
/**
@@ -459,6 +697,37 @@ class Schema
$phrase[] = 'DROP COLUMN ' . $this->quoteIdentifier($columnName);
}
+ function appendAlterAddUnique(array &$phrase, $keyName, array $def)
+ {
+ $sql = array();
+ $sql[] = 'ADD';
+ $this->appendUniqueKeyDef($sql, $keyName, $def);
+ $phrase[] = implode(' ', $sql);
+ }
+
+ function appendAlterAddForeign(array &$phrase, $keyName, array $def)
+ {
+ $sql = array();
+ $sql[] = 'ADD';
+ $this->appendForeignKeyDef($sql, $keyName, $def);
+ $phrase[] = implode(' ', $sql);
+ }
+
+ function appendAlterDropUnique(array &$phrase, $keyName)
+ {
+ $phrase[] = 'DROP CONSTRAINT ' . $keyName;
+ }
+
+ function appendAlterDropForeign(array &$phrase, $keyName)
+ {
+ $phrase[] = 'DROP FOREIGN KEY ' . $keyName;
+ }
+
+ function appendAlterExtras(array &$phrase, $tableName, array $def)
+ {
+ // no-op
+ }
+
/**
* Quote a db/table/column identifier if necessary.
*
@@ -481,7 +750,7 @@ class Schema
function quoteValue($val)
{
- return $this->conn->escape($val);
+ return $this->conn->quoteSmart($val);
}
/**
@@ -554,11 +823,11 @@ class Schema
function columnSql(array $cd)
{
$line = array();
- $line[] = $this->typeAndSize();
+ $line[] = $this->typeAndSize($cd);
if (isset($cd['default'])) {
$line[] = 'default';
- $line[] = $this->quoted($cd['default']);
+ $line[] = $this->quoteDefaultValue($cd);
} else if (!empty($cd['not null'])) {
// Can't have both not null AND default!
$line[] = 'not null';
@@ -579,15 +848,17 @@ class Schema
function typeAndSize($column)
{
- $type = $this->mapType($column);
+ //$type = $this->mapType($column);
+ $type = $column['type'];
+ if (isset($column['size'])) {
+ $type = $column['size'] . $type;
+ }
$lengths = array();
- if ($column['type'] == 'numeric') {
- if (isset($column['precision'])) {
- $lengths[] = $column['precision'];
- if (isset($column['scale'])) {
- $lengths[] = $column['scale'];
- }
+ if (isset($column['precision'])) {
+ $lengths[] = $column['precision'];
+ if (isset($column['scale'])) {
+ $lengths[] = $column['scale'];
}
} else if (isset($column['length'])) {
$lengths[] = $column['length'];
@@ -600,27 +871,16 @@ class Schema
}
}
- /**
- * Map a native type back to an independent type + size
- *
- * @param string $type
- * @return array ($type, $size) -- $size may be null
- */
- protected function reverseMapType($type)
- {
- return array($type, null);
- }
-
/**
* Convert an old-style set of ColumnDef objects into the current
* Drupal-style schema definition array, for backwards compatibility
* with plugins written for 0.9.x.
*
* @param string $tableName
- * @param array $defs
+ * @param array $defs: array of ColumnDef objects
* @return array
*/
- function oldToNew($tableName, $defs)
+ protected function oldToNew($tableName, array $defs)
{
$table = array();
$prefixes = array(
@@ -630,7 +890,6 @@ class Schema
'big',
);
foreach ($defs as $cd) {
- $cd->addToTableDef($table);
$column = array();
$column['type'] = $cd->type;
foreach ($prefixes as $prefix) {
@@ -649,7 +908,7 @@ class Schema
if (!$cd->nullable) {
$column['not null'] = true;
}
- if ($cd->autoincrement) {
+ if ($cd->auto_increment) {
$column['type'] = 'serial';
}
if ($cd->default) {
@@ -680,6 +939,45 @@ class Schema
return $table;
}
+ /**
+ * Filter the given table definition array to match features available
+ * in this database.
+ *
+ * This lets us strip out unsupported things like comments, foreign keys,
+ * or type variants that we wouldn't get back from getTableDef().
+ *
+ * @param array $tableDef
+ */
+ function filterDef(array $tableDef)
+ {
+ return $tableDef;
+ }
+
+ /**
+ * Validate a table definition array, checking for basic structure.
+ *
+ * If necessary, converts from an old-style array of ColumnDef objects.
+ *
+ * @param string $tableName
+ * @param array $def: table definition array
+ * @return array validated table definition array
+ *
+ * @throws Exception on wildly invalid input
+ */
+ function validateDef($tableName, array $def)
+ {
+ if (isset($def[0]) && $def[0] instanceof ColumnDef) {
+ $def = $this->oldToNew($tableName, $def);
+ }
+
+ // A few quick checks :D
+ if (!isset($def['fields'])) {
+ throw new Exception("Invalid table definition for $tableName: no fields.");
+ }
+
+ return $def;
+ }
+
function isNumericType($type)
{
$type = strtolower($type);