mirror of
https://github.com/silverstripe/silverstripe-postgresql
synced 2024-10-22 17:05:45 +02:00
1488 lines
46 KiB
PHP
1488 lines
46 KiB
PHP
<?php
|
|
|
|
/**
|
|
* PostgreSQL schema manager
|
|
*
|
|
* @package sapphire
|
|
* @subpackage model
|
|
*/
|
|
class PostgreSQLSchemaManager extends DBSchemaManager {
|
|
|
|
/**
|
|
* Identifier for this schema, used for configuring schema-specific table
|
|
* creation options
|
|
*/
|
|
const ID = 'PostgreSQL';
|
|
|
|
/**
|
|
* Instance of the database controller this schema belongs to
|
|
*
|
|
* @var PostgreSQLDatabase
|
|
*/
|
|
protected $database = null;
|
|
|
|
/**
|
|
* This holds a copy of all the constraint results that are returned
|
|
* via the function constraintExists(). This is a bit faster than
|
|
* repeatedly querying this column, and should allow the database
|
|
* to use it's built-in caching features for better queries.
|
|
*
|
|
* @var array
|
|
*/
|
|
protected static $cached_constraints = array();
|
|
|
|
/**
|
|
*
|
|
* This holds a copy of all the queries that run through the function fieldList()
|
|
* This is one of the most-often called functions, and repeats itself a great deal in the unit tests.
|
|
*
|
|
* @var array
|
|
*/
|
|
protected static $cached_fieldlists = array();
|
|
|
|
protected function indexKey($table, $index, $spec) {
|
|
return $this->buildPostgresIndexName($table, $index);
|
|
}
|
|
|
|
/**
|
|
* Creates a postgres database, ignoring model_schema_as_database
|
|
*
|
|
* @param string $name
|
|
*/
|
|
public function createPostgresDatabase($name) {
|
|
$this->query("CREATE DATABASE \"$name\";");
|
|
}
|
|
|
|
public function createDatabase($name) {
|
|
if(PostgreSQLDatabase::model_schema_as_database()) {
|
|
$schemaName = $this->database->databaseToSchemaName($name);
|
|
return $this->createSchema($schemaName);
|
|
}
|
|
return $this->createPostgresDatabase($name);
|
|
}
|
|
|
|
/**
|
|
* Determines if a postgres database exists, ignoring model_schema_as_database
|
|
*
|
|
* @param string $name
|
|
* @return boolean
|
|
*/
|
|
public function postgresDatabaseExists($name) {
|
|
$result = $this->preparedQuery("SELECT datname FROM pg_database WHERE datname = ?;", array($name));
|
|
return $result->first() ? true : false;
|
|
}
|
|
|
|
public function databaseExists($name) {
|
|
if(PostgreSQLDatabase::model_schema_as_database()) {
|
|
$schemaName = $this->database->databaseToSchemaName($name);
|
|
return $this->schemaExists($schemaName);
|
|
}
|
|
return $this->postgresDatabaseExists($name);
|
|
}
|
|
|
|
/**
|
|
* Determines the list of all postgres databases, ignoring model_schema_as_database
|
|
*
|
|
* @return array
|
|
*/
|
|
public function postgresDatabaseList() {
|
|
return $this->query("SELECT datname FROM pg_database WHERE datistemplate=false;")->column();
|
|
}
|
|
|
|
public function databaseList() {
|
|
if(PostgreSQLDatabase::model_schema_as_database()) {
|
|
$schemas = $this->schemaList();
|
|
$names = array();
|
|
foreach($schemas as $schema) {
|
|
$names[] = $this->database->schemaToDatabaseName($schema);
|
|
}
|
|
return array_unique($names);
|
|
}
|
|
return $this->postgresDatabaseList();
|
|
}
|
|
/**
|
|
* Drops a postgres database, ignoring model_schema_as_database
|
|
*
|
|
* @param string $name
|
|
*/
|
|
public function dropPostgresDatabase($name) {
|
|
$nameSQL = $this->database->escapeIdentifier($name);
|
|
$this->query("DROP DATABASE $nameSQL;");
|
|
}
|
|
|
|
public function dropDatabase($name) {
|
|
if(PostgreSQLDatabase::model_schema_as_database()) {
|
|
$schemaName = $this->database->databaseToSchemaName($name);
|
|
return $this->dropSchema($schemaName);
|
|
}
|
|
$this->dropPostgresDatabase($name);
|
|
}
|
|
|
|
/**
|
|
* Returns true if the schema exists in the current database
|
|
*
|
|
* @param string $name
|
|
* @return boolean
|
|
*/
|
|
public function schemaExists($name) {
|
|
return $this->preparedQuery(
|
|
"SELECT nspname FROM pg_catalog.pg_namespace WHERE nspname = ?;",
|
|
array($name)
|
|
)->first() ? true : false;
|
|
}
|
|
|
|
/**
|
|
* Creates a schema in the current database
|
|
*
|
|
* @param string $name
|
|
*/
|
|
public function createSchema($name) {
|
|
$nameSQL = $this->database->escapeIdentifier($name);
|
|
$this->query("CREATE SCHEMA $nameSQL;");
|
|
}
|
|
|
|
/**
|
|
* Drops a schema from the database. Use carefully!
|
|
*
|
|
* @param string $name
|
|
*/
|
|
public function dropSchema($name) {
|
|
$nameSQL = $this->database->escapeIdentifier($name);
|
|
$this->query("DROP SCHEMA $nameSQL CASCADE;");
|
|
}
|
|
|
|
/**
|
|
* Returns the list of all available schemas on the current database
|
|
*
|
|
* @return array
|
|
*/
|
|
public function schemaList() {
|
|
return $this->query("
|
|
SELECT nspname
|
|
FROM pg_catalog.pg_namespace
|
|
WHERE nspname <> 'information_schema' AND nspname !~ E'^pg_'"
|
|
)->column();
|
|
}
|
|
|
|
public function createTable($table, $fields = null, $indexes = null, $options = null, $advancedOptions = null) {
|
|
|
|
$fieldSchemas = $indexSchemas = "";
|
|
if($fields) foreach($fields as $k => $v) {
|
|
$fieldSchemas .= "\"$k\" $v,\n";
|
|
}
|
|
if(!empty($options[self::ID])) {
|
|
$addOptions = $options[self::ID];
|
|
} elseif (!empty($options[get_class($this)])) {
|
|
Deprecation::notice('3.2', 'Use PostgreSQLSchemaManager::ID for referencing postgres-specific table creation options');
|
|
$addOptions = $options[get_class($this)];
|
|
} else {
|
|
$addOptions = null;
|
|
}
|
|
|
|
//First of all, does this table already exist
|
|
$doesExist = $this->hasTable($table);
|
|
if($doesExist) {
|
|
// Table already exists, just return the name, in line with baseclass documentation.
|
|
return $table;
|
|
}
|
|
|
|
//If we have a fulltext search request, then we need to create a special column
|
|
//for GiST searches
|
|
$fulltexts = '';
|
|
$triggers = '';
|
|
if($indexes) {
|
|
foreach($indexes as $name => $this_index){
|
|
if(is_array($this_index) && $this_index['type'] == 'fulltext') {
|
|
$ts_details = $this->fulltext($this_index, $table, $name);
|
|
$fulltexts .= $ts_details['fulltexts'] . ', ';
|
|
$triggers .= $ts_details['triggers'];
|
|
}
|
|
}
|
|
}
|
|
|
|
if($indexes) foreach($indexes as $k => $v) {
|
|
$indexSchemas .= $this->getIndexSqlDefinition($table, $k, $v) . "\n";
|
|
}
|
|
|
|
//Do we need to create a tablespace for this item?
|
|
if($advancedOptions && isset($advancedOptions['tablespace'])){
|
|
$this->createOrReplaceTablespace(
|
|
$advancedOptions['tablespace']['name'],
|
|
$advancedOptions['tablespace']['location']
|
|
);
|
|
$tableSpace = ' TABLESPACE ' . $advancedOptions['tablespace']['name'];
|
|
} else
|
|
$tableSpace = '';
|
|
|
|
$this->query("CREATE TABLE \"$table\" (
|
|
$fieldSchemas
|
|
$fulltexts
|
|
primary key (\"ID\")
|
|
)$tableSpace; $indexSchemas $addOptions");
|
|
|
|
if($triggers!=''){
|
|
$this->query($triggers);
|
|
}
|
|
|
|
//If we have a partitioning requirement, we do that here:
|
|
if($advancedOptions && isset($advancedOptions['partitions'])){
|
|
$this->createOrReplacePartition($table, $advancedOptions['partitions'], $indexes, $advancedOptions);
|
|
}
|
|
|
|
//Lastly, clustering goes here:
|
|
if($advancedOptions && isset($advancedOptions['cluster'])){
|
|
$this->query("CLUSTER \"$table\" USING \"{$advancedOptions['cluster']}\";");
|
|
}
|
|
|
|
return $table;
|
|
}
|
|
|
|
/**
|
|
* Builds the internal Postgres index name given the silverstripe table and index name
|
|
*
|
|
* @param string $tableName
|
|
* @param string $indexName
|
|
* @param string $prefix The optional prefix for the index. Defaults to "ix" for indexes.
|
|
* @return string The postgres name of the index
|
|
*/
|
|
protected function buildPostgresIndexName($tableName, $indexName, $prefix = 'ix') {
|
|
|
|
// Assume all indexes also contain the table name
|
|
// MD5 the table/index name combo to keep it to a fixed length.
|
|
// Exclude the prefix so that the trigger name can be easily generated from the index name
|
|
$indexNamePG = "{$prefix}_" . md5("{$tableName}_{$indexName}");
|
|
|
|
// Limit to 63 characters
|
|
if (strlen($indexNamePG) > 63) {
|
|
return substr($indexNamePG, 0, 63);
|
|
} else {
|
|
return $indexNamePG;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Builds the internal Postgres trigger name given the silverstripe table and trigger name
|
|
*
|
|
* @param string $tableName
|
|
* @param string $triggerName
|
|
* @return string The postgres name of the trigger
|
|
*/
|
|
function buildPostgresTriggerName($tableName, $triggerName) {
|
|
// Kind of cheating, but behaves the same way as indexes
|
|
return $this->buildPostgresIndexName($tableName, $triggerName, 'ts');
|
|
}
|
|
|
|
public function alterTable($table, $newFields = null, $newIndexes = null, $alteredFields = null, $alteredIndexes = null, $alteredOptions = null, $advancedOptions = null) {
|
|
|
|
$alterList = array();
|
|
if($newFields) foreach($newFields as $fieldName => $fieldSpec) {
|
|
$alterList[] = "ADD \"$fieldName\" $fieldSpec";
|
|
}
|
|
|
|
if ($alteredFields) foreach ($alteredFields as $indexName => $indexSpec) {
|
|
$val = $this->alterTableAlterColumn($table, $indexName, $indexSpec);
|
|
if (!empty($val)) $alterList[] = $val;
|
|
}
|
|
|
|
//Do we need to do anything with the tablespaces?
|
|
if($alteredOptions && isset($advancedOptions['tablespace'])){
|
|
$this->createOrReplaceTablespace($advancedOptions['tablespace']['name'], $advancedOptions['tablespace']['location']);
|
|
$this->query("ALTER TABLE \"$table\" SET TABLESPACE {$advancedOptions['tablespace']['name']};");
|
|
}
|
|
|
|
//DB ABSTRACTION: we need to change the constraints to be a separate 'add' command,
|
|
//see http://www.postgresql.org/docs/8.1/static/sql-altertable.html
|
|
$alterIndexList = array();
|
|
//Pick up the altered indexes here:
|
|
$fieldList = $this->fieldList($table);
|
|
$fulltexts = false;
|
|
$drop_triggers = false;
|
|
$triggers = false;
|
|
if($alteredIndexes) foreach($alteredIndexes as $indexName=>$indexSpec) {
|
|
|
|
$indexSpec = $this->parseIndexSpec($indexName, $indexSpec);
|
|
$indexNamePG = $this->buildPostgresIndexName($table, $indexName);
|
|
|
|
if($indexSpec['type']=='fulltext') {
|
|
//For full text indexes, we need to drop the trigger, drop the index, AND drop the column
|
|
|
|
//Go and get the tsearch details:
|
|
$ts_details = $this->fulltext($indexSpec, $table, $indexName);
|
|
|
|
//Drop this column if it already exists:
|
|
|
|
//No IF EXISTS option is available for Postgres <9.0
|
|
if(array_key_exists($ts_details['ts_name'], $fieldList)){
|
|
$fulltexts.="ALTER TABLE \"{$table}\" DROP COLUMN \"{$ts_details['ts_name']}\";";
|
|
}
|
|
|
|
// We'll execute these later:
|
|
$triggerNamePG = $this->buildPostgresTriggerName($table, $indexName);
|
|
$drop_triggers.= "DROP TRIGGER IF EXISTS \"$triggerNamePG\" ON \"$table\";";
|
|
$fulltexts .= "ALTER TABLE \"{$table}\" ADD COLUMN {$ts_details['fulltexts']};";
|
|
$triggers .= $ts_details['triggers'];
|
|
}
|
|
|
|
// Create index action (including fulltext)
|
|
$alterIndexList[] = "DROP INDEX IF EXISTS \"$indexNamePG\";";
|
|
$createIndex = $this->getIndexSqlDefinition($table, $indexName, $indexSpec);
|
|
if($createIndex!==false) $alterIndexList[] = $createIndex;
|
|
}
|
|
|
|
//Add the new indexes:
|
|
if($newIndexes) foreach($newIndexes as $indexName => $indexSpec){
|
|
|
|
$indexSpec = $this->parseIndexSpec($indexName, $indexSpec);
|
|
$indexNamePG = $this->buildPostgresIndexName($table, $indexName);
|
|
//If we have a fulltext search request, then we need to create a special column
|
|
//for GiST searches
|
|
//Pick up the new indexes here:
|
|
if($indexSpec['type']=='fulltext') {
|
|
$ts_details=$this->fulltext($indexSpec, $table, $indexName);
|
|
if(!isset($fieldList[$ts_details['ts_name']])){
|
|
$fulltexts.="ALTER TABLE \"{$table}\" ADD COLUMN {$ts_details['fulltexts']};";
|
|
$triggers.=$ts_details['triggers'];
|
|
}
|
|
}
|
|
|
|
//Check that this index doesn't already exist:
|
|
$indexes=$this->indexList($table);
|
|
if(isset($indexes[$indexName])){
|
|
$alterIndexList[] = "DROP INDEX IF EXISTS \"$indexNamePG\";";
|
|
}
|
|
|
|
$createIndex=$this->getIndexSqlDefinition($table, $indexName, $indexSpec);
|
|
if($createIndex!==false)
|
|
$alterIndexList[] = $createIndex;
|
|
}
|
|
|
|
if($alterList) {
|
|
$alterations = implode(",\n", $alterList);
|
|
$this->query("ALTER TABLE \"$table\" " . $alterations);
|
|
}
|
|
|
|
//Do we need to create a tablespace for this item?
|
|
if($advancedOptions && isset($advancedOptions['extensions']['tablespace'])){
|
|
$extensions=$advancedOptions['extensions'];
|
|
$this->createOrReplaceTablespace($extensions['tablespace']['name'], $extensions['tablespace']['location']);
|
|
}
|
|
|
|
if($alteredOptions && isset($this->class) && isset($alteredOptions[$this->class])) {
|
|
$this->query(sprintf("ALTER TABLE \"%s\" %s", $table, $alteredOptions[$this->class]));
|
|
Database::alteration_message(
|
|
sprintf("Table %s options changed: %s", $table, $alteredOptions[$this->class]),
|
|
"changed"
|
|
);
|
|
}
|
|
|
|
//Create any fulltext columns and triggers here:
|
|
if($fulltexts) $this->query($fulltexts);
|
|
if($drop_triggers) $this->query($drop_triggers);
|
|
|
|
if($triggers) {
|
|
$this->query($triggers);
|
|
|
|
$triggerbits=explode(';', $triggers);
|
|
foreach($triggerbits as $trigger){
|
|
$trigger_fields=$this->triggerFieldsFromTrigger($trigger);
|
|
|
|
if($trigger_fields){
|
|
//We need to run a simple query to force the database to update the triggered columns
|
|
$this->query("UPDATE \"{$table}\" SET \"{$trigger_fields[0]}\"=\"$trigger_fields[0]\";");
|
|
}
|
|
}
|
|
}
|
|
|
|
foreach($alterIndexList as $alteration) $this->query($alteration);
|
|
|
|
//If we have a partitioning requirement, we do that here:
|
|
if($advancedOptions && isset($advancedOptions['partitions'])){
|
|
$this->createOrReplacePartition($table, $advancedOptions['partitions']);
|
|
}
|
|
|
|
//Lastly, clustering goes here:
|
|
if ($advancedOptions && isset($advancedOptions['cluster'])) {
|
|
$clusterIndex = $this->buildPostgresIndexName($table, $advancedOptions['cluster']);
|
|
$this->query("CLUSTER \"$table\" USING \"$clusterIndex\";");
|
|
} else {
|
|
//Check that clustering is not on this table, and if it is, remove it:
|
|
|
|
//This is really annoying. We need the oid of this table:
|
|
$stats = $this->preparedQuery(
|
|
"SELECT relid FROM pg_stat_user_tables WHERE relname = ?;",
|
|
array($table)
|
|
)->first();
|
|
$oid=$stats['relid'];
|
|
|
|
//Now we can run a long query to get the clustered status:
|
|
//If anyone knows a better way to get the clustered status, then feel free to replace this!
|
|
$clustered = $this->preparedQuery("
|
|
SELECT c2.relname, i.indisclustered
|
|
FROM pg_catalog.pg_class c, pg_catalog.pg_class c2, pg_catalog.pg_index i
|
|
WHERE c.oid = ? AND c.oid = i.indrelid AND i.indexrelid = c2.oid AND indisclustered='t';",
|
|
array($oid)
|
|
)->first();
|
|
|
|
if($clustered) {
|
|
$this->query("ALTER TABLE \"$table\" SET WITHOUT CLUSTER;");
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Creates an ALTER expression for a column in PostgreSQL
|
|
*
|
|
* @param $tableName Name of the table to be altered
|
|
* @param $colName Name of the column to be altered
|
|
* @param $colSpec String which contains conditions for a column
|
|
* @return string
|
|
*/
|
|
private function alterTableAlterColumn($tableName, $colName, $colSpec){
|
|
// First, we split the column specifications into parts
|
|
// TODO: this returns an empty array for the following string: int(11) not null auto_increment
|
|
// on second thoughts, why is an auto_increment field being passed through?
|
|
|
|
$pattern = '/^([\w()]+)\s?((?:not\s)?null)?\s?(default\s[\w\']+)?\s?(check\s[\w()\'",\s]+)?$/i';
|
|
preg_match($pattern, $colSpec, $matches);
|
|
|
|
if(sizeof($matches)==0) return '';
|
|
|
|
if($matches[1]=='serial8') return '';
|
|
|
|
if(isset($matches[1])) {
|
|
$alterCol = "ALTER COLUMN \"$colName\" TYPE $matches[1]\n";
|
|
|
|
// SET null / not null
|
|
if(!empty($matches[2])) {
|
|
$alterCol .= ",\nALTER COLUMN \"$colName\" SET $matches[2]";
|
|
}
|
|
|
|
// SET default (we drop it first, for reasons of precaution)
|
|
if(!empty($matches[3])) {
|
|
$alterCol .= ",\nALTER COLUMN \"$colName\" DROP DEFAULT";
|
|
$alterCol .= ",\nALTER COLUMN \"$colName\" SET $matches[3]";
|
|
}
|
|
|
|
// SET check constraint (The constraint HAS to be dropped)
|
|
$existing_constraint=$this->query("SELECT conname FROM pg_constraint WHERE conname='{$tableName}_{$colName}_check';")->value();
|
|
if(isset($matches[4])) {
|
|
//Take this new constraint and see what's outstanding from the target table:
|
|
$constraint_bits=explode('(', $matches[4]);
|
|
$constraint_values=trim($constraint_bits[2], ')');
|
|
$constraint_values_bits=explode(',', $constraint_values);
|
|
$default=trim($constraint_values_bits[0], " '");
|
|
|
|
//Now go and convert anything that's not in this list to 'Page'
|
|
//We have to run this as a query, not as part of the alteration queries due to the way they are constructed.
|
|
$updateConstraint='';
|
|
$updateConstraint.="UPDATE \"{$tableName}\" SET \"$colName\"='$default' WHERE \"$colName\" NOT IN ($constraint_values);";
|
|
if($this->hasTable("{$tableName}_Live")) {
|
|
$updateConstraint.="UPDATE \"{$tableName}_Live\" SET \"$colName\"='$default' WHERE \"$colName\" NOT IN ($constraint_values);";
|
|
}
|
|
if($this->hasTable("{$tableName}_versions")) {
|
|
$updateConstraint.="UPDATE \"{$tableName}_versions\" SET \"$colName\"='$default' WHERE \"$colName\" NOT IN ($constraint_values);";
|
|
}
|
|
|
|
$this->query($updateConstraint);
|
|
}
|
|
|
|
//First, delete any existing constraint on this column, even if it's no longer an enum
|
|
if($existing_constraint) {
|
|
$alterCol .= ",\nDROP CONSTRAINT \"{$tableName}_{$colName}_check\"";
|
|
}
|
|
|
|
//Now create the constraint (if we've asked for one)
|
|
if(!empty($matches[4])) {
|
|
$alterCol .= ",\nADD CONSTRAINT \"{$tableName}_{$colName}_check\" $matches[4]";
|
|
}
|
|
}
|
|
|
|
return isset($alterCol) ? $alterCol : '';
|
|
}
|
|
|
|
public function renameTable($oldTableName, $newTableName) {
|
|
$this->query("ALTER TABLE \"$oldTableName\" RENAME TO \"$newTableName\"");
|
|
unset(self::$cached_fieldlists[$oldTableName]);
|
|
}
|
|
|
|
public function checkAndRepairTable($tableName) {
|
|
$this->query("VACUUM FULL ANALYZE \"$tableName\"");
|
|
$this->query("REINDEX TABLE \"$tableName\"");
|
|
return true;
|
|
}
|
|
|
|
public function createField($table, $field, $spec) {
|
|
$this->query("ALTER TABLE \"$table\" ADD \"$field\" $spec");
|
|
}
|
|
|
|
/**
|
|
* Change the database type of the given field.
|
|
*
|
|
* @param string $tableName The name of the tbale the field is in.
|
|
* @param string $fieldName The name of the field to change.
|
|
* @param string $fieldSpec The new field specification
|
|
*/
|
|
public function alterField($tableName, $fieldName, $fieldSpec) {
|
|
$this->query("ALTER TABLE \"$tableName\" CHANGE \"$fieldName\" \"$fieldName\" $fieldSpec");
|
|
}
|
|
|
|
public function renameField($tableName, $oldName, $newName) {
|
|
$fieldList = $this->fieldList($tableName);
|
|
if(array_key_exists($oldName, $fieldList)) {
|
|
$this->query("ALTER TABLE \"$tableName\" RENAME COLUMN \"$oldName\" TO \"$newName\"");
|
|
|
|
//Remove this from the cached list:
|
|
unset(self::$cached_fieldlists[$tableName]);
|
|
}
|
|
}
|
|
|
|
public function fieldList($table) {
|
|
//Query from http://www.alberton.info/postgresql_meta_info.html
|
|
//This gets us more information than we need, but I've included it all for the moment....
|
|
|
|
//if(!isset(self::$cached_fieldlists[$table])){
|
|
$fields = $this->preparedQuery("
|
|
SELECT ordinal_position, column_name, data_type, column_default,
|
|
is_nullable, character_maximum_length, numeric_precision, numeric_scale
|
|
FROM information_schema.columns WHERE table_name = ? and table_schema = ?
|
|
ORDER BY ordinal_position;",
|
|
array($table, $this->database->currentSchema())
|
|
);
|
|
|
|
$output = array();
|
|
if($fields) foreach($fields as $field) {
|
|
|
|
switch($field['data_type']){
|
|
case 'character varying':
|
|
//Check to see if there's a constraint attached to this column:
|
|
//$constraint=$this->query("SELECT conname,pg_catalog.pg_get_constraintdef(r.oid, true) FROM pg_catalog.pg_constraint r WHERE r.contype = 'c' AND conname='" . $table . '_' . $field['column_name'] . "_check' ORDER BY 1;")->first();
|
|
$constraint = $this->constraintExists($table . '_' . $field['column_name'] . '_check');
|
|
if($constraint){
|
|
//Now we need to break this constraint text into bits so we can see what we have:
|
|
//Examples:
|
|
//CHECK ("CanEditType"::text = ANY (ARRAY['LoggedInUsers'::character varying, 'OnlyTheseUsers'::character varying, 'Inherit'::character varying]::text[]))
|
|
//CHECK ("ClassName"::text = 'PageComment'::text)
|
|
|
|
//TODO: replace all this with a regular expression!
|
|
$value=$constraint['pg_get_constraintdef'];
|
|
$value=substr($value, strpos($value,'='));
|
|
$value=str_replace("''", "'", $value);
|
|
|
|
$in_value=false;
|
|
$constraints=Array();
|
|
$current_value='';
|
|
for($i=0; $i<strlen($value); $i++){
|
|
$char=substr($value, $i, 1);
|
|
if($in_value)
|
|
$current_value.=$char;
|
|
|
|
if($char=="'"){
|
|
if(!$in_value)
|
|
$in_value=true;
|
|
else {
|
|
$in_value=false;
|
|
$constraints[]=substr($current_value, 0, -1);
|
|
$current_value='';
|
|
}
|
|
}
|
|
}
|
|
|
|
if(sizeof($constraints)>0){
|
|
//Get the default:
|
|
$default=trim(substr($field['column_default'], 0, strpos($field['column_default'], '::')), "'");
|
|
$output[$field['column_name']]=$this->enum(Array('default'=>$default, 'name'=>$field['column_name'], 'enums'=>$constraints));
|
|
}
|
|
} else{
|
|
$output[$field['column_name']]='varchar(' . $field['character_maximum_length'] . ')';
|
|
}
|
|
break;
|
|
|
|
case 'numeric':
|
|
$output[$field['column_name']]='decimal(' . $field['numeric_precision'] . ',' . $field['numeric_scale'] . ') default ' . (int)$field['column_default'];
|
|
break;
|
|
|
|
case 'integer':
|
|
$output[$field['column_name']]='integer default ' . (int)$field['column_default'];
|
|
break;
|
|
|
|
case 'timestamp without time zone':
|
|
$output[$field['column_name']]='timestamp';
|
|
break;
|
|
|
|
case 'smallint':
|
|
$output[$field['column_name']]='smallint default ' . (int)$field['column_default'];
|
|
break;
|
|
|
|
case 'time without time zone':
|
|
$output[$field['column_name']]='time';
|
|
break;
|
|
|
|
case 'double precision':
|
|
$output[$field['column_name']]='float';
|
|
break;
|
|
|
|
default:
|
|
$output[$field['column_name']] = $field;
|
|
}
|
|
|
|
}
|
|
|
|
// self::$cached_fieldlists[$table]=$output;
|
|
//}
|
|
|
|
//return self::$cached_fieldlists[$table];
|
|
|
|
return $output;
|
|
}
|
|
|
|
function clearCachedFieldlist($tableName=false){
|
|
if($tableName) unset(self::$cached_fieldlists[$tableName]);
|
|
else self::$cached_fieldlists=array();
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Create an index on a table.
|
|
*
|
|
* @param string $tableName The name of the table.
|
|
* @param string $indexName The name of the index.
|
|
* @param string $indexSpec The specification of the index, see Database::requireIndex() for more details.
|
|
*/
|
|
public function createIndex($tableName, $indexName, $indexSpec) {
|
|
$createIndex = $this->getIndexSqlDefinition($tableName, $indexName, $indexSpec);
|
|
if($createIndex !== false) $this->query($createIndex);
|
|
}
|
|
|
|
/*
|
|
* @todo - factor out? Is DBSchemaManager::convertIndexSpec sufficient?
|
|
public function convertIndexSpec($indexSpec, $asDbValue=false, $table=''){
|
|
|
|
if(!$asDbValue){
|
|
if(is_array($indexSpec)){
|
|
//Here we create a db-specific version of whatever index we need to create.
|
|
switch($indexSpec['type']){
|
|
case 'fulltext':
|
|
$indexSpec='fulltext (' . $indexSpec['value'] . ')';
|
|
break;
|
|
case 'unique':
|
|
$indexSpec='unique (' . $indexSpec['value'] . ')';
|
|
break;
|
|
case 'hash':
|
|
$indexSpec='using hash (' . $indexSpec['value'] . ')';
|
|
break;
|
|
case 'index':
|
|
//The default index is 'btree', which we'll use by default (below):
|
|
default:
|
|
$indexSpec='using btree (' . $indexSpec['value'] . ')';
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
$indexSpec = $this->buildPostgresIndexName($table, $indexSpec);
|
|
}
|
|
return $indexSpec;
|
|
}*/
|
|
|
|
protected function getIndexSqlDefinition($tableName, $indexName, $indexSpec, $asDbValue=false) {
|
|
|
|
//TODO: create table partition support
|
|
//TODO: create clustering options
|
|
|
|
//NOTE: it is possible for *_renamed tables to have indexes whose names are not updates
|
|
//Therefore, we now check for the existance of indexes before we create them.
|
|
//This is techically a bug, since new tables will not be indexed.
|
|
|
|
// If requesting the definition rather than the DDL
|
|
if($asDbValue) {
|
|
$indexName=trim($indexName, '()');
|
|
return $indexName;
|
|
}
|
|
|
|
// Determine index name
|
|
$tableCol = $this->buildPostgresIndexName($tableName, $indexName);
|
|
|
|
// Consolidate/Cleanup spec into array format
|
|
$indexSpec = $this->parseIndexSpec($indexName, $indexSpec);
|
|
|
|
//Misc options first:
|
|
$fillfactor = $where = '';
|
|
if (isset($indexSpec['fillfactor'])) {
|
|
$fillfactor = 'WITH (FILLFACTOR = ' . $indexSpec['fillfactor'] . ')';
|
|
}
|
|
if (isset($indexSpec['where'])) {
|
|
$where = 'WHERE ' . $indexSpec['where'];
|
|
}
|
|
|
|
//create a type-specific index
|
|
// NOTE: hash should be removed. This is only here to demonstrate how other indexes can be made
|
|
// NOTE: Quote the index name to preserve case sensitivity
|
|
switch ($indexSpec['type']) {
|
|
case 'fulltext':
|
|
// @see fulltext() for the definition of the trigger that ts_$IndexName uses for fulltext searching
|
|
$clusterMethod = PostgreSQLDatabase::default_fts_cluster_method();
|
|
$spec = "create index \"$tableCol\" ON \"$tableName\" USING $clusterMethod(\"ts_" . $indexName . "\") $fillfactor $where";
|
|
break;
|
|
|
|
case 'unique':
|
|
$spec = "create unique index \"$tableCol\" ON \"$tableName\" (" . $indexSpec['value'] . ") $fillfactor $where";
|
|
break;
|
|
|
|
case 'btree':
|
|
$spec = "create index \"$tableCol\" ON \"$tableName\" USING btree (" . $indexSpec['value'] . ") $fillfactor $where";
|
|
break;
|
|
|
|
case 'hash':
|
|
//NOTE: this is not a recommended index type
|
|
$spec = "create index \"$tableCol\" ON \"$tableName\" USING hash (" . $indexSpec['value'] . ") $fillfactor $where";
|
|
break;
|
|
|
|
case 'index':
|
|
//'index' is the same as default, just a normal index with the default type decided by the database.
|
|
default:
|
|
$spec = "create index \"$tableCol\" ON \"$tableName\" (" . $indexSpec['value'] . ") $fillfactor $where";
|
|
}
|
|
return trim($spec) . ';';
|
|
}
|
|
|
|
public function alterIndex($tableName, $indexName, $indexSpec) {
|
|
$indexSpec = trim($indexSpec);
|
|
if($indexSpec[0] != '(') {
|
|
list($indexType, $indexFields) = explode(' ',$indexSpec,2);
|
|
} else {
|
|
$indexFields = $indexSpec;
|
|
}
|
|
|
|
if(!$indexType) {
|
|
$indexType = "index";
|
|
}
|
|
|
|
$this->query("DROP INDEX \"$indexName\"");
|
|
$this->query("ALTER TABLE \"$tableName\" ADD $indexType \"$indexName\" $indexFields");
|
|
}
|
|
|
|
/**
|
|
* Given a trigger name attempt to determine the columns upon which it acts
|
|
*
|
|
* @param string $triggerName Postgres trigger name
|
|
* @return array List of columns
|
|
*/
|
|
protected function extractTriggerColumns($triggerName) {
|
|
$trigger = $this->preparedQuery(
|
|
"SELECT tgargs FROM pg_catalog.pg_trigger WHERE tgname = ?",
|
|
array($triggerName)
|
|
)->first();
|
|
|
|
// Option 1: output as a string
|
|
if(strpos($trigger['tgargs'],'\000') !== false) {
|
|
$argList = explode('\000', $trigger['tgargs']);
|
|
array_pop($argList);
|
|
|
|
// Option 2: hex-encoded (not sure why this happens, depends on PGSQL config)
|
|
} else {
|
|
$bytes = str_split($trigger['tgargs'],2);
|
|
$argList = array();
|
|
$nextArg = "";
|
|
foreach($bytes as $byte) {
|
|
if($byte == "00") {
|
|
$argList[] = $nextArg;
|
|
$nextArg = "";
|
|
} else {
|
|
$nextArg .= chr(hexdec($byte));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Drop first two arguments (trigger name and config name) and implode into nice list
|
|
return array_slice($argList, 2);
|
|
}
|
|
|
|
public function indexList($table) {
|
|
//Retrieve a list of indexes for the specified table
|
|
$indexes = $this->preparedQuery("
|
|
SELECT tablename, indexname, indexdef
|
|
FROM pg_catalog.pg_indexes
|
|
WHERE tablename = ? AND schemaname = ?;",
|
|
array($table, $this->database->currentSchema())
|
|
);
|
|
|
|
$indexList = array();
|
|
foreach($indexes as $index) {
|
|
// Key for the indexList array. Differs from other DB implementations, which is why
|
|
// requireIndex() needed to be overridden
|
|
$indexName = $index['indexname'];
|
|
|
|
//We don't actually need the entire created command, just a few bits:
|
|
$type = '';
|
|
|
|
//Check for uniques:
|
|
if(substr($index['indexdef'], 0, 13)=='CREATE UNIQUE') {
|
|
$type = 'unique';
|
|
}
|
|
|
|
//check for hashes, btrees etc:
|
|
if(strpos(strtolower($index['indexdef']), 'using hash ')!==false) {
|
|
$type = 'hash';
|
|
}
|
|
|
|
//TODO: Fix me: btree is the default index type:
|
|
//if(strpos(strtolower($index['indexdef']), 'using btree ')!==false)
|
|
// $prefix='using btree ';
|
|
|
|
if(strpos(strtolower($index['indexdef']), 'using rtree ')!==false) {
|
|
$type = 'rtree';
|
|
}
|
|
|
|
// For fulltext indexes we need to extract the columns from another source
|
|
if (stristr($index['indexdef'], 'using gin')) {
|
|
$type = 'fulltext';
|
|
// Extract trigger information from postgres
|
|
$triggerName = preg_replace('/^ix_/', 'ts_', $index['indexname']);
|
|
$columns = $this->extractTriggerColumns($triggerName);
|
|
$columnString = $this->implodeColumnList($columns);
|
|
} else {
|
|
$columnString = $this->quoteColumnSpecString($index['indexdef']);
|
|
}
|
|
|
|
$indexList[$indexName] = $this->parseIndexSpec($index, array(
|
|
'name' => $indexName, // Not the correct name in the PHP, as this will be a mangled postgres-unique code
|
|
'value' => $columnString,
|
|
'type' => $type
|
|
));
|
|
}
|
|
|
|
return $indexList;
|
|
|
|
}
|
|
|
|
public function tableList() {
|
|
$tables = array();
|
|
$result = $this->preparedQuery(
|
|
"SELECT tablename FROM pg_catalog.pg_tables WHERE schemaname = ? AND tablename NOT ILIKE 'pg\\\_%' AND tablename NOT ILIKE 'sql\\\_%'",
|
|
array($this->database->currentSchema())
|
|
);
|
|
foreach($result as $record) {
|
|
$table = reset($record);
|
|
$tables[strtolower($table)] = $table;
|
|
}
|
|
return $tables;
|
|
}
|
|
|
|
/**
|
|
* Find out what the constraint information is, given a constraint name.
|
|
* We also cache this result, so the next time we don't need to do a
|
|
* query all over again.
|
|
*
|
|
* @param string $constraint
|
|
*/
|
|
protected function constraintExists($constraint){
|
|
if(!isset(self::$cached_constraints[$constraint])){
|
|
$exists = $this->preparedQuery("
|
|
SELECT conname,pg_catalog.pg_get_constraintdef(r.oid, true)
|
|
FROM pg_catalog.pg_constraint r WHERE r.contype = 'c' AND conname = ? ORDER BY 1;",
|
|
array($constraint)
|
|
)->first();
|
|
self::$cached_constraints[$constraint]=$exists;
|
|
}
|
|
|
|
return self::$cached_constraints[$constraint];
|
|
}
|
|
|
|
/**
|
|
* A function to return the field names and datatypes for the particular table
|
|
*
|
|
* @param string $tableName
|
|
* @return array List of columns an an associative array with the keys Column and DataType
|
|
*/
|
|
public function tableDetails($tableName) {
|
|
$query = "SELECT a.attname as \"Column\", pg_catalog.format_type(a.atttypid, a.atttypmod) as \"Datatype\"
|
|
FROM pg_catalog.pg_attribute a
|
|
WHERE a.attnum > 0 AND NOT a.attisdropped AND a.attrelid = (
|
|
SELECT c.oid
|
|
FROM pg_catalog.pg_class c
|
|
LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
|
|
WHERE c.relname = ? AND pg_catalog.pg_table_is_visible(c.oid) AND n.nspname = ?
|
|
);";
|
|
|
|
$result = $this->preparedQuery($query, $tableName, $this->database->currentSchema());
|
|
|
|
$table = array();
|
|
while($row = pg_fetch_assoc($result)) {
|
|
$table[] = array(
|
|
'Column' => $row['Column'],
|
|
'DataType' => $row['DataType']
|
|
);
|
|
}
|
|
|
|
return $table;
|
|
}
|
|
|
|
/**
|
|
* Pass a legit trigger name and it will be dropped
|
|
* This assumes that the trigger has been named in a unique fashion
|
|
*
|
|
* @param string $triggerName Name of the trigger
|
|
* @param string $tableName Name of the table
|
|
*/
|
|
protected function dropTrigger($triggerName, $tableName){
|
|
$exists = $this->preparedQuery("
|
|
SELECT trigger_name
|
|
FROM information_schema.triggers
|
|
WHERE trigger_name = ? AND trigger_schema = ?;",
|
|
array($triggerName, $this->database->currentSchema())
|
|
)->first();
|
|
if($exists){
|
|
$this->query("DROP trigger IF EXISTS $triggerName ON \"$tableName\";");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This will return the fields that the trigger is monitoring
|
|
*
|
|
* @param string $trigger Name of the trigger
|
|
* @return array
|
|
*/
|
|
protected function triggerFieldsFromTrigger($trigger) {
|
|
if($trigger){
|
|
$tsvector='tsvector_update_trigger';
|
|
$ts_pos=strpos($trigger, $tsvector);
|
|
$details=trim(substr($trigger, $ts_pos+strlen($tsvector)), '();');
|
|
//Now split this into bits:
|
|
$bits=explode(',', $details);
|
|
|
|
$fields=$bits[2];
|
|
|
|
$field_bits=explode(',', str_replace('"', '', $fields));
|
|
$result=array();
|
|
foreach($field_bits as $field_bit)
|
|
$result[]=trim($field_bit);
|
|
|
|
return $result;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a boolean type-formatted string
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @param boolean $asDbValue
|
|
* @return string
|
|
*/
|
|
public function boolean($values, $asDbValue=false){
|
|
//Annoyingly, we need to do a good ol' fashioned switch here:
|
|
$default = $values['default'] ? '1' : '0';
|
|
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue']='';
|
|
}
|
|
|
|
if($asDbValue) {
|
|
return array('data_type'=>'smallint');
|
|
}
|
|
|
|
if($values['arrayValue'] != '') {
|
|
$default = '';
|
|
} else {
|
|
$default = ' default ' . (int)$values['default'];
|
|
}
|
|
return "smallint{$values['arrayValue']}" . $default;
|
|
}
|
|
|
|
/**
|
|
* Return a date type-formatted string
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function date($values){
|
|
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue']='';
|
|
}
|
|
|
|
return "date{$values['arrayValue']}";
|
|
}
|
|
|
|
/**
|
|
* Return a decimal type-formatted string
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @param boolean $asDbValue
|
|
* @return string
|
|
*/
|
|
public function decimal($values, $asDbValue=false){
|
|
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue']='';
|
|
}
|
|
|
|
// Avoid empty strings being put in the db
|
|
if($values['precision'] == '') {
|
|
$precision = 1;
|
|
} else {
|
|
$precision = $values['precision'];
|
|
}
|
|
|
|
$defaultValue = '';
|
|
if(isset($values['default']) && is_numeric($values['default'])) {
|
|
$defaultValue = ' default ' . $values['default'];
|
|
}
|
|
|
|
if($asDbValue) {
|
|
return array('data_type' => 'numeric', 'precision' => $precision);
|
|
} else {
|
|
return "decimal($precision){$values['arrayValue']}$defaultValue";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a enum type-formatted string
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function enum($values){
|
|
//Enums are a bit different. We'll be creating a varchar(255) with a constraint of all the usual enum options.
|
|
//NOTE: In this one instance, we are including the table name in the values array
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue']='';
|
|
}
|
|
|
|
if($values['arrayValue']!='') {
|
|
$default = '';
|
|
} else {
|
|
$default = " default '{$values['default']}'";
|
|
}
|
|
|
|
return "varchar(255){$values['arrayValue']}" . $default . " check (\"" . $values['name'] . "\" in ('" . implode('\', \'', $values['enums']) . "'))";
|
|
|
|
}
|
|
|
|
/**
|
|
* Return a float type-formatted string
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @param boolean $asDbValue
|
|
* @return string
|
|
*/
|
|
public function float($values, $asDbValue = false){
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue']='';
|
|
}
|
|
|
|
if($asDbValue) {
|
|
return array('data_type' => 'double precision');
|
|
} else {
|
|
return "float{$values['arrayValue']}";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a float type-formatted string cause double is not supported
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @param boolean $asDbValue
|
|
* @return string
|
|
*/
|
|
public function double($values, $asDbValue=false){
|
|
return $this->float($values, $asDbValue);
|
|
}
|
|
|
|
/**
|
|
* Return a int type-formatted string
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @param boolean $asDbValue
|
|
* @return string
|
|
*/
|
|
public function int($values, $asDbValue = false){
|
|
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue']='';
|
|
}
|
|
|
|
if($asDbValue) {
|
|
return Array('data_type'=>'integer', 'precision'=>'32');
|
|
}
|
|
|
|
if($values['arrayValue']!='') {
|
|
$default='';
|
|
} else {
|
|
$default=' default ' . (int)$values['default'];
|
|
}
|
|
|
|
return "integer{$values['arrayValue']}" . $default;
|
|
}
|
|
|
|
/**
|
|
* Return a bigint type-formatted string
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @param boolean $asDbValue
|
|
* @return string
|
|
*/
|
|
public function bigint($values, $asDbValue = false){
|
|
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue']='';
|
|
}
|
|
|
|
if($asDbValue) {
|
|
return Array('data_type'=>'bigint', 'precision'=>'64');
|
|
}
|
|
|
|
if($values['arrayValue']!='') {
|
|
$default='';
|
|
} else {
|
|
$default=' default ' . (int)$values['default'];
|
|
}
|
|
|
|
return "bigint{$values['arrayValue']}" . $default;
|
|
}
|
|
|
|
/**
|
|
* Return a datetime type-formatted string
|
|
* For PostgreSQL, we simply return the word 'timestamp', no other parameters are necessary
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @param boolean $asDbValue
|
|
* @return string
|
|
*/
|
|
public function SS_Datetime($values, $asDbValue = false){
|
|
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue']='';
|
|
}
|
|
|
|
if($asDbValue) {
|
|
return array('data_type'=>'timestamp without time zone');
|
|
} else {
|
|
return "timestamp{$values['arrayValue']}";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a text type-formatted string
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @param boolean $asDbValue
|
|
* @return string
|
|
*/
|
|
public function text($values, $asDbValue = false){
|
|
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue'] = '';
|
|
}
|
|
|
|
if($asDbValue) {
|
|
return array('data_type'=>'text');
|
|
} else {
|
|
return "text{$values['arrayValue']}";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a time type-formatted string
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function time($values){
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue'] = '';
|
|
}
|
|
|
|
return "time{$values['arrayValue']}";
|
|
}
|
|
|
|
/**
|
|
* Return a varchar type-formatted string
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @param boolean $asDbValue
|
|
* @return string
|
|
*/
|
|
public function varchar($values, $asDbValue=false){
|
|
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue'] = '';
|
|
}
|
|
|
|
if(!isset($values['precision'])) {
|
|
$values['precision'] = 255;
|
|
}
|
|
|
|
if($asDbValue) {
|
|
return array('data_type'=>'varchar', 'precision'=>$values['precision']);
|
|
} else {
|
|
return "varchar({$values['precision']}){$values['arrayValue']}";
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return a 4 digit numeric type. MySQL has a proprietary 'Year' type.
|
|
* For Postgres, we'll use a 4 digit numeric
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @param boolean $asDbValue
|
|
* @return string
|
|
*/
|
|
public function year($values, $asDbValue = false){
|
|
|
|
if(!isset($values['arrayValue'])) {
|
|
$values['arrayValue'] = '';
|
|
}
|
|
|
|
//TODO: the DbValue result does not include the numeric_scale option (ie, the ,0 value in 4,0)
|
|
if($asDbValue) {
|
|
return array('data_type'=>'decimal', 'precision'=>'4');
|
|
} else {
|
|
return "decimal(4,0){$values['arrayValue']}";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create a fulltext search datatype for PostgreSQL
|
|
* This will also return a trigger to be applied to this table
|
|
*
|
|
* @todo: create custom functions to allow weighted searches
|
|
*
|
|
* @param array $this_index Index specification for the fulltext index
|
|
* @param string $tableName
|
|
* @param string $name
|
|
* @param array $spec
|
|
*/
|
|
protected function fulltext($this_index, $tableName, $name){
|
|
//For full text search, we need to create a column for the index
|
|
$columns = $this->quoteColumnSpecString($this_index['value']);
|
|
|
|
$fulltexts = "\"ts_$name\" tsvector";
|
|
$triggerName = $this->buildPostgresTriggerName($tableName, $name);
|
|
$language = PostgreSQLDatabase::search_language();
|
|
|
|
$this->dropTrigger($triggerName, $tableName);
|
|
$triggers = "CREATE TRIGGER \"$triggerName\" BEFORE INSERT OR UPDATE
|
|
ON \"$tableName\" FOR EACH ROW EXECUTE PROCEDURE
|
|
tsvector_update_trigger(\"ts_$name\", 'pg_catalog.$language', $columns);";
|
|
|
|
return array(
|
|
'name' => $name,
|
|
'ts_name' => "ts_{$name}",
|
|
'fulltexts' => $fulltexts,
|
|
'triggers' => $triggers
|
|
);
|
|
}
|
|
|
|
public function IdColumn($asDbValue = false, $hasAutoIncPK = true){
|
|
if($asDbValue) return 'bigint';
|
|
else return 'serial8 not null';
|
|
}
|
|
|
|
public function hasTable($tableName) {
|
|
$result = $this->preparedQuery(
|
|
"SELECT tablename FROM pg_catalog.pg_tables WHERE schemaname = ? AND tablename = ?;",
|
|
array($this->database->currentSchema(), $tableName)
|
|
);
|
|
return ($result->numRecords() > 0);
|
|
}
|
|
|
|
/**
|
|
* Returns the values of the given enum field
|
|
*
|
|
* @todo Make a proper implementation
|
|
*
|
|
* @param string $tableName Name of table to check
|
|
* @param string $fieldName name of enum field to check
|
|
* @return array List of enum values
|
|
*/
|
|
public function enumValuesForField($tableName, $fieldName) {
|
|
//return array('SiteTree','Page');
|
|
$constraints = $this->constraintExists("{$tableName}_{$fieldName}_check");
|
|
if($constraints) {
|
|
return $this->enumValuesFromConstraint($constraints['pg_get_constraintdef']);
|
|
} else {
|
|
return array();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the actual enum fields from the constraint value:
|
|
*
|
|
* @param string $constraint
|
|
* @return array
|
|
*/
|
|
protected function enumValuesFromConstraint($constraint){
|
|
$constraint = substr($constraint, strpos($constraint, 'ANY (ARRAY[')+11);
|
|
$constraint = substr($constraint, 0, -11);
|
|
$constraints = array();
|
|
$segments = explode(',', $constraint);
|
|
foreach($segments as $this_segment){
|
|
$bits = preg_split('/ *:: */', $this_segment);
|
|
array_unshift($constraints, trim($bits[0], " '"));
|
|
}
|
|
return $constraints;
|
|
}
|
|
|
|
public function dbDataType($type){
|
|
$values = array(
|
|
'unsigned integer' => 'INT'
|
|
);
|
|
|
|
if(isset($values[$type])) return $values[$type];
|
|
else return '';
|
|
}
|
|
|
|
/*
|
|
* Given a tablespace and and location, either create a new one
|
|
* or update the existing one
|
|
*
|
|
* @param string $name
|
|
* @param string $location
|
|
*/
|
|
public function createOrReplaceTablespace($name, $location){
|
|
$existing = $this->preparedQuery(
|
|
"SELECT spcname, spclocation FROM pg_tablespace WHERE spcname = ?;",
|
|
array($name)
|
|
)->first();
|
|
|
|
//NOTE: this location must be empty for this to work
|
|
//We can't seem to change the location of the tablespace through any ALTER commands :(
|
|
|
|
//If a tablespace with this name exists, but the location has changed, then drop the current one
|
|
//if($existing && $location!=$existing['spclocation'])
|
|
// DB::query("DROP TABLESPACE $name;");
|
|
|
|
//If this is a new tablespace, or we have dropped the current one:
|
|
if(!$existing || ($existing && $location != $existing['spclocation'])) {
|
|
$this->query("CREATE TABLESPACE $name LOCATION '$location';");
|
|
}
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param string $tableName
|
|
* @param array $partitions
|
|
* @param array $indexes
|
|
* @param array $extensions
|
|
*/
|
|
public function createOrReplacePartition($tableName, $partitions, $indexes, $extensions){
|
|
|
|
//We need the plpgsql language to be installed for this to work:
|
|
$this->createLanguage('plpgsql');
|
|
|
|
$trigger='CREATE OR REPLACE FUNCTION ' . $tableName . '_insert_trigger() RETURNS TRIGGER AS $$ BEGIN ';
|
|
$first=true;
|
|
|
|
//Do we need to create a tablespace for this item?
|
|
if($extensions && isset($extensions['tablespace'])){
|
|
$this->createOrReplaceTablespace($extensions['tablespace']['name'], $extensions['tablespace']['location']);
|
|
$tableSpace=' TABLESPACE ' . $extensions['tablespace']['name'];
|
|
} else {
|
|
$tableSpace='';
|
|
}
|
|
|
|
foreach($partitions as $partition_name => $partition_value){
|
|
//Check that this child table does not already exist:
|
|
if(!$this->hasTable($partition_name)){
|
|
$this->query("CREATE TABLE \"$partition_name\" (CHECK (" . str_replace('NEW.', '', $partition_value) . ")) INHERITS (\"$tableName\")$tableSpace;");
|
|
} else {
|
|
//Drop the constraint, we will recreate in in the next line
|
|
$existing_constraint = $this->preparedQuery(
|
|
"SELECT conname FROM pg_constraint WHERE conname = ?;",
|
|
array("{$partition_name}_pkey")
|
|
);
|
|
if($existing_constraint){
|
|
$this->query("ALTER TABLE \"$partition_name\" DROP CONSTRAINT \"{$partition_name}_pkey\";");
|
|
}
|
|
$this->dropTrigger(strtolower('trigger_' . $tableName . '_insert'), $tableName);
|
|
}
|
|
|
|
$this->query("ALTER TABLE \"$partition_name\" ADD CONSTRAINT \"{$partition_name}_pkey\" PRIMARY KEY (\"ID\");");
|
|
|
|
if($first){
|
|
$trigger.='IF';
|
|
$first=false;
|
|
} else {
|
|
$trigger.='ELSIF';
|
|
}
|
|
|
|
$trigger .= " ($partition_value) THEN INSERT INTO \"$partition_name\" VALUES (NEW.*);";
|
|
|
|
if($indexes){
|
|
// We need to propogate the indexes through to the child pages.
|
|
// Some of this code is duplicated, and could be tidied up
|
|
foreach($indexes as $name => $this_index){
|
|
|
|
if($this_index['type']=='fulltext'){
|
|
$fillfactor = $where = '';
|
|
if(isset($this_index['fillfactor'])) {
|
|
$fillfactor = 'WITH (FILLFACTOR = ' . $this_index['fillfactor'] . ')';
|
|
}
|
|
if(isset($this_index['where'])) {
|
|
$where = 'WHERE ' . $this_index['where'];
|
|
}
|
|
$clusterMethod = PostgreSQLDatabase::default_fts_cluster_method();
|
|
$this->query("CREATE INDEX \"" . $this->buildPostgresIndexName($partition_name, $this_index['name']) . "\" ON \"" . $partition_name . "\" USING $clusterMethod(\"ts_" . $name . "\") $fillfactor $where");
|
|
$ts_details = $this->fulltext($this_index, $partition_name, $name);
|
|
$this->query($ts_details['triggers']);
|
|
} else {
|
|
|
|
if(is_array($this_index)) {
|
|
$index_name = $this_index['name'];
|
|
} else {
|
|
$index_name = trim($this_index, '()');
|
|
}
|
|
|
|
$createIndex = $this->getIndexSqlDefinition($partition_name, $index_name, $this_index);
|
|
if($createIndex !== false) {
|
|
$this->query($createIndex);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//Lastly, clustering goes here:
|
|
if($extensions && isset($extensions['cluster'])){
|
|
$this->query("CLUSTER \"$partition_name\" USING \"{$extensions['cluster']}\";");
|
|
}
|
|
}
|
|
|
|
$trigger .= 'ELSE RAISE EXCEPTION \'Value id out of range. Fix the ' . $tableName . '_insert_trigger() function!\'; END IF; RETURN NULL; END; $$ LANGUAGE plpgsql;';
|
|
$trigger .= 'CREATE TRIGGER trigger_' . $tableName . '_insert BEFORE INSERT ON "' . $tableName . '" FOR EACH ROW EXECUTE PROCEDURE ' . $tableName . '_insert_trigger();';
|
|
|
|
$this->query($trigger);
|
|
}
|
|
|
|
/*
|
|
* This will create a language if it doesn't already exist.
|
|
* This is used by the createOrReplacePartition function, which needs plpgsql
|
|
*
|
|
* @param string $language Language name
|
|
*/
|
|
public function createLanguage($language){
|
|
$result = $this->preparedQuery(
|
|
"SELECT lanname FROM pg_language WHERE lanname = ?;",
|
|
array($language)
|
|
)->first();
|
|
|
|
if(!$result) {
|
|
$this->query("CREATE LANGUAGE $language;");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a set type-formatted string
|
|
* This is used for Multi-enum support, which isn't actually supported by Postgres.
|
|
* Throws a user error to show our lack of support, and return an "int", specifically for sapphire
|
|
* tests that test multi-enums. This results in a test failure, but not crashing the test run.
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function set($values){
|
|
user_error("PostGreSQL does not support multi-enum", E_USER_ERROR);
|
|
return "int";
|
|
}
|
|
}
|