mirror of
https://github.com/silverstripe/silverstripe-mssql
synced 2024-10-01 05:39:27 +02:00
857 lines
26 KiB
PHP
857 lines
26 KiB
PHP
<?php
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/**
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* Represents and handles all schema management for a MS SQL database
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*
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* @package mssql
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*/
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class MSSQLSchemaManager extends DBSchemaManager {
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/**
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* Stores per-request cached constraint checks that come from the database.
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*
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* @var array
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*/
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protected static $cached_checks = array();
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/**
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* Builds the internal MS SQL Server index name given the silverstripe table and index name
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*
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* @param string $tableName
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* @param string $indexName
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* @param string $prefix The optional prefix for the index. Defaults to "ix" for indexes.
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* @return string The name of the index
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*/
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function buildMSSQLIndexName($tableName, $indexName, $prefix = 'ix') {
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// Cleanup names of namespaced tables
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$tableName = str_replace('\\', '_', $tableName);
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$indexName = str_replace('\\', '_', $indexName);
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return "{$prefix}_{$tableName}_{$indexName}";
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}
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/**
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* This will set up the full text search capabilities.
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*
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* @param string $name Name of full text catalog to use
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*/
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function createFullTextCatalog($name = 'ftCatalog') {
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$result = $this->fullTextCatalogExists();
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if(!$result) $this->query("CREATE FULLTEXT CATALOG \"$name\" AS DEFAULT;");
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}
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/**
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* Check that a fulltext catalog has been created yet.
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*
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* @param string $name Name of full text catalog to use
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* @return boolean
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*/
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public function fullTextCatalogExists($name = 'ftCatalog') {
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return (bool) $this->preparedQuery(
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"SELECT name FROM sys.fulltext_catalogs WHERE name = ?;",
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array($name)
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)->value();
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}
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/**
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* Sleep until the catalog has been fully rebuilt. This is a busy wait designed for situations
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* when you need to be sure the index is up to date - for example in unit tests.
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*
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* TODO: move this to Database class? Can we assume this will be useful for all databases?
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* Also see the wrapper functions "waitUntilIndexingFinished" in SearchFormTest and TranslatableSearchFormTest
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*
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* @param int $maxWaitingTime Time in seconds to wait for the database.
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*/
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function waitUntilIndexingFinished($maxWaitingTime = 15) {
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if(!$this->database->fullTextEnabled()) return;
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$this->query("EXEC sp_fulltext_catalog 'ftCatalog', 'Rebuild';");
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// Busy wait until it's done updating, but no longer than 15 seconds.
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$start = time();
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while(time() - $start < $maxWaitingTime) {
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$status = $this->query("EXEC sp_help_fulltext_catalogs 'ftCatalog';")->first();
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if (isset($status['STATUS']) && $status['STATUS'] == 0) {
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// Idle!
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break;
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}
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sleep(1);
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}
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}
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/**
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* Check if a fulltext index exists on a particular table name.
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*
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* @param string $tableName
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* @return boolean TRUE index exists | FALSE index does not exist | NULL no support
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*/
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function fulltextIndexExists($tableName) {
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// Special case for no full text index support
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if(!$this->database->fullTextEnabled()) return null;
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return (bool) $this->preparedQuery("
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SELECT 1 FROM sys.fulltext_indexes i
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JOIN sys.objects o ON i.object_id = o.object_id
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WHERE o.name = ?",
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array($tableName)
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)->value();
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}
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/**
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* MSSQL stores the primary key column with an internal identifier,
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* so a lookup needs to be done to determine it.
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*
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* @param string $tableName Name of table with primary key column "ID"
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* @return string Internal identifier for primary key
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*/
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function getPrimaryKey($tableName){
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$indexes = $this->query("EXEC sp_helpindex '$tableName';");
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$indexName = '';
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foreach($indexes as $index) {
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if($index['index_keys'] == 'ID') {
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$indexName = $index['index_name'];
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break;
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}
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}
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return $indexName;
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}
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/**
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* Gets the identity column of a table
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*
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* @param string $tableName
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* @return string|null
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*/
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function getIdentityColumn($tableName) {
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return $this->preparedQuery("
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SELECT
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TABLE_NAME + '.' + COLUMN_NAME,
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TABLE_NAME
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FROM
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INFORMATION_SCHEMA.COLUMNS
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WHERE
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TABLE_SCHEMA = ? AND
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COLUMNPROPERTY(object_id(TABLE_NAME), COLUMN_NAME, 'IsIdentity') = 1 AND
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TABLE_NAME = ?
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", array('dbo', $tableName))->value();
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}
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public function createDatabase($name) {
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$this->query("CREATE DATABASE \"$name\"");
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}
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public function dropDatabase($name) {
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$this->query("DROP DATABASE \"$name\"");
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}
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public function databaseExists($name) {
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$databases = $this->databaseList();
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foreach($databases as $dbname) {
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if($dbname == $name) return true;
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}
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return false;
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}
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public function databaseList() {
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return $this->query('SELECT NAME FROM sys.sysdatabases')->column();
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}
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/**
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* Create a new table.
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* @param $tableName The name of the table
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* @param $fields A map of field names to field types
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* @param $indexes A map of indexes
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* @param $options An map of additional options. The available keys are as follows:
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* - 'MSSQLDatabase'/'MySQLDatabase'/'PostgreSQLDatabase' - database-specific options such as "engine" for MySQL.
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* - 'temporary' - If true, then a temporary table will be created
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* @return The table name generated. This may be different from the table name, for example with temporary tables.
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*/
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public function createTable($tableName, $fields = null, $indexes = null, $options = null, $advancedOptions = null) {
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$fieldSchemas = $indexSchemas = "";
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if($fields) foreach($fields as $k => $v) $fieldSchemas .= "\"$k\" $v,\n";
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// Temporary tables start with "#" in MSSQL-land
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if(!empty($options['temporary'])) {
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// Randomize the temp table name to avoid conflicts in the tempdb table which derived databases share
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$tableName = "#$tableName" . '-' . rand(1000000, 9999999);
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}
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$this->query("CREATE TABLE \"$tableName\" (
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$fieldSchemas
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primary key (\"ID\")
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);");
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//we need to generate indexes like this: CREATE INDEX IX_vault_to_export ON vault (to_export);
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//This needs to be done AFTER the table creation, so we can set up the fulltext indexes correctly
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if($indexes) foreach($indexes as $k => $v) {
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$indexSchemas .= $this->getIndexSqlDefinition($tableName, $k, $v) . "\n";
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}
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if($indexSchemas) $this->query($indexSchemas);
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return $tableName;
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}
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/**
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* Alter a table's schema.
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* @param $table The name of the table to alter
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* @param $newFields New fields, a map of field name => field schema
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* @param $newIndexes New indexes, a map of index name => index type
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* @param $alteredFields Updated fields, a map of field name => field schema
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* @param $alteredIndexes Updated indexes, a map of index name => index type
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*/
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public function alterTable($tableName, $newFields = null, $newIndexes = null, $alteredFields = null, $alteredIndexes = null, $alteredOptions=null, $advancedOptions=null) {
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$alterList = array();
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// drop any fulltext indexes that exist on the table before altering the structure
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if($this->fullTextIndexExists($tableName)) {
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$alterList[] = "\nDROP FULLTEXT INDEX ON \"$tableName\";";
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}
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if($newFields) foreach($newFields as $k => $v) $alterList[] = "ALTER TABLE \"$tableName\" ADD \"$k\" $v";
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if($alteredFields) foreach($alteredFields as $k => $v) $alterList[] = $this->alterTableAlterColumn($tableName, $k, $v);
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if($alteredIndexes) foreach($alteredIndexes as $k => $v) $alterList[] = $this->getIndexSqlDefinition($tableName, $k, $v);
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if($newIndexes) foreach($newIndexes as $k => $v) $alterList[] = $this->getIndexSqlDefinition($tableName, $k, $v);
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if($alterList) {
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foreach($alterList as $alteration) {
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if($alteration != '') {
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$this->query($alteration);
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}
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}
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}
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}
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/**
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* Given the table and column name, retrieve the constraint name for that column
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* in the table.
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*
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* @param string $tableName Table name column resides in
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* @param string $columnName Column name the constraint is for
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* @return string|null
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*/
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public function getConstraintName($tableName, $columnName) {
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return $this->preparedQuery("
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SELECT CONSTRAINT_NAME
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FROM INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE
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WHERE TABLE_NAME = ? AND COLUMN_NAME = ?",
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array($tableName, $columnName)
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)->value();
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}
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/**
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* Given a table and column name, return a check constraint clause for that column in
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* the table.
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*
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* This is an expensive query, so it is cached per-request and stored by table. The initial
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* call for a table that has not been cached will query all columns and store that
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* so subsequent calls are fast.
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*
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* @param string $tableName Table name column resides in
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* @param string $columnName Column name the constraint is for
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* @return string The check string
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*/
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public function getConstraintCheckClause($tableName, $columnName) {
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// Check already processed table columns
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if(isset(self::$cached_checks[$tableName])) {
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if(!isset(self::$cached_checks[$tableName][$columnName])) {
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return null;
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}
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return self::$cached_checks[$tableName][$columnName];
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}
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// Regenerate cehcks for this table
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$checks = array();
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foreach($this->preparedQuery("
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SELECT CAST(CHECK_CLAUSE AS TEXT) AS CHECK_CLAUSE, COLUMN_NAME
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FROM INFORMATION_SCHEMA.CHECK_CONSTRAINTS AS CC
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INNER JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE AS CCU ON CCU.CONSTRAINT_NAME = CC.CONSTRAINT_NAME
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WHERE TABLE_NAME = ?",
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array($tableName)
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) as $record) {
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$checks[$record['COLUMN_NAME']] = $record['CHECK_CLAUSE'];
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}
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self::$cached_checks[$tableName] = $checks;
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// Return via cached records
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return $this->getConstraintCheckClause($tableName, $columnName);
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}
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/**
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* Return the name of the default constraint applied to $tableName.$colName.
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* Will return null if no such constraint exists
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*
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* @param string $tableName Name of the table
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* @param string $colName Name of the column
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* @return string|null
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*/
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protected function defaultConstraintName($tableName, $colName) {
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return $this->preparedQuery("
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SELECT s.name --default name
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FROM sys.sysobjects s
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join sys.syscolumns c ON s.parent_obj = c.id
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WHERE s.xtype = 'd'
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and c.cdefault = s.id
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and parent_obj = OBJECT_ID(?)
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and c.name = ?",
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array($tableName, $colName)
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)->value();
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}
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/**
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* Get enum values from a constraint check clause.
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*
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* @param string $clause Check clause to parse values from
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* @return array Enum values
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*/
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protected function enumValuesFromCheckClause($clause) {
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$segments = preg_split('/ +OR *\[/i', $clause);
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$constraints = array();
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foreach($segments as $segment) {
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$bits = preg_split('/ *= */', $segment);
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for($i = 1; $i < sizeof($bits); $i += 2) {
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array_unshift($constraints, substr(rtrim($bits[$i], ')'), 1, -1));
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}
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}
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return $constraints;
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}
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/*
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* Creates an ALTER expression for a column in MS SQL
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*
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* @param string $tableName Name of the table to be altered
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* @param string $colName Name of the column to be altered
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* @param string $colSpec String which contains conditions for a column
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* @return string
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*/
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protected function alterTableAlterColumn($tableName, $colName, $colSpec){
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// First, we split the column specifications into parts
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// TODO: this returns an empty array for the following string: int(11) not null auto_increment
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// on second thoughts, why is an auto_increment field being passed through?
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$pattern = '/^(?<definition>[\w()]+)\s?(?<null>(?:not\s)?null)?\s?(?<default>default\s[\w\']+)?\s?(?<check>check\s?[\w()\'",\s]+)?$/i';
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$matches = array();
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preg_match($pattern, $colSpec, $matches);
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// drop the index if it exists
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$alterQueries = array();
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// drop *ALL* indexes on a table before proceeding
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// this won't drop primary keys, though
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$indexes = $this->indexNames($tableName);
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foreach($indexes as $indexName) {
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$alterQueries[] = "DROP INDEX \"$indexName\" ON \"$tableName\";";
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}
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$prefix = "ALTER TABLE \"$tableName\" ";
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// Remove the old default prior to adjusting the column.
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if($defaultConstraintName = $this->defaultConstraintName($tableName, $colName)) {
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$alterQueries[] = "$prefix DROP CONSTRAINT \"$defaultConstraintName\";";
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}
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if(isset($matches['definition'])) {
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//We will prevent any changes being made to the ID column. Primary key indexes will have a fit if we do anything here.
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if($colName != 'ID'){
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// SET null / not null
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$nullFragment = empty($matches['null']) ? '' : " {$matches['null']}";
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$alterQueries[] = "$prefix ALTER COLUMN \"$colName\" {$matches['definition']}$nullFragment;";
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// Add a default back
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if(!empty($matches['default'])) {
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$alterQueries[] = "$prefix ADD {$matches['default']} FOR \"$colName\";";
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}
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// SET check constraint (The constraint HAS to be dropped)
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if(!empty($matches['check'])) {
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$constraint = $this->getConstraintName($tableName, $colName);
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if($constraint) {
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$alterQueries[] = "$prefix DROP CONSTRAINT {$constraint};";
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}
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//NOTE: 'with nocheck' seems to solve a few problems I've been having for modifying existing tables.
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$alterQueries[] = "$prefix WITH NOCHECK ADD CONSTRAINT \"{$tableName}_{$colName}_check\" {$matches['check']};";
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}
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}
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}
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return implode("\n", $alterQueries);
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}
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public function renameTable($oldTableName, $newTableName) {
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$this->query("EXEC sp_rename \"$oldTableName\", \"$newTableName\"");
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}
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/**
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* Checks a table's integrity and repairs it if necessary.
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* NOTE: MSSQL does not appear to support any vacuum or optimise commands
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*
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* @var string $tableName The name of the table.
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* @return boolean Return true if the table has integrity after the method is complete.
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*/
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public function checkAndRepairTable($tableName) {
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return true;
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}
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public function createField($tableName, $fieldName, $fieldSpec) {
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$this->query("ALTER TABLE \"$tableName\" ADD \"$fieldName\" $fieldSpec");
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}
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/**
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* Change the database type of the given field.
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* @param string $tableName The name of the tbale the field is in.
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* @param string $fieldName The name of the field to change.
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* @param string $fieldSpec The new field specification
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*/
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public function alterField($tableName, $fieldName, $fieldSpec) {
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$this->query("ALTER TABLE \"$tableName\" CHANGE \"$fieldName\" \"$fieldName\" $fieldSpec");
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}
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public function renameField($tableName, $oldName, $newName) {
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$this->query("EXEC sp_rename @objname = '$tableName.$oldName', @newname = '$newName', @objtype = 'COLUMN'");
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}
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public function fieldList($table) {
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//This gets us more information than we need, but I've included it all for the moment....
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$fieldRecords = $this->preparedQuery("SELECT ordinal_position, column_name, data_type, column_default,
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is_nullable, character_maximum_length, numeric_precision, numeric_scale, collation_name
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FROM information_schema.columns WHERE table_name = ?
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ORDER BY ordinal_position;",
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array($table)
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);
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// Cache the records from the query - otherwise a lack of multiple active result sets
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// will cause subsequent queries to fail in this method
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$fields = array();
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$output = array();
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foreach($fieldRecords as $record) {
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$fields[] = $record;
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}
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foreach($fields as $field) {
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// Update the data_type field to be a complete column definition string for use by
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// SS_Database::requireField()
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switch($field['data_type']){
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case 'int':
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case 'bigint':
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case 'numeric':
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case 'float':
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case 'bit':
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if($field['data_type'] != 'bigint' && $field['data_type'] != 'int' && $sizeSuffix = $field['numeric_precision']) {
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$field['data_type'] .= "($sizeSuffix)";
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}
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if($field['is_nullable'] == 'YES') {
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$field['data_type'] .= ' null';
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} else {
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$field['data_type'] .= ' not null';
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}
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if($field['column_default']) {
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$default=substr($field['column_default'], 2, -2);
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$field['data_type'] .= " default $default";
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}
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break;
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case 'decimal':
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if($field['numeric_precision']) {
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$sizeSuffix = $field['numeric_precision'] . ',' . $field['numeric_scale'];
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$field['data_type'] .= "($sizeSuffix)";
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}
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if($field['is_nullable'] == 'YES') {
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$field['data_type'] .= ' null';
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} else {
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$field['data_type'] .= ' not null';
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}
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if($field['column_default']) {
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$default=substr($field['column_default'], 2, -2);
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$field['data_type'] .= " default $default";
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}
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break;
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case 'nvarchar':
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case 'varchar':
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//Check to see if there's a constraint attached to this column:
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$clause = $this->getConstraintCheckClause($table, $field['column_name']);
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if($clause) {
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$constraints = $this->enumValuesFromCheckClause($clause);
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$default=substr($field['column_default'], 2, -2);
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$field['data_type'] = $this->enum(array(
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'default' => $default,
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'name' => $field['column_name'],
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'enums' => $constraints,
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'table' => $table
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));
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break;
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}
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default:
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|
$sizeSuffix = $field['character_maximum_length'];
|
|
if($sizeSuffix == '-1') $sizeSuffix = 'max';
|
|
if($sizeSuffix) {
|
|
$field['data_type'] .= "($sizeSuffix)";
|
|
}
|
|
|
|
if($field['is_nullable'] == 'YES') {
|
|
$field['data_type'] .= ' null';
|
|
} else {
|
|
$field['data_type'] .= ' not null';
|
|
}
|
|
if($field['column_default']) {
|
|
$default=substr($field['column_default'], 2, -2);
|
|
$field['data_type'] .= " default '$default'";
|
|
}
|
|
}
|
|
$output[$field['column_name']] = $field;
|
|
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Create an index on a table.
|
|
* @param string $tableName The name of the table.
|
|
* @param string $indexName The name of the index.
|
|
* @param string $indexSpec The specification of the index, see SS_Database::requireIndex() for more details.
|
|
*/
|
|
public function createIndex($tableName, $indexName, $indexSpec) {
|
|
$this->query($this->getIndexSqlDefinition($tableName, $indexName, $indexSpec));
|
|
}
|
|
|
|
/**
|
|
* Return SQL for dropping and recreating an index
|
|
*
|
|
* @param string $tableName Name of table to create this index against
|
|
* @param string $indexName Name of this index
|
|
* @param array|string $indexSpec Index specification, either as a raw string
|
|
* or parsed array form
|
|
* @return string The SQL required to generate this index
|
|
*/
|
|
protected function getIndexSqlDefinition($tableName, $indexName, $indexSpec) {
|
|
|
|
// Determine index name
|
|
$index = $this->buildMSSQLIndexName($tableName, $indexName);
|
|
|
|
// Consolidate/Cleanup spec into array format
|
|
$indexSpec = $this->parseIndexSpec($indexName, $indexSpec);
|
|
|
|
$drop = "IF EXISTS (SELECT name FROM sys.indexes WHERE name = '$index') DROP INDEX $index ON \"$tableName\";";
|
|
|
|
// create a type-specific index
|
|
if($indexSpec['type'] == 'fulltext' && $this->database->fullTextEnabled()) {
|
|
// enable fulltext on this table
|
|
$this->createFullTextCatalog();
|
|
$primary_key = $this->getPrimaryKey($tableName);
|
|
|
|
if($primary_key) {
|
|
return "$drop CREATE FULLTEXT INDEX ON \"$tableName\" ({$indexSpec['value']})"
|
|
. "KEY INDEX $primary_key WITH CHANGE_TRACKING AUTO;";
|
|
}
|
|
}
|
|
|
|
if($indexSpec['type'] == 'unique') {
|
|
return "$drop CREATE UNIQUE INDEX $index ON \"$tableName\" ({$indexSpec['value']});";
|
|
}
|
|
|
|
return "$drop CREATE INDEX $index ON \"$tableName\" ({$indexSpec['value']});";
|
|
}
|
|
|
|
public function alterIndex($tableName, $indexName, $indexSpec) {
|
|
$this->createIndex($tableName, $indexName, $indexSpec);
|
|
}
|
|
|
|
/**
|
|
* Return the list of indexes in a table.
|
|
* @param string $table The table name.
|
|
* @return array
|
|
*/
|
|
public function indexList($table) {
|
|
$indexes = $this->query("EXEC sp_helpindex '$table';");
|
|
$indexList = array();
|
|
|
|
// Enumerate all basic indexes
|
|
foreach($indexes as $index) {
|
|
if(strpos($index['index_description'], 'unique') !== false) {
|
|
$indexType = 'unique ';
|
|
} else {
|
|
$indexType = 'index ';
|
|
}
|
|
|
|
// Extract name from index
|
|
$baseIndexName = $this->buildMSSQLIndexName($table, '');
|
|
$indexName = substr($index['index_name'], strlen($baseIndexName));
|
|
|
|
// Extract columns
|
|
$columns = $this->quoteColumnSpecString($index['index_keys']);
|
|
$indexList[$indexName] = $this->parseIndexSpec($indexName, array(
|
|
'name' => $indexName,
|
|
'value' => $columns,
|
|
'type' => $indexType
|
|
));
|
|
}
|
|
|
|
// Now we need to check to see if we have any fulltext indexes attached to this table:
|
|
if($this->database->fullTextEnabled()) {
|
|
$result = $this->query('EXEC sp_help_fulltext_columns;');
|
|
|
|
// Extract columns from this fulltext definition
|
|
$columns = array();
|
|
foreach($result as $row) {
|
|
if($row['TABLE_NAME'] == $table) {
|
|
$columns[] = $row['FULLTEXT_COLUMN_NAME'];
|
|
}
|
|
}
|
|
|
|
if(!empty($columns)) {
|
|
$indexList['SearchFields'] = $this->parseIndexSpec('SearchFields', array(
|
|
'name' => 'SearchFields',
|
|
'value' => $this->implodeColumnList($columns),
|
|
'type' => 'fulltext'
|
|
));
|
|
}
|
|
}
|
|
|
|
return $indexList;
|
|
}
|
|
|
|
/**
|
|
* For a given table name, get all the internal index names,
|
|
* except for those that are primary keys and fulltext indexes.
|
|
*
|
|
* @return array
|
|
*/
|
|
public function indexNames($tableName) {
|
|
return $this->preparedQuery('
|
|
SELECT ind.name FROM sys.indexes ind
|
|
INNER JOIN sys.tables t ON ind.object_id = t.object_id
|
|
WHERE is_primary_key = 0 AND t.name = ?',
|
|
array($tableName)
|
|
)->column();
|
|
}
|
|
|
|
public function tableList() {
|
|
$tables = array();
|
|
foreach($this->query("EXEC sp_tables @table_owner = 'dbo';") as $record) {
|
|
$tables[strtolower($record['TABLE_NAME'])] = $record['TABLE_NAME'];
|
|
}
|
|
return $tables;
|
|
}
|
|
|
|
/**
|
|
* Return a boolean type-formatted string
|
|
* We use 'bit' so that we can do numeric-based comparisons
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function boolean($values) {
|
|
$default = ($values['default']) ? '1' : '0';
|
|
return 'bit not null default ' . $default;
|
|
}
|
|
|
|
/**
|
|
* Return a date type-formatted string.
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function date($values) {
|
|
return 'date null';
|
|
}
|
|
|
|
/**
|
|
* Return a decimal type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function decimal($values) {
|
|
// Avoid empty strings being put in the db
|
|
if($values['precision'] == '') {
|
|
$precision = 1;
|
|
} else {
|
|
$precision = $values['precision'];
|
|
}
|
|
|
|
$defaultValue = '0';
|
|
if(isset($values['default']) && is_numeric($values['default'])) {
|
|
$defaultValue = $values['default'];
|
|
}
|
|
|
|
return "decimal($precision) not null default $defaultValue";
|
|
}
|
|
|
|
/**
|
|
* Return a enum type-formatted string
|
|
*
|
|
* @params 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
|
|
|
|
$maxLength = max(array_map('strlen', $values['enums']));
|
|
|
|
return "varchar($maxLength) not null default '" . $values['default']
|
|
. "' check(\"" . $values['name'] . "\" in ('" . implode("','", $values['enums'])
|
|
. "'))";
|
|
}
|
|
|
|
/**
|
|
* @todo Make this work like {@link MySQLDatabase::set()}
|
|
*/
|
|
public function set($values) {
|
|
return $this->enum($values);
|
|
}
|
|
|
|
/**
|
|
* Return a float type-formatted string.
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function float($values) {
|
|
return 'float(53) not null default ' . $values['default'];
|
|
}
|
|
|
|
/**
|
|
* Return a int type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function int($values) {
|
|
return 'int not null default ' . (int) $values['default'];
|
|
}
|
|
|
|
/**
|
|
* Return a bigint type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function bigint($values) {
|
|
return 'bigint not null default ' . (int) $values['default'];
|
|
}
|
|
|
|
/**
|
|
* Return a datetime type-formatted string
|
|
* For MS SQL, we simply return the word 'timestamp', no other parameters are necessary
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function ss_datetime($values) {
|
|
return 'datetime null';
|
|
}
|
|
|
|
/**
|
|
* Return a text type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function text($values) {
|
|
$collation = MSSQLDatabase::get_collation();
|
|
$collationSQL = $collation ? " COLLATE $collation" : "";
|
|
return "nvarchar(max)$collationSQL null";
|
|
}
|
|
|
|
/**
|
|
* Return a time type-formatted string.
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function time($values){
|
|
return 'time null';
|
|
}
|
|
|
|
/**
|
|
* Return a varchar type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function varchar($values) {
|
|
$collation = MSSQLDatabase::get_collation();
|
|
$collationSQL = $collation ? " COLLATE $collation" : "";
|
|
return "nvarchar(" . $values['precision'] . ")$collationSQL null";
|
|
}
|
|
|
|
/**
|
|
* Return a 4 digit numeric type.
|
|
* @return string
|
|
*/
|
|
public function year($values) {
|
|
return 'numeric(4)';
|
|
}
|
|
|
|
/**
|
|
* This returns the column which is the primary key for each table
|
|
* @return string
|
|
*/
|
|
function IdColumn($asDbValue = false, $hasAutoIncPK = true){
|
|
if($asDbValue) {
|
|
return 'int not null';
|
|
} else if($hasAutoIncPK) {
|
|
return 'int identity(1,1)';
|
|
} else {
|
|
return 'int not null';
|
|
}
|
|
}
|
|
|
|
function hasTable($tableName) {
|
|
return (bool)$this->preparedQuery(
|
|
"SELECT table_name FROM information_schema.tables WHERE table_name = ?",
|
|
array($tableName)
|
|
)->value();
|
|
}
|
|
|
|
/**
|
|
* Returns the values of the given enum field
|
|
* NOTE: Experimental; introduced for db-abstraction and may changed before 2.4 is released.
|
|
*/
|
|
public function enumValuesForField($tableName, $fieldName) {
|
|
$classes = array();
|
|
|
|
// Get the enum of all page types from the SiteTree table
|
|
$clause = $this->getConstraintCheckClause($tableName, $fieldName);
|
|
if($clause) {
|
|
$classes = $this->enumValuesFromCheckClause($clause);
|
|
}
|
|
|
|
return $classes;
|
|
}
|
|
|
|
/**
|
|
* This is a lookup table for data types.
|
|
*
|
|
* For instance, MSSQL uses 'BIGINT', while MySQL uses 'UNSIGNED'
|
|
* and PostgreSQL uses 'INT'.
|
|
*/
|
|
function dbDataType($type){
|
|
$values = array(
|
|
'unsigned integer'=>'BIGINT'
|
|
);
|
|
if(isset($values[$type])) {
|
|
return $values[$type];
|
|
} else {
|
|
return '';
|
|
}
|
|
}
|
|
|
|
protected function indexKey($table, $index, $spec) {
|
|
return $index;
|
|
}
|
|
}
|