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mysql.zep
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mysql.zep
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/*
+------------------------------------------------------------------------+
| Phalcon Framework |
+------------------------------------------------------------------------+
| Copyright (c) 2011-2017 Phalcon Team (https://phalconphp.com) |
+------------------------------------------------------------------------+
| This source file is subject to the New BSD License that is bundled |
| with this package in the file LICENSE.txt. |
| |
| If you did not receive a copy of the license and are unable to |
| obtain it through the world-wide-web, please send an email |
| to license@phalconphp.com so we can send you a copy immediately. |
+------------------------------------------------------------------------+
| Authors: Andres Gutierrez <andres@phalconphp.com> |
| Eduar Carvajal <eduar@phalconphp.com> |
+------------------------------------------------------------------------+
*/
namespace Phalcon\Db\Dialect;
use Phalcon\Db\Dialect;
use Phalcon\Db\Column;
use Phalcon\Db\Exception;
use Phalcon\Db\IndexInterface;
use Phalcon\Db\ColumnInterface;
use Phalcon\Db\ReferenceInterface;
use Phalcon\Db\DialectInterface;
/**
* Phalcon\Db\Dialect\Mysql
*
* Generates database specific SQL for the MySQL RDBMS
*/
class Mysql extends Dialect
{
protected _escapeChar = "`";
/**
* Gets the column name in MySQL
*/
public function getColumnDefinition(<ColumnInterface> column) -> string
{
var columnSql, size, scale, type, typeValues;
let columnSql = "";
let type = column->getType();
if typeof type == "string" {
let columnSql .= type;
let type = column->getTypeReference();
}
switch type {
case Column::TYPE_INTEGER:
if empty columnSql {
let columnSql .= "INT";
}
let columnSql .= "(" . column->getSize() . ")";
if column->isUnsigned() {
let columnSql .= " UNSIGNED";
}
break;
case Column::TYPE_DATE:
if empty columnSql {
let columnSql .= "DATE";
}
break;
case Column::TYPE_VARCHAR:
if empty columnSql {
let columnSql .= "VARCHAR";
}
let columnSql .= "(" . column->getSize() . ")";
break;
case Column::TYPE_DECIMAL:
if empty columnSql {
let columnSql .= "DECIMAL";
}
let columnSql .= "(" . column->getSize() . "," . column->getScale() . ")";
if column->isUnsigned() {
let columnSql .= " UNSIGNED";
}
break;
case Column::TYPE_DATETIME:
if empty columnSql {
let columnSql .= "DATETIME";
}
break;
case Column::TYPE_TIMESTAMP:
if empty columnSql {
let columnSql .= "TIMESTAMP";
}
break;
case Column::TYPE_CHAR:
if empty columnSql {
let columnSql .= "CHAR";
}
let columnSql .= "(" . column->getSize() . ")";
break;
case Column::TYPE_TEXT:
if empty columnSql {
let columnSql .= "TEXT";
}
break;
case Column::TYPE_BOOLEAN:
if empty columnSql {
let columnSql .= "TINYINT(1)";
}
break;
case Column::TYPE_FLOAT:
if empty columnSql {
let columnSql .= "FLOAT";
}
let size = column->getSize();
if size {
let scale = column->getScale();
if scale {
let columnSql .= "(" . size . "," . scale . ")";
} else {
let columnSql .= "(" . size . ")";
}
}
if column->isUnsigned() {
let columnSql .= " UNSIGNED";
}
break;
case Column::TYPE_DOUBLE:
if empty columnSql {
let columnSql .= "DOUBLE";
}
let size = column->getSize();
if size {
let scale = column->getScale(),
columnSql .= "(" . size;
if scale {
let columnSql .= "," . scale . ")";
} else {
let columnSql .= ")";
}
}
if column->isUnsigned() {
let columnSql .= " UNSIGNED";
}
break;
case Column::TYPE_BIGINTEGER:
if empty columnSql {
let columnSql .= "BIGINT";
}
let scale = column->getSize();
if scale {
let columnSql .= "(" . column->getSize() . ")";
}
if column->isUnsigned() {
let columnSql .= " UNSIGNED";
}
break;
case Column::TYPE_TINYBLOB:
if empty columnSql {
let columnSql .= "TINYBLOB";
}
break;
case Column::TYPE_BLOB:
if empty columnSql {
let columnSql .= "BLOB";
}
break;
case Column::TYPE_MEDIUMBLOB:
if empty columnSql {
let columnSql .= "MEDIUMBLOB";
}
break;
case Column::TYPE_LONGBLOB:
if empty columnSql {
let columnSql .= "LONGBLOB";
}
break;
default:
if empty columnSql {
throw new Exception("Unrecognized MySQL data type at column " . column->getName());
}
let typeValues = column->getTypeValues();
if !empty typeValues {
if typeof typeValues == "array" {
var value, valueSql;
let valueSql = "";
for value in typeValues {
let valueSql .= "\"" . addcslashes(value, "\"") . "\", ";
}
let columnSql .= "(" . substr(valueSql, 0, -2) . ")";
} else {
let columnSql .= "(\"" . addcslashes(typeValues, "\"") . "\")";
}
}
}
return columnSql;
}
/**
* Generates SQL to add a column to a table
*/
public function addColumn(string! tableName, string! schemaName, <ColumnInterface> column) -> string
{
var afterPosition, sql, defaultValue;
let sql = "ALTER TABLE " . this->prepareTable(tableName, schemaName) . " ADD `" . column->getName() . "` " . this->getColumnDefinition(column);
if column->hasDefault() {
let defaultValue = column->getDefault();
if memstr(strtoupper(defaultValue), "CURRENT_TIMESTAMP") {
let sql .= " DEFAULT CURRENT_TIMESTAMP";
} else {
let sql .= " DEFAULT \"" . addcslashes(defaultValue, "\"") . "\"";
}
}
if column->isNotNull() {
let sql .= " NOT NULL";
}
if column->isAutoIncrement() {
let sql .= " AUTO_INCREMENT";
}
if column->isFirst() {
let sql .= " FIRST";
} else {
let afterPosition = column->getAfterPosition();
if afterPosition {
let sql .= " AFTER `" . afterPosition . "`";
}
}
return sql;
}
/**
* Generates SQL to modify a column in a table
*/
public function modifyColumn(string! tableName, string! schemaName, <ColumnInterface> column, <ColumnInterface> currentColumn = null) -> string
{
var afterPosition, sql, defaultValue, columnDefinition;
let columnDefinition = this->getColumnDefinition(column),
sql = "ALTER TABLE " . this->prepareTable(tableName, schemaName);
if typeof currentColumn != "object" {
let currentColumn = column;
}
if column->getName() !== currentColumn->getName() {
let sql .= " CHANGE COLUMN `" . currentColumn->getName() . "` `" . column->getName() . "` " . columnDefinition;
} else {
let sql .= " MODIFY `" . column->getName() . "` " . columnDefinition;
}
if column->hasDefault() {
let defaultValue = column->getDefault();
if memstr(strtoupper(defaultValue), "CURRENT_TIMESTAMP") {
let sql .= " DEFAULT CURRENT_TIMESTAMP";
} else {
let sql .= " DEFAULT \"" . addcslashes(defaultValue, "\"") . "\"";
}
}
if column->isNotNull() {
let sql .= " NOT NULL";
}
if column->isAutoIncrement() {
let sql .= " AUTO_INCREMENT";
}
if column->isFirst() {
let sql .= " FIRST";
} else {
let afterPosition = column->getAfterPosition();
if afterPosition {
let sql .= " AFTER `" . afterPosition . "`";
}
}
return sql;
}
/**
* Generates SQL to delete a column from a table
*/
public function dropColumn(string! tableName, string! schemaName, string! columnName) -> string
{
return "ALTER TABLE " . this->prepareTable(tableName, schemaName) . " DROP COLUMN `" . columnName . "`";
}
/**
* Generates SQL to add an index to a table
*/
public function addIndex(string! tableName, string! schemaName, <IndexInterface> index) -> string
{
var sql, indexType;
let sql = "ALTER TABLE " . this->prepareTable(tableName, schemaName);
let indexType = index->getType();
if !empty indexType {
let sql .= " ADD " . indexType . " INDEX ";
} else {
let sql .= " ADD INDEX ";
}
let sql .= "`" . index->getName() . "` (" . this->getColumnList(index->getColumns()) . ")";
return sql;
}
/**
* Generates SQL to delete an index from a table
*/
public function dropIndex(string! tableName, string! schemaName, string! indexName) -> string
{
return "ALTER TABLE " . this->prepareTable(tableName, schemaName) . " DROP INDEX `" . indexName . "`";
}
/**
* Generates SQL to add the primary key to a table
*/
public function addPrimaryKey(string! tableName, string! schemaName, <IndexInterface> index) -> string
{
return "ALTER TABLE " . this->prepareTable(tableName, schemaName) . " ADD PRIMARY KEY (" . this->getColumnList(index->getColumns()) . ")";
}
/**
* Generates SQL to delete primary key from a table
*/
public function dropPrimaryKey(string! tableName, string! schemaName) -> string
{
return "ALTER TABLE " . this->prepareTable(tableName, schemaName) . " DROP PRIMARY KEY";
}
/**
* Generates SQL to add an index to a table
*/
public function addForeignKey(string! tableName, string! schemaName, <ReferenceInterface> reference) -> string
{
var sql, onDelete, onUpdate;
let sql = "ALTER TABLE " . this->prepareTable(tableName, schemaName) . " ADD";
if reference->getName() {
let sql .= " CONSTRAINT `" . $reference->getName() . "`";
}
let sql .= " FOREIGN KEY (" . this->getColumnList(reference->getColumns()) . ") REFERENCES " . this->prepareTable(reference->getReferencedTable(), reference->getReferencedSchema()) . "(" . this->getColumnList(reference->getReferencedColumns()) . ")";
let onDelete = reference->getOnDelete();
if !empty onDelete {
let sql .= " ON DELETE " . onDelete;
}
let onUpdate = reference->getOnUpdate();
if !empty onUpdate {
let sql .= " ON UPDATE " . onUpdate;
}
return sql;
}
/**
* Generates SQL to delete a foreign key from a table
*/
public function dropForeignKey(string! tableName, string! schemaName, string! referenceName) -> string
{
return "ALTER TABLE " . this->prepareTable(tableName, schemaName) . " DROP FOREIGN KEY `" . referenceName . "`";
}
/**
* Generates SQL to create a table
*/
public function createTable(string! tableName, string! schemaName, array! definition) -> string
{
var temporary, options, table, createLines, columns,
column, indexes, index, reference, references, indexName,
indexSql, sql, columnLine, indexType,
referenceSql, onDelete, onUpdate, defaultValue;
if !fetch columns, definition["columns"] {
throw new Exception("The index 'columns' is required in the definition array");
}
let table = this->prepareTable(tableName, schemaName);
let temporary = false;
if fetch options, definition["options"] {
fetch temporary, options["temporary"];
}
/**
* Create a temporary or normal table
*/
if temporary {
let sql = "CREATE TEMPORARY TABLE " . table . " (\n\t";
} else {
let sql = "CREATE TABLE " . table . " (\n\t";
}
let createLines = [];
for column in columns {
let columnLine = "`" . column->getName() . "` " . this->getColumnDefinition(column);
/**
* Add a Default clause
*/
if column->hasDefault() {
let defaultValue = column->getDefault();
if memstr(strtoupper(defaultValue), "CURRENT_TIMESTAMP") {
let columnLine .= " DEFAULT CURRENT_TIMESTAMP";
} else {
let columnLine .= " DEFAULT \"" . addcslashes(defaultValue, "\"") . "\"";
}
}
/**
* Add a NOT NULL clause
*/
if column->isNotNull() {
let columnLine .= " NOT NULL";
}
/**
* Add an AUTO_INCREMENT clause
*/
if column->isAutoIncrement() {
let columnLine .= " AUTO_INCREMENT";
}
/**
* Mark the column as primary key
*/
if column->isPrimary() {
let columnLine .= " PRIMARY KEY";
}
let createLines[] = columnLine;
}
/**
* Create related indexes
*/
if fetch indexes, definition["indexes"] {
for index in indexes {
let indexName = index->getName();
let indexType = index->getType();
/**
* If the index name is primary we add a primary key
*/
if indexName == "PRIMARY" {
let indexSql = "PRIMARY KEY (" . this->getColumnList(index->getColumns()) . ")";
} else {
if !empty indexType {
let indexSql = indexType . " KEY `" . indexName . "` (" . this->getColumnList(index->getColumns()) . ")";
} else {
let indexSql = "KEY `" . indexName . "` (" . this->getColumnList(index->getColumns()) . ")";
}
}
let createLines[] = indexSql;
}
}
/**
* Create related references
*/
if fetch references, definition["references"] {
for reference in references {
let referenceSql = "CONSTRAINT `" . reference->getName() . "` FOREIGN KEY (" . this->getColumnList(reference->getColumns()) . ")"
. " REFERENCES `" . reference->getReferencedTable() . "`(" . this->getColumnList(reference->getReferencedColumns()) . ")";
let onDelete = reference->getOnDelete();
if !empty onDelete {
let referenceSql .= " ON DELETE " . onDelete;
}
let onUpdate = reference->getOnUpdate();
if !empty onUpdate {
let referenceSql .= " ON UPDATE " . onUpdate;
}
let createLines[] = referenceSql;
}
}
let sql .= join(",\n\t", createLines) . "\n)";
if isset definition["options"] {
let sql .= " " . this->_getTableOptions(definition);
}
return sql;
}
/**
* Generates SQL to truncate a table
*/
public function truncateTable(string! tableName, string! schemaName) -> string
{
var sql, table;
if schemaName {
let table = "`" . schemaName . "`.`" . tableName . "`";
} else {
let table = "`" . tableName . "`";
}
let sql = "TRUNCATE TABLE " . table;
return sql;
}
/**
* Generates SQL to drop a table
*/
public function dropTable(string! tableName, string schemaName = null, boolean! ifExists = true) -> string
{
var sql, table;
let table = this->prepareTable(tableName, schemaName);
if ifExists {
let sql = "DROP TABLE IF EXISTS " . table;
} else {
let sql = "DROP TABLE " . table;
}
return sql;
}
/**
* Generates SQL to create a view
*/
public function createView(string! viewName, array! definition, string schemaName = null) -> string
{
var viewSql;
if !fetch viewSql, definition["sql"] {
throw new Exception("The index 'sql' is required in the definition array");
}
return "CREATE VIEW " . this->prepareTable(viewName, schemaName) . " AS " . viewSql;
}
/**
* Generates SQL to drop a view
*/
public function dropView(string! viewName, string schemaName = null, boolean! ifExists = true) -> string
{
var sql, view;
let view = this->prepareTable(viewName, schemaName);
if ifExists {
let sql = "DROP VIEW IF EXISTS " . view;
} else {
let sql = "DROP VIEW " . view;
}
return sql;
}
/**
* Generates SQL checking for the existence of a schema.table
*
* <code>
* echo $dialect->tableExists("posts", "blog");
*
* echo $dialect->tableExists("posts");
* </code>
*/
public function tableExists(string! tableName, string schemaName = null) -> string
{
if schemaName {
return "SELECT IF(COUNT(*) > 0, 1, 0) FROM `INFORMATION_SCHEMA`.`TABLES` WHERE `TABLE_NAME`= '" . tableName . "' AND `TABLE_SCHEMA` = '" . schemaName . "'";
}
return "SELECT IF(COUNT(*) > 0, 1, 0) FROM `INFORMATION_SCHEMA`.`TABLES` WHERE `TABLE_NAME` = '" . tableName . "' AND `TABLE_SCHEMA` = DATABASE()";
}
/**
* Generates SQL checking for the existence of a schema.view
*/
public function viewExists(string! viewName, string schemaName = null) -> string
{
if schemaName {
return "SELECT IF(COUNT(*) > 0, 1, 0) FROM `INFORMATION_SCHEMA`.`VIEWS` WHERE `TABLE_NAME`= '" . viewName . "' AND `TABLE_SCHEMA`='" . schemaName . "'";
}
return "SELECT IF(COUNT(*) > 0, 1, 0) FROM `INFORMATION_SCHEMA`.`VIEWS` WHERE `TABLE_NAME`='" . viewName . "' AND `TABLE_SCHEMA` = DATABASE()";
}
/**
* Generates SQL describing a table
*
* <code>
* print_r(
* $dialect->describeColumns("posts")
* );
* </code>
*/
public function describeColumns(string! table, string schema = null) -> string
{
return "DESCRIBE " . this->prepareTable(table, schema);
}
/**
* List all tables in database
*
* <code>
* print_r(
* $dialect->listTables("blog")
* );
* </code>
*/
public function listTables(string schemaName = null) -> string
{
if schemaName {
return "SHOW TABLES FROM `" . schemaName . "`";
}
return "SHOW TABLES";
}
/**
* Generates the SQL to list all views of a schema or user
*/
public function listViews(string! schemaName = null) -> string
{
if schemaName {
return "SELECT `TABLE_NAME` AS view_name FROM `INFORMATION_SCHEMA`.`VIEWS` WHERE `TABLE_SCHEMA` = '" . schemaName . "' ORDER BY view_name";
}
return "SELECT `TABLE_NAME` AS view_name FROM `INFORMATION_SCHEMA`.`VIEWS` WHERE `TABLE_SCHEMA` = DATABASE() ORDER BY view_name";
}
/**
* Generates SQL to query indexes on a table
*/
public function describeIndexes(string! table, string schema = null) -> string
{
return "SHOW INDEXES FROM " . this->prepareTable(table, schema);
}
/**
* Generates SQL to query foreign keys on a table
*/
public function describeReferences(string! table, string schema = null) -> string
{
var sql = "SELECT DISTINCT KCU.TABLE_NAME, KCU.COLUMN_NAME, KCU.CONSTRAINT_NAME, KCU.REFERENCED_TABLE_SCHEMA, KCU.REFERENCED_TABLE_NAME, KCU.REFERENCED_COLUMN_NAME, RC.UPDATE_RULE, RC.DELETE_RULE FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS KCU LEFT JOIN INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS AS RC ON RC.CONSTRAINT_NAME = KCU.CONSTRAINT_NAME AND RC.CONSTRAINT_SCHEMA = KCU.CONSTRAINT_SCHEMA WHERE KCU.REFERENCED_TABLE_NAME IS NOT NULL AND ";
if schema {
let sql .= "KCU.CONSTRAINT_SCHEMA = '" . schema . "' AND KCU.TABLE_NAME = '" . table . "'";
} else {
let sql .= "KCU.CONSTRAINT_SCHEMA = DATABASE() AND KCU.TABLE_NAME = '" . table . "'";
}
return sql;
}
/**
* Generates the SQL to describe the table creation options
*/
public function tableOptions(string! table, string schema = null) -> string
{
var sql = "SELECT TABLES.TABLE_TYPE AS table_type,TABLES.AUTO_INCREMENT AS auto_increment,TABLES.ENGINE AS engine,TABLES.TABLE_COLLATION AS table_collation FROM INFORMATION_SCHEMA.TABLES WHERE ";
if schema {
return sql . "TABLES.TABLE_SCHEMA = '" . schema . "' AND TABLES.TABLE_NAME = '" . table . "'";
}
return sql . "TABLES.TABLE_SCHEMA = DATABASE() AND TABLES.TABLE_NAME = '" . table . "'";
}
/**
* Generates SQL to add the table creation options
*/
protected function _getTableOptions(array! definition) -> string
{
var options, engine, autoIncrement, tableCollation,
collationParts, tableOptions;
if fetch options, definition["options"] {
let tableOptions = [];
/**
* Check if there is an ENGINE option
*/
if fetch engine, options["ENGINE"] {
if engine {
let tableOptions[] = "ENGINE=" . engine;
}
}
/**
* Check if there is an AUTO_INCREMENT option
*/
if fetch autoIncrement, options["AUTO_INCREMENT"] {
if autoIncrement {
let tableOptions[] = "AUTO_INCREMENT=" . autoIncrement;
}
}
/**
* Check if there is a TABLE_COLLATION option
*/
if fetch tableCollation, options["TABLE_COLLATION"] {
if tableCollation {
let collationParts = explode("_", tableCollation),
tableOptions[] = "DEFAULT CHARSET=" . collationParts[0],
tableOptions[] = "COLLATE=" . tableCollation;
}
}
if count(tableOptions) {
return join(" ", tableOptions);
}
}
return "";
}
/**
* Generates SQL to check DB parameter FOREIGN_KEY_CHECKS.
*/
public function getForeignKeyChecks() -> string
{
var sql;
let sql = "SELECT @@foreign_key_checks";
return sql;
}
}