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Merge pull request #1406 from p0larbeer/master 

DB Schema OCI
tags/2.0.0-beta
Qiang Xue 11 years ago
parent
e2b4708bbd d30aa3efef
commit
7eabab0629
3 changed files with 534 additions and 0 deletions
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  1. 92
      framework/yii/db/oci/ColumnSchema.php
  2. 78
      framework/yii/db/oci/QueryBuilder.php
  3. 364
      framework/yii/db/oci/Schema.php

92
framework/yii/db/oci/ColumnSchema.php
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<?php
namespace yii\db\oci;
class ColumnSchema extends \yii\db\ColumnSchema
{
/**
* Initializes the column with its DB type and default value.
* This sets up the column's PHP type, size, precision, scale as well as default value.
*
* @param string $dbType
* the column's DB type
* @param mixed $defaultValue
* the default value
*/
public function extract($dbType, $defaultValue)
{
$this->dbType = $dbType;
$this->extractType($dbType);
$this->extractLimit($dbType);
if ($defaultValue !== null)
$this->extractDefault($defaultValue);
}
/**
* Extracts the PHP type from DB type.
*
* @param string $dbType
* DB type
* @return string
*/
protected function extractOraType($dbType)
{
if (strpos($dbType, 'FLOAT') !== false)
return 'double';
if (strpos($dbType, 'NUMBER') !== false || strpos($dbType, 'INTEGER') !== false) {
if (strpos($dbType, '(') && preg_match('/\((.*)\)/', $dbType, $matches)) {
$values = explode(',', $matches[1]);
if (isset($values[1]) and (((int) $values[1]) > 0))
return 'double';
else
return 'integer';
} else
return 'double';
} else
return 'string';
}
/**
* Extracts the PHP type from DB type.
*
* @param string $dbType
* DB type
*/
protected function extractType($dbType)
{
$this->type = $this->extractOraType($dbType);
}
/**
* Extracts size, precision and scale information from column's DB type.
*
* @param string $dbType
* the column's DB type
*/
protected function extractLimit($dbType)
{
if (strpos($dbType, '(') && preg_match('/\((.*)\)/', $dbType, $matches)) {
$values = explode(',', $matches[1]);
$this->size = $this->precision = (int) $values[0];
if (isset($values[1]))
$this->scale = (int) $values[1];
}
}
/**
* Extracts the default value for the column.
* The value is typecasted to correct PHP type.
*
* @param mixed $defaultValue
* the default value obtained from metadata
*/
protected function extractDefault($defaultValue)
{
if (stripos($defaultValue, 'timestamp') !== false) {
$this->defaultValue = null;
} else {
$this->defaultValue = $this->typecast($defaultValue);
}
}
}

78
framework/yii/db/oci/QueryBuilder.php
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<?php
namespace yii\db\oci;
use yii\db\Exception;
use yii\base\InvalidParamException;
/**
* QueryBuilder is the query builder for Oracle databases.
*
*/
class QueryBuilder extends \yii\db\QueryBuilder
{
private $sql;
public function build($query)
{
// var_dump($query);exit;
$params = $query->params;
$clauses = [
$this->buildSelect ( $query->select, $query->distinct, $query->selectOption ),
$this->buildFrom ( $query->from ),
$this->buildJoin ( $query->join, $params ),
$this->buildWhere ( $query->where, $params ),
$this->buildGroupBy ( $query->groupBy ),
$this->buildHaving ( $query->having, $params ),
$this->buildUnion ( $query->union, $params ),
$this->buildOrderBy ( $query->orderBy )
// $this->buildLimit($query->limit, $query->offset),
;
// var_dump( [implode($this->separator, array_filter($clauses)), $params]);exit;
$this->sql = implode($this->separator, array_filter($clauses));
if (! is_null($query->limit) && ! is_null($query->offset)) {
$this->sql = $this->buildLimit($query->limit, $query->offset);
}
return [
$this->sql,
$params
];
// return [implode($this->separator, array_filter($clauses)), $params];
}
public function buildLimit($limit, $offset)
{
// var_dump($limit >= 0);
// var_dump($offset);exit;
// var_dump($limit, $offset);
if (($limit < 0) && ($offset < 0)) {
return $this->sql;
}
$filters = array();
if ($offset > 0) {
$filters[] = 'rowNumId > ' . (int) $offset;
}
if ($limit >= 0) {
$filters[] = 'rownum <= ' . (int) $limit;
}
if (count($filters) > 0) {
$filter = implode(' and ', $filters);
$filter = " WHERE " . $filter;
} else {
$filter = '';
}
$sql = <<<EOD
WITH USER_SQL AS ({$this->sql}),
PAGINATION AS (SELECT USER_SQL.*, rownum as rowNumId FROM USER_SQL)
SELECT *
FROM PAGINATION
{$filter}
EOD;
return $sql;
}
}

364
framework/yii/db/oci/Schema.php
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<?php
namespace yii\db\oci;
use yii\db\TableSchema;
use yii\db\oci\ColumnSchema;
/**
* Schema is the class for retrieving metadata information from an Oracle database.
*
*/
class Schema extends \yii\db\Schema
{
private $_defaultSchema = '';
public function createQueryBuilder()
{
return new QueryBuilder($this->db);
}
public function quoteTableName($name)
{
if (strpos($name, '.') === false) {
return $this->quoteSimpleTableName($name);
}
$parts = explode('.', $name);
foreach ($parts as $i => $part) {
$parts[$i] = $this->quoteSimpleTableName($part);
}
return implode('.', $parts);
}
public function quoteSimpleTableName($name)
{
return '"' . $name . '"';
// return $name;
}
public function quoteColumnName($name)
{
if (($pos = strrpos($name, '.')) !== false) {
$prefix = $this->quoteTableName(substr($name, 0, $pos)) . '.';
$name = substr($name, $pos + 1);
} else {
$prefix = '';
}
return $prefix . ($name === '*' ? $name : $this->quoteSimpleColumnName($name));
}
public function quoteSimpleColumnName($name)
{
return '"' . $name . '"';
// return $name;
}
public function loadTableSchema($name)
{
$table = new TableSchema();
$this->resolveTableNames($table, $name);
// $this->findPrimaryKeys($table);
if ($this->findColumns($table)) {
// $this->findForeignKeys($table);
$this->findConstraints($table);
return $table;
}
}
/**
* Resolves the table name and schema name (if any).
*
* @param TableSchema $table
* the table metadata object
* @param string $name
* the table name
*/
protected function resolveTableNames($table, $name)
{
$parts = explode('.', str_replace('"', '', $name));
if (isset($parts[1])) {
$table->schemaName = $parts[0];
$table->name = $parts[1];
} else {
$table->name = $parts[0];
}
if ($table->schemaName === null) {
$table->schemaName = $this->getDefaultSchema();
}
}
/**
*
* @return string default schema.
*/
public function getDefaultSchema()
{
if (! strlen($this->_defaultSchema)) {
$this->setDefaultSchema(strtoupper($this->db->username));
}
return $this->_defaultSchema;
}
/**
*
* @param string $schema
* default schema.
*/
public function setDefaultSchema($schema)
{
$this->_defaultSchema = $schema;
}
public function getLastInsertID($sequenceName = '')
{
if ($this->db->isActive) {
$sql = "select {$sequenceName}.currval from dual";
return $this->db->createCommand($sql)->queryScalar();
} else {
throw new InvalidCallException('DB Connection is not active.');
}
}
/**
* Collects the table column metadata.
*
*/
protected function findColumns($table)
{
$schemaName = $table->schemaName;
$tableName = $table->name;
$sql = <<<EOD
SELECT a.column_name, a.data_type ||
case
when data_precision is not null
then '(' || a.data_precision ||
case when a.data_scale > 0 then ',' || a.data_scale else '' end
|| ')'
when data_type = 'DATE' then ''
when data_type = 'NUMBER' then ''
else '(' || to_char(a.data_length) || ')'
end as data_type,
a.nullable, a.data_default,
( SELECT D.constraint_type
FROM ALL_CONS_COLUMNS C
inner join ALL_constraints D on D.OWNER = C.OWNER and D.constraint_name = C.constraint_name
WHERE C.OWNER = B.OWNER
and C.table_name = B.object_name
and C.column_name = A.column_name
and D.constraint_type = 'P') as Key,
com.comments as column_comment
FROM ALL_TAB_COLUMNS A
inner join ALL_OBJECTS B ON b.owner = a.owner and ltrim(B.OBJECT_NAME) = ltrim(A.TABLE_NAME)
LEFT JOIN user_col_comments com ON (A.table_name = com.table_name AND A.column_name = com.column_name)
WHERE
a.owner = '{$schemaName}'
and (b.object_type = 'TABLE' or b.object_type = 'VIEW')
and b.object_name = '{$tableName}'
ORDER by a.column_id
EOD;
try {
$columns = $this->db->createCommand($sql)->queryAll();
} catch (\Exception $e) {
return false;
}
foreach ($columns as $column) {
$c = $this->createColumn($column);
$table->columns[$c->name] = $c;
if ($c->isPrimaryKey) {
if ($table->primaryKey === null) {
$table->primaryKey = $c->name;
} elseif (is_string($table->primaryKey)) {
$table->primaryKey = array(
$table->primaryKey,
$c->name
);
} else {
$table->primaryKey[] = $c->name;
}
$sql = "select sequence_name
from user_tables tabs
join user_triggers trigs
on trigs.table_name = tabs.table_name
join user_dependencies deps
on deps.name = trigs.trigger_name
join user_sequences seqs
on seqs.sequence_name = deps.referenced_name
where tabs.table_name = '{$tableName}'
and trigs.triggering_event = 'INSERT'";
try {
$seqName = $this->db->createCommand($sql)->queryScalar();
} catch (\Exception $e) {
return false;
}
$table->sequenceName = $seqName;
$c->autoIncrement = true;
}
}
return true;
}
protected function createColumn($column)
{
$c = new ColumnSchema();
$c->name = $column['COLUMN_NAME'];
$c->allowNull = $column['NULLABLE'] === 'Y';
$c->isPrimaryKey = strpos($column['KEY'], 'P') !== false;
$c->extract($column['DATA_TYPE'], $column['DATA_DEFAULT']);
$c->comment = $column['COLUMN_COMMENT'] === null ? '' : $column['COLUMN_COMMENT'];
return $c;
}
protected function findConstraints($table)
{
$sql = <<<EOD
SELECT D.constraint_type as CONSTRAINT_TYPE, C.COLUMN_NAME, C.position, D.r_constraint_name,
E.table_name as table_ref, f.column_name as column_ref,
C.table_name
FROM ALL_CONS_COLUMNS C
inner join ALL_constraints D on D.OWNER = C.OWNER and D.constraint_name = C.constraint_name
left join ALL_constraints E on E.OWNER = D.r_OWNER and E.constraint_name = D.r_constraint_name
left join ALL_cons_columns F on F.OWNER = E.OWNER and F.constraint_name = E.constraint_name and F.position = c.position
WHERE C.OWNER = '{$table->schemaName}'
and C.table_name = '{$table->name}'
and D.constraint_type <> 'P'
order by d.constraint_name, c.position
EOD;
$command = $this->db->createCommand($sql);
foreach ($command->queryAll() as $row) {
if ($row['CONSTRAINT_TYPE'] === 'R') { // foreign key
$name = $row["COLUMN_NAME"];
$table->foreignKeys[$name] = array(
$row["TABLE_REF"],
$row["COLUMN_REF"]
);
/*
* if (isset($table->columns[$name])) { $table->columns[$name]->isForeignKey = true; }
*/
}
}
}
/**
* Returns all table names in the database.
*
* @param string $schema
* the schema of the tables. Defaults to empty string, meaning the current or default schema.
* If not empty, the returned table names will be prefixed with the schema name.
* @return array all table names in the database.
*/
protected function findTableNames($schema = '')
{
if ($schema === '') {
$sql = <<<EOD
SELECT table_name, '{$schema}' as table_schema FROM user_tables
EOD;
$command = $this->db->createCommand($sql);
} else {
$sql = <<<EOD
SELECT object_name as table_name, owner as table_schema FROM all_objects
WHERE object_type = 'TABLE' AND owner=:schema
EOD;
$command = $this->db > createCommand($sql);
$command->bindParam(':schema', $schema);
}
$rows = $command->queryAll();
$names = array();
foreach ($rows as $row) {
if ($schema === $this->getDefaultSchema() || $schema === '') {
$names[] = $row['TABLE_NAME'];
} else {
$names[] = $row['TABLE_SCHEMA'] . '.' . $row['TABLE_NAME'];
}
}
return $names;
}
/**
* Builds a SQL statement for renaming a DB table.
*
* @param string $table
* the table to be renamed. The name will be properly quoted by the method.
* @param string $newName
* the new table name. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB table.
* @since 1.1.6
*/
public function renameTable($table, $newName)
{
return 'ALTER TABLE ' . $this->quoteTableName($table) . ' RENAME TO ' . $this->quoteTableName($newName);
}
/**
* Builds a SQL statement for changing the definition of a column.
*
* @param string $table
* the table whose column is to be changed. The table name will be properly quoted by the method.
* @param string $column
* the name of the column to be changed. The name will be properly quoted by the method.
* @param string $type
* the new column type. The {@link getColumnType} method will be invoked to convert abstract column type (if any)
* into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
* For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
* @return string the SQL statement for changing the definition of a column.
* @since 1.1.6
*/
public function alterColumn($table, $column, $type)
{
$type = $this->getColumnType($type);
$sql = 'ALTER TABLE ' . $this->quoteTableName($table) . ' MODIFY ' . $this->quoteColumnName($column) . ' ' . $this->getColumnType($type);
return $sql;
}
/**
* Builds a SQL statement for dropping an index.
*
* @param string $name
* the name of the index to be dropped. The name will be properly quoted by the method.
* @param string $table
* the table whose index is to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping an index.
* @since 1.1.6
*/
public function dropIndex($name, $table)
{
return 'DROP INDEX ' . $this->quoteTableName($name);
}
/**
* Resets the sequence value of a table's primary key.
* The sequence will be reset such that the primary key of the next new row inserted
* will have the specified value or 1.
*
* @param CDbTableSchema $table
* the table schema whose primary key sequence will be reset
* @param mixed $value
* the value for the primary key of the next new row inserted. If this is not set,
* the next new row's primary key will have a value 1.
* @since 1.1.13
*/
public function resetSequence($table, $value = 1)
{
$seq = $table->name . "_SEQ";
if ($table->sequenceName !== null) {
$this->db->createCommand("DROP SEQUENCE " . $seq)->execute();
$createSequenceSql = <<< SQL
create sequence $seq
start with $value
increment by 1
nomaxvalue
nocache
SQL;
$this->db->createCommand($createSequenceSql)->execute();
}
}
}
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