clean up oci driver.

framework/yii/db/oci/ColumnSchema.php

-<?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);
-        }
-    }
-}

framework/yii/db/oci/QueryBuilder.php

 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
 namespace yii\db\oci;
 
-use yii\db\Exception;
 use yii\base\InvalidParamException;
 
 /**
@@ -18,45 +23,35 @@ class QueryBuilder extends \yii\db\QueryBuilder
 		// 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;
+			$this->buildSelect($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),
+		];
 		$this->sql = implode($this->separator, array_filter($clauses));
 
-        if (! is_null($query->limit) && ! is_null($query->offset)) {
+		if ($query->limit !== null || $query->offset !== null) {
 			$this->sql = $this->buildLimit($query->limit, $query->offset);
 		}
-        return [
-            $this->sql,
-            $params
-        ];
-        // return [implode($this->separator, array_filter($clauses)), $params];
+		return [$this->sql, $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;
+			$filters[] = 'rowNumId > ' . (int)$offset;
 		}
 
 		if ($limit >= 0) {
-            $filters[] = 'rownum <= ' . (int) $limit;
+			$filters[] = 'rownum <= ' . (int)$limit;
 		}
 
 		if (count($filters) > 0) {
@@ -75,4 +70,68 @@ FROM PAGINATION
 EOD;
 		return $sql;
 	}
+
+
+	/**
+	 * 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 $newName the new table name. The name will be properly quoted by the method.
+	 * @return string the SQL statement for renaming a DB table.
+	 */
+	public function renameTable($table, $newName)
+	{
+		return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' RENAME TO ' . $this->db->quoteTableName($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 $type the new column type. The {@link getColumnType} method will be invoked to convert abstract column type (if any)
+	 * into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
+	 * For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
+	 * @return string the SQL statement for changing the definition of a column.
+	 */
+	public function alterColumn($table, $column, $type)
+	{
+		$type = $this->getColumnType($type);
+		return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' MODIFY ' . $this->db->quoteColumnName($column) . ' ' . $this->getColumnType($type);
+	}
+
+	/**
+	 * 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 $table the table whose index is to be dropped. The name will be properly quoted by the method.
+	 * @return string the SQL statement for dropping an index.
+	 */
+	public function dropIndex($name, $table)
+	{
+		return 'DROP INDEX ' . $this->db->quoteTableName($name);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function resetSequence($table, $value = null)
+	{
+		$tableSchema = $this->db->getTableSchema($table);
+		if ($tableSchema === null) {
+			throw new InvalidParamException("Unknown table: $table");
+		}
+		if ($tableSchema->sequenceName === null) {
+			return '';
+		}
+
+		if ($value !== null) {
+			$value = (int)$value;
+		} else {
+			$value = (int)$this->db->createCommand("SELECT MAX(\"{$tableSchema->primaryKey}\") FROM \"{$tableSchema->name}\"")->queryScalar();
+			$value++;
+		}
+		return "DROP SEQUENCE \"{$tableSchema->name}_SEQ\";"
+			. "CREATE SEQUENCE \"{$tableSchema->name}_SEQ\" START WITH {$value} INCREMENT BY 1 NOMAXVALUE NOCACHE";
+	}
 }