add "drop table" to query runner

src/driver/mongodb/MongoQueryRunner.ts

@@ -435,6 +435,13 @@ export class MongoQueryRunner implements QueryRunner {
         throw new Error(`Schema update queries are not supported by MongoDB driver.`);
     }
 
+    /**
+     * Drops the table.
+     */
+    async dropTable(tableName: string): Promise<void> {
+        throw new Error(`Schema update queries are not supported by MongoDB driver.`);
+    }
+
     /**
      * Checks if column with the given name exist in the given table.
      */

src/driver/mysql/MysqlQueryRunner.ts

@@ -359,6 +359,14 @@ export class MysqlQueryRunner implements QueryRunner {
         await this.query(sql);
     }
 
+    /**
+     * Drop the table.
+     */
+    async dropTable(tableName: String): Promise<void> {
+        let sql = `DROP TABLE \`${tableName}\``;
+        await this.query(sql);
+    }
+
     /**
      * Checks if column with the given name exist in the given table.
      */

src/driver/oracle/OracleQueryRunner.ts

@@ -388,6 +388,14 @@ AND cons.constraint_name = cols.constraint_name AND cons.owner = cols.owner ORDE
         await this.query(sql);
     }
 
+    /**
+     * Drops the table.
+     */
+    async dropTable(tableName: string): Promise<void> {
+        let sql = `DROP TABLE "${tableName}"`;
+        await this.query(sql);
+    }
+
     /**
      * Checks if column with the given name exist in the given table.
      */

src/driver/postgres/PostgresQueryRunner.ts

@@ -373,6 +373,14 @@ where constraint_type = 'PRIMARY KEY' AND c.table_schema = '${this.schemaName}'
         await this.query(sql);
     }
 
+    /**
+     * Drops the table.
+     */
+    async dropTable(tableName: string): Promise<void> {
+        let sql = `DROP TABLE "${tableName}"`;
+        await this.query(sql);
+    }
+
     /**
      * Checks if column with the given name exist in the given table.
      */

src/driver/sqlite/SqliteQueryRunner.ts

@@ -399,6 +399,14 @@ export class SqliteQueryRunner implements QueryRunner {
         await this.query(sql);
     }
 
+    /**
+     * Drops the table.
+     */
+    async dropTable(tableName: string): Promise<void> {
+        let sql = `DROP TABLE "${tableName}"`;
+        await this.query(sql);
+    }
+
     /**
      * Checks if column with the given name exist in the given table.
      */

src/driver/sqlserver/SqlServerQueryRunner.ts

@@ -445,6 +445,14 @@ export class SqlServerQueryRunner implements QueryRunner {
         await this.query(sql);
     }
 
+    /**
+     * Drops the table.
+     */
+    async dropTable(tableName: string): Promise<void> {
+        let sql = `DROP TABLE "${tableName}"`;
+        await this.query(sql);
+    }
+
     /**
      * Checks if column with the given name exist in the given table.
      */

src/driver/websql/WebsqlQueryRunner.ts

@@ -409,6 +409,14 @@ export class WebsqlQueryRunner implements QueryRunner {
         await this.query(sql);
     }
 
+    /**
+     * Drops the table.
+     */
+    async dropTable(tableName: string): Promise<void> {
+        let sql = `DROP TABLE "${tableName}"`;
+        await this.query(sql);
+    }
+
     /**
      * Checks if column with the given name exist in the given table.
      */

src/query-runner/QueryRunner.ts

@@ -106,6 +106,11 @@ export interface QueryRunner {
      */
     createTable(table: TableSchema): Promise<void>;
 
+    /**
+     * Drops the table.
+     */
+    dropTable(tableName: string): Promise<void>;
+
     /**
      * Checks if column with the given name exist in the given table.
      */