README.md in embulk-output-db2-0.7.6 vs README.md in embulk-output-db2-0.7.7

@@ -29,9 +29,10 @@
 - **column_options**: advanced: a key-value pairs where key is a column name and value is options for the column.
   - **type**: type of a column when this plugin creates new tables (e.g. `VARCHAR(255)`, `INTEGER NOT NULL UNIQUE`). This used when this plugin creates intermediate tables (insert, insert_truncate and merge modes), when it creates the target table (insert_direct, merge_direct and replace modes), and when it creates nonexistent target table automatically. (string, default: depends on input column type. `BIGINT` if input column type is long, `SMALLINT` if boolean, `DOUBLE` if double, `CLOB` if string, `TIMESTAMP` if timestamp)
   - **value_type**: This plugin converts input column type (embulk type) into a database type to build a INSERT statement. This value_type option controls the type of the value in a INSERT statement. (string, default: depends on the sql type of the column. Available values options are: `byte`, `short`, `int`, `long`, `double`, `float`, `boolean`, `string`, `nstring`, `date`, `time`, `timestamp`, `decimal`, `json`, `null`, `pass`)
   - **timestamp_format**: If input column type (embulk type) is timestamp and value_type is `string` or `nstring`, this plugin needs to format the timestamp value into a string. This timestamp_format option is used to control the format of the timestamp. (string, default: `%Y-%m-%d %H:%M:%S.%6N`)
   - **timezone**: If input column type (embulk type) is timestamp, this plugin needs to format the timestamp value into a SQL string. In this cases, this timezone option is used to control the timezone. (string, value of default_timezone option is used by default)
+- **before_load**: if set, this SQL will be executed before loading all records. In truncate_insert mode, the SQL will be executed after truncating. replace mode doesn't support this option.
 - **after_load**: if set, this SQL will be executed after loading all records.
 
 ### Modes
 
 * **insert**: