Integrated the lookup and ran cs-fixer

Author: sebprt

README.md

@@ -0,0 +1,93 @@
+# SQL Plugin
+
+This plugin allows you to retrieve or insert data from/to a database.
+
+## Installation
+
+```
+composer require php-etl/sql-plugin
+```
+
+## Basic usage
+
+### Building an extractor
+```yaml
+sql:
+  extractor:
+    query: 'SELECT * FROM table1'
+    connection:
+      dsn: 'mysql:host=127.0.0.1;port=3306;dbname=kiboko'
+      username: username
+      password: password
+```
+### Building a lookup
+
+```yaml
+sql:
+  lookup:
+    query: 'SELECT * FROM table2 WHERE bar = foo'
+    connection:
+      dsn: 'mysql:host=127.0.0.1;port=3306;dbname=kiboko'
+      username: username
+      password: password
+    merge:
+      map:
+        - field: '[options]'
+          expression: 'lookup["name"]'
+
+```
+
+### Building a loader
+```yaml
+sql:
+  loader:
+    query: 'INSERT INTO table1 VALUES (bar, foo, barfoo)'
+    connection:
+      dsn: 'mysql:host=127.0.0.1;port=3306;dbname=kiboko'
+      username: username
+      password: password
+
+```
+
+## Advanced Usage : using params in your queries
+
+Thanks to the SQL plugin, it is possible to write your queries with parameters.
+
+### With params
+
+If you write a prepared statement using named parameters (`:param`), your parameter key in the configuration will be 
+the name of your parameter without the `:` :
+
+```yaml
+sql:
+  # ... 
+  query: 'INSERT INTO table1 VALUES (:value1, :value2, :value3)'
+  params:
+    - key: value1
+      value: '@=input["value1"]'
+    - key: value2
+      value: '@=input["value3"]'
+    - key: value3
+      value: '@=input["value3"]'
+    # ... 
+```
+
+If you are using a prepared statement using interrogative markers (`?`), your parameter key in the
+configuration will be its position (starting from 1) :
+
+```yaml
+sql:
+  # ... 
+  query: 'INSERT INTO table1 VALUES (?, ?, ?)'
+  params:
+    - key: 1
+      value: '@=input["value1"]'
+    - key: 2
+      value: '@=input["value3"]'
+    - key: 3
+      value: '@=input["value3"]'
+  # ... 
+```
+
+## See more
+If you want to see complete configurations, please go to the [examples](/examples) folder.

composer.json

@@ -43,6 +43,9 @@
     },
     "require-dev": {
         "symfony/console": "^5.2",
-        "symfony/yaml": "^5.2"
+        "symfony/yaml": "^5.2",
+        "phpunit/phpunit": "^9.0",
+        "php-etl/phpunit-extension": "^0.2.0",
+        "adlawson/vfs": "^0.12.1"
     }
 }