added implementation of remove index query

lib/connectors/mysql/query-generator.js

@@ -3,10 +3,6 @@ var Utils = require("../../utils")
 
 module.exports = (function() {
   var QueryGenerator = {
-    /*
-      Returns a query for creating a table.
-      Attributes should have the format: {attributeName: type, attr2: type2} --> {title: 'VARCHAR(255)'}
-    */
     createTableQuery: function(tableName, attributes, options) {
       options = options || {}
 
@@ -121,9 +117,6 @@ module.exports = (function() {
       return Utils._.template(query)(options)
     },
 
-    /*
-      Returns an insert into command. Parameters: table name + hash of attribute-value-pairs.
-    */
     insertQuery: function(tableName, attrValueHash) {
       var query = "INSERT INTO <%= table %> (<%= attributes %>) VALUES (<%= values %>);"
 
@@ -138,16 +131,6 @@ module.exports = (function() {
       return Utils._.template(query)(replacements)
     },
 
-    /*
-      Returns an update query.
-      Parameters:
-        - tableName -> Name of the table
-        - values -> A hash with attribute-value-pairs
-        - where -> A hash with conditions (e.g. {name: 'foo'})
-                   OR an ID as integer
-                   OR a string with conditions (e.g. 'name="foo"').
-                   If you use a string, you have to escape it on your own.
-    */
     updateQuery: function(tableName, values, where) {
       var query = "UPDATE <%= table %> SET <%= values %> WHERE <%= where %>"
       var replacements = {
@@ -161,17 +144,6 @@ module.exports = (function() {
       return Utils._.template(query)(replacements)
     },
 
-    /*
-      Returns a deletion query.
-      Parameters:
-        - tableName -> Name of the table
-        - where -> A hash with conditions (e.g. {name: 'foo'})
-                   OR an ID as integer
-                   OR a string with conditions (e.g. 'name="foo"').
-                   If you use a string, you have to escape it on your own.
-      Options:
-        - limit -> Maximaum count of lines to delete
-    */
     deleteQuery: function(tableName, where, options) {
       options = options || {}
       options.limit = options.limit || 1
@@ -234,9 +206,16 @@ module.exports = (function() {
       })
     },
 
-    /*
-      Takes something and transforms it into values of a where condition.
-    */
+    removeIndexQuery: function(tableName, indexNameOrAttributes) {
+      var sql       = "DROP INDEX <%= indexName %> ON <%= tableName %>"
+        , indexName = indexNameOrAttributes
+
+      if(typeof indexName == 'string')
+        indexName = Utils._.underscored(tableName + '_' + indexNameOrAttributes.join('_'))
+
+      return Utils._.template(sql)({ tableName: tableName, indexName: indexName })
+    },
+
     getWhereConditions: function(smth) {
       var result = null
 
@@ -252,10 +231,6 @@ module.exports = (function() {
       return result
     },
 
-    /*
-      Takes a hash and transforms it into a mysql where condition: {key: value, key2: value2} ==> key=value AND key2=value2
-      The values are transformed by the relevant datatype.
-    */
     hashToWhereConditions: function(hash) {
       return Utils._.map(hash, function(value, key) {
         var _key   = Utils.addTicks(key)

lib/connectors/query-generator.js

@@ -159,7 +159,13 @@ module.exports = (function() {
       throwMethodUndefined('showIndexQuery')
     },
 
-    removeIndexQuery: function(tableName, options) {
+    /*
+      Returns a remove index query.
+      Parameters:
+        - tableName: Name of an existing table.
+        - indexNameOrAttributes: The name of the index as string or an array of attribute names.
+    */
+    removeIndexQuery: function(tableName, indexNameOrAttributes) {
       throwMethodUndefined('removeIndexQuery')
     },