Create table as stmt (#102)

* Unit test for CREATE TEMPORARY TABLE

* Allow CREATE TEMPORARY TABLE in deparse

* Extract method deparse_into_clause

This makes the code a bit more generic

lib/pg_query/deparse.rb

@@ -90,6 +90,10 @@ def deparse_item(item, context = nil) # rubocop:disable Metrics/CyclomaticComple
         deparse_create_function(node)
       when CREATE_STMT
         deparse_create_table(node)
+      when CREATE_TABLE_AS_STMT
+        deparse_create_table_as(node)
+      when INTO_CLAUSE
+        deparse_into_clause(node)
       when DEF_ELEM
         deparse_defelem(node)
       when DELETE_STMT
@@ -681,6 +685,19 @@ def deparse_create_table(node)
       output.join(' ')
     end
 
+    def deparse_create_table_as(node)
+      output = []
+      output << 'CREATE TEMPORARY TABLE'
+      output << deparse_item(node['into'])
+      output << 'AS'
+      output << deparse_item(node['query'])
+      output.join(' ')
+    end
+
+    def deparse_into_clause(node)
+      deparse_item(node['rel'])
+    end
+
     def deparse_when(node)
       output = ['WHEN']
       output << deparse_item(node['expr'])

spec/lib/pg_query/deparse_spec.rb

@@ -805,6 +805,12 @@
 
         it { is_expected.to eq oneline_query }
       end
+
+      context 'temporary table' do
+        let(:query) { 'CREATE TEMPORARY TABLE "temp" AS SELECT "c" FROM "t"' }
+
+        it { is_expected.to eq oneline_query }
+      end
     end
 
     context 'DROP TABLE' do