Implement CREATE VIEW and DROP VIEW

src/parser/bison_parser.y

@@ -343,6 +343,13 @@ create_statement:
 			$$->tableName = $4;
 			$$->columns = $6;
 		}
+	|	CREATE VIEW opt_not_exists table_name opt_column_list AS select_statement {
+			$$ = new CreateStatement(CreateStatement::kView);
+			$$->ifNotExists = $3;
+			$$->tableName = $4;
+			$$->viewColumns = $5;
+			$$->select = $7;
+		}
 	;
 
 opt_not_exists:
@@ -380,6 +387,10 @@ drop_statement:
 			$$ = new DropStatement(DropStatement::kTable);
 			$$->name = $3;
 		}
+	|	DROP VIEW table_name {
+			$$ = new DropStatement(DropStatement::kView);
+			$$->name = $3;
+		}
 	|	DEALLOCATE PREPARE IDENTIFIER {
 			$$ = new DropStatement(DropStatement::kPreparedStatement);
 			$$->name = $3;

src/sql/CreateStatement.h

@@ -5,9 +5,12 @@
 
 // Note: Implementations of constructors and destructors can be found in statements.cpp.
 namespace hsql {
+  struct SelectStatement;
+
   // Represents definition of a table column
   struct ColumnDefinition {
     enum DataType {
+      UNKNOWN,
       TEXT,
       INT,
       DOUBLE
@@ -26,7 +29,8 @@ namespace hsql {
   struct CreateStatement : SQLStatement {
     enum CreateType {
       kTable,
-      kTableFromTbl // Hyrise file format
+      kTableFromTbl, // Hyrise file format
+      kView
     };
 
     CreateStatement(CreateType type);
@@ -37,6 +41,8 @@ namespace hsql {
     char* filePath; // default: NULL
     char* tableName; // default: NULL
     std::vector<ColumnDefinition*>* columns; // default: NULL
+    std::vector<char*>* viewColumns;
+    SelectStatement* select;
   };
 
 } // namespace hsql

src/sql/statements.cpp

@@ -29,11 +29,14 @@ namespace hsql {
     ifNotExists(false),
     filePath(NULL),
     tableName(NULL),
-    columns(NULL) {};
+    columns(NULL),
+    viewColumns(NULL),
+    select(NULL) {};
 
   CreateStatement::~CreateStatement() {
     free(filePath);
     free(tableName);
+    delete select;
 
     if (columns != NULL) {
       for (ColumnDefinition* def : *columns) {
@@ -41,6 +44,13 @@ namespace hsql {
       }
       delete columns;
     }
+
+    if (viewColumns != NULL) {
+      for (char* column : *viewColumns) {
+        free(column);
+      }
+      delete viewColumns;
+    }
   }
 
   // DeleteStatement

test/queries/tpc-h-11-15.sql

@@ -42,10 +42,10 @@ WHERE L_PARTKEY = P_PARTKEY AND L_SHIPDATE >= '1995-09-01' AND L_SHIPDATE < date
 
 
 -- TPC_H Query 15.1 - Create View for Top Supplier Query 
--- CREATE VIEW REVENUE0 (SUPPLIER_NO, TOTAL_REVENUE) AS
--- SELECT L_SUPPKEY, SUM(L_EXTENDEDPRICE*(1-L_DISCOUNT)) FROM LINEITEM
--- WHERE L_SHIPDATE >= '1996-01-01' AND L_SHIPDATE < dateadd(mm, 3, cast('1996-01-01' as datetime))
--- GROUP BY L_SUPPKEY;
+CREATE VIEW REVENUE0 (SUPPLIER_NO, TOTAL_REVENUE) AS
+SELECT L_SUPPKEY, SUM(L_EXTENDEDPRICE*(1-L_DISCOUNT)) FROM LINEITEM
+WHERE L_SHIPDATE >= '1996-01-01' AND L_SHIPDATE < dateadd(mm, 3, cast('1996-01-01' as datetime))
+GROUP BY L_SUPPKEY;
 
 
 -- TPC_H Query 15.2 - Top Supplier 
@@ -55,5 +55,4 @@ WHERE S_SUPPKEY = SUPPLIER_NO AND TOTAL_REVENUE = (SELECT MAX(TOTAL_REVENUE) FRO
 ORDER BY S_SUPPKEY;
 
 -- TPC_H Query 15.3 - Drop View
--- DROP VIEW REVENUE0;
-
+DROP VIEW REVENUE0;