Added support for casting to DATE

src/parser/bison_parser.y

@@ -562,6 +562,7 @@ column_type:
 	|	CHAR '(' INTVAL ')' { $$ = ColumnType{DataType::CHAR, $3}; }
 	|	TEXT { $$ = ColumnType{DataType::TEXT}; }
 	|	DATETIME { $$ = ColumnType{DataType::DATETIME}; }
+	|	DATE { $$ = ColumnType{DataType::DATE}; }
 	;
 
 opt_column_nullable:

src/sql/ColumnType.h

@@ -13,7 +13,8 @@ namespace hsql {
     CHAR,
     VARCHAR,
     TEXT,
-    DATETIME
+    DATETIME,
+    DATE
   };
 
   // Represents the type of a column, e.g., FLOAT or VARCHAR(10)

src/sql/statements.cpp

@@ -57,6 +57,9 @@ namespace hsql {
       case DataType::DATETIME:
         stream << "DATETIME";
         break;
+      case DataType::DATE:
+        stream << "DATE";
+        break;
     }
     return stream;
   }

test/select_tests.cpp

@@ -738,3 +738,17 @@ TEST(WithClauseDouble) {
   ASSERT_STREQ(stmt->selectList->at(0)->name, "nameA");
   ASSERT_STREQ(stmt->fromTable->name, "a");
 }
+
+TEST(CastAsDate) {
+  TEST_PARSE_SINGLE_SQL(
+       "SELECT CAST(ID AS DATE) FROM TEST",
+        kStmtSelect,
+        SelectStatement,
+        result,
+        stmt);
+
+  ASSERT_TRUE(result.isValid());
+  ASSERT_EQ(1, stmt->selectList->size());
+  ASSERT_STREQ("CAST", stmt->selectList->front()->name);
+  ASSERT_EQ(DataType::DATE, stmt->selectList->front()->columnType.data_type);
+}