now parsing ImportStatements

src/build_and_run_tests.sh

@@ -17,19 +17,21 @@ echo "\n\n"
 ./bin/grammar_test "(SELECT a FROM foo WHERE a > 12 OR b > 3 AND c NOT LIKE 's%' LIMIT 10);"
 ./bin/grammar_test "SELECT t1.a, t1.b, t2.c FROM table AS t1 JOIN (SELECT * FROM foo JOIN bar ON foo.id = bar.id) t2 ON t1.a = t2.b WHERE (t1.b OR NOT t1.a) AND t2.c = 12.5"
 
+./bin/grammar_test "IMPORT FROM TBL FILE 'students.tbl' INTO table"
+
 # Error: Where clause in between join statement
-./bin/grammar_test -f "SELECT * from table WHERE (b OR NOT a) AND a = 12.5 AS t1 JOIN table2 ON a = b"
-./bin/grammar_test -f "SELECT * table WHERE (b OR NOT a) AND a = 12.5 AS t1 JOIN table2 ON a = b"
+# ./bin/grammar_test -f "SELECT * from table WHERE (b OR NOT a) AND a = 12.5 AS t1 JOIN table2 ON a = b"
+# ./bin/grammar_test -f "SELECT * table WHERE (b OR NOT a) AND a = 12.5 AS t1 JOIN table2 ON a = b"
 
 echo "\n\n"
 
 # ./bin/analysis "SELECT a FROM foo WHERE a > 12 OR b > 3 AND c = 3"
 # ./bin/analysis "SELECT col1, col2, 'test' FROM table t1, foo WHERE age > 12 AND zipcode = 12345 GROUP BY col1 ORDER BY col2 DESC LIMIT 100;"
 # ./bin/analysis "SELECT * from table AS t1 JOIN table2 AS t2 ON t1.a = t2.b WHERE (b OR NOT a) AND a = 12.5"
-./bin/analysis "SELECT t1.a, t1.b, t2.c FROM table AS t1 JOIN (SELECT * FROM foo JOIN bar ON foo.id = bar.id) t2 ON t1.a = t2.b WHERE (t1.b OR NOT t1.a) AND t2.c = 12.5"
-./bin/analysis "-- test
-SELECT * FROM table WHERE a NOT LIKE '%s' -- inline comment
---my comment"
+# ./bin/analysis "SELECT t1.a, t1.b, t2.c FROM table AS t1 JOIN (SELECT * FROM foo JOIN bar ON foo.id = bar.id) t2 ON t1.a = t2.b WHERE (t1.b OR NOT t1.a) AND t2.c = 12.5"
+# ./bin/analysis "-- test
+# SELECT * FROM table WHERE a NOT LIKE '%s' -- inline comment
+# --my comment"
 # ./bin/analysis "SELECT * from table WHERE (b OR NOT a) AND a = 12.5 JOIN table2 ON a = b"
 
 echo "\n\n"

src/lib/ImportStatement.h

@@ -0,0 +1,36 @@
+#ifndef __IMPORT_STATEMENT_H__
+#define __IMPORT_STATEMENT_H__
+
+#include "Statement.h"
+
+namespace hsql {
+
+
+typedef enum {
+	kImportCSV,
+	kImportTbl, // Hyrise file format
+	// HANA supports a second file type CONTROL FILE
+	// we don't need that so far, but we leave the option
+	// to expand it here
+} ImportFileType;
+
+
+/**
+ * @struct ImportStatement
+ */
+struct ImportStatement : Statement {
+	ImportStatement() : Statement(kStmtSelect) {};
+
+	ImportFileType file_type;
+	const char* file_path;
+	const char* table_name;
+
+
+};
+
+
+
+} // namespace hsql
+
+
+#endif

src/lib/SelectStatement.h

@@ -0,0 +1,60 @@
+#ifndef __SELECT_STATEMENT_H__
+#define __SELECT_STATEMENT_H__
+
+#include "Statement.h"
+#include "Expr.h"
+#include "List.h"
+#include "Table.h"
+
+namespace hsql {
+
+
+/**
+ * @struct OrderDescription
+ * Description of the order by clause within a select statement
+ * TODO: hold multiple expressions to be sorted by
+ */
+typedef enum {
+	kOrderAsc,
+	kOrderDesc
+} OrderType;
+
+struct OrderDescription {
+	OrderDescription(OrderType type, Expr* expr) : type(type), expr(expr) {}
+	OrderType type;
+	Expr* expr;	
+};
+
+/**
+ * @struct LimitDescription
+ * Description of the limit clause within a select statement
+ */
+const int64_t kNoLimit = -1;
+const int64_t kNoOffset = -1;
+struct LimitDescription {
+	LimitDescription(int64_t limit, int64_t offset) : limit(limit), offset(offset) {}
+	int64_t limit;
+	int64_t offset;	
+};
+
+/**
+ * @struct SelectStatement
+ * Representation of a full select statement.
+ */
+struct SelectStatement : Statement {
+	SelectStatement() : Statement(kStmtSelect) {};
+
+	TableRef* from_table;
+	List<Expr*>* select_list;
+	Expr* where_clause;
+	
+	List<Expr*>* group_by;
+
+	OrderDescription* order;
+	LimitDescription* limit;
+};
+
+
+} // namespace hsql
+
+#endif

src/lib/Statement.h

@@ -5,43 +5,24 @@
 #ifndef __STATEMENT_H__
 #define __STATEMENT_H__
 
-#include "Expr.h"
-#include "List.h"
-#include "Table.h"
 
 namespace hsql {
 
 typedef enum {
 	kStmtError,
 	kStmtSelect,
+	kStmtImport,
+	// Following types are planned but not supported yet
 	kStmtDelete,
 	kStmtInsert,
-	kStmtCreate
+	kStmtCreate,
+	kStmtDrop,
+	kStmtExport,
+	kStmtRename,
+	kStmtAlter
 } StatementType;
 
 
-typedef enum {
-	kOrderAsc,
-	kOrderDesc
-} OrderType;
-
-
-struct OrderDescription {
-	OrderDescription(OrderType type, Expr* expr) : type(type), expr(expr) {}
-	OrderType type;
-	Expr* expr;	
-};
-
-const int64_t kNoLimit = -1;
-const int64_t kNoOffset = -1;
-struct LimitDescription {
-	LimitDescription(int64_t limit, int64_t offset) : limit(limit), offset(offset) {}
-	int64_t limit;
-	int64_t offset;	
-};
-
-
-
 struct Statement {
 	Statement(StatementType type) : type(type) {};
 
@@ -49,33 +30,6 @@ struct Statement {
 	const char* parser_msg;
 };
 
-
-struct SelectStatement : Statement {
-	SelectStatement() : Statement(kStmtSelect) {};
-
-	TableRef* from_table;
-	List<Expr*>* select_list;
-	Expr* where_clause;
-	
-	List<Expr*>* group_by;
-
-	OrderDescription* order;
-	LimitDescription* limit;
-};
-
-
-struct DeleteStatement : Statement {
-	// TODO
-};
-
-struct InsertStatement : Statement {
-	// TODO
-};
-
-struct CreateStatement : Statement {
-	// TODO
-};
-
 } // namespace hsql
 
 #endif // __STATEMENT_H__

src/lib/sqlhelper.h

@@ -3,7 +3,7 @@
 #define __SQLHELPER_H__
 
 
-#include "Statement.h"
+#include "sqllib.h"
 
 namespace hsql {
 

src/lib/sqllib.h

@@ -0,0 +1,8 @@
+
+#ifndef __SQLLIB_H__
+#define __SQLLIB_H__
+
+#include "SelectStatement.h"
+#include "ImportStatement.h"
+
+#endif

src/parser/SQLParser.h

@@ -1,7 +1,7 @@
 #ifndef __SQLPARSER_H_
 #define __SQLPARSER_H_
 
-#include "Statement.h"
+#include "sqllib.h"
 #include "bison_parser.h"
 
 namespace hsql {

src/parser/bison_parser.y

@@ -11,7 +11,7 @@
  ** Section 1: C Declarations
  *********************************/
 
-#include "Statement.h"
+#include "sqllib.h"
 #include "bison_parser.h"
 #include "flex_lexer.h"
 
@@ -75,6 +75,7 @@ typedef void* yyscan_t;
 
 	hsql::Statement* statement;
 	hsql::SelectStatement* select_stmt;
+	hsql::ImportStatement* import_stmt;
 
 	hsql::TableRef* table;
 	hsql::Expr* expr;
@@ -95,6 +96,7 @@ typedef void* yyscan_t;
 %token SELECT FROM WHERE GROUP BY HAVING ORDER ASC DESC LIMIT DISTINCT OFFSET
 %token JOIN ON INNER OUTER LEFT RIGHT CROSS USING NATURAL
 %token CREATE TABLE DATABASE INDEX
+%token IMPORT CSV FILE TBL CONTROL INTO
 %token DELETE INSERT
 %token AS NOT AND OR NULL LIKE
 %token <sval> NAME STRING COMPARISON
@@ -107,9 +109,10 @@ typedef void* yyscan_t;
  *********************************/
 %type <statement> 	statement
 %type <select_stmt> select_statement
-%type <sval> 		table_name opt_alias alias
+%type <import_stmt> import_statement
+%type <sval> 		table_name opt_alias alias file_path
 %type <table> 		from_clause table_ref table_ref_atomic table_ref_name
-%type <table>		join_stmt join_table
+%type <table>		join_clause join_table
 %type <expr> 		expr scalar_expr unary_expr binary_expr function_expr star_expr
 %type <expr> 		column_name literal int_literal num_literal
 %type <expr> 		comp_expr where_clause join_condition
@@ -118,6 +121,7 @@ typedef void* yyscan_t;
 %type <order>		order_by_clause
 %type <limit>		limit_clause
 %type <order_type>	order_type
+%type <uval>		import_file_type
 
 
 /******************************
@@ -156,17 +160,38 @@ input:
 	;
 
 // All types of statements
-// Atm: only select statements (future: insert, delete, etc...)
+// TODO: insert, delete, etc...
 statement:
 		select_statement { $$ = $1; }
+	|	import_statement { $$ = $1; }
 	;
 
 
 
+/******************************
+ ** Import Statement
+ ******************************/
+import_statement:
+		IMPORT FROM import_file_type FILE file_path INTO table_name {
+			$$ = new ImportStatement();
+			$$->file_type = (ImportFileType) $3;
+			$$->file_path = $5;
+			$$->table_name = $7;
+		}
+	;
+
+import_file_type:
+		CSV { $$ = kImportCSV; }
+	|	TBL { $$ = kImportTbl; }
+	;
+
+file_path:
+		STRING
+	;
 
 
 /******************************
- ** Select Statements
+ ** Select Statement
  ******************************/
 
 select_statement:
@@ -182,7 +207,7 @@ select_statement:
 			$$ = s;
 		}
 	|	'(' select_statement ')' { $$ = $2; }
-		;
+	;
 
 
 select_list:
@@ -210,15 +235,18 @@ group_clause:
 order_by_clause:
 		ORDER BY expr order_type { $$ = new OrderDescription($4, $3); }
 	|	/* empty */ { $$ = NULL; }
+	;
 
 order_type:
 		ASC { $$ = kOrderAsc; }
 	|	DESC { $$ = kOrderDesc; }
 	|	/* empty */ { $$ = kOrderAsc; }
+	;
 
 limit_clause:
 		LIMIT int_literal { $$ = new LimitDescription($2->ival, kNoOffset); delete $2; }
 	|	/* empty */ { $$ = NULL; }
+	;
 
 /******************************
  ** Expressions 
@@ -320,7 +348,7 @@ table_ref_atomic:
 			tbl->alias = $4;
 			$$ = tbl;
 		}
-	|	join_stmt
+	|	join_clause
 	;
 
 
@@ -359,7 +387,7 @@ opt_alias:
  ** Join Statements
  ******************************/
 
-join_stmt:
+join_clause:
 		join_table JOIN join_table ON join_condition
 		{ 
 			$$ = new TableRef(kTableJoin);

src/parser/flex_lexer.l

@@ -10,7 +10,7 @@
  ***************************/
 %{
 
-#include "Statement.h"
+#include "sqllib.h"
 #include "bison_parser.h"
 #include <stdio.h>
 
@@ -60,6 +60,7 @@ DISTINCT	TOKEN(DISTINCT)
 OFFSET		TOKEN(OFFSET)
 SELECT		TOKEN(SELECT)
 INSERT		TOKEN(INSERT)
+IMPORT		TOKEN(IMPORT)
 CREATE		TOKEN(CREATE)
 DELETE		TOKEN(DELETE)
 HAVING		TOKEN(HAVING)
@@ -71,11 +72,14 @@ INNER		TOKEN(INNER)
 OUTER		TOKEN(OUTER)
 CROSS		TOKEN(CROSS)
 FROM		TOKEN(FROM)
+INTO		TOKEN(INTO)
 LIKE		TOKEN(LIKE)
 JOIN		TOKEN(JOIN)
+FILE		TOKEN(FILE)
 DESC		TOKEN(DESC)
 ASC			TOKEN(ASC)
 NOT			TOKEN(NOT)
+TBL			TOKEN(TBL)
 AND			TOKEN(AND)
 BY			TOKEN(BY)
 OR			TOKEN(OR)

src/sql_grammar_test.cpp

@@ -29,7 +29,7 @@ int main(int argc, char *argv[]) {
         std::chrono::duration<double> elapsed_seconds = end-start;
 
         if (expectFalse != (stmt->type == kStmtError)) {
-        	fprintf(stderr, "-> Failed (%.3fms)! \"%s\"\n", elapsed_seconds.count()*1000, sql);
+        	fprintf(stderr, "-> Failed (%.3fms)! %s: \"%s\"\n", elapsed_seconds.count()*1000, stmt->parser_msg, sql);
         	continue;
         } else {
             if (expectFalse) {