added support for comments and like operator

src/build_and_run_tests.sh

@@ -13,7 +13,8 @@ echo "\n\n"
 ./bin/grammar_test "SELECT col1, col2, 'test' FROM table, foo AS t WHERE age > 12 AND zipcode = 12345 GROUP BY col1;"
 ./bin/grammar_test "SELECT age FROM table AS t1, (SELECT * FROM table2) AS t2 ORDER BY age DESC"
 ./bin/grammar_test "SELECT * from table JOIN table2 ON a = b WHERE (b OR NOT a) AND a = 12.5"
-./bin/grammar_test "(SELECT a FROM foo WHERE a > 12 OR b > 3 AND c = 3 LIMIT 10);"
+./bin/grammar_test "(SELECT a FROM foo WHERE a > 12 OR b > 3 AND c LIKE 's%' LIMIT 10);"
+./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"
 
 # Error: Where clause in between join statement
@@ -26,6 +27,9 @@ echo "\n\n"
 # ./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 * from table WHERE (b OR NOT a) AND a = 12.5 JOIN table2 ON a = b"
 
 echo "\n\n"

src/lib/Expr.h

@@ -33,6 +33,7 @@ struct Expr {
 		LESS_EQ,
 		GREATER_EQ,
 		LIKE,
+		NOT_LIKE,
 		AND,
 		OR,
 		// Unary

src/parser/bison_parser.y

@@ -92,9 +92,10 @@ typedef void* yyscan_t;
 /*********************************
  ** Token Definition
  *********************************/
-%token SELECT FROM WHERE GROUP BY HAVING ORDER ASC DESC LIMIT
+%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 DELETE INSERT
 %token AS NOT AND OR NULL LIKE
 %token <sval> NAME STRING COMPARISON
 %token <fval> FLOAT
@@ -126,7 +127,7 @@ typedef void* yyscan_t;
 %left		OR
 %left		AND
 %right		NOT
-%right		'=' EQUALS NOTEQUALS
+%right		'=' EQUALS NOTEQUALS LIKE
 %nonassoc	'<' '>' LESS GREATER LESSEQ GREATEREQ
 
 %nonassoc	NOTNULL
@@ -255,6 +256,8 @@ binary_expr:
 	|	expr '*' expr	{ $$ = Expr::makeOpBinary($1, '*', $3); }
 	|	expr AND expr	{ $$ = Expr::makeOpBinary($1, Expr::AND, $3); }
 	|	expr OR expr	{ $$ = Expr::makeOpBinary($1, Expr::OR, $3); }
+	|	expr LIKE expr	{ $$ = Expr::makeOpBinary($1, Expr::LIKE, $3); }
+	|	expr NOT LIKE expr	{ $$ = Expr::makeOpBinary($1, Expr::NOT_LIKE, $4); }
 	;
 
 

src/parser/flex_lexer.l

@@ -41,31 +41,48 @@
 /* %option nodefault */
 
 
+%s COMMENT
 
 /***************************
  ** Section 3: Rules
  ***************************/
 %%
 
+--				BEGIN(COMMENT);
+<COMMENT>[^\n]*	/* skipping comment content until a end of line is read */;
+<COMMENT>\n 	BEGIN(INITIAL);
+
+
 [ \t\n]+	/* skip whitespace */;
 
-SELECT	TOKEN(SELECT)
-FROM	TOKEN(FROM)
-GROUP	TOKEN(GROUP)
-BY		TOKEN(BY)
-WHERE	TOKEN(WHERE)
-NOT		TOKEN(NOT)
-AND		TOKEN(AND)
-OR		TOKEN(OR)
-AS		TOKEN(AS)
 
+DISTINCT	TOKEN(DISTINCT)
+OFFSET		TOKEN(OFFSET)
+SELECT		TOKEN(SELECT)
+INSERT		TOKEN(INSERT)
+CREATE		TOKEN(CREATE)
+DELETE		TOKEN(DELETE)
+HAVING		TOKEN(HAVING)
+GROUP		TOKEN(GROUP)
+WHERE		TOKEN(WHERE)
 LIMIT		TOKEN(LIMIT)
 ORDER		TOKEN(ORDER)
-ASC		TOKEN(ASC)
+INNER		TOKEN(INNER)
-DESC	TOKEN(DESC)
+OUTER		TOKEN(OUTER)
+CROSS		TOKEN(CROSS)
+FROM		TOKEN(FROM)
+LIKE		TOKEN(LIKE)
 JOIN		TOKEN(JOIN)
+DESC		TOKEN(DESC)
+ASC			TOKEN(ASC)
+NOT			TOKEN(NOT)
+AND			TOKEN(AND)
+BY			TOKEN(BY)
+OR			TOKEN(OR)
+AS			TOKEN(AS)
 ON			TOKEN(ON)
 
+
 "="		TOKEN(EQUALS)
 "<>" 	TOKEN(NOTEQUALS)
 "<"		TOKEN(LESS)