mysql parser support DIV operator. issue #1526

src/main/java/com/alibaba/druid/sql/ast/expr/SQLBinaryOperator.java

@@ -26,7 +26,8 @@ public enum SQLBinaryOperator {
     BitwiseXor("^", 50), 
     
     Multiply("*", 60), 
-    Divide("/", 60), 
+    Divide("/", 60),
+    DIV("DIV", 60), // mysql integer division
     Modulus("%", 60), 
     Mod("MOD", 60),
     

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlExprParser.java

@@ -87,13 +87,19 @@ public class MySqlExprParser extends SQLExprParser {
     }
 
     public SQLExpr multiplicativeRest(SQLExpr expr) {
-        if (lexer.token() == Token.IDENTIFIER && "MOD".equalsIgnoreCase(lexer.stringVal())) {
+        final Token token = lexer.token();
+        if (token == Token.IDENTIFIER && "MOD".equalsIgnoreCase(lexer.stringVal())) {
             lexer.nextToken();
             SQLExpr rightExp = primary();
 
             rightExp = relationalRest(rightExp);
 
             return new SQLBinaryOpExpr(expr, SQLBinaryOperator.Modulus, rightExp, JdbcConstants.MYSQL);
+        } else if (token == Token.DIV) {
+            lexer.nextToken();
+            SQLExpr rightExp = bitXor();
+            expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.DIV, rightExp, getDbType());
+            expr = multiplicativeRest(expr);
         }
 
         return super.multiplicativeRest(expr);

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlLexer.java

@@ -52,6 +52,7 @@ public class MySqlLexer extends Lexer {
         map.put("ROW", Token.ROW);
         map.put("BEGIN", Token.BEGIN);
         map.put("END", Token.END);
+        map.put("DIV", Token.DIV);
         
         // for oceanbase & mysql 5.7
         map.put("PARTITION", Token.PARTITION);

src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java

@@ -159,17 +159,18 @@ public class SQLExprParser extends SQLParser {
     }
 
     public SQLExpr multiplicativeRest(SQLExpr expr) {
-        if (lexer.token() == Token.STAR) {
+        final Token token = lexer.token();
+        if (token == Token.STAR) {
             lexer.nextToken();
             SQLExpr rightExp = bitXor();
             expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.Multiply, rightExp, getDbType());
             expr = multiplicativeRest(expr);
-        } else if (lexer.token() == Token.SLASH) {
+        } else if (token == Token.SLASH) {
             lexer.nextToken();
             SQLExpr rightExp = bitXor();
             expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.Divide, rightExp, getDbType());
             expr = multiplicativeRest(expr);
-        } else if (lexer.token() == Token.PERCENT) {
+        } else if (token == Token.PERCENT) {
             lexer.nextToken();
             SQLExpr rightExp = bitXor();
             expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.Modulus, rightExp, getDbType());

src/main/java/com/alibaba/druid/sql/parser/Token.java

@@ -142,6 +142,7 @@ public enum Token {
     UNDO("UNDO"),
     SQLSTATE("SQLSTATE"),
     CONDITION("CONDITION"),
+    DIV("DIV"),
     
     //postgresql
     WINDOW("WINDOW"),