improved sql parser pg json operation support. #1592

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

@@ -37,8 +37,11 @@ public enum SQLBinaryOperator {
     SubGt("->", 20), 
     SubGtGt("->>", 20), 
     PoundGt("#>", 20), 
-    PoundGtGt("#>>", 20), 
-    
+    PoundGtGt("#>>", 20),
+    QuesQues("??", 20),
+    QuesBar("?|", 20),
+    QuesAmp("?&", 20),
+
     LeftShift("<<", 80), 
     RightShift(">>", 80), 
 

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

@@ -450,7 +450,18 @@ public class Lexer {
                     return;
                 case '?':
                     scanChar();
-                    token = Token.QUES;
+                    if (ch == '?') {
+                        scanChar();
+                        token = Token.QUESQUES;
+                    } else if (ch == '|') {
+                        scanChar();
+                        token = Token.QUESBAR;
+                    } else if (ch == '&') {
+                        scanChar();
+                        token = Token.QUESAMP;
+                    } else {
+                        token = Token.QUES;
+                    }
                     return;
                 case ';':
                     scanChar();

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

@@ -139,6 +139,21 @@ public class SQLExprParser extends SQLParser {
             SQLExpr rightExp = primary();
             expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.PoundGtGt, rightExp, getDbType());
             expr = bitXorRest(expr);
+        } else if (token == Token.QUESQUES) {
+            lexer.nextToken();
+            SQLExpr rightExp = primary();
+            expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.QuesQues, rightExp, getDbType());
+            expr = bitXorRest(expr);
+        } else if (token == Token.QUESBAR) {
+            lexer.nextToken();
+            SQLExpr rightExp = primary();
+            expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.QuesBar, rightExp, getDbType());
+            expr = bitXorRest(expr);
+        } else if (token == Token.QUESAMP) {
+            lexer.nextToken();
+            SQLExpr rightExp = primary();
+            expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.QuesAmp, rightExp, getDbType());
+            expr = bitXorRest(expr);
         }
 
         return expr;

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

@@ -305,7 +305,10 @@ public enum Token {
     TILDE("~"),
     TILDE_STAR("~*"),
     TILDE_EQ("~="),
-    QUES("?"), 
+    QUES("?"),
+    QUESQUES("?？"),
+    QUESBAR("?|"),
+    QUESAMP("?&"),
     COLON(":"), 
     COLONCOLON("::"), 
     COLONEQ(":="),