issue修复：操作符优先级问题导致特定表达式语法解析失败问题修复

src/common/backend/parser/gram.y

@@ -940,6 +940,7 @@ static void setDelimiterName(core_yyscan_t yyscanner, char*input, VariableSetStm
 			END_OF_INPUT
 			END_OF_INPUT_COLON
 			END_OF_PROC
+			NOT_IN
 
 /* Precedence: lowest to highest */
 %nonassoc   COMMENT
@@ -960,7 +961,7 @@ static void setDelimiterName(core_yyscan_t yyscanner, char*input, VariableSetStm
 %nonassoc	ESCAPE
 %nonassoc	OVERLAPS
 %nonassoc	BETWEEN
-%nonassoc	IN_P
+%nonassoc	IN_P NOT_IN
 %left		POSTFIXOP		/* dummy for postfix Op rules */
 /*
  * To support target_el without AS, we must give IDENT an explicit priority
@@ -1646,18 +1647,18 @@ CreateUserStmt:
 					IsValidIdentUsername($3);
 					n->role = $3;
 					n->options = $6;
-					n->missing_ok = false;
-					$$ = (Node *)n;
-					u_sess->parser_cxt.isForbidTruncate = false;
-				}
-			| CREATE USER IF_P NOT EXISTS RoleId opt_with {u_sess->parser_cxt.isForbidTruncate = true;} OptRoleList
-				{
-					CreateRoleStmt *n = makeNode(CreateRoleStmt);
-					n->stmt_type = ROLESTMT_USER;
-					IsValidIdentUsername($6);
-					n->role = $6;
-					n->options = $9;
-					n->missing_ok = true;
+					n->missing_ok = false;
+					$$ = (Node *)n;
+					u_sess->parser_cxt.isForbidTruncate = false;
+				}
+			| CREATE USER IF_P NOT EXISTS RoleId opt_with {u_sess->parser_cxt.isForbidTruncate = true;} OptRoleList
+				{
+					CreateRoleStmt *n = makeNode(CreateRoleStmt);
+					n->stmt_type = ROLESTMT_USER;
+					IsValidIdentUsername($6);
+					n->role = $6;
+					n->options = $9;
+					n->missing_ok = true;
 					$$ = (Node *)n;
 					u_sess->parser_cxt.isForbidTruncate = false;
 				}
@@ -1850,7 +1851,7 @@ CreateGroupStmt:
 					n->stmt_type = ROLESTMT_GROUP;
 					n->role = $3;
 					n->options = $5;
-					n->missing_ok = false;
+					n->missing_ok = false;
 					$$ = (Node *)n;
 				}
 		;
@@ -23861,25 +23862,25 @@ a_expr:		c_expr									{ $$ = $1; }
 						$$ = (Node *) makeSimpleA_Expr(AEXPR_IN, "=", $1, $3, @2);
 					}
 				}
-			| a_expr NOT IN_P in_expr
+			| a_expr NOT_IN in_expr		%prec NOT_IN
 				{
 					/* in_expr returns a SubLink or a list of a_exprs */
-					if (IsA($4, SubLink))
+					if (IsA($3, SubLink))
 					{
 						/* generate NOT (foo = ANY (subquery)) */
 						/* Make an = ANY node */
-						SubLink *n = (SubLink *) $4;
+						SubLink *n = (SubLink *) $3;
 						n->subLinkType = ANY_SUBLINK;
 						n->testexpr = $1;
 						n->operName = list_make1(makeString("="));
-						n->location = @3;
+						n->location = @2;
 						/* Stick a NOT on top */
 						$$ = (Node *) makeA_Expr(AEXPR_NOT, NIL, NULL, (Node *) n, @2);
 					}
 					else
 					{
 						/* generate scalar NOT IN expression */
-						$$ = (Node *) makeSimpleA_Expr(AEXPR_IN, "<>", $1, $4, @2);
+						$$ = (Node *) makeSimpleA_Expr(AEXPR_IN, "<>", $1, $3, @2);
 					}
 				}
 			| a_expr subquery_Op sub_type select_with_parens	%prec Op

src/common/backend/parser/parser.cpp

@@ -231,6 +231,9 @@ int base_yylex(YYSTYPE* lvalp, YYLTYPE* llocp, core_yyscan_t yyscanner)
                 case ENFORCED:
                     cur_token = NOT_ENFORCED;
                     break;
+                case IN_P:
+                    cur_token = NOT_IN;
+                    break;
                 default:
                     /* save the lookahead token for next time */
                     SET_LOOKAHEAD_TOKEN();

src/test/regress/expected/boolean.out

@@ -470,6 +470,12 @@ SELECT 1-2::bool;
         0
 (1 row)
 
+select true >= 'ss' not in (md5('ss'));
+ ?column? 
+----------
+ t
+(1 row)
+
 --
 -- Clean up
 -- Many tables are retained by the regression test, but these do not seem

src/test/regress/sql/boolean.sql

@@ -206,6 +206,8 @@ SELECT -2::bool;
 
 SELECT 1-2::bool;
 
+select true >= 'ss' not in (md5('ss'));
+
 --
 -- Clean up
 -- Many tables are retained by the regression test, but these do not seem