Fix parsing of negative values (#1419)

Co-authored-by: Agaev Huseyn <h.agaev@vkteam.ru>

src/parser/mod.rs

@@ -7411,6 +7411,7 @@ impl<'a> Parser<'a> {
         }
     }
 
+    /// Parse an unsigned numeric literal
     pub fn parse_number_value(&mut self) -> Result<Value, ParserError> {
         match self.parse_value()? {
             v @ Value::Number(_, _) => Ok(v),
@@ -7422,6 +7423,26 @@ impl<'a> Parser<'a> {
         }
     }
 
+    /// Parse a numeric literal as an expression. Returns a [`Expr::UnaryOp`] if the number is signed,
+    /// otherwise returns a [`Expr::Value`]
+    pub fn parse_number(&mut self) -> Result<Expr, ParserError> {
+        let next_token = self.next_token();
+        match next_token.token {
+            Token::Plus => Ok(Expr::UnaryOp {
+                op: UnaryOperator::Plus,
+                expr: Box::new(Expr::Value(self.parse_number_value()?)),
+            }),
+            Token::Minus => Ok(Expr::UnaryOp {
+                op: UnaryOperator::Minus,
+                expr: Box::new(Expr::Value(self.parse_number_value()?)),
+            }),
+            _ => {
+                self.prev_token();
+                Ok(Expr::Value(self.parse_number_value()?))
+            }
+        }
+    }
+
     fn parse_introduced_string_value(&mut self) -> Result<Value, ParserError> {
         let next_token = self.next_token();
         let location = next_token.location;
@@ -11741,30 +11762,20 @@ impl<'a> Parser<'a> {
         //[ INCREMENT [ BY ] increment ]
         if self.parse_keywords(&[Keyword::INCREMENT]) {
             if self.parse_keywords(&[Keyword::BY]) {
-                sequence_options.push(SequenceOptions::IncrementBy(
+                sequence_options.push(SequenceOptions::IncrementBy(self.parse_number()?, true));
-                    Expr::Value(self.parse_number_value()?),
-                    true,
-                ));
             } else {
-                sequence_options.push(SequenceOptions::IncrementBy(
+                sequence_options.push(SequenceOptions::IncrementBy(self.parse_number()?, false));
-                    Expr::Value(self.parse_number_value()?),
-                    false,
-                ));
             }
         }
         //[ MINVALUE minvalue | NO MINVALUE ]
         if self.parse_keyword(Keyword::MINVALUE) {
-            sequence_options.push(SequenceOptions::MinValue(Some(Expr::Value(
+            sequence_options.push(SequenceOptions::MinValue(Some(self.parse_number()?)));
-                self.parse_number_value()?,
-            ))));
         } else if self.parse_keywords(&[Keyword::NO, Keyword::MINVALUE]) {
             sequence_options.push(SequenceOptions::MinValue(None));
         }
         //[ MAXVALUE maxvalue | NO MAXVALUE ]
         if self.parse_keywords(&[Keyword::MAXVALUE]) {
-            sequence_options.push(SequenceOptions::MaxValue(Some(Expr::Value(
+            sequence_options.push(SequenceOptions::MaxValue(Some(self.parse_number()?)));
-                self.parse_number_value()?,
-            ))));
         } else if self.parse_keywords(&[Keyword::NO, Keyword::MAXVALUE]) {
             sequence_options.push(SequenceOptions::MaxValue(None));
         }
@@ -11772,22 +11783,14 @@ impl<'a> Parser<'a> {
         //[ START [ WITH ] start ]
         if self.parse_keywords(&[Keyword::START]) {
             if self.parse_keywords(&[Keyword::WITH]) {
-                sequence_options.push(SequenceOptions::StartWith(
+                sequence_options.push(SequenceOptions::StartWith(self.parse_number()?, true));
-                    Expr::Value(self.parse_number_value()?),
-                    true,
-                ));
             } else {
-                sequence_options.push(SequenceOptions::StartWith(
+                sequence_options.push(SequenceOptions::StartWith(self.parse_number()?, false));
-                    Expr::Value(self.parse_number_value()?),
-                    false,
-                ));
             }
         }
         //[ CACHE cache ]
         if self.parse_keywords(&[Keyword::CACHE]) {
-            sequence_options.push(SequenceOptions::Cache(Expr::Value(
+            sequence_options.push(SequenceOptions::Cache(self.parse_number()?));
-                self.parse_number_value()?,
-            )));
         }
         // [ [ NO ] CYCLE ]
         if self.parse_keywords(&[Keyword::NO, Keyword::CYCLE]) {

tests/sqlparser_common.rs

@@ -2819,6 +2819,18 @@ fn parse_window_function_null_treatment_arg() {
     );
 }
 
+#[test]
+fn parse_negative_value() {
+    let sql1 = "SELECT -1";
+    one_statement_parses_to(sql1, "SELECT -1");
+
+    let sql2 = "CREATE SEQUENCE name INCREMENT -10 MINVALUE -1000 MAXVALUE 15 START -100;";
+    one_statement_parses_to(
+        sql2,
+        "CREATE SEQUENCE name INCREMENT -10 MINVALUE -1000 MAXVALUE 15 START -100",
+    );
+}
+
 #[test]
 fn parse_create_table() {
     let sql = "CREATE TABLE uk_cities (\

tests/sqlparser_postgres.rs

@@ -277,6 +277,26 @@ fn parse_create_sequence() {
         "CREATE TEMPORARY SEQUENCE IF NOT EXISTS name3 INCREMENT 1 NO MINVALUE MAXVALUE 20 OWNED BY NONE",
     );
 
+    let sql7 = "CREATE SEQUENCE name4
+    AS BIGINT
+    INCREMENT   -15
+    MINVALUE - 2000  MAXVALUE -50
+    START WITH -   60";
+    pg().one_statement_parses_to(
+        sql7,
+        "CREATE SEQUENCE name4 AS BIGINT INCREMENT -15 MINVALUE -2000 MAXVALUE -50 START WITH -60",
+    );
+
+    let sql8 = "CREATE SEQUENCE name5
+    AS BIGINT
+    INCREMENT   +10
+    MINVALUE + 30  MAXVALUE +5000
+    START WITH +   45";
+    pg().one_statement_parses_to(
+        sql8,
+        "CREATE SEQUENCE name5 AS BIGINT INCREMENT +10 MINVALUE +30 MAXVALUE +5000 START WITH +45",
+    );
+
     assert!(matches!(
         pg().parse_sql_statements("CREATE SEQUENCE foo INCREMENT 1 NO MINVALUE NO"),
         Err(ParserError::ParserError(_))