Add support for ASC and DESC in CREATE TABLE column constraints for SQLite. (#1462)

src/dialect/generic.rs

@@ -103,4 +103,8 @@ impl Dialect for GenericDialect {
     fn supports_limit_comma(&self) -> bool {
         true
     }
+
+    fn supports_asc_desc_in_column_definition(&self) -> bool {
+        true
+    }
 }

src/dialect/mod.rs

@@ -557,6 +557,10 @@ pub trait Dialect: Debug + Any {
     fn supports_explain_with_utility_options(&self) -> bool {
         false
     }
+
+    fn supports_asc_desc_in_column_definition(&self) -> bool {
+        false
+    }
 }
 
 /// This represents the operators for which precedence must be defined

src/dialect/sqlite.rs

@@ -77,4 +77,8 @@ impl Dialect for SQLiteDialect {
     fn supports_limit_comma(&self) -> bool {
         true
     }
+
+    fn supports_asc_desc_in_column_definition(&self) -> bool {
+        true
+    }
 }

src/parser/mod.rs

@@ -6192,6 +6192,20 @@ impl<'a> Parser<'a> {
             Ok(Some(ColumnOption::DialectSpecific(vec![
                 Token::make_keyword("AUTOINCREMENT"),
             ])))
+        } else if self.parse_keyword(Keyword::ASC)
+            && self.dialect.supports_asc_desc_in_column_definition()
+        {
+            // Support ASC for SQLite
+            Ok(Some(ColumnOption::DialectSpecific(vec![
+                Token::make_keyword("ASC"),
+            ])))
+        } else if self.parse_keyword(Keyword::DESC)
+            && self.dialect.supports_asc_desc_in_column_definition()
+        {
+            // Support DESC for SQLite
+            Ok(Some(ColumnOption::DialectSpecific(vec![
+                Token::make_keyword("DESC"),
+            ])))
         } else if self.parse_keywords(&[Keyword::ON, Keyword::UPDATE])
             && dialect_of!(self is MySqlDialect | GenericDialect)
         {