Snowflake: Add support for text data type modifiers

Author: yoavcloud

src/dialect/mod.rs

@@ -1451,6 +1451,16 @@ pub trait Dialect: Debug + Any {
         false
     }
 
+    /// Returns true if the dialect supports parenthesized modifiers for the `TEXT` data type.
+    ///
+    /// Example:
+    /// ```sql
+    /// SELECT col::TEXT(16777216)
+    /// ```
+    fn supports_text_type_modifiers(&self) -> bool {
+        false
+    }
+
     /// Returns true if the dialect supports the `INTERVAL` data type with [Postgres]-style options.
     ///
     /// Examples:

src/dialect/snowflake.rs

@@ -235,6 +235,11 @@ impl Dialect for SnowflakeDialect {
         true
     }
 
+    /// See [doc](https://docs.snowflake.com/en/sql-reference/data-types-text)
+    fn supports_text_type_modifiers(&self) -> bool {
+        true
+    }
+
     /// See [doc](https://docs.snowflake.com/en/sql-reference/constructs/from)
     fn supports_parens_around_table_factor(&self) -> bool {
         true

src/parser/mod.rs

@@ -12555,7 +12555,20 @@ impl<'a> Parser<'a> {
                     self.expect_token(&Token::RParen)?;
                     Ok(DataType::FixedString(character_length))
                 }
-                Keyword::TEXT => Ok(DataType::Text),
+                Keyword::TEXT => {
+                    if dialect.supports_text_type_modifiers() {
+                        if let Some(modifiers) = self.parse_optional_type_modifiers()? {
+                            Ok(DataType::Custom(
+                                ObjectName::from(vec![Ident::new("TEXT")]),
+                                modifiers,
+                            ))
+                        } else {
+                            Ok(DataType::Text)
+                        }
+                    } else {
+                        Ok(DataType::Text)
+                    }
+                }
                 Keyword::TINYTEXT => Ok(DataType::TinyText),
                 Keyword::MEDIUMTEXT => Ok(DataType::MediumText),
                 Keyword::LONGTEXT => Ok(DataType::LongText),

tests/sqlparser_common.rs

@@ -6586,6 +6586,25 @@ fn interval_disallow_interval_expr_double_colon() {
     )
 }
 
+#[test]
+fn parse_text_type_modifier_double_colon_cast() {
+    let dialects = all_dialects_where(|d| d.supports_text_type_modifiers());
+    let expr = dialects.verified_expr("_ID::TEXT(16777216)");
+    assert_eq!(
+        expr,
+        Expr::Cast {
+            kind: CastKind::DoubleColon,
+            expr: Box::new(Expr::Identifier(Ident::new("_ID"))),
+            data_type: DataType::Custom(
+                ObjectName::from(vec![Ident::new("TEXT")]),
+                vec!["16777216".to_string()]
+            ),
+            array: false,
+            format: None,
+        }
+    );
+}
+
 #[test]
 fn parse_interval_and_or_xor() {
     let sql = "SELECT col FROM test \