refactor table versioning support flag

because now we can version by more than just timestamps

Author: JamesVorder

src/dialect/bigquery.rs

@@ -136,7 +136,7 @@ impl Dialect for BigQueryDialect {
     }
 
     // See <https://cloud.google.com/bigquery/docs/access-historical-data>
-    fn supports_timestamp_versioning(&self) -> bool {
+    fn supports_table_versioning(&self) -> bool {
         true
     }
 

src/dialect/databricks.rs

@@ -48,7 +48,7 @@ impl Dialect for DatabricksDialect {
     }
 
     /// <https://docs.databricks.com/gcp/en/delta/history#delta-time-travel-syntax>
-    fn supports_timestamp_versioning(&self) -> bool {
+    fn supports_table_versioning(&self) -> bool {
         true
     }
 

src/dialect/mod.rs

@@ -1060,7 +1060,7 @@ pub trait Dialect: Debug + Any {
 
     /// Returns true if this dialect supports querying historical table data
     /// by specifying which version of the data to query.
-    fn supports_timestamp_versioning(&self) -> bool {
+    fn supports_table_versioning(&self) -> bool {
         false
     }
 

src/dialect/mssql.rs

@@ -107,7 +107,7 @@ impl Dialect for MsSqlDialect {
     }
 
     /// See: <https://learn.microsoft.com/en-us/sql/relational-databases/tables/querying-data-in-a-system-versioned-temporal-table>
-    fn supports_timestamp_versioning(&self) -> bool {
+    fn supports_table_versioning(&self) -> bool {
         true
     }
 

src/dialect/snowflake.rs

@@ -536,7 +536,7 @@ impl Dialect for SnowflakeDialect {
     }
 
     /// See: <https://docs.snowflake.com/en/sql-reference/constructs/at-before>
-    fn supports_timestamp_versioning(&self) -> bool {
+    fn supports_table_versioning(&self) -> bool {
         true
     }
 

src/parser/mod.rs

@@ -15484,7 +15484,7 @@ impl<'a> Parser<'a> {
 
     /// Parses a the timestamp version specifier (i.e. query historical data)
     pub fn maybe_parse_table_version(&mut self) -> Result<Option<TableVersion>, ParserError> {
-        if self.dialect.supports_timestamp_versioning() {
+        if self.dialect.supports_table_versioning() {
             if self.parse_keywords(&[Keyword::FOR, Keyword::SYSTEM_TIME, Keyword::AS, Keyword::OF])
             {
                 let expr = self.parse_expr()?;