Task LAV-2094: CREATE OR REPLACE VIEW (cols) COPY GRANTS parses; SHOW DYNAMIC TABLES text is rendered in real Snowflake's canonical form (#2555)

* Task LAV-2094: VIEW COPY GRANTS after column list; canonical SHOW DYNAMIC TABLES text

- Parse COPY GRANTS both before and after the view column list.
- Render SHOW DYNAMIC TABLES .text in real Snowflake's canonical form via a
  shared renderer also used by GET_DDL.
- Add compat test (real-SF snapshot) for a column-list view with COPY GRANTS
  after the columns: the SELECT grant survives CREATE OR REPLACE.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* Task LAV-2094: SHOW DYNAMIC TABLES canonical re-serialized text; frozen_where/configured_refresh_mode columns; real-name TARGET_LAG error

* Task LAV-2094: reconcile SHOW DYNAMIC TABLES text with main's CREATE OR ALTER tests

Rebasing onto newer main pulled in LAV-385's CREATE OR ALTER DYNAMIC TABLE
tests, whose snapshots were recorded while the shared
_add_show_dynamic_table_transformers helper still masked the `text` column.
Un-masking `text` in the shared helper (this task's AC 3) inadvertently
un-masked those tests too, which are about in-place ALTER semantics, not text
rendering, and are outside AC 3's un-mask scope. Restore their original masked
behaviour with an inline text mask on the five that SHOW a text row
(creates, in_place, comment_reset, property_changes, transient).

Also append the frozen_where / configured_refresh_mode columns to the dynamic
iceberg table's SHOW snapshot row so it matches the emulator's SHOW shape
(both deterministic: null and the INCREMENTAL refresh_mode reference).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* Task LAV-2094: don't fire the missing-database gate on CTE aliases in DDL bodies

TestAcc_GrantPrivilegesToShare_OnDynamicTable failed at step 1/2: the
terraform provider creates the dynamic table with a `WITH temp AS (…)
SELECT … FROM temp` body and no current database, and the identifier-check
gate treated the 1-part CTE alias `temp` as a schema object (DdlStrict fires
090105/090106 on bare 1-part relations), rejecting the CREATE.

CTE aliases are query-local names, never schema objects — real Snowflake never
fires the missing-context gate on them. Collect the statement's CTE aliases and
skip any bare 1-part relation that resolves to one. Under-qualified *real*
relations in a table body still fire (a table's body resolves against the
session, unlike a view's), so this exempts only the CTE alias itself.

Verified end-to-end: both DoD terraform tests
(TestAcc_View_CheckGrantsAfterRecreation, TestAcc_GrantPrivilegesToShare_OnDynamicTable)
now pass locally against the emulator.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Wojciech Padło <wojciech.padlo@localstack.cloud>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: 3 people

src/parser/mod.rs

@@ -7335,10 +7335,14 @@ impl<'a> Parser<'a> {
         let name_before_not_exists = !if_not_exists_first
             && self.parse_keywords(&[Keyword::IF, Keyword::NOT, Keyword::EXISTS]);
         let if_not_exists = if_not_exists_first || name_before_not_exists;
-        let copy_grants = self.parse_keywords(&[Keyword::COPY, Keyword::GRANTS]);
+        let copy_grants_before_columns = self.parse_keywords(&[Keyword::COPY, Keyword::GRANTS]);
         // Many dialects support `OR ALTER` right after `CREATE`, but we don't (yet).
         // ANSI SQL and Postgres support RECURSIVE here, but we don't support it either.
         let columns = self.parse_view_columns()?;
+        // Snowflake accepts `COPY GRANTS` either before the column list or
+        // after it (just before the options / `AS`).
+        let copy_grants =
+            copy_grants_before_columns || self.parse_keywords(&[Keyword::COPY, Keyword::GRANTS]);
         let mut options = CreateTableOptions::None;
         let with_options = self.parse_options(Keyword::WITH)?;
         if !with_options.is_empty() {