From 1e84302bb3ee8ee8e5e2792157b68720d88c5432 Mon Sep 17 00:00:00 2001
From: Kevin Longe <273747162+kvlonge@users.noreply.github.com>
Date: Fri, 6 Nov 2026 05:14:21 +0000
Subject: [PATCH 1/2] Parse TRUNC and TRUNCATE's bare second argument as a
 column

A bare identifier as TRUNC's second argument is a date part in
Snowflake only when no column of that name is in scope: TRUNC(1, DAY)
compiled with no table (receipt sf.functions.trunc2.ka4427f986c78),
while TRUNC(x, s) with a column s truncated numerically (C's slice 1
cases trunc.trunc/trunc.truncate t001, t005, t006, t007). The parser
cannot see scope, so it keeps the identifier as a column, as polyglot
does, instead of rewriting date-part spellings to a date part.
---
 .../src/parser/_helpers/expressions/grouping.rs    |  8 --------
 crates/sqlquack-syntax/tests/parser/test_fixes.rs  | 14 ++++++++------
 2 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/crates/sqlquack-syntax/src/parser/_helpers/expressions/grouping.rs b/crates/sqlquack-syntax/src/parser/_helpers/expressions/grouping.rs
index 76981407d..6cec95e18 100644
--- a/crates/sqlquack-syntax/src/parser/_helpers/expressions/grouping.rs
+++ b/crates/sqlquack-syntax/src/parser/_helpers/expressions/grouping.rs
@@ -1860,14 +1860,6 @@ impl Parser {
                 "DATE_TRUNC" | "DATETRUNC" if !args.is_empty() => Some(0),
                 "DATEDIFF" | "TIMEDIFF" | "TIMESTAMPDIFF" if args.len() == TERNARY_ARITY => Some(0),
                 "EXTRACT" if args.len() == BINARY_ARITY => Some(0),
-                "TRUNC" | "TRUNCATE"
-                    if args.len() == BINARY_ARITY
-                        && matches!(&args[1], Expression::Column(c)
-                            if c.table.is_none() && !c.name.quoted)
-                        && self.try_parse_date_part_unit_expr(&args[1]).is_some() =>
-                {
-                    Some(1)
-                }
                 _ => None,
             },
             _ => None,
diff --git a/crates/sqlquack-syntax/tests/parser/test_fixes.rs b/crates/sqlquack-syntax/tests/parser/test_fixes.rs
index 7e951b62f..498db414d 100644
--- a/crates/sqlquack-syntax/tests/parser/test_fixes.rs
+++ b/crates/sqlquack-syntax/tests/parser/test_fixes.rs
@@ -451,16 +451,18 @@ fn given_auditor_tree_findings_when_parsing_faithfully_then_the_tree_records_wha
             expected_value: json!("DAY"),
         },
         ProjectionTestCase {
-            description: "TRUNC's date part is a date part",
-            sql: "SELECT TRUNC(1, DAY)",
-            pointer: "/function/args/1/var/this",
+            description:
+                "TRUNC's bare second argument stays a column, a date part only by the first's type",
+            sql: "SELECT TRUNC(x, DAY)",
+            pointer: "/function/args/1/column/name/name",
             expected_value: json!("DAY"),
         },
         ProjectionTestCase {
-            description: "TRUNC's numeric scale column stays a column",
-            sql: "SELECT TRUNC(1, c1)",
+            description:
+                "TRUNCATE's scale column named like a date part abbreviation stays a column",
+            sql: "SELECT TRUNCATE(x, s)",
             pointer: "/function/args/1/column/name/name",
-            expected_value: json!("c1"),
+            expected_value: json!("s"),
         },
         ProjectionTestCase {
             description: "unary plus keeps its operator",

From 75a8d5bd88002da478672f1f871f5995380bddec Mon Sep 17 00:00:00 2001
From: Kevin Longe <273747162+kvlonge@users.noreply.github.com>
Date: Fri, 6 Nov 2026 05:17:15 +0000
Subject: [PATCH 2/2] coverage: re-record the syntax baseline on the TRUNC
 column parse

Only change: sf.functions.trunc2 verified -> unverified, because its
auditor review fingerprints the old tree of SELECT TRUNC ( 1 , DAY ).
Satisfied obligations 68,585, parsed/refused cases and the 5,128
known parser/receipt disagreements are unchanged; no receipt verdict
moves. The auditor renews the review under D118.
---
 coverage/syntax/baseline.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/coverage/syntax/baseline.json b/coverage/syntax/baseline.json
index 98c6abccb..0786c3971 100644
--- a/coverage/syntax/baseline.json
+++ b/coverage/syntax/baseline.json
@@ -15,7 +15,7 @@
     "catalogue/utility.toml": "55b30dcf06bf8182232a0da6b1da75462ae171e015cc8c9b8b95b36a722b44c5",
     "sources.toml": "a180c722616dfefc1568edf41938a0abf491f5a89f9609a1f666a50aa5aead94"
   },
-  "parser_tree": "2de58a44aca56391ee1dbe36a091556e469b7a9d",
+  "parser_tree": "cc21b65e16782fc53d833e5ec10a9bc3ba9fdc04",
   "forms": {
     "sf.classes.anomaly-detection.commands.create-anomaly-detection": "unverified",
     "sf.classes.anomaly-detection.commands.drop-anomaly-detection": "unverified",
@@ -2637,7 +2637,7 @@
     "sf.functions.trim": "verified",
     "sf.functions.trunc.trunc": "verified",
     "sf.functions.trunc.truncate": "verified",
-    "sf.functions.trunc2": "verified",
+    "sf.functions.trunc2": "unverified",
     "sf.functions.try-base64-decode-binary": "verified",
     "sf.functions.try-base64-decode-string": "verified",
     "sf.functions.try-cast": "verified",