Merging upstream version 19.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/sqlglot/dialects/duckdb.py b/sqlglot/dialects/duckdb.py
index 287e03a..d8d9f90 100644
--- a/sqlglot/dialects/duckdb.py
+++ b/sqlglot/dialects/duckdb.py
@@ -36,14 +36,14 @@ from sqlglot.tokens import TokenType
 def _ts_or_ds_add_sql(self: DuckDB.Generator, expression: exp.TsOrDsAdd) -> str:
     this = self.sql(expression, "this")
     unit = self.sql(expression, "unit").strip("'") or "DAY"
-    return f"CAST({this} AS DATE) + {self.sql(exp.Interval(this=expression.expression.copy(), unit=unit))}"
+    return f"CAST({this} AS DATE) + {self.sql(exp.Interval(this=expression.expression, unit=unit))}"
 
 
 def _date_delta_sql(self: DuckDB.Generator, expression: exp.DateAdd | exp.DateSub) -> str:
     this = self.sql(expression, "this")
     unit = self.sql(expression, "unit").strip("'") or "DAY"
     op = "+" if isinstance(expression, exp.DateAdd) else "-"
-    return f"{this} {op} {self.sql(exp.Interval(this=expression.expression.copy(), unit=unit))}"
+    return f"{this} {op} {self.sql(exp.Interval(this=expression.expression, unit=unit))}"
 
 
 # BigQuery -> DuckDB conversion for the DATE function
@@ -365,7 +365,7 @@ class DuckDB(Dialect):
                 multiplier = 90
 
             if multiplier:
-                return f"({multiplier} * {super().interval_sql(exp.Interval(this=expression.this.copy(), unit=exp.var('day')))})"
+                return f"({multiplier} * {super().interval_sql(exp.Interval(this=expression.this, unit=exp.var('day')))})"
 
             return super().interval_sql(expression)