fix

Author: jialuoo

bigframes/core/compile/sqlglot/expressions/string_ops.py

@@ -279,7 +279,7 @@ def _(expr: TypedExpr) -> sge.Expression:
 
 @register_binary_op(ops.strconcat_op)
 def _(left: TypedExpr, right: TypedExpr) -> sge.Expression:
-    return sge.Concat(this=left.expr, expression=right.expr)
+    return sge.Concat(expressions=[left.expr, right.expr])
 
 
 @register_unary_op(ops.ZfillOp, pass_op=True)

tests/unit/core/compile/sqlglot/expressions/snapshots/test_string_ops/test_strconcat/out.sql

@@ -5,7 +5,7 @@ WITH `bfcte_0` AS (
 ), `bfcte_1` AS (
   SELECT
     *,
-    CONCAT() AS `bfcol_1`
+    CONCAT(`bfcol_0`, 'a') AS `bfcol_1`
   FROM `bfcte_0`
 )
 SELECT