switch _INF _FLOAT64_EXP_BOUND

Author: chelsea-lin

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

@@ -200,8 +200,8 @@ def _(op: ops.base_ops.UnaryOp, expr: TypedExpr) -> sge.Expression:
     return sge.Case(
         ifs=[
             sge.If(
-                this=expr.expr > sge.convert(709.78),
-                true=sge.func("IEEE_DIVIDE", sge.convert(1), sge.convert(0)),
+                this=expr.expr > _FLOAT64_EXP_BOUND,
+                true=_INF,
             )
         ],
         default=sge.func("EXP", expr.expr),
@@ -213,8 +213,8 @@ def _(op: ops.base_ops.UnaryOp, expr: TypedExpr) -> sge.Expression:
     return sge.Case(
         ifs=[
             sge.If(
-                this=expr.expr > sge.convert(709.78),
-                true=sge.func("IEEE_DIVIDE", sge.convert(1), sge.convert(0)),
+                this=expr.expr > _FLOAT64_EXP_BOUND,
+                true=_INF,
             )
         ],
         default=sge.func("EXP", expr.expr),

tests/unit/core/compile/sqlglot/expressions/snapshots/test_unary_compiler/test_exp/out.sql

@@ -5,7 +5,11 @@ WITH `bfcte_0` AS (
 ), `bfcte_1` AS (
   SELECT
     *,
-    CASE WHEN `bfcol_0` > 709.78 THEN IEEE_DIVIDE(1, 0) ELSE EXP(`bfcol_0`) END AS `bfcol_1`
+    CASE
+      WHEN `bfcol_0` > 709.78
+      THEN CAST('Infinity' AS FLOAT64)
+      ELSE EXP(`bfcol_0`)
+    END AS `bfcol_1`
   FROM `bfcte_0`
 )
 SELECT

tests/unit/core/compile/sqlglot/expressions/snapshots/test_unary_compiler/test_expm1/out.sql

@@ -5,7 +5,11 @@ WITH `bfcte_0` AS (
 ), `bfcte_1` AS (
   SELECT
     *,
-    CASE WHEN `bfcol_0` > 709.78 THEN IEEE_DIVIDE(1, 0) ELSE EXP(`bfcol_0`) END - 1 AS `bfcol_1`
+    CASE
+      WHEN `bfcol_0` > 709.78
+      THEN CAST('Infinity' AS FLOAT64)
+      ELSE EXP(`bfcol_0`)
+    END - 1 AS `bfcol_1`
   FROM `bfcte_0`
 )
 SELECT