Improve numeric_power() tests for large integer powers.

deanrasheed · deanrasheed · commit 434ddfb79afe · 2021-08-05T22:24:28.000+01:00
Two of the tests added by 4dd5ce2 fail on buildfarm member castoroides, though it's not clear why. Improve the tests to report the actual values produced, if they're not what was expected. Apply to v11 only for now, until it's clearer what's going on.
diff --git a/src/test/regress/expected/numeric.out b/src/test/regress/expected/numeric.out
@@ -1668,10 +1668,10 @@ select 1.000000000123 ^ (-2147483648);
  0.7678656556403084
 (1 row)
 
-select 0.9999999999 ^ 23300000000000 = 0 as rounds_to_zero;
+select coalesce(nullif(0.9999999999 ^ 23300000000000, 0), 0) as rounds_to_zero;
  rounds_to_zero 
 ----------------
- t
+              0
 (1 row)
 
 -- cases that used to error out
@@ -1687,10 +1687,10 @@ select 0.5678 ^ (-85);
  782333637740774446257.7719390061997396
 (1 row)
 
-select 0.9999999999 ^ 70000000000000 = 0 as underflows;
+select coalesce(nullif(0.9999999999 ^ 70000000000000, 0), 0) as underflows;
  underflows 
 ------------
- t
+          0
 (1 row)
 
 -- negative base to integer powers
diff --git a/src/test/regress/sql/numeric.sql b/src/test/regress/sql/numeric.sql
@@ -907,12 +907,12 @@ select 3.789 ^ 35;
 select 1.2 ^ 345;
 select 0.12 ^ (-20);
 select 1.000000000123 ^ (-2147483648);
-select 0.9999999999 ^ 23300000000000 = 0 as rounds_to_zero;
+select coalesce(nullif(0.9999999999 ^ 23300000000000, 0), 0) as rounds_to_zero;
 
 -- cases that used to error out
 select 0.12 ^ (-25);
 select 0.5678 ^ (-85);
-select 0.9999999999 ^ 70000000000000 = 0 as underflows;
+select coalesce(nullif(0.9999999999 ^ 70000000000000, 0), 0) as underflows;
 
 -- negative base to integer powers
 select (-1.0) ^ 2147483646;
