fix: round columns percentage stats to 9th decimal (#3432)

Author: esciara

sqlmesh/core/table_diff.py

@@ -455,7 +455,7 @@ def name(e: exp.Expression) -> str:
                                     )
                                     / exp.func("COUNT", name(c))
                                 ),
-                                1,
+                                9,
                             ).as_(c.alias)
                             for c in comparisons
                         )

tests/core/test_table_diff.py

@@ -268,7 +268,7 @@ def test_generated_sql(sushi_context_fixed_date: Context, mocker: MockerFixture)
 
     query_sql = 'CREATE TABLE IF NOT EXISTS "memory"."sqlmesh_temp_test"."__temp_diff_abcdefgh" AS WITH "__source" AS (SELECT "key", "value", "key" AS "__sqlmesh_join_key" FROM "table_diff_source"), "__target" AS (SELECT "key", "value", "key" AS "__sqlmesh_join_key" FROM "table_diff_target"), "__stats" AS (SELECT "s"."key" AS "s__key", "s"."value" AS "s__value", "s"."__sqlmesh_join_key" AS "s____sqlmesh_join_key", "t"."key" AS "t__key", "t"."value" AS "t__value", "t"."__sqlmesh_join_key" AS "t____sqlmesh_join_key", CASE WHEN NOT "s"."key" IS NULL THEN 1 ELSE 0 END AS "s_exists", CASE WHEN NOT "t"."key" IS NULL THEN 1 ELSE 0 END AS "t_exists", CASE WHEN "s"."__sqlmesh_join_key" = "t"."__sqlmesh_join_key" AND (NOT "s"."key" IS NULL AND NOT "t"."key" IS NULL) THEN 1 ELSE 0 END AS "row_joined", CASE WHEN "s"."key" IS NULL AND "t"."key" IS NULL THEN 1 ELSE 0 END AS "null_grain", CASE WHEN "s"."key" = "t"."key" THEN 1 WHEN ("s"."key" IS NULL) AND ("t"."key" IS NULL) THEN 1 WHEN ("s"."key" IS NULL) OR ("t"."key" IS NULL) THEN 0 ELSE 0 END AS "key_matches", CASE WHEN ROUND("s"."value", 3) = ROUND("t"."value", 3) THEN 1 WHEN ("s"."value" IS NULL) AND ("t"."value" IS NULL) THEN 1 WHEN ("s"."value" IS NULL) OR ("t"."value" IS NULL) THEN 0 ELSE 0 END AS "value_matches" FROM "__source" AS "s" FULL JOIN "__target" AS "t" ON "s"."__sqlmesh_join_key" = "t"."__sqlmesh_join_key") SELECT *, CASE WHEN "key_matches" = 1 AND "value_matches" = 1 THEN 1 ELSE 0 END AS "row_full_match" FROM "__stats"'
     summary_query_sql = 'SELECT SUM("s_exists") AS "s_count", SUM("t_exists") AS "t_count", SUM("row_joined") AS "join_count", SUM("null_grain") AS "null_grain_count", SUM("row_full_match") AS "full_match_count", SUM("key_matches") AS "key_matches", SUM("value_matches") AS "value_matches", COUNT(DISTINCT ("s____sqlmesh_join_key")) AS "distinct_count_s", COUNT(DISTINCT ("t____sqlmesh_join_key")) AS "distinct_count_t" FROM "memory"."sqlmesh_temp_test"."__temp_diff_abcdefgh"'
-    compare_sql = 'SELECT ROUND(100 * (CAST(SUM("key_matches") AS DECIMAL) / COUNT("key_matches")), 1) AS "key_matches", ROUND(100 * (CAST(SUM("value_matches") AS DECIMAL) / COUNT("value_matches")), 1) AS "value_matches" FROM "memory"."sqlmesh_temp_test"."__temp_diff_abcdefgh" WHERE "row_joined" = 1'
+    compare_sql = 'SELECT ROUND(100 * (CAST(SUM("key_matches") AS DECIMAL) / COUNT("key_matches")), 9) AS "key_matches", ROUND(100 * (CAST(SUM("value_matches") AS DECIMAL) / COUNT("value_matches")), 9) AS "value_matches" FROM "memory"."sqlmesh_temp_test"."__temp_diff_abcdefgh" WHERE "row_joined" = 1'
     sample_query_sql = 'SELECT "s_exists", "t_exists", "row_joined", "row_full_match", "s__key", "s__value", "s____sqlmesh_join_key", "t__key", "t__value", "t____sqlmesh_join_key" FROM "memory"."sqlmesh_temp_test"."__temp_diff_abcdefgh" WHERE "key_matches" = 0 OR "value_matches" = 0 ORDER BY "s__key" NULLS FIRST, "t__key" NULLS FIRST LIMIT 20'
     drop_sql = 'DROP TABLE IF EXISTS "memory"."sqlmesh_temp_test"."__temp_diff_abcdefgh"'