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Use generic Histogram_base class for Histogram_builders

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This fixes the wrong calculation for avg_frequency in json histograms
by replacing the specific histogram objects with the generic Histogram_base class.

It also restores get/set size functions as they were useful in calculating fields
for binary histogram.

Signed-off-by: Michael Okoko <okokomichaels@outlook.com>
This commit is contained in:
Michael Okoko
2021-08-11 06:58:18 +01:00
committed by Sergei Petrunia
parent 21e0f5487f
commit 69f24c238e
3 changed files with 32 additions and 44 deletions
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10
mysql-test/main/statistics_json.result
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@@ -19,7 +19,7 @@ test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
SELECT * FROM mysql.column_stats WHERE table_name='t1';
db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
test t1 a 1 25 0.0000 4.0000 0.0000 10 JSON [
test t1 a 1 25 0.0000 4.0000 1.0000 10 JSON [
"3",
"5",
"7",
@@ -31,7 +31,7 @@ test t1 a 1 25 0.0000 4.0000 0.0000 10 JSON [
"21",
"23"
]
test t1 b 1 9 0.0000 1.6400 0.0000 10 JSON [
test t1 b 1 9 0.0000 1.6400 1.0000 10 JSON [
"11",
"13",
"15",
@@ -43,7 +43,7 @@ test t1 b 1 9 0.0000 1.6400 0.0000 10 JSON [
"5",
"7"
]
test t1 c 1 9 0.0000 2.0000 0.0000 10 JSON [
test t1 c 1 9 0.0000 2.0000 1.0000 10 JSON [
"11",
"13",
"15",
@@ -55,7 +55,7 @@ test t1 c 1 9 0.0000 2.0000 0.0000 10 JSON [
"5",
"7"
]
test t1 d 1 25 0.0000 8.0000 0.0000 10 JSON [
test t1 d 1 25 0.0000 8.0000 1.0000 10 JSON [
"3",
"5",
"7",
@@ -101,7 +101,7 @@ ERROR HY000: Failed to parse histogram, encountered JSON_TYPE '1'.
UPDATE mysql.column_stats SET histogram='{}' WHERE table_name='t1';
FLUSH TABLES;
SELECT * FROM t1;
ERROR HY000: Failed to parse histogram, encountered JSON_TYPE '32608'.
ERROR HY000: Failed to parse histogram, encountered JSON_TYPE '32641'.
DELETE FROM mysql.column_stats;
DROP TABLE t1;
create schema world;