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inform test result of zero hist_size for json histogram

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Signed-off-by: Michael Okoko <okokomichaels@outlook.com>
This commit is contained in:
Michael Okoko 2021-07-31 20:21:38 +01:00 committed by Sergei Petrunia
parent bf4d0dcfe2
commit fe2e516a50
3 changed files with 7 additions and 8 deletions
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8
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 1.0000 10 JSON [
test t1 a 1 25 0.0000 4.0000 0.0000 10 JSON [
"3",
"5",
"7",
@ -31,7 +31,7 @@ test t1 a 1 25 0.0000 4.0000 1.0000 10 JSON [
"21",
"23"
]
test t1 b 1 9 0.0000 1.6400 1.0000 10 JSON [
test t1 b 1 9 0.0000 1.6400 0.0000 10 JSON [
"11",
"13",
"15",
@ -43,7 +43,7 @@ test t1 b 1 9 0.0000 1.6400 1.0000 10 JSON [
"5",
"7"
]
test t1 c 1 9 0.0000 2.0000 1.0000 10 JSON [
test t1 c 1 9 0.0000 2.0000 0.0000 10 JSON [
"11",
"13",
"15",
@ -55,7 +55,7 @@ test t1 c 1 9 0.0000 2.0000 1.0000 10 JSON [
"5",
"7"
]
test t1 d 1 25 0.0000 8.0000 1.0000 10 JSON [
test t1 d 1 25 0.0000 8.0000 0.0000 10 JSON [
"3",
"5",
"7",

3
sql/sql_statistics.cc
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@ -1283,7 +1283,6 @@ void Histogram_json::init_for_collection(MEM_ROOT *mem_root, Histogram_type htyp
bool Histogram_json::parse(MEM_ROOT *mem_root, Histogram_type type_arg, const uchar *ptr, uint size_arg)
{
size = (uint8) size_arg;
type = type_arg;
// I think we could use memcpy here, but not sure about how to get the right size
// since we can't depend on size_arg (it's zero for json histograms)
@ -1303,7 +1302,7 @@ bool Histogram_json::parse(MEM_ROOT *mem_root, Histogram_type type_arg, const uc
void Histogram_json::serialize(Field *field)
{
field->store((char*)get_values(), strlen((char*)get_values()),
field->store((char*)values, strlen((char*)values),
&my_charset_bin);
}

4
sql/sql_statistics.h
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@ -372,9 +372,9 @@ public:
is_available();
}
void set_values (uchar *vals) override { values= (uchar *) vals; }
void set_values (uchar *vals) override { values= vals; }
uchar *get_values() override { return (uchar *) values; }
uchar *get_values() override { return values; }
double range_selectivity(double min_pos, double max_pos) override {return 0.1;}