Details
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Bug
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Status: Open (View Workflow)
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Major
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Resolution: Unresolved
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10.4
Description
Here is a test case:
CREATE TABLE t1(i INT PRIMARY KEY, b CHAR(10), INDEX i_b(b));
INSERT INTO t1 VALUES (1, 'ab\n');
INSERT INTO t1 VALUES (2, 'ab\n');
set optimizer_trace=1;
EXPLAIN SELECT * FROM t1 WHERE b IN ('ab\n');
select * from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
"analyzing_range_alternatives": {
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"range_scan_alternatives": [
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{
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"index": "i_b",
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"ranges": ["ab
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<= b <= ab
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"],
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"rowid_ordered": true,
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"using_mrr": false,
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"index_only": false,
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"rows": 2,
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"cost": 3.632,
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"chosen": true
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}
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],
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It would be good to see the range as 'ab\n' <= b <= 'ab\n'
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
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JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
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NULL
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Warnings:
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Warning 4036 Character disallowed in JSON in argument 1 to function 'json_extract' at position 2582
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