質問編集履歴
3
ご指摘頂いた点について加筆致しました。(explain結果について)
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@@ -116,7 +116,7 @@
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explain結果
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-
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+
```MySQL5.7
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| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
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@@ -125,3 +125,5 @@
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| 1 | SIMPLE | B | \N | ALL | PRIMARY,テーブルB | \N | \N | \N | 1658424 | 100.00 | \N |
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| 1 | UPDATE | A | \N | ref | PRIMARY,テーブルA | PRIMARY | 202 | B.id | 916054 | 1.11 | Using where |
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+
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```
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2
<コード>を利用した記述に修正しました。
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@@ -22,7 +22,7 @@
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|2019-09-02|9999-12-31|2|2B|
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-
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+
```MySQL5.7
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CREATE TABLE `テーブルA` (
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@@ -44,6 +44,8 @@
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;
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```
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更新情報を持ったある時点のテーブルB(170万件程度)
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@@ -57,6 +59,8 @@
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|2019-10-10|2|2C|
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```MySQL5.7
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CREATE TABLE `テーブルB` (
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@@ -75,6 +79,8 @@
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ENGINE=InnoDB
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;
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```
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@@ -98,13 +104,15 @@
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現行の更新クエリ：
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```MySQL5.7
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+
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update [テーブルA] A
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inner join [テーブルB] B on A.id=B.id and B.base_date between A.from_date and A.to_date
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set A.value=B.value;
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-
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```
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explain結果
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1
ご指摘頂いた点について加筆致しました。(各テーブルのCreate及び現行クエリのexplain結果について)
test
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test
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@@ -24,6 +24,28 @@
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24
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CREATE TABLE `テーブルA` (
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`from_date` DATE NOT NULL,
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`to_date` DATE NOT NULL,
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`id` INT(11) NOT NULL,
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`value` VARCHAR(50) NOT NULL,
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PRIMARY KEY (`to_date`, `id`)
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)
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COLLATE='utf8mb4_general_ci'
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ENGINE=InnoDB
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;
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+
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+
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+
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27
49
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更新情報を持ったある時点のテーブルB(170万件程度)
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28
50
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29
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|base_date(primary key)|id(primary key)|value|
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@@ -33,6 +55,26 @@
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|2019-10-10|1|1D|
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|2019-10-10|2|2C|
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+
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CREATE TABLE `テーブルB` (
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`base_date` DATE NOT NULL,
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+
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`id` INT(11) NOT NULL,
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+
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`value` VARCHAR(50) NOT NULL,
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PRIMARY KEY (`base_date`, `id`)
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+
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+
)
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+
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COLLATE='utf8mb4_general_ci'
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ENGINE=InnoDB
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;
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@@ -61,3 +103,17 @@
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inner join [テーブルB] B on A.id=B.id and B.base_date between A.from_date and A.to_date
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63
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set A.value=B.value;
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+
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+
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108
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+
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109
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+
explain結果
|
|
110
|
+
|
|
111
|
+
|
|
112
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+
|
|
113
|
+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|
|
114
|
+
|
|
115
|
+
| ---: | --- | --- | --- | --- | --- | --- | --- | --- | ---: | ---: | --- |
|
|
116
|
+
|
|
117
|
+
| 1 | SIMPLE | B | \N | ALL | PRIMARY,テーブルB | \N | \N | \N | 1658424 | 100.00 | \N |
|
|
118
|
+
|
|
119
|
+
| 1 | UPDATE | A | \N | ref | PRIMARY,テーブルA | PRIMARY | 202 | B.id | 916054 | 1.11 | Using where |
|