for test coverage

d9f6ef72 · martianzhang · 407db8a0 · d9f6ef72 · d9f6ef72 · d9f6ef72
10 changed file
--- a/advisor/explainer_test.go
+++ b/advisor/explainer_test.go
@@ -31,7 +31,13 @@ func TestDigestExplainText(t *testing.T) {
 |  1 | SIMPLE      | city    | ref   | idx_fk_country_id,idx_country_id_city,idx_all,idx_other | idx_fk_country_id | 2       | sakila.country.country_id |    2 | Using index |
 +----+-------------+---------+-------+---------------------------------------------------------+-------------------+---------+---------------------------+------+-------------+`
 	common.Config.ReportType = "explain-digest"
-	err := common.GoldenDiff(func() { DigestExplainText(text) }, t.Name(), update)
+	err := common.GoldenDiff(func() {
+		DigestExplainText(text)
+		orgReportType := common.Config.ReportType
+		common.Config.ReportType = "html"
+		DigestExplainText(text)
+		common.Config.ReportType = orgReportType
+	}, t.Name(), update)
 	if nil != err {
 		t.Fatal(err)
 	}

--- a/advisor/testdata/TestDigestExplainText.golden
+++ b/advisor/testdata/TestDigestExplainText.golden
@@ -24,3 +24,112 @@
 * **Using index**: 只需通过索引就可以从表中获取列的信息, 无需额外去读取真实的行数据. 如果查询使用的列值仅仅是一个简单索引的部分值, 则会使用这种策略来优化查询.


+<head>
+<meta http-equiv=Content-Type content="text/html;charset=utf-8">
+<title>SQL优化分析报告</title>
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+
+		function escape2Html(str) {
+    	    var arrEntities = {'lt': '<', 'gt': '>', 'nbsp': '', 'amp': '&', 'quot': '"'};
+    	    return str.replace(/&(lt|gt|nbsp|amp|quot);/ig, function (all, t) {
+    	        return arrEntities[t];
+    	    });
+    	}
+	
+    	function load() {
+    	    let codeList = document.getElementsByClassName('language-sql');
+	
+    	    for (let i = 0 ;i<codeList.length;i++) {
+    	        codeList[i].innerHTML = window.sqlFormatter.format(escape2Html(codeList[i].innerHTML))
+    	    }
+    	};
+</script>
+<style id="soar_md">
+
+a:link,a:visited{text-decoration:none}h3,h4{margin-top:2em}h5,h6{margin-top:20px}h3,h4,h5,h6{margin-bottom:.5em;color:#000}body,h1,h2,h3,h4,h5,h6{color:#000}ol,ul{margin:0 0 0 30px;padding:0 0 12px 6px}ol,ol ol{list-style-position:outside}table td p,table th p{margin-bottom:0}input,select{vertical-align:middle;padding:0}h5,h6,input,select{padding:0}hr,table,textarea{width:100%}body{margin:20px auto;width:800px;background-color:#fff;font:13px "Myriad Pro","Lucida Grande",Lucida,Verdana,sans-serif}h1,table th p{font-weight:700}a:link{color:#00f}a:visited{color:#00a}a:active,a:hover{color:#f60;text-decoration:underline}* html code,* html pre{font-size:101%}code,pre{font-size:11px;font-family:monaco,courier,consolas,monospace}pre{border:1px solid #c7cfd5;background:#f1f5f9;margin:20px 0;padding:8px;text-align:left}hr{color:#919699;size:1;noshade:"noshade"}h1,h2,h3,h4,h5,h6{font-family:"Myriad Pro","Lucida Grande",Lucida,Verdana,sans-serif;font-weight:700}h1{margin-top:1em;margin-bottom:25px;font-size:30px}h2{margin-top:2.5em;font-size:24px;padding-bottom:2px;border-bottom:1px solid #919699}h3{font-size:17px}h4{font-size:15px}h5{font-size:13px}h6{font-size:11px}table td,table th{font-size:12px;border-bottom:1px solid #919699;border-right:1px solid #919699}p{margin-top:0;margin-bottom:10px}ul{list-style:square}li{margin-top:7px}ol{list-style-type:decimal}ol ol{list-style-type:lower-alpha;margin:7px 0 0 30px;padding:0 0 0 10px}ul ul{margin-left:40px;padding:0 0 0 6px}li>p{display:inline}li>a+p,li>p+p{display:block}table{border-top:1px solid #919699;border-left:1px solid #919699;border-spacing:0}table th{padding:4px 8px;background:#E2E2E2}table td{padding:8px;vertical-align:top}table td p+p,table td p+p+p{margin-top:5px}form{margin:0}button{margin:3px 0 10px}input{margin:0 0 5px}select{margin:0 0 3px}textarea{margin:0 0 10px}
+
+</style>
+</head>
+<body onload=load()>
+
+<h2>Explain信息</h2>
+
+<p>★ ★ ★ ★ ★ 100分</p>
+
+<table>
+<thead>
+<tr>
+<th>id</th>
+<th>select_type</th>
+<th>table</th>
+<th>partitions</th>
+<th>type</th>
+<th>possible_keys</th>
+<th>key</th>
+<th>key_len</th>
+<th>ref</th>
+<th>rows</th>
+<th>filtered</th>
+<th>scalability</th>
+<th>Extra</th>
+</tr>
+</thead>
+
+<tbody>
+<tr>
+<td>1</td>
+<td>SIMPLE</td>
+<td><em>country</em></td>
+<td>NULL</td>
+<td>index</td>
+<td>PRIMARY,<br>country_id</td>
+<td>country</td>
+<td>152</td>
+<td>NULL</td>
+<td>0</td>
+<td>0.00%</td>
+<td>☠️ <strong>O(n)</strong></td>
+<td>Using index</td>
+</tr>
+
+<tr>
+<td>1</td>
+<td>SIMPLE</td>
+<td><em>city</em></td>
+<td>NULL</td>
+<td>ref</td>
+<td>idx_fk_country_id,<br>idx_country_id_city,<br>idx_all,<br>idx_other</td>
+<td>idx_fk_country_id</td>
+<td>2</td>
+<td>sakila.country.country_id</td>
+<td>0</td>
+<td>0.00%</td>
+<td>☠️ <strong>O(n)</strong></td>
+<td>Using index</td>
+</tr>
+</tbody>
+</table>
+
+<h3>Explain信息解读</h3>
+
+<h4>SelectType信息解读</h4>
+
+<ul>
+<li><strong>SIMPLE</strong>: 简单SELECT(不使用UNION或子查询等).</li>
+</ul>
+
+<h4>Type信息解读</h4>
+
+<ul>
+<li><p><strong>index</strong>: 全表扫描, 只是扫描表的时候按照索引次序进行而不是行. 主要优点就是避免了排序, 但是开销仍然非常大.</p></li>
+
+<li><p><strong>ref</strong>: 连接不能基于关键字选择单个行, 可能查找到多个符合条件的行. 叫做ref是因为索引要跟某个参考值相比较. 这个参考值或者是一个数, 或者是来自一个表里的多表查询的结果值. 例:'SELECT * FROM tbl WHERE idx_col=expr;'.</p></li>
+</ul>
+
+<h4>Extra信息解读</h4>
+
+<ul>
+<li><strong>Using index</strong>: 只需通过索引就可以从表中获取列的信息, 无需额外去读取真实的行数据. 如果查询使用的列值仅仅是一个简单索引的部分值, 则会使用这种策略来优化查询.</li>
+</ul>
+
--- a/ast/rewrite.go
+++ b/ast/rewrite.go
@@ -312,7 +312,7 @@ func (rw *Rewrite) RewriteStandard() *Rewrite {
 	return rw
 }

-// RewriteAlwaysTrue alwaystrue: 删除恒真条件
+// RewriteAlwaysTrue always true: 删除恒真条件
 func (rw *Rewrite) RewriteAlwaysTrue() (reWriter *Rewrite) {
 	array := NewNodeList(rw.Stmt)
 	tNode := array.Head
@@ -340,7 +340,7 @@ func isAlwaysTrue(expr *sqlparser.ComparisonExpr) bool {
 		expr.Operator = "!="
 	case "<=>":
 		expr.Operator = "="
-	case ">=", "<=", "!=", "=":
+	case ">=", "<=", "!=", "=", ">", "<":
 	default:
 		return false
 	}

--- a/ast/rewrite_test.go
+++ b/ast/rewrite_test.go
@@ -433,10 +433,18 @@ func TestRewriteAlwaysTrue(t *testing.T) {
 			"input":  "SELECT count(col) FROM tbl where 1>=1;",
 			"output": "select count(col) from tbl",
 		},
+		{
+			"input":  "SELECT count(col) FROM tbl where 2>1;",
+			"output": "select count(col) from tbl",
+		},
 		{
 			"input":  "SELECT count(col) FROM tbl where 1<=1;",
 			"output": "select count(col) from tbl",
 		},
+		{
+			"input":  "SELECT count(col) FROM tbl where 1<2;",
+			"output": "select count(col) from tbl",
+		},
 		{
 			"input":  "SELECT count(col) FROM tbl where 1=1 and 2=2;",
 			"output": "select count(col) from tbl",
@@ -461,6 +469,10 @@ func TestRewriteAlwaysTrue(t *testing.T) {
 			"input":  "SELECT count(col) FROM tbl where (1=1);",
 			"output": "select count(col) from tbl",
 		},
+		{
+			"input":  "SELECT count(col) FROM tbl where a=1;",
+			"output": "select count(col) from tbl where a = 1",
+		},
 		{
 			"input":  "SELECT count(col) FROM tbl where ('a'= 'a' or 'b' = 'b') and a = 'b';",
 			"output": "select count(col) from tbl where a = 'b'",
@@ -777,6 +789,10 @@ func TestListRewriteRules(t *testing.T) {
 	common.Log.Debug("Entering function: %s", common.GetFunctionName())
 	err := common.GoldenDiff(func() {
 		ListRewriteRules(RewriteRules)
+		orgReportType := common.Config.ReportType
+		common.Config.ReportType = "json"
+		ListRewriteRules(RewriteRules)
+		common.Config.ReportType = orgReportType
 	}, t.Name(), update)
 	if err != nil {
 		t.Error(err)

--- a/ast/testdata/TestListRewriteRules.golden
+++ b/ast/testdata/TestListRewriteRules.golden
@@ -270,3 +270,143 @@ use sakila
 ```sql
 use sakila;
 ```
+[
+  {
+    "Name": "dml2select",
+    "Description": "将数据库更新请求转换为只读查询请求，便于执行EXPLAIN",
+    "Original": "DELETE FROM film WHERE length \u003e 100",
+    "Suggest": "select * from film where length \u003e 100"
+  },
+  {
+    "Name": "star2columns",
+    "Description": "为SELECT *补全表的列信息",
+    "Original": "SELECT * FROM film",
+    "Suggest": "select film.film_id, film.title from film"
+  },
+  {
+    "Name": "insertcolumns",
+    "Description": "为INSERT补全表的列信息",
+    "Original": "insert into film values(1,2,3,4,5)",
+    "Suggest": "insert into film(film_id, title, description, release_year, language_id) values (1, 2, 3, 4, 5)"
+  },
+  {
+    "Name": "having",
+    "Description": "将查询的 HAVING 子句改写为 WHERE 中的查询条件",
+    "Original": "SELECT state, COUNT(*) FROM Drivers GROUP BY state HAVING state IN ('GA', 'TX') ORDER BY state",
+    "Suggest": "select state, COUNT(*) from Drivers where state in ('GA', 'TX') group by state order by state asc"
+  },
+  {
+    "Name": "orderbynull",
+    "Description": "如果 GROUP BY 语句不指定 ORDER BY 条件会导致无谓的排序产生，如果不需要排序建议添加 ORDER BY NULL",
+    "Original": "SELECT sum(col1) FROM tbl GROUP BY col",
+    "Suggest": "select sum(col1) from tbl group by col order by null"
+  },
+  {
+    "Name": "unionall",
+    "Description": "可以接受重复的时间，使用 UNION ALL 替代 UNION 以提高查询效率",
+    "Original": "select country_id from city union select country_id from country",
+    "Suggest": "select country_id from city union all select country_id from country"
+  },
+  {
+    "Name": "or2in",
+    "Description": "将同一列不同条件的 OR 查询转写为 IN 查询",
+    "Original": "select country_id from city where col1 = 1 or (col2 = 1 or col2 = 2 ) or col1 = 3;",
+    "Suggest": "select country_id from city where (col2 in (1, 2)) or col1 in (1, 3);"
+  },
+  {
+    "Name": "innull",
+    "Description": "如果 IN 条件中可能有 NULL 值而又想匹配 NULL 值时，建议添加OR col IS NULL",
+    "Original": "暂不支持",
+    "Suggest": "暂不支持"
+  },
+  {
+    "Name": "or2union",
+    "Description": "将不同列的 OR 查询转为 UNION 查询，建议结合 unionall 重写策略一起使用",
+    "Original": "暂不支持",
+    "Suggest": "暂不支持"
+  },
+  {
+    "Name": "dmlorderby",
+    "Description": "删除 DML 更新操作中无意义的 ORDER BY",
+    "Original": "DELETE FROM tbl WHERE col1=1 ORDER BY col",
+    "Suggest": "delete from tbl where col1 = 1"
+  },
+  {
+    "Name": "sub2join",
+    "Description": "将子查询转换为JOIN查询",
+    "Original": "暂不支持",
+    "Suggest": "暂不支持"
+  },
+  {
+    "Name": "join2sub",
+    "Description": "将JOIN查询转换为子查询",
+    "Original": "暂不支持",
+    "Suggest": "暂不支持"
+  },
+  {
+    "Name": "distinctstar",
+    "Description": "DISTINCT *对有主键的表没有意义，可以将DISTINCT删掉",
+    "Original": "SELECT DISTINCT * FROM film;",
+    "Suggest": "SELECT * FROM film"
+  },
+  {
+    "Name": "standard",
+    "Description": "SQL标准化，如：关键字转换为小写",
+    "Original": "SELECT sum(col1) FROM tbl GROUP BY 1;",
+    "Suggest": "select sum(col1) from tbl group by 1"
+  },
+  {
+    "Name": "mergealter",
+    "Description": "合并同一张表的多条ALTER语句",
+    "Original": "ALTER TABLE t2 DROP COLUMN c;ALTER TABLE t2 DROP COLUMN d;",
+    "Suggest": "ALTER TABLE t2 DROP COLUMN c, DROP COLUMN d;"
+  },
+  {
+    "Name": "alwaystrue",
+    "Description": "删除无用的恒真判断条件",
+    "Original": "SELECT count(col) FROM tbl where 'a'= 'a' or ('b' = 'b' and a = 'b');",
+    "Suggest": "select count(col) from tbl where (a = 'b');"
+  },
+  {
+    "Name": "countstar",
+    "Description": "不建议使用COUNT(col)或COUNT(常量)，建议改写为COUNT(*)",
+    "Original": "SELECT count(col) FROM tbl GROUP BY 1;",
+    "Suggest": "SELECT count(*) FROM tbl GROUP BY 1;"
+  },
+  {
+    "Name": "innodb",
+    "Description": "建表时建议使用InnoDB引擎，非 InnoDB 引擎表自动转 InnoDB",
+    "Original": "CREATE TABLE t1(id bigint(20) NOT NULL AUTO_INCREMENT);",
+    "Suggest": "create table t1 (\n\tid bigint(20) not null auto_increment\n) ENGINE=InnoDB;"
+  },
+  {
+    "Name": "autoincrement",
+    "Description": "将autoincrement初始化为1",
+    "Original": "CREATE TABLE t1(id bigint(20) NOT NULL AUTO_INCREMENT) ENGINE=InnoDB AUTO_INCREMENT=123802;",
+    "Suggest": "create table t1(id bigint(20) not null auto_increment) ENGINE=InnoDB auto_increment=1;"
+  },
+  {
+    "Name": "intwidth",
+    "Description": "整型数据类型修改默认显示宽度",
+    "Original": "create table t1 (id int(20) not null auto_increment) ENGINE=InnoDB;",
+    "Suggest": "create table t1 (id int(10) not null auto_increment) ENGINE=InnoDB;"
+  },
+  {
+    "Name": "truncate",
+    "Description": "不带 WHERE 条件的 DELETE 操作建议修改为 TRUNCATE",
+    "Original": "DELETE FROM tbl",
+    "Suggest": "truncate table tbl"
+  },
+  {
+    "Name": "rmparenthesis",
+    "Description": "去除没有意义的括号",
+    "Original": "select col from table where (col = 1);",
+    "Suggest": "select col from table where col = 1;"
+  },
+  {
+    "Name": "delimiter",
+    "Description": "补全DELIMITER",
+    "Original": "use sakila",
+    "Suggest": "use sakila;"
+  }
+]
--- a/database/explain.go
+++ b/database/explain.go
@@ -604,6 +604,9 @@ func MySQLExplainWarnings(exp *ExplainInfo) string {
 // MySQLExplainQueryCost 将last_query_cost信息补充到评审结果中
 func MySQLExplainQueryCost(exp *ExplainInfo) string {
 	var content string
+	if exp == nil {
+		return content
+	}
 	if exp.QueryCost > 0 {

 		tmp := fmt.Sprintf("%.3f\n", exp.QueryCost)
@@ -819,7 +822,7 @@ func parseTraditionalExplainText(content string) (explainRows []*ExplainRow, err
 		}
 		// filtered may larger than 100.00
 		// https://bugs.mysql.com/bug.php?id=34124
-		if filtered > 100.00 {
+		if filtered >= 100.00 {
 			filtered = 100.00
 		}

@@ -1039,6 +1042,7 @@ func ParseExplainResult(res QueryResult, formatType int) (exp *ExplainInfo, err

 // Explain 获取 SQL 的 explain 信息
 func (db *Connector) Explain(sql string, explainType int, formatType int) (exp *ExplainInfo, err error) {
+	exp = &ExplainInfo{SQL: sql}
 	if explainType != TraditionalExplainType {
 		formatType = TraditionalFormatExplain
 	}
@@ -1054,13 +1058,14 @@ func (db *Connector) Explain(sql string, explainType int, formatType int) (exp *
 	}()

 	// 执行EXPLAIN请求
-	sql = db.explainQuery(sql, explainType, formatType)
-	res, err := db.Query(sql)
+	exp.SQL = db.explainQuery(sql, explainType, formatType)
+	res, err := db.Query(exp.SQL)
+	if err != nil {
+		return exp, err
+	}

 	// 解析mysql结果，输出ExplainInfo
 	exp, err = ParseExplainResult(res, formatType)
-	exp.SQL = sql
-
 	return exp, err
 }


--- a/database/explain_test.go
+++ b/database/explain_test.go
@@ -17,6 +17,7 @@
 package database

 import (
+	"fmt"
 	"testing"

 	"github.com/XiaoMi/soar/common"
@@ -2439,12 +2440,13 @@ func TestMySQLExplainWarnings(t *testing.T) {

 func TestMySQLExplainQueryCost(t *testing.T) {
 	common.Log.Debug("Entering function: %s", common.GetFunctionName())
-	expInfo, err := connTest.Explain("select 1", TraditionalExplainType, TraditionalFormatExplain)
-	if err != nil {
-		t.Error(err)
-	}
-	err = common.GoldenDiff(func() {
-		MySQLExplainQueryCost(expInfo)
+	err := common.GoldenDiff(func() {
+		expInfo, err := connTest.Explain("select 1", TraditionalExplainType, TraditionalFormatExplain)
+		fmt.Println(err, MySQLExplainQueryCost(expInfo))
+		expInfo, err = connTest.Explain("select 1", ExtendedExplainType, TraditionalFormatExplain)
+		fmt.Println(err, MySQLExplainQueryCost(expInfo))
+		expInfo, err = connTest.Explain("select 1", TraditionalExplainType, JSONFormatExplain)
+		fmt.Println(err, MySQLExplainQueryCost(expInfo))
 	}, t.Name(), update)
 	if err != nil {
 		t.Error(err)

--- a/database/mysql.go
+++ b/database/mysql.go
@@ -279,6 +279,7 @@ func (db *Connector) dangerousQuery(query string) bool {
 			"show",
 			"explain",
 			"describe",
+			"desc",
 		}

 		for _, prefix := range whiteList {

--- a/database/profiling_test.go
+++ b/database/profiling_test.go
@@ -30,6 +30,10 @@ func TestProfiling(t *testing.T) {
 		t.Error(err)
 	}
 	pretty.Println(rows)
+	_, err = connTest.Profiling("delete from film")
+	if err == nil {
+		t.Error(err)
+	}
 	common.Log.Debug("Exiting function: %s", common.GetFunctionName())
 }


--- a/database/testdata/TestMySQLExplainQueryCost.golden
+++ b/database/testdata/TestMySQLExplainQueryCost.golden
+<nil> 
+<nil> 
+<nil>