From 8cb120ee74c2501fd505f167ad2a07d4a0eb471c Mon Sep 17 00:00:00 2001 From: qingxinhome <70939751+qingxinhome@users.noreply.github.com> Date: Wed, 27 Nov 2024 18:46:21 +0800 Subject: [PATCH] MySQL compatible order by clause rules (#20368) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 兼容Mysql的order by子句； 1. order by子句在检索 排序键时，应当从所在查询子句的project list列表中查找，如果没有就从表中查找 2. project list列表中可以存在同名的投影列（有别名就是别名，没有别名就列名或者表达式） 3. 但是order by子句中引用的排序键不允许在project list列表重复，如果没有出现在project list就要在表中查找，如果仍然有重名，就要报错， 即不能有歧义 mo在投影列表中，只要有一个列使用了别名，都会从别名中查找排序键 注意： projectList是第一级，先在projectList中查找，看能否找到且不重复，如果重复，则报错，注意：projectlist的别名和projectList属于同一级别，如果找不到则从表中查找，看能否找到且不重复，如果重复，则报错 Approved by: @badboynt1, @ouyuanning, @aunjgr, @heni02 --- pkg/sql/plan/bind_context.go | 1 + pkg/sql/plan/order_binder.go | 53 ++++++ pkg/sql/plan/query_builder.go | 13 ++ pkg/sql/plan/types.go | 12 +- .../cases/dml/select/order_by_clause.result | 160 ++++++++++++++++++ .../cases/dml/select/order_by_clause.sql | 99 +++++++++++ .../cases/function/func_math_floor.result | 2 +- 7 files changed, 338 insertions(+), 2 deletions(-) create mode 100644 test/distributed/cases/dml/select/order_by_clause.result create mode 100644 test/distributed/cases/dml/select/order_by_clause.sql diff --git a/pkg/sql/plan/bind_context.go b/pkg/sql/plan/bind_context.go index 69f7f68d245b6..465737e9c8a6f 100644 --- a/pkg/sql/plan/bind_context.go +++ b/pkg/sql/plan/bind_context.go @@ -33,6 +33,7 @@ func NewBindContext(builder *QueryBuilder, parent *BindContext) *BindContext { windowByAst: make(map[string]int32), timeByAst: make(map[string]int32), aliasMap: make(map[string]*aliasItem), + aliasFrequency: make(map[string]int), bindingByTag: make(map[int32]*Binding), bindingByTable: make(map[string]*Binding), bindingByCol: make(map[string]*Binding), diff --git a/pkg/sql/plan/order_binder.go b/pkg/sql/plan/order_binder.go index e21ff02b664a8..ac837f2223615 100644 --- a/pkg/sql/plan/order_binder.go +++ b/pkg/sql/plan/order_binder.go @@ -29,7 +29,20 @@ func NewOrderBinder(projectionBinder *ProjectionBinder, selectList tree.SelectEx func (b *OrderBinder) BindExpr(astExpr tree.Expr) (*plan.Expr, error) { if colRef, ok := astExpr.(*tree.UnresolvedName); ok && colRef.NumParts == 1 { + if frequency, ok := b.ctx.aliasFrequency[colRef.ColName()]; ok && frequency > 1 { + return nil, moerr.NewInvalidInputf(b.GetContext(), "Column '%s' in order clause is ambiguous", colRef.ColName()) + } + if selectItem, ok := b.ctx.aliasMap[colRef.ColName()]; ok { + for _, selectField := range b.ctx.projectByAst { + if selectField.aliasName != "" { + continue + } + if projectField, ok1 := selectField.ast.(*tree.UnresolvedName); ok1 && projectField.ColName() == colRef.ColName() { + return nil, moerr.NewInvalidInputf(b.GetContext(), "Column '%s' in order clause is ambiguous", colRef.ColName()) + } + } + return &plan.Expr{ Typ: b.ctx.projects[selectItem.idx].Typ, Expr: &plan.Expr_Col{ @@ -39,6 +52,46 @@ func (b *OrderBinder) BindExpr(astExpr tree.Expr) (*plan.Expr, error) { }, }, }, nil + } else { + var matchedFields []int32 // SelectField index used to record matches + var matchedExpr *plan.Expr // Used to save matched expr + + for _, selectField := range b.ctx.projectByAst { + if selectField.aliasName != "" { + if selectField.aliasName == colRef.ColName() { + // Record the selectField index that matches + matchedFields = append(matchedFields, selectField.pos) + // Save matching expr + matchedExpr = b.ctx.projects[selectField.pos] + } else { + continue + } + } else if projectField, ok1 := selectField.ast.(*tree.UnresolvedName); ok1 && projectField.ColName() == colRef.ColName() { + // Record the selectField index that matches + matchedFields = append(matchedFields, selectField.pos) + // Save matching expr + matchedExpr = &plan.Expr{ + Typ: b.ctx.projects[selectField.pos].Typ, + Expr: &plan.Expr_Col{ + Col: &plan.ColRef{ + RelPos: b.ctx.projectTag, + ColPos: selectField.pos, + }, + }, + } + continue + } + } + + // If multiple selectFields are matched, an error occurs + if len(matchedFields) > 1 { + return nil, moerr.NewInvalidInputf(b.GetContext(), "Column '%s' in order clause is ambiguous", colRef.ColName()) + } + + // If there is only one matching expr, return that expr + if matchedExpr != nil { + return matchedExpr, nil + } } } diff --git a/pkg/sql/plan/query_builder.go b/pkg/sql/plan/query_builder.go index 14a53ee858fe6..d24f1bee210e1 100644 --- a/pkg/sql/plan/query_builder.go +++ b/pkg/sql/plan/query_builder.go @@ -24,6 +24,7 @@ import ( "time" "github.com/google/uuid" + "github.com/matrixorigin/matrixone/pkg/catalog" "github.com/matrixorigin/matrixone/pkg/common/moerr" "github.com/matrixorigin/matrixone/pkg/container/types" @@ -2178,6 +2179,7 @@ func (builder *QueryBuilder) buildUnion(stmt *tree.UnionClause, astOrderBy tree. ctx.aliasMap[v] = &aliasItem{ idx: int32(i), } + ctx.aliasFrequency[v]++ builder.nameByColRef[[2]int32{ctx.projectTag, int32(i)}] = v } for i, expr := range firstSelectProjectNode.ProjectList { @@ -2831,7 +2833,18 @@ func (builder *QueryBuilder) bindSelect(stmt *tree.Select, ctx *BindContext, isR idx: int32(i), astExpr: selectList[i].Expr, } + ctx.aliasFrequency[selectList[i].As.Compare()]++ + } + + field := SelectField{ + ast: selectList[i].Expr, + pos: int32(i), + } + + if selectList[i].As != nil && !selectList[i].As.Empty() { + field.aliasName = selectList[i].As.Compare() } + ctx.projectByAst = append(ctx.projectByAst, field) } if astTimeWindow != nil { diff --git a/pkg/sql/plan/types.go b/pkg/sql/plan/types.go index 127f77a2d5d84..98e607fc9ac68 100644 --- a/pkg/sql/plan/types.go +++ b/pkg/sql/plan/types.go @@ -270,9 +270,12 @@ type BindContext struct { projectByExpr map[string]int32 timeByAst map[string]int32 + projectByAst []SelectField + timeAsts []tree.Expr - aliasMap map[string]*aliasItem + aliasMap map[string]*aliasItem + aliasFrequency map[string]int bindings []*Binding bindingByTag map[int32]*Binding //rel_pos @@ -303,6 +306,13 @@ type BindContext struct { groupingFlag []bool } +type SelectField struct { + ast tree.Expr + // AsName is alias name for Expr + aliasName string + pos int32 +} + type NameTuple struct { table string col string diff --git a/test/distributed/cases/dml/select/order_by_clause.result b/test/distributed/cases/dml/select/order_by_clause.result new file mode 100644 index 0000000000000..dc854e501ca3c --- /dev/null +++ b/test/distributed/cases/dml/select/order_by_clause.result @@ -0,0 +1,160 @@ +DROP TABLE IF EXISTS dept; +create table dept( +deptno int unsigned auto_increment COMMENT '部门编号', +dname varchar(15) COMMENT '部门名称', +loc varchar(50) COMMENT '部门所在位置', +primary key(deptno) +) COMMENT='部门表'; +INSERT INTO dept VALUES (10,'ACCOUNTING','NEW YORK'); +INSERT INTO dept VALUES (20,'RESEARCH','DALLAS'); +INSERT INTO dept VALUES (30,'SALES','CHICAGO'); +INSERT INTO dept VALUES (40,'OPERATIONS','BOSTON'); +DROP TABLE IF EXISTS emp; +create table emp( +empno int unsigned auto_increment COMMENT '雇员编号', +ename varchar(15) COMMENT '雇员姓名', +job varchar(10) COMMENT '雇员职位', +mgr int unsigned COMMENT '雇员对应的领导的编号', +hiredate date COMMENT '雇员的雇佣日期', +sal decimal(7,2) COMMENT '雇员的基本工资', +comm decimal(7,2) COMMENT '奖金', +deptno int unsigned COMMENT '所在部门', +primary key(empno) +) COMMENT='雇员表'; +INSERT INTO emp VALUES (7369,'SMITH','CLERK',7902,'1980-12-17',800,NULL,20); +INSERT INTO emp VALUES (7499,'ALLEN','SALESMAN',7698,'1981-02-20',1600,300,30); +INSERT INTO emp VALUES (7521,'WARD','SALESMAN',7698,'1981-02-22',1250,500,30); +INSERT INTO emp VALUES (7566,'JONES','MANAGER',7839,'1981-04-02',2975,NULL,20); +INSERT INTO emp VALUES (7654,'MARTIN','SALESMAN',7698,'1981-09-28',1250,1400,30); +INSERT INTO emp VALUES (7698,'BLAKE','MANAGER',7839,'1981-05-01',2850,NULL,30); +INSERT INTO emp VALUES (7782,'CLARK','MANAGER',7839,'1981-06-09',2450,NULL,10); +INSERT INTO emp VALUES (7788,'SCOTT','ANALYST',7566,'0087-07-13',3000,NULL,20); +INSERT INTO emp VALUES (7839,'KING','PRESIDENT',NULL,'1981-11-17',5000,NULL,10); +INSERT INTO emp VALUES (7844,'TURNER','SALESMAN',7698,'1981-09-08',1500,0,30); +INSERT INTO emp VALUES (7876,'ADAMS','CLERK',7788,'0087-07-13',1100,NULL,20); +INSERT INTO emp VALUES (7900,'JAMES','CLERK',7698,'1981-12-03',950,NULL,30); +INSERT INTO emp VALUES (7902,'FORD','ANALYST',7566,'1981-12-03',3000,NULL,20); +INSERT INTO emp VALUES (7934,'MILLER','CLERK',7782,'1982-01-23',1300,NULL,10); +select t1.*, t2.deptno as deptno from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; +invalid input: Column 'deptno' in order clause is ambiguous +select t1.*, t2.deptno from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; +invalid input: Column 'deptno' in order clause is ambiguous +mysql> select empno X1, ename X1, sal X1 from emp where sal > 200 order by X1; +SQL parser error: You have an error in your SQL syntax; check the manual that corresponds to your MatrixOne server version for the right syntax to use. syntax error at line 1 column 5 near "mysql> select empno X1, ename X1, sal X1 from emp where sal > 200 order by X1;"; +select t2.dname, t1.* from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; +dname empno ename job mgr hiredate sal comm deptno +ACCOUNTING 7782 CLARK MANAGER 7839 1981-06-09 2450.00 null 10 +ACCOUNTING 7934 MILLER CLERK 7782 1982-01-23 1300.00 null 10 +ACCOUNTING 7839 KING PRESIDENT null 1981-11-17 5000.00 null 10 +RESEARCH 7566 JONES MANAGER 7839 1981-04-02 2975.00 null 20 +RESEARCH 7369 SMITH CLERK 7902 1980-12-17 800.00 null 20 +RESEARCH 7788 SCOTT ANALYST 7566 0087-07-13 3000.00 null 20 +RESEARCH 7876 ADAMS CLERK 7788 0087-07-13 1100.00 null 20 +RESEARCH 7902 FORD ANALYST 7566 1981-12-03 3000.00 null 20 +SALES 7654 MARTIN SALESMAN 7698 1981-09-28 1250.00 1400.00 30 +SALES 7698 BLAKE MANAGER 7839 1981-05-01 2850.00 null 30 +SALES 7521 WARD SALESMAN 7698 1981-02-22 1250.00 500.00 30 +SALES 7844 TURNER SALESMAN 7698 1981-09-08 1500.00 0.00 30 +SALES 7900 JAMES CLERK 7698 1981-12-03 950.00 null 30 +SALES 7499 ALLEN SALESMAN 7698 1981-02-20 1600.00 300.00 30 +select t2.dname as deptname, t1.* from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; +deptname empno ename job mgr hiredate sal comm deptno +ACCOUNTING 7782 CLARK MANAGER 7839 1981-06-09 2450.00 null 10 +ACCOUNTING 7934 MILLER CLERK 7782 1982-01-23 1300.00 null 10 +ACCOUNTING 7839 KING PRESIDENT null 1981-11-17 5000.00 null 10 +RESEARCH 7566 JONES MANAGER 7839 1981-04-02 2975.00 null 20 +RESEARCH 7369 SMITH CLERK 7902 1980-12-17 800.00 null 20 +RESEARCH 7788 SCOTT ANALYST 7566 0087-07-13 3000.00 null 20 +RESEARCH 7876 ADAMS CLERK 7788 0087-07-13 1100.00 null 20 +RESEARCH 7902 FORD ANALYST 7566 1981-12-03 3000.00 null 20 +SALES 7654 MARTIN SALESMAN 7698 1981-09-28 1250.00 1400.00 30 +SALES 7698 BLAKE MANAGER 7839 1981-05-01 2850.00 null 30 +SALES 7521 WARD SALESMAN 7698 1981-02-22 1250.00 500.00 30 +SALES 7844 TURNER SALESMAN 7698 1981-09-08 1500.00 0.00 30 +SALES 7900 JAMES CLERK 7698 1981-12-03 950.00 null 30 +SALES 7499 ALLEN SALESMAN 7698 1981-02-20 1600.00 300.00 30 +select t2.dname as deptname, t1.* from emp t1 left join dept t2 on t1.deptno = t2.deptno where '1' = '1' order by deptno; +deptname empno ename job mgr hiredate sal comm deptno +ACCOUNTING 7782 CLARK MANAGER 7839 1981-06-09 2450.00 null 10 +ACCOUNTING 7934 MILLER CLERK 7782 1982-01-23 1300.00 null 10 +ACCOUNTING 7839 KING PRESIDENT null 1981-11-17 5000.00 null 10 +RESEARCH 7566 JONES MANAGER 7839 1981-04-02 2975.00 null 20 +RESEARCH 7369 SMITH CLERK 7902 1980-12-17 800.00 null 20 +RESEARCH 7788 SCOTT ANALYST 7566 0087-07-13 3000.00 null 20 +RESEARCH 7876 ADAMS CLERK 7788 0087-07-13 1100.00 null 20 +RESEARCH 7902 FORD ANALYST 7566 1981-12-03 3000.00 null 20 +SALES 7654 MARTIN SALESMAN 7698 1981-09-28 1250.00 1400.00 30 +SALES 7698 BLAKE MANAGER 7839 1981-05-01 2850.00 null 30 +SALES 7521 WARD SALESMAN 7698 1981-02-22 1250.00 500.00 30 +SALES 7844 TURNER SALESMAN 7698 1981-09-08 1500.00 0.00 30 +SALES 7900 JAMES CLERK 7698 1981-12-03 950.00 null 30 +SALES 7499 ALLEN SALESMAN 7698 1981-02-20 1600.00 300.00 30 +select t2.dname as deptname, t1.* from emp t1 left join dept t2 on t1.deptno = t2.deptno where '1' = '1' order by deptno, empno; +deptname empno ename job mgr hiredate sal comm deptno +ACCOUNTING 7782 CLARK MANAGER 7839 1981-06-09 2450.00 null 10 +ACCOUNTING 7839 KING PRESIDENT null 1981-11-17 5000.00 null 10 +ACCOUNTING 7934 MILLER CLERK 7782 1982-01-23 1300.00 null 10 +RESEARCH 7369 SMITH CLERK 7902 1980-12-17 800.00 null 20 +RESEARCH 7566 JONES MANAGER 7839 1981-04-02 2975.00 null 20 +RESEARCH 7788 SCOTT ANALYST 7566 0087-07-13 3000.00 null 20 +RESEARCH 7876 ADAMS CLERK 7788 0087-07-13 1100.00 null 20 +RESEARCH 7902 FORD ANALYST 7566 1981-12-03 3000.00 null 20 +SALES 7499 ALLEN SALESMAN 7698 1981-02-20 1600.00 300.00 30 +SALES 7521 WARD SALESMAN 7698 1981-02-22 1250.00 500.00 30 +SALES 7654 MARTIN SALESMAN 7698 1981-09-28 1250.00 1400.00 30 +SALES 7698 BLAKE MANAGER 7839 1981-05-01 2850.00 null 30 +SALES 7844 TURNER SALESMAN 7698 1981-09-08 1500.00 0.00 30 +SALES 7900 JAMES CLERK 7698 1981-12-03 950.00 null 30 +select t2.dname as deptname, t1.* +from emp t1 left join dept t2 on t1.deptno = t2.deptno where '1' = '1' +group by t1.ename +order by deptno; +SQL syntax error: column "t2.dname" must appear in the GROUP BY clause or be used in an aggregate function +select t1.*, t2.loc, t2.deptno as deptno from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; +invalid input: Column 'deptno' in order clause is ambiguous +select t1.ename, t2.loc, t2.deptno as deptno from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; +ename loc deptno +CLARK NEW YORK 10 +MILLER NEW YORK 10 +KING NEW YORK 10 +JONES DALLAS 20 +SMITH DALLAS 20 +SCOTT DALLAS 20 +ADAMS DALLAS 20 +FORD DALLAS 20 +MARTIN CHICAGO 30 +BLAKE CHICAGO 30 +WARD CHICAGO 30 +TURNER CHICAGO 30 +JAMES CHICAGO 30 +ALLEN CHICAGO 30 +select t1.ename, t2.loc from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; +invalid input: ambiguouse column reference to 'deptno' +select t1.ename, t2.loc, t2.deptno as deptno from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno+33; +ename loc deptno +CLARK NEW YORK 10 +MILLER NEW YORK 10 +KING NEW YORK 10 +JONES DALLAS 20 +SMITH DALLAS 20 +SCOTT DALLAS 20 +ADAMS DALLAS 20 +FORD DALLAS 20 +MARTIN CHICAGO 30 +BLAKE CHICAGO 30 +WARD CHICAGO 30 +TURNER CHICAGO 30 +JAMES CHICAGO 30 +ALLEN CHICAGO 30 +select t1.ename, t2.loc from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; +invalid input: ambiguouse column reference to 'deptno' +select ename, (select ename from emp i1 where i1.empno = emp.mgr order by 1 limit 1) as ename from emp order by ename; +invalid input: Column 'ename' in order clause is ambiguous +select empno, (select ename from emp i1 where i1.empno = emp.mgr order by 1 limit 1) as ename, ename from emp order by ename; +invalid input: Column 'ename' in order clause is ambiguous +select empno, 20 as empno from emp order by empno; +invalid input: Column 'empno' in order clause is ambiguous +select empno, space(50) as empno from emp order by empno; +invalid input: Column 'empno' in order clause is ambiguous +drop table if exists dept; +drop table if exists emp; diff --git a/test/distributed/cases/dml/select/order_by_clause.sql b/test/distributed/cases/dml/select/order_by_clause.sql new file mode 100644 index 0000000000000..69beadc6d0250 --- /dev/null +++ b/test/distributed/cases/dml/select/order_by_clause.sql @@ -0,0 +1,99 @@ +DROP TABLE IF EXISTS dept; +create table dept( + deptno int unsigned auto_increment COMMENT '部门编号', + dname varchar(15) COMMENT '部门名称', + loc varchar(50) COMMENT '部门所在位置', + primary key(deptno) +) COMMENT='部门表'; + +INSERT INTO dept VALUES (10,'ACCOUNTING','NEW YORK'); +INSERT INTO dept VALUES (20,'RESEARCH','DALLAS'); +INSERT INTO dept VALUES (30,'SALES','CHICAGO'); +INSERT INTO dept VALUES (40,'OPERATIONS','BOSTON'); + +DROP TABLE IF EXISTS emp; +create table emp( + empno int unsigned auto_increment COMMENT '雇员编号', + ename varchar(15) COMMENT '雇员姓名', + job varchar(10) COMMENT '雇员职位', + mgr int unsigned COMMENT '雇员对应的领导的编号', + hiredate date COMMENT '雇员的雇佣日期', + sal decimal(7,2) COMMENT '雇员的基本工资', + comm decimal(7,2) COMMENT '奖金', + deptno int unsigned COMMENT '所在部门', + primary key(empno) +) COMMENT='雇员表'; + +INSERT INTO emp VALUES (7369,'SMITH','CLERK',7902,'1980-12-17',800,NULL,20); +INSERT INTO emp VALUES (7499,'ALLEN','SALESMAN',7698,'1981-02-20',1600,300,30); +INSERT INTO emp VALUES (7521,'WARD','SALESMAN',7698,'1981-02-22',1250,500,30); +INSERT INTO emp VALUES (7566,'JONES','MANAGER',7839,'1981-04-02',2975,NULL,20); +INSERT INTO emp VALUES (7654,'MARTIN','SALESMAN',7698,'1981-09-28',1250,1400,30); +INSERT INTO emp VALUES (7698,'BLAKE','MANAGER',7839,'1981-05-01',2850,NULL,30); +INSERT INTO emp VALUES (7782,'CLARK','MANAGER',7839,'1981-06-09',2450,NULL,10); +INSERT INTO emp VALUES (7788,'SCOTT','ANALYST',7566,'0087-07-13',3000,NULL,20); +INSERT INTO emp VALUES (7839,'KING','PRESIDENT',NULL,'1981-11-17',5000,NULL,10); +INSERT INTO emp VALUES (7844,'TURNER','SALESMAN',7698,'1981-09-08',1500,0,30); +INSERT INTO emp VALUES (7876,'ADAMS','CLERK',7788,'0087-07-13',1100,NULL,20); +INSERT INTO emp VALUES (7900,'JAMES','CLERK',7698,'1981-12-03',950,NULL,30); +INSERT INTO emp VALUES (7902,'FORD','ANALYST',7566,'1981-12-03',3000,NULL,20); +INSERT INTO emp VALUES (7934,'MILLER','CLERK',7782,'1982-01-23',1300,NULL,10); + +--1.mysql：ERROR; mo: ERROR --ERROR 1052 (23000): Column 'deptno' in order clause is ambiguous +select t1.*, t2.deptno as deptno from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; + +--2.mysql：ERROR; mo: ERROR --ERROR 1052 (23000): Column 'deptno' in order clause is ambiguous +select t1.*, t2.deptno from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; + +--3.mysql：ERROR; mo: ERROR --ERROR 1052 (23000): Column 'X1' in order clause is ambiguous +mysql> select empno X1, ename X1, sal X1 from emp where sal > 200 order by X1; + +--4.mysql：ok; mo: ok; +select t2.dname, t1.* from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; + +--5.mysql：ok; mo: ok +select t2.dname as deptname, t1.* from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; + +--6.mysql：ok; mo: ok +select t2.dname as deptname, t1.* from emp t1 left join dept t2 on t1.deptno = t2.deptno where '1' = '1' order by deptno; + +--7.mysql：ok; mo: ok +select t2.dname as deptname, t1.* from emp t1 left join dept t2 on t1.deptno = t2.deptno where '1' = '1' order by deptno, empno; + +--8.mysql：ok; mo: ok +select t2.dname as deptname, t1.* +from emp t1 left join dept t2 on t1.deptno = t2.deptno where '1' = '1' +group by t1.ename +order by deptno; + +--9.mysql：ERROR; mo: ERROR +select t1.*, t2.loc, t2.deptno as deptno from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; + +--10.mysql：ok; mo: ok +select t1.ename, t2.loc, t2.deptno as deptno from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; + +--11. mysql：error; mo: error +select t1.ename, t2.loc from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; + +--12. mysql: error, 别名不会参与order by表达式运算, mo: ok(bug) +select t1.ename, t2.loc, t2.deptno as deptno from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno+33; + +--13.mysql：error; mo: error +select t1.ename, t2.loc from emp t1 left join dept t2 on t1.deptno = t2.deptno order by deptno; + +--14.mysql：ok, mo: error(bug,暂时选择报错) +-- mysql的别名是有作用域的， 通常selectList中子查询别名的优先级较高，即使主查询和子查询使用了相同的别名 ename， +-- 排序键冲突时MySQL会优先选择子查询别名， +select ename, (select ename from emp i1 where i1.empno = emp.mgr order by 1 limit 1) as ename from emp order by ename; + +--15.mysql：ok, mo: error(bug,暂时选择报错) (同上) +select empno, (select ename from emp i1 where i1.empno = emp.mgr order by 1 limit 1) as ename, ename from emp order by ename; + +--16.mysql: ok, mo: error(bug,暂时选择报错) +select empno, 20 as empno from emp order by empno; + +--17..mysql: ok, mo: error(bug,暂时选择报错) (同上) +select empno, space(50) as empno from emp order by empno; + +drop table if exists dept; +drop table if exists emp; diff --git a/test/distributed/cases/function/func_math_floor.result b/test/distributed/cases/function/func_math_floor.result index f7a140150999f..7ee725e7e3631 100644 --- a/test/distributed/cases/function/func_math_floor.result +++ b/test/distributed/cases/function/func_math_floor.result @@ -89,7 +89,7 @@ SELECT a, (SELECT space(250) FROM t1 i1 WHERE i1.b=t1.a ORDER BY 1 LIMIT 1) AS a FROM t1 ORDER BY a LIMIT 5; -a a +invalid input: Column 'a' in order clause is ambiguous DROP TABLE t1; SELECT DATE(FLOOR(20110512154559.616)); date(floor(20110512154559.616))