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Administrator
h2database
Commits
3b4620a2
Unverified
提交
3b4620a2
authored
9月 19, 2018
作者:
Evgenij Ryazanov
提交者:
GitHub
9月 19, 2018
浏览文件
操作
浏览文件
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差异文件
Merge pull request #1459 from katzyn/window
Improve window clause correctness checks
上级
b0105180
5bedf88f
显示空白字符变更
内嵌
并排
正在显示
9 个修改的文件
包含
174 行增加
和
87 行删除
+174
-87
help.csv
h2/src/docsrc/help/help.csv
+1
-1
Parser.java
h2/src/main/org/h2/command/Parser.java
+22
-34
AbstractAggregate.java
...c/main/org/h2/expression/aggregate/AbstractAggregate.java
+13
-8
Window.java
h2/src/main/org/h2/expression/aggregate/Window.java
+8
-10
WindowFrame.java
h2/src/main/org/h2/expression/aggregate/WindowFrame.java
+31
-6
WindowFunction.java
h2/src/main/org/h2/expression/aggregate/WindowFunction.java
+31
-3
lead.sql
h2/src/test/org/h2/test/scripts/functions/window/lead.sql
+12
-0
ntile.sql
h2/src/test/org/h2/test/scripts/functions/window/ntile.sql
+5
-0
row_number.sql
.../test/org/h2/test/scripts/functions/window/row_number.sql
+51
-25
没有找到文件。
h2/src/docsrc/help/help.csv
浏览文件 @
3b4620a2
...
...
@@ -2555,7 +2555,7 @@ ROWS|RANGE|GROUP
[EXCLUDE {CURRENT ROW|GROUP|TIES|NO OTHERS}]
","
A window frame clause.
Is currently supported only in
aggregates and FIRST_VALUE(), LAST_VALUE(), and NTH_VALUE() window functions.
May be specified only for
aggregates and FIRST_VALUE(), LAST_VALUE(), and NTH_VALUE() window functions.
","
RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW EXCLUDE GROUP
"
...
...
h2/src/main/org/h2/command/Parser.java
浏览文件 @
3b4620a2
...
...
@@ -3049,6 +3049,17 @@ public class Parser {
}
Window
over
=
null
;
if
(
readIf
(
"OVER"
))
{
over
=
readWindowSpecification
();
aggregate
.
setOverCondition
(
over
);
currentSelect
.
setWindowQuery
();
}
else
if
(!
isAggregate
)
{
throw
getSyntaxError
();
}
else
{
currentSelect
.
setGroupQuery
();
}
}
private
Window
readWindowSpecification
()
{
read
(
OPEN_PAREN
);
ArrayList
<
Expression
>
partitionBy
=
null
;
if
(
readIf
(
"PARTITION"
))
{
...
...
@@ -3063,33 +3074,10 @@ public class Parser {
if
(
readIf
(
ORDER
))
{
read
(
"BY"
);
orderBy
=
parseSimpleOrderList
();
}
else
if
(!
isAggregate
)
{
orderBy
=
new
ArrayList
<>(
0
);
}
WindowFrame
frame
;
if
(
aggregate
instanceof
WindowFunction
)
{
WindowFunction
w
=
(
WindowFunction
)
aggregate
;
switch
(
w
.
getFunctionType
())
{
case
FIRST_VALUE:
case
LAST_VALUE:
case
NTH_VALUE:
frame
=
readWindowFrame
();
break
;
default
:
frame
=
null
;
}
}
else
{
frame
=
readWindowFrame
();
}
WindowFrame
frame
=
readWindowFrame
();
read
(
CLOSE_PAREN
);
over
=
new
Window
(
partitionBy
,
orderBy
,
frame
);
aggregate
.
setOverCondition
(
over
);
currentSelect
.
setWindowQuery
();
}
else
if
(!
isAggregate
)
{
throw
getSyntaxError
();
}
else
{
currentSelect
.
setGroupQuery
();
}
return
new
Window
(
partitionBy
,
orderBy
,
frame
);
}
private
WindowFrame
readWindowFrame
()
{
...
...
h2/src/main/org/h2/expression/aggregate/AbstractAggregate.java
浏览文件 @
3b4620a2
...
...
@@ -118,6 +118,8 @@ public abstract class AbstractAggregate extends Expression {
ArrayList
<
SelectOrderBy
>
orderBy
=
over
.
getOrderBy
();
if
(
orderBy
!=
null
)
{
overOrderBySort
=
createOrder
(
session
,
orderBy
,
getNumExpressions
());
}
else
if
(!
isAggregate
())
{
overOrderBySort
=
new
SortOrder
(
session
.
getDatabase
(),
new
int
[
getNumExpressions
()],
new
int
[
0
],
null
);
}
}
return
this
;
...
...
@@ -176,7 +178,7 @@ public abstract class AbstractAggregate extends Expression {
}
if
(
over
!=
null
)
{
ArrayList
<
SelectOrderBy
>
orderBy
=
over
.
getOrderBy
();
if
(
orderBy
!=
null
)
{
if
(
orderBy
!=
null
||
!
isAggregate
()
)
{
updateOrderedAggregate
(
session
,
groupData
,
groupRowId
,
orderBy
);
return
;
}
...
...
@@ -359,7 +361,7 @@ public abstract class AbstractAggregate extends Expression {
data
=
partition
.
getData
();
}
}
if
(
over
.
getOrderBy
()
!=
null
)
{
if
(
over
.
getOrderBy
()
!=
null
||
!
isAggregate
()
)
{
return
getOrderedResult
(
session
,
groupData
,
partition
,
data
);
}
Value
result
=
partition
.
getResult
();
...
...
@@ -384,10 +386,11 @@ public abstract class AbstractAggregate extends Expression {
private
void
updateOrderedAggregate
(
Session
session
,
SelectGroups
groupData
,
int
groupRowId
,
ArrayList
<
SelectOrderBy
>
orderBy
)
{
int
ne
=
getNumExpressions
();
int
size
=
orderBy
.
size
()
;
int
size
=
orderBy
!=
null
?
orderBy
.
size
()
:
0
;
Value
[]
array
=
new
Value
[
ne
+
size
+
1
];
rememberExpressions
(
session
,
array
);
for
(
int
i
=
0
;
i
<
size
;
i
++)
{
@SuppressWarnings
(
"null"
)
SelectOrderBy
o
=
orderBy
.
get
(
i
);
array
[
ne
++]
=
o
.
expression
.
getValue
(
session
);
}
...
...
@@ -395,7 +398,6 @@ public abstract class AbstractAggregate extends Expression {
@SuppressWarnings
(
"unchecked"
)
ArrayList
<
Value
[]>
data
=
(
ArrayList
<
Value
[]>)
getData
(
session
,
groupData
,
false
,
true
);
data
.
add
(
array
);
return
;
}
private
Value
getOrderedResult
(
Session
session
,
SelectGroups
groupData
,
PartitionData
partition
,
Object
data
)
{
...
...
@@ -404,9 +406,12 @@ public abstract class AbstractAggregate extends Expression {
result
=
new
HashMap
<>();
@SuppressWarnings
(
"unchecked"
)
ArrayList
<
Value
[]>
orderedData
=
(
ArrayList
<
Value
[]>)
data
;
int
ne
=
getNumExpressions
();
int
rowIdColumn
=
ne
+
over
.
getOrderBy
().
size
();
int
rowIdColumn
=
getNumExpressions
();
ArrayList
<
SelectOrderBy
>
orderBy
=
over
.
getOrderBy
();
if
(
orderBy
!=
null
)
{
rowIdColumn
+=
orderBy
.
size
();
Collections
.
sort
(
orderedData
,
overOrderBySort
);
}
getOrderedResultLoop
(
session
,
result
,
orderedData
,
rowIdColumn
);
partition
.
setOrderedResult
(
result
);
}
...
...
@@ -426,7 +431,7 @@ public abstract class AbstractAggregate extends Expression {
protected
void
getOrderedResultLoop
(
Session
session
,
HashMap
<
Integer
,
Value
>
result
,
ArrayList
<
Value
[]>
ordered
,
int
rowIdColumn
)
{
WindowFrame
frame
=
over
.
getWindowFrame
();
if
(
frame
.
isDefault
())
{
if
(
frame
==
null
||
frame
.
isDefault
())
{
Object
aggregateData
=
createAggregateData
();
for
(
Value
[]
row
:
ordered
)
{
updateFromExpressions
(
session
,
aggregateData
,
row
);
...
...
h2/src/main/org/h2/expression/aggregate/Window.java
浏览文件 @
3b4620a2
...
...
@@ -64,11 +64,6 @@ public final class Window {
public
Window
(
ArrayList
<
Expression
>
partitionBy
,
ArrayList
<
SelectOrderBy
>
orderBy
,
WindowFrame
frame
)
{
this
.
partitionBy
=
partitionBy
;
this
.
orderBy
=
orderBy
;
if
(
frame
==
null
)
{
frame
=
new
WindowFrame
(
WindowFrameUnits
.
RANGE
,
new
WindowFrameBound
(
WindowFrameBoundType
.
UNBOUNDED_PRECEDING
,
null
),
null
,
WindowFrameExclusion
.
EXCLUDE_NO_OTHERS
);
}
this
.
frame
=
frame
;
}
...
...
@@ -146,9 +141,9 @@ public final class Window {
}
/**
* Returns window frame.
* Returns window frame
, or null
.
*
* @return window frame
* @return window frame
, or null
*/
public
WindowFrame
getWindowFrame
()
{
return
frame
;
...
...
@@ -182,7 +177,7 @@ public final class Window {
* @see Expression#getSQL()
*/
public
String
getSQL
()
{
if
(
partitionBy
==
null
&&
orderBy
==
null
)
{
if
(
partitionBy
==
null
&&
orderBy
==
null
&&
frame
==
null
)
{
return
"OVER ()"
;
}
StringBuilder
builder
=
new
StringBuilder
().
append
(
"OVER ("
);
...
...
@@ -196,8 +191,11 @@ public final class Window {
}
}
appendOrderBy
(
builder
,
orderBy
);
if
(!
frame
.
isDefault
())
{
builder
.
append
(
' '
).
append
(
frame
.
getSQL
());
if
(
frame
!=
null
&&
!
frame
.
isDefault
())
{
if
(
builder
.
charAt
(
builder
.
length
()
-
1
)
!=
'('
)
{
builder
.
append
(
' '
);
}
builder
.
append
(
frame
.
getSQL
());
}
return
builder
.
append
(
')'
).
toString
();
}
...
...
h2/src/main/org/h2/expression/aggregate/WindowFrame.java
浏览文件 @
3b4620a2
...
...
@@ -24,7 +24,7 @@ import org.h2.value.Value;
*/
public
final
class
WindowFrame
{
private
abstract
class
Itr
implements
Iterator
<
Value
[]>
{
private
static
abstract
class
Itr
implements
Iterator
<
Value
[]>
{
final
ArrayList
<
Value
[]>
orderedRows
;
...
...
@@ -39,7 +39,7 @@ public final class WindowFrame {
}
private
final
class
PlainItr
extends
Itr
{
private
static
final
class
PlainItr
extends
Itr
{
private
final
int
endIndex
;
...
...
@@ -66,7 +66,7 @@ public final class WindowFrame {
}
private
final
class
PlainReverseItr
extends
Itr
{
private
static
final
class
PlainReverseItr
extends
Itr
{
private
final
int
startIndex
;
...
...
@@ -93,7 +93,7 @@ public final class WindowFrame {
}
private
abstract
class
AbstractBitSetItr
extends
Itr
{
private
static
abstract
class
AbstractBitSetItr
extends
Itr
{
final
BitSet
set
;
...
...
@@ -111,7 +111,7 @@ public final class WindowFrame {
}
private
final
class
BitSetItr
extends
AbstractBitSetItr
{
private
static
final
class
BitSetItr
extends
AbstractBitSetItr
{
BitSetItr
(
ArrayList
<
Value
[]>
orderedRows
,
BitSet
set
)
{
super
(
orderedRows
,
set
);
...
...
@@ -130,7 +130,7 @@ public final class WindowFrame {
}
private
final
class
BitSetReverseItr
extends
AbstractBitSetItr
{
private
static
final
class
BitSetReverseItr
extends
AbstractBitSetItr
{
BitSetReverseItr
(
ArrayList
<
Value
[]>
orderedRows
,
BitSet
set
)
{
super
(
orderedRows
,
set
);
...
...
@@ -157,6 +157,31 @@ public final class WindowFrame {
private
final
WindowFrameExclusion
exclusion
;
/**
* Returns iterator for the specified frame, or default iterator if frame is
* null.
*
* @param frame
* window frame, or null
* @param session
* the session
* @param orderedRows
* ordered rows
* @param sortOrder
* sort order
* @param currentRow
* index of the current row
* @param reverse
* whether iterator should iterate in reverse order
*
* @return iterator
*/
public
static
Iterator
<
Value
[]>
iterator
(
WindowFrame
frame
,
Session
session
,
ArrayList
<
Value
[]>
orderedRows
,
SortOrder
sortOrder
,
int
currentRow
,
boolean
reverse
)
{
return
frame
!=
null
?
frame
.
iterator
(
session
,
orderedRows
,
sortOrder
,
currentRow
,
reverse
)
:
reverse
?
new
PlainReverseItr
(
orderedRows
,
0
,
currentRow
)
:
new
PlainItr
(
orderedRows
,
0
,
currentRow
);
}
private
static
int
toGroupStart
(
ArrayList
<
Value
[]>
orderedRows
,
SortOrder
sortOrder
,
int
offset
,
int
minOffset
)
{
Value
[]
row
=
orderedRows
.
get
(
offset
);
while
(
offset
>
minOffset
&&
sortOrder
.
compare
(
row
,
orderedRows
.
get
(
offset
-
1
))
==
0
)
{
...
...
h2/src/main/org/h2/expression/aggregate/WindowFunction.java
浏览文件 @
3b4620a2
...
...
@@ -10,6 +10,7 @@ import java.util.HashMap;
import
java.util.Iterator
;
import
org.h2.command.dml.Select
;
import
org.h2.command.dml.SelectOrderBy
;
import
org.h2.engine.Session
;
import
org.h2.expression.Expression
;
import
org.h2.message.DbException
;
...
...
@@ -358,10 +359,12 @@ public class WindowFunction extends AbstractAggregate {
Value
v
;
switch
(
type
)
{
case
FIRST_VALUE:
v
=
getNthValue
(
frame
.
iterator
(
session
,
ordered
,
getOverOrderBySort
(),
i
,
false
),
0
,
ignoreNulls
);
v
=
getNthValue
(
WindowFrame
.
iterator
(
frame
,
session
,
ordered
,
getOverOrderBySort
(),
i
,
false
),
0
,
ignoreNulls
);
break
;
case
LAST_VALUE:
v
=
getNthValue
(
frame
.
iterator
(
session
,
ordered
,
getOverOrderBySort
(),
i
,
true
),
0
,
ignoreNulls
);
v
=
getNthValue
(
WindowFrame
.
iterator
(
frame
,
session
,
ordered
,
getOverOrderBySort
(),
i
,
true
),
0
,
ignoreNulls
);
break
;
case
NTH_VALUE:
{
int
n
=
row
[
1
].
getInt
();
...
...
@@ -369,7 +372,8 @@ public class WindowFunction extends AbstractAggregate {
throw
DbException
.
getInvalidValueException
(
"nth row"
,
n
);
}
n
--;
Iterator
<
Value
[]>
iter
=
frame
.
iterator
(
session
,
ordered
,
getOverOrderBySort
(),
i
,
fromLast
);
Iterator
<
Value
[]>
iter
=
WindowFrame
.
iterator
(
frame
,
session
,
ordered
,
getOverOrderBySort
(),
i
,
fromLast
);
v
=
getNthValue
(
iter
,
n
,
ignoreNulls
);
break
;
}
...
...
@@ -397,6 +401,30 @@ public class WindowFunction extends AbstractAggregate {
@Override
public
Expression
optimize
(
Session
session
)
{
if
(
over
.
getWindowFrame
()
!=
null
)
{
switch
(
type
)
{
case
FIRST_VALUE:
case
LAST_VALUE:
case
NTH_VALUE:
break
;
default
:
String
sql
=
getSQL
();
throw
DbException
.
getSyntaxError
(
sql
,
sql
.
length
()
-
1
);
}
}
ArrayList
<
SelectOrderBy
>
orderBy
=
over
.
getOrderBy
();
if
(
orderBy
==
null
||
orderBy
.
isEmpty
())
{
switch
(
type
)
{
case
RANK:
case
DENSE_RANK:
case
NTILE:
case
LEAD:
case
LAG:
String
sql
=
getSQL
();
throw
DbException
.
getSyntaxError
(
sql
,
sql
.
length
()
-
1
,
"ORDER BY"
);
default
:
}
}
super
.
optimize
(
session
);
if
(
args
!=
null
)
{
for
(
int
i
=
0
;
i
<
args
.
length
;
i
++)
{
...
...
h2/src/test/org/h2/test/scripts/functions/window/lead.sql
浏览文件 @
3b4620a2
...
...
@@ -129,5 +129,17 @@ SELECT LEAD(VALUE, -1) OVER (ORDER BY ID) FROM TEST;
SELECT
LAG
(
VALUE
,
-
1
)
OVER
(
ORDER
BY
ID
)
FROM
TEST
;
>
exception
INVALID_VALUE_2
SELECT
LEAD
(
VALUE
)
OVER
()
FROM
TEST
;
>
exception
SYNTAX_ERROR_2
SELECT
LAG
(
VALUE
)
OVER
()
FROM
TEST
;
>
exception
SYNTAX_ERROR_2
SELECT
LEAD
(
VALUE
)
OVER
(
ORDER
BY
ID
RANGE
CURRENT
ROW
)
FROM
TEST
;
>
exception
SYNTAX_ERROR_1
SELECT
LAG
(
VALUE
)
OVER
(
ORDER
BY
ID
RANGE
CURRENT
ROW
)
FROM
TEST
;
>
exception
SYNTAX_ERROR_1
DROP
TABLE
TEST
;
>
ok
h2/src/test/org/h2/test/scripts/functions/window/ntile.sql
浏览文件 @
3b4620a2
...
...
@@ -113,3 +113,8 @@ SELECT NTILE(X) OVER (ORDER BY X) FROM (SELECT * FROM SYSTEM_RANGE(1, 6));
>
6
>
rows
(
ordered
):
6
SELECT
NTILE
(
X
)
OVER
()
FROM
(
SELECT
*
FROM
SYSTEM_RANGE
(
1
,
1
));
>
exception
SYNTAX_ERROR_2
SELECT
NTILE
(
X
)
OVER
(
ORDER
BY
X
RANGE
CURRENT
ROW
)
FROM
(
SELECT
*
FROM
SYSTEM_RANGE
(
1
,
1
));
>
exception
SYNTAX_ERROR_1
h2/src/test/org/h2/test/scripts/functions/window/row_number.sql
浏览文件 @
3b4620a2
...
...
@@ -20,8 +20,6 @@ INSERT INTO TEST VALUES
SELECT
*
,
ROW_NUMBER
()
OVER
()
RN
,
RANK
()
OVER
()
RK
,
DENSE_RANK
()
OVER
()
DR
,
ROUND
(
PERCENT_RANK
()
OVER
(),
2
)
PR
,
ROUND
(
CUME_DIST
()
OVER
(),
2
)
CD
,
...
...
@@ -32,17 +30,17 @@ SELECT *,
ROUND
(
CUME_DIST
()
OVER
(
ORDER
BY
ID
),
2
)
CDO
FROM
TEST
;
>
ID
CATEGORY
VALUE
RN
RK
DR
PR
CD
RNO
RKO
DRO
PRO
CDO
>
-- -------- ----- -- --
-- --
- --- --- --- --- ---- ----
>
1
1
11
1
1
1
0
.
0
1
.
0
1
1
1
0
.
0
0
.
11
>
2
1
12
2
1
1
0
.
0
1
.
0
2
2
2
0
.
13
0
.
22
>
3
1
13
3
1
1
0
.
0
1
.
0
3
3
3
0
.
25
0
.
33
>
4
2
21
4
1
1
0
.
0
1
.
0
4
4
4
0
.
38
0
.
44
>
5
2
22
5
1
1
0
.
0
1
.
0
5
5
5
0
.
5
0
.
56
>
6
3
31
6
1
1
0
.
0
1
.
0
6
6
6
0
.
63
0
.
67
>
7
3
32
7
1
1
0
.
0
1
.
0
7
7
7
0
.
75
0
.
78
>
8
3
33
8
1
1
0
.
0
1
.
0
8
8
8
0
.
88
0
.
89
>
9
4
41
9
1
1
0
.
0
1
.
0
9
9
9
1
.
0
1
.
0
>
ID
CATEGORY
VALUE
RN
PR
CD
RNO
RKO
DRO
PRO
CDO
>
-- -------- ----- -- --- --- --- --- --- ---- ----
>
1
1
11
1
0
.
0
1
.
0
1
1
1
0
.
0
0
.
11
>
2
1
12
2
0
.
0
1
.
0
2
2
2
0
.
13
0
.
22
>
3
1
13
3
0
.
0
1
.
0
3
3
3
0
.
25
0
.
33
>
4
2
21
4
0
.
0
1
.
0
4
4
4
0
.
38
0
.
44
>
5
2
22
5
0
.
0
1
.
0
5
5
5
0
.
5
0
.
56
>
6
3
31
6
0
.
0
1
.
0
6
6
6
0
.
63
0
.
67
>
7
3
32
7
0
.
0
1
.
0
7
7
7
0
.
75
0
.
78
>
8
3
33
8
0
.
0
1
.
0
8
8
8
0
.
88
0
.
89
>
9
4
41
9
0
.
0
1
.
0
9
9
9
1
.
0
1
.
0
>
rows
(
ordered
):
9
SELECT
*
,
...
...
@@ -86,19 +84,41 @@ SELECT *,
>
rows
(
ordered
):
9
SELECT
ROW_NUMBER
()
OVER
()
RN
,
RANK
()
OVER
()
RK
,
DENSE_RANK
()
OVER
()
DR
,
ROW_NUMBER
()
OVER
(
ORDER
BY
CATEGORY
)
RN
,
RANK
()
OVER
(
ORDER
BY
CATEGORY
)
RK
,
DENSE_RANK
()
OVER
(
ORDER
BY
CATEGORY
)
DR
,
PERCENT_RANK
()
OVER
()
PR
,
CUME_DIST
()
OVER
()
CD
FROM
TEST
GROUP
BY
CATEGORY
;
>
RN
RK
DR
PR
CD
>
-- -- -- --- ---
>
1
1
1
0
.
0
1
.
0
>
2
1
1
0
.
0
1
.
0
>
3
1
1
0
.
0
1
.
0
>
4
1
1
0
.
0
1
.
0
>
rows
:
4
CUME_DIST
()
OVER
()
CD
,
CATEGORY
C
FROM
TEST
GROUP
BY
CATEGORY
ORDER
BY
RN
;
>
RN
RK
DR
PR
CD
C
>
-- -- -- --- --- -
>
1
1
1
0
.
0
1
.
0
1
>
2
2
2
0
.
0
1
.
0
2
>
3
3
3
0
.
0
1
.
0
3
>
4
4
4
0
.
0
1
.
0
4
>
rows
(
ordered
):
4
SELECT
RANK
()
OVER
()
FROM
TEST
;
>
exception
SYNTAX_ERROR_2
SELECT
DENSE_RANK
()
OVER
()
FROM
TEST
;
>
exception
SYNTAX_ERROR_2
SELECT
ROW_NUMBER
()
OVER
(
ORDER
BY
ID
RANGE
CURRENT
ROW
)
FROM
TEST
;
>
exception
SYNTAX_ERROR_1
SELECT
RANK
()
OVER
(
ORDER
BY
ID
RANGE
CURRENT
ROW
)
FROM
TEST
;
>
exception
SYNTAX_ERROR_1
SELECT
DENSE_RANK
()
OVER
(
ORDER
BY
ID
RANGE
CURRENT
ROW
)
FROM
TEST
;
>
exception
SYNTAX_ERROR_1
SELECT
PERCENT_RANK
()
OVER
(
ORDER
BY
ID
RANGE
CURRENT
ROW
)
FROM
TEST
;
>
exception
SYNTAX_ERROR_1
SELECT
CUME_DIST
()
OVER
(
ORDER
BY
ID
RANGE
CURRENT
ROW
)
FROM
TEST
;
>
exception
SYNTAX_ERROR_1
DROP
TABLE
TEST
;
>
ok
...
...
@@ -121,5 +141,11 @@ SELECT ROW_NUMBER() OVER(ORDER /**/ BY TYPE) RN, TYPE, SUM(CNT) SUM FROM TEST GR
>
3
c
4
>
rows
:
3
SELECT
RANK
()
OVER
()
FROM
TEST
;
>
exception
SYNTAX_ERROR_2
SELECT
DENSE_RANK
()
OVER
()
FROM
TEST
;
>
exception
SYNTAX_ERROR_2
DROP
TABLE
TEST
;
>
ok
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