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h2database
Commits
db1612f4
提交
db1612f4
authored
2月 26, 2018
作者:
Evgenij Ryazanov
浏览文件
操作
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电子邮件补丁
差异文件
Implement derived column list syntax on table alias
上级
d4891863
隐藏空白字符变更
内嵌
并排
正在显示
10 个修改的文件
包含
127 行增加
和
4 行删除
+127
-4
help.csv
h2/src/docsrc/help/help.csv
+2
-1
Parser.java
h2/src/main/org/h2/command/Parser.java
+8
-0
Select.java
h2/src/main/org/h2/command/dml/Select.java
+2
-1
SelectListColumnResolver.java
h2/src/main/org/h2/command/dml/SelectListColumnResolver.java
+5
-0
ExpressionColumn.java
h2/src/main/org/h2/expression/ExpressionColumn.java
+11
-2
ColumnResolver.java
h2/src/main/org/h2/table/ColumnResolver.java
+8
-0
SingleColumnResolver.java
h2/src/main/org/h2/table/SingleColumnResolver.java
+5
-0
TableFilter.java
h2/src/main/org/h2/table/TableFilter.java
+33
-0
TestScript.java
h2/src/test/org/h2/test/scripts/TestScript.java
+1
-0
aliases.sql
h2/src/test/org/h2/test/scripts/aliases.sql
+52
-0
没有找到文件。
h2/src/docsrc/help/help.csv
浏览文件 @
db1612f4
...
@@ -2256,7 +2256,8 @@ ID + 20
...
@@ -2256,7 +2256,8 @@ ID + 20
"
"
"Other Grammar","Table Expression","
"Other Grammar","Table Expression","
{ [ schemaName. ] tableName | ( select ) | valuesExpression } [ [ AS ] newTableAlias ]
{ [ schemaName. ] tableName | ( select ) | valuesExpression }
[ [ AS ] newTableAlias [ ( columnName [,...] ) ] ]
[ USE INDEX ([ indexName [,...] ]) ]
[ USE INDEX ([ indexName [,...] ]) ]
[ { { LEFT | RIGHT } [ OUTER ] | [ INNER ] | CROSS | NATURAL }
[ { { LEFT | RIGHT } [ OUTER ] | [ INNER ] | CROSS | NATURAL }
JOIN tableExpression [ ON expression ] ]
JOIN tableExpression [ ON expression ] ]
...
...
h2/src/main/org/h2/command/Parser.java
浏览文件 @
db1612f4
...
@@ -1374,6 +1374,14 @@ public class Parser {
...
@@ -1374,6 +1374,14 @@ public class Parser {
alias
=
readFromAlias
(
null
);
alias
=
readFromAlias
(
null
);
if
(
alias
!=
null
)
{
if
(
alias
!=
null
)
{
top
.
setAlias
(
alias
);
top
.
setAlias
(
alias
);
if
(
readIf
(
"("
))
{
ArrayList
<
String
>
derivedColumnNames
=
New
.
arrayList
();
do
{
derivedColumnNames
.
add
(
readAliasIdentifier
());
}
while
(
readIf
(
","
));
read
(
")"
);
top
.
setDerivedColumns
(
derivedColumnNames
);
}
}
}
return
top
;
return
top
;
}
}
...
...
h2/src/main/org/h2/command/dml/Select.java
浏览文件 @
db1612f4
...
@@ -737,8 +737,9 @@ public class Select extends Query {
...
@@ -737,8 +737,9 @@ public class Select extends Query {
if
(
filter
.
isNaturalJoinColumn
(
c
))
{
if
(
filter
.
isNaturalJoinColumn
(
c
))
{
continue
;
continue
;
}
}
String
name
=
filter
.
getDerivedColumnName
(
c
);
ExpressionColumn
ec
=
new
ExpressionColumn
(
ExpressionColumn
ec
=
new
ExpressionColumn
(
session
.
getDatabase
(),
null
,
alias
,
c
.
getName
());
session
.
getDatabase
(),
null
,
alias
,
name
!=
null
?
name
:
c
.
getName
());
expressions
.
add
(
index
++,
ec
);
expressions
.
add
(
index
++,
ec
);
}
}
return
index
;
return
index
;
...
...
h2/src/main/org/h2/command/dml/SelectListColumnResolver.java
浏览文件 @
db1612f4
...
@@ -52,6 +52,11 @@ public class SelectListColumnResolver implements ColumnResolver {
...
@@ -52,6 +52,11 @@ public class SelectListColumnResolver implements ColumnResolver {
return
columns
;
return
columns
;
}
}
@Override
public
String
getDerivedColumnName
(
Column
column
)
{
return
null
;
}
@Override
@Override
public
String
getSchemaName
()
{
public
String
getSchemaName
()
{
return
null
;
return
null
;
...
...
h2/src/main/org/h2/expression/ExpressionColumn.java
浏览文件 @
db1612f4
...
@@ -33,7 +33,7 @@ public class ExpressionColumn extends Expression {
...
@@ -33,7 +33,7 @@ public class ExpressionColumn extends Expression {
private
final
Database
database
;
private
final
Database
database
;
private
final
String
schemaName
;
private
final
String
schemaName
;
private
final
String
tableAlias
;
private
final
String
tableAlias
;
private
final
String
columnName
;
private
String
columnName
;
private
ColumnResolver
columnResolver
;
private
ColumnResolver
columnResolver
;
private
int
queryLevel
;
private
int
queryLevel
;
private
Column
column
;
private
Column
column
;
...
@@ -89,7 +89,10 @@ public class ExpressionColumn extends Expression {
...
@@ -89,7 +89,10 @@ public class ExpressionColumn extends Expression {
return
;
return
;
}
}
for
(
Column
col
:
resolver
.
getColumns
())
{
for
(
Column
col
:
resolver
.
getColumns
())
{
String
n
=
col
.
getName
();
String
n
=
resolver
.
getDerivedColumnName
(
col
);
if
(
n
==
null
)
{
n
=
col
.
getName
();
}
if
(
database
.
equalsIdentifiers
(
columnName
,
n
))
{
if
(
database
.
equalsIdentifiers
(
columnName
,
n
))
{
mapColumn
(
resolver
,
col
,
level
);
mapColumn
(
resolver
,
col
,
level
);
return
;
return
;
...
@@ -253,6 +256,12 @@ public class ExpressionColumn extends Expression {
...
@@ -253,6 +256,12 @@ public class ExpressionColumn extends Expression {
@Override
@Override
public
String
getAlias
()
{
public
String
getAlias
()
{
if
(
column
!=
null
)
{
if
(
column
!=
null
)
{
if
(
columnResolver
!=
null
)
{
String
name
=
columnResolver
.
getDerivedColumnName
(
column
);
if
(
name
!=
null
)
{
return
name
;
}
}
return
column
.
getName
();
return
column
.
getName
();
}
}
if
(
tableAlias
!=
null
)
{
if
(
tableAlias
!=
null
)
{
...
...
h2/src/main/org/h2/table/ColumnResolver.java
浏览文件 @
db1612f4
...
@@ -30,6 +30,14 @@ public interface ColumnResolver {
...
@@ -30,6 +30,14 @@ public interface ColumnResolver {
*/
*/
Column
[]
getColumns
();
Column
[]
getColumns
();
/**
* Get derived column name, or {@code null}.
*
* @param column column
* @return derived column name, or {@code null}
*/
String
getDerivedColumnName
(
Column
column
);
/**
/**
* Get the list of system columns, if any.
* Get the list of system columns, if any.
*
*
...
...
h2/src/main/org/h2/table/SingleColumnResolver.java
浏览文件 @
db1612f4
...
@@ -42,6 +42,11 @@ public class SingleColumnResolver implements ColumnResolver {
...
@@ -42,6 +42,11 @@ public class SingleColumnResolver implements ColumnResolver {
return
new
Column
[]
{
column
};
return
new
Column
[]
{
column
};
}
}
@Override
public
String
getDerivedColumnName
(
Column
column
)
{
return
null
;
}
@Override
@Override
public
String
getSchemaName
()
{
public
String
getSchemaName
()
{
return
null
;
return
null
;
...
...
h2/src/main/org/h2/table/TableFilter.java
浏览文件 @
db1612f4
...
@@ -6,6 +6,7 @@
...
@@ -6,6 +6,7 @@
package
org
.
h2
.
table
;
package
org
.
h2
.
table
;
import
java.util.ArrayList
;
import
java.util.ArrayList
;
import
java.util.HashMap
;
import
java.util.HashSet
;
import
java.util.HashSet
;
import
org.h2.api.ErrorCode
;
import
org.h2.api.ErrorCode
;
import
org.h2.command.Parser
;
import
org.h2.command.Parser
;
...
@@ -117,6 +118,8 @@ public class TableFilter implements ColumnResolver {
...
@@ -117,6 +118,8 @@ public class TableFilter implements ColumnResolver {
private
final
int
hashCode
;
private
final
int
hashCode
;
private
final
int
orderInFrom
;
private
final
int
orderInFrom
;
private
HashMap
<
Column
,
String
>
derivedColumnMap
;
/**
/**
* Create a new table filter object.
* Create a new table filter object.
*
*
...
@@ -992,6 +995,12 @@ public class TableFilter implements ColumnResolver {
...
@@ -992,6 +995,12 @@ public class TableFilter implements ColumnResolver {
return
table
.
getColumns
();
return
table
.
getColumns
();
}
}
@Override
public
String
getDerivedColumnName
(
Column
column
)
{
HashMap
<
Column
,
String
>
map
=
derivedColumnMap
;
return
map
!=
null
?
map
.
get
(
column
)
:
null
;
}
/**
/**
* Get the system columns that this table understands. This is used for
* Get the system columns that this table understands. This is used for
* compatibility with other databases. The columns are only returned if the
* compatibility with other databases. The columns are only returned if the
...
@@ -1056,6 +1065,30 @@ public class TableFilter implements ColumnResolver {
...
@@ -1056,6 +1065,30 @@ public class TableFilter implements ColumnResolver {
this
.
alias
=
alias
;
this
.
alias
=
alias
;
}
}
/**
* Set derived column list.
*
* @param derivedColumnNames names of derived columns
*/
public
void
setDerivedColumns
(
ArrayList
<
String
>
derivedColumnNames
)
{
Column
[]
columns
=
getColumns
();
int
count
=
columns
.
length
;
if
(
count
!=
derivedColumnNames
.
size
())
{
throw
DbException
.
get
(
ErrorCode
.
COLUMN_COUNT_DOES_NOT_MATCH
);
}
HashMap
<
Column
,
String
>
map
=
new
HashMap
<>(
count
);
for
(
int
i
=
0
;
i
<
count
;
i
++)
{
String
alias
=
derivedColumnNames
.
get
(
i
);
for
(
int
j
=
0
;
j
<
i
;
j
++)
{
if
(
alias
.
equals
(
derivedColumnNames
.
get
(
j
)))
{
throw
DbException
.
get
(
ErrorCode
.
DUPLICATE_COLUMN_NAME_1
,
alias
);
}
}
map
.
put
(
columns
[
i
],
alias
);
}
this
.
derivedColumnMap
=
map
;
}
@Override
@Override
public
Expression
optimize
(
ExpressionColumn
expressionColumn
,
Column
column
)
{
public
Expression
optimize
(
ExpressionColumn
expressionColumn
,
Column
column
)
{
return
expressionColumn
;
return
expressionColumn
;
...
...
h2/src/test/org/h2/test/scripts/TestScript.java
浏览文件 @
db1612f4
...
@@ -82,6 +82,7 @@ public class TestScript extends TestBase {
...
@@ -82,6 +82,7 @@ public class TestScript extends TestBase {
reconnectOften
=
!
config
.
memory
&&
config
.
big
;
reconnectOften
=
!
config
.
memory
&&
config
.
big
;
testScript
(
"testScript.sql"
);
testScript
(
"testScript.sql"
);
testScript
(
"aliases.sql"
);
testScript
(
"joins.sql"
);
testScript
(
"joins.sql"
);
testScript
(
"altertable-index-reuse.sql"
);
testScript
(
"altertable-index-reuse.sql"
);
testScript
(
"query-optimisations.sql"
);
testScript
(
"query-optimisations.sql"
);
...
...
h2/src/test/org/h2/test/scripts/aliases.sql
0 → 100644
浏览文件 @
db1612f4
-- Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0,
-- and the EPL 1.0 (http://h2database.com/html/license.html).
-- Initial Developer: H2 Group
--
SELECT
*
FROM
(
VALUES
(
1
,
2
));
>
C1
C2
>
-- --
>
1
2
>
rows
:
1
SELECT
*
FROM
(
VALUES
(
1
,
2
))
AS
T
;
>
C1
C2
>
-- --
>
1
2
>
rows
:
1
SELECT
*
FROM
(
VALUES
(
1
,
2
))
AS
T
(
A
,
B
);
>
A
B
>
-
-
>
1
2
>
rows
:
1
SELECT
A
AS
A1
,
B
AS
B1
FROM
(
VALUES
(
1
,
2
))
AS
T
(
A
,
B
);
>
A1
B1
>
-- --
>
1
2
>
rows
:
1
SELECT
A
AS
A1
,
B
AS
B1
FROM
(
VALUES
(
1
,
2
))
AS
T
(
A
,
B
)
WHERE
A
<>
B
;
>
A1
B1
>
-- --
>
1
2
>
rows
:
1
SELECT
A
AS
A1
,
B
AS
B1
FROM
(
VALUES
(
1
,
2
))
AS
T
(
A
,
B
)
WHERE
A1
<>
B1
;
>
exception
SELECT
*
FROM
(
VALUES
(
1
,
2
))
AS
T
(
A
);
>
exception
SELECT
*
FROM
(
VALUES
(
1
,
2
))
AS
T
(
A
,
a
);
>
exception
SELECT
*
FROM
(
VALUES
(
1
,
2
))
AS
T
(
A
,
B
,
C
);
>
exception
SELECT
V
AS
V1
,
A
AS
A1
,
B
AS
B1
FROM
(
VALUES
(
1
))
T1
(
V
)
INNER
JOIN
(
VALUES
(
1
,
2
))
T2
(
A
,
B
)
ON
V
=
A
;
>
V1
A1
B1
>
-- -- --
>
1
1
2
>
rows
:
1
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