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h2database
提交 fde7c7b9 authored 作者: Owner's avatar Owner
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Merge branch 'master' of https://github.com/h2database/h2database into Issue#589

上级 6f0b2338 3e07806f
全部展开 隐藏空白字符变更
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正在显示 包含 409 行增加 和 51 行删除
h2/src/main/org/h2/command/Parser.java
浏览文件 @ fde7c7b9
......@@ -76,6 +76,7 @@ import org.h2.command.dml.ExecuteProcedure;
import org.h2.command.dml.Explain;
import org.h2.command.dml.Insert;
import org.h2.command.dml.Merge;
import org.h2.command.dml.MergeUsing;
import org.h2.command.dml.NoOperation;
import org.h2.command.dml.Query;
import org.h2.command.dml.Replace;
......@@ -845,6 +846,11 @@ public class Parser {
}
TableFilter filter = readSimpleTableFilter(0);
command.setTableFilter(filter);
parseDeleteGivenTable(command, limit, start);
return command;
}
private void parseDeleteGivenTable(Delete command, Expression limit, int start) {
if (readIf("WHERE")) {
Expression condition = readExpression();
command.setCondition(condition);
......@@ -854,7 +860,6 @@ public class Parser {
}
command.setLimit(limit);
setSQL(command, "DELETE", start);
return command;
}
private IndexColumn[] parseIndexColumnList() {
......@@ -1098,17 +1103,31 @@ public class Parser {
table_reference ::= table / view / sub-query
*/
/* TODO Finish coding*/
private Merge parseMergeUsing(Merge command) {
private MergeUsing parseMergeUsing(Merge oldCommand) {
MergeUsing command = new MergeUsing(oldCommand);
if (readIf("(")) {
if (isSelect()) {
command.setQuery(parseSelect());
read(")");
}
command.setQueryAlias(readFromAlias(null, Arrays.asList("ON")));
}
else{
List<String> excludeIdentifiers = Arrays.asList("ON");
TableFilter sourceTableFilter = readSimpleTableFilterWithAliasExcludes(0,excludeIdentifiers);
command.setSourceTableFilter(sourceTableFilter);
command.setSourceTableFilter(sourceTableFilter);
StringBuilder buff = new StringBuilder(
"SELECT * FROM "+sourceTableFilter.getTable().getName());
if(sourceTableFilter.getTableAlias()!=null){
buff.append(" AS "+sourceTableFilter.getTableAlias());
}
//ArrayList<Value> paramValues = New.arrayList();
Prepared preparedQuery = prepare(session, buff.toString(), null/*paramValues*/);
System.out.println("class="+preparedQuery.getClass());
command.setQuery((Select)preparedQuery);
}
read("ON");
read("(");
......@@ -1123,21 +1142,25 @@ public class Parser {
TableFilter filter = command.getTargetTableFilter();
updateCommand.setTableFilter(filter);
parseUpdateSetClause(updateCommand, filter);
command.setUpdateOrDeleteCommand(updateCommand);
command.setUpdateCommand(updateCommand);
}
if (readIf("DELETE")){
Delete deleteCommand = new Delete(session);
TableFilter filter = command.getTargetTableFilter();
deleteCommand.setTableFilter(filter);
command.setUpdateOrDeleteCommand(deleteCommand);
parseDeleteGivenTable(deleteCommand,null,lastParseIndex);
command.setDeleteCommand(deleteCommand);
}
}
if(readIf("WHEN")&&readIf("NOT")&&readIf("MATCHED")&&readIf("THEN")){
Insert insertCommand = new Insert(session);
insertCommand.setTable(command.getTargetTable());
parseInsertGivenTable(insertCommand,command.getTargetTable());
command.setInsertCommand(insertCommand);
if (readIf("INSERT")){
Insert insertCommand = new Insert(session);
insertCommand.setTable(command.getTargetTable());
parseInsertGivenTable(insertCommand,command.getTargetTable());
command.setInsertCommand(insertCommand);
}
}
return command;
......@@ -1380,6 +1403,10 @@ public class Parser {
}
}
}
// inherit alias for temporary views (usually CTE's) from table name
if(table.isView() && table.isTemporary() && alias==null){
alias = table.getName();
}
return new TableFilter(session, table, alias, rightsChecked,
currentSelect, orderInFrom++, indexHints);
}
......@@ -1401,18 +1428,21 @@ public class Parser {
return IndexHints.createUseIndexHints(indexNames);
}
private String readFromAlias(String alias) {
private String readFromAlias(String alias, List<String> excludeIdentifiers) {
if (readIf("AS")) {
alias = readAliasIdentifier();
} else if (currentTokenType == IDENTIFIER) {
// left and right are not keywords (because they are functions as
// well)
if (!isToken("LEFT") && !isToken("RIGHT") && !isToken("FULL")) {
} else if (currentTokenType == IDENTIFIER && !excludeIdentifiers.contains(currentToken)) {
alias = readAliasIdentifier();
}
}
return alias;
}
private String readFromAlias(String alias) {
// left and right are not keywords (because they are functions as
// well)
List<String> excludeIdentifiers = Arrays.asList("LEFT","RIGHT","FULL");;
return readFromAlias(alias, excludeIdentifiers);
}
private Prepared parseTruncate() {
read("TABLE");
......
h2/src/main/org/h2/command/Prepared.java
浏览文件 @ fde7c7b9
......@@ -454,4 +454,8 @@ public abstract class Prepared {
public void setCteCleanups(List<TableView> cteCleanups) {
this.cteCleanups = cteCleanups;
}
public Session getSession() {
return session;
}
}
h2/src/main/org/h2/command/dml/Merge.java
浏览文件 @ fde7c7b9
......@@ -33,17 +33,13 @@ import org.h2.value.Value;
*/
public class Merge extends Prepared {
private Table targetTable;
private TableFilter targetTableFilter;
private Column[] columns;
private Column[] keys;
private final ArrayList<Expression[]> valuesExpressionList = New.arrayList();
private Query query;
private Prepared update;
private TableFilter sourceTableFilter;
private ArrayList<Expression> conditions = new ArrayList<Expression>();
private Prepared updateOrDeleteCommand;
private Insert insertCommand;
protected Table targetTable;
protected TableFilter targetTableFilter;
protected Column[] columns;
protected Column[] keys;
protected final ArrayList<Expression[]> valuesExpressionList = New.arrayList();
protected Query query;
protected Prepared update;
public Merge(Session session) {
super(session);
......@@ -141,7 +137,7 @@ public class Merge extends Prepared {
return count;
}
private void merge(Row row) {
protected void merge(Row row) {
ArrayList<Parameter> k = update.getParameters();
for (int i = 0; i < columns.length; i++) {
Column col = columns[i];
......@@ -316,14 +312,6 @@ public class Merge extends Prepared {
return true;
}
public void setSourceTableFilter(TableFilter sourceTableFilter) {
this.sourceTableFilter = sourceTableFilter;
}
public void addCondition(Expression condition) {
this.conditions .add(condition);
}
public Table getTargetTable() {
return targetTable;
}
......@@ -337,20 +325,6 @@ public class Merge extends Prepared {
setTargetTable(targetTableFilter.getTable());
}
public Prepared getUpdateOrDeleteCommand() {
return updateOrDeleteCommand;
}
public void setUpdateOrDeleteCommand(Prepared updateOrDelete) {
this.updateOrDeleteCommand = updateOrDelete;
}
public Insert getInsertCommand() {
return insertCommand;
}
public void setInsertCommand(Insert insertCommand) {
this.insertCommand = insertCommand;
}
}
h2/src/main/org/h2/command/dml/MergeUsing.java 0 → 100755
浏览文件 @ fde7c7b9
差异被折叠。
h2/src/test/org/h2/test/db/TestGeneralCommonTableQueries.java
浏览文件 @ fde7c7b9
......@@ -40,6 +40,7 @@ public class TestGeneralCommonTableQueries extends TestBase {
testDelete();
testMerge();
testCreateTable();
testNestedSQL();
}
private void testSimpleSelect() throws Exception {
......@@ -388,4 +389,53 @@ public class TestGeneralCommonTableQueries extends TestBase {
conn.close();
deleteDb("commonTableExpressionQueries");
}
private void testNestedSQL() throws Exception {
deleteDb("commonTableExpressionQueries");
Connection conn = getConnection("commonTableExpressionQueries");
PreparedStatement prep;
ResultSet rs;
prep = conn.prepareStatement(
"WITH T1 AS ( "+
" SELECT * "+
" FROM TABLE ( "+
" K VARCHAR = ('a', 'b'), "+
" V INTEGER = (1, 2) "+
" ) "+
"), "+
" "+
" "+
"T2 AS ( "+
" SELECT * "+
" FROM TABLE ( "+
" K VARCHAR = ('a', 'b'), "+
" V INTEGER = (3, 4) "+
" ) "+
"), "+
" "+
" "+
"JOIN_CTE AS ( "+
" SELECT T1.* "+
" "+
" FROM "+
" T1 "+
" JOIN T2 ON ( "+
" T1.K = T2.K "+
" ) "+
") "+
" "+
"SELECT * FROM JOIN_CTE");
rs = prep.executeQuery();
for (String keyLetter : new String[] { "a", "b" }) {
assertTrue(rs.next());
assertContains("ab",rs.getString(1));
assertEquals(rs.getString(1),keyLetter);
assertTrue(rs.getInt(2)!=0);
}
conn.close();
deleteDb("commonTableExpressionQueries");
}
}
\ No newline at end of file
h2/src/test/org/h2/test/testScript.sql
浏览文件 @ fde7c7b9
......@@ -10333,8 +10333,8 @@ explain with recursive r(n) as (
)
select n from r;
> PLAN
> -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> WITH RECURSIVE R(N) AS ( (SELECT 1 FROM SYSTEM_RANGE(1, 1) /* PUBLIC.RANGE_INDEX */) UNION ALL (SELECT (N + 1) FROM PUBLIC.R /* PUBLIC.R.tableScan */ WHERE N < 3) ) SELECT N FROM R /* null */
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> WITH RECURSIVE R(N) AS ( (SELECT 1 FROM SYSTEM_RANGE(1, 1) /* PUBLIC.RANGE_INDEX */) UNION ALL (SELECT (N + 1) FROM PUBLIC.R /* PUBLIC.R.tableScan */ WHERE N < 3) ) SELECT N FROM R R /* null */
> rows: 1
select sum(n) from (
......
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