提交 c7e9dcc9 authored 作者: Thomas Mueller's avatar Thomas Mueller

--no commit message

--no commit message
上级 07236a50
......@@ -371,6 +371,7 @@ Roadmap
</li><li>Support large databases: split LOB (BLOB, CLOB) to multiple directories / disks (similar to tablespaces).
</li><li>Support to assign a primary key index a user defined name.
</li><li>Cluster: Add feature to make sure cluster nodes can not get out of sync (for example by stopping one process).
</li><lil>H2 Console: support configuration option for fixed width (monospace) font.
</li></ul>
<h2>Not Planned</h2>
......
......@@ -14,22 +14,33 @@ import org.hibernate.util.ReflectHelper;
/**
* A dialect compatible with the H2 database.
*
*
* @author Thomas Mueller
*
*/
public class H2Dialect extends Dialect {
private String querySequenceString;
public H2Dialect() {
super();
querySequenceString = "select sequence_name from information_schema.sequences";
try {
// HHH-2300
Class constants = ReflectHelper.classForName( "org.h2.engine.Constants" );
Integer build = (Integer)constants.getDeclaredField("BUILD_ID" ).get(null);
int buildid = build.intValue();
if(buildid < 32) {
querySequenceString = "select name from information_schema.sequences";
}
} catch(Throwable e) {
// ignore (probably H2 not in the classpath)
}
registerColumnType(Types.BOOLEAN, "boolean");
registerColumnType(Types.BIGINT, "bigint");
registerColumnType(Types.BINARY, "binary");
registerColumnType(Types.BIT, "boolean");
registerColumnType(Types.CHAR, "varchar($l)");
registerColumnType(Types.CHAR, "char($l)");
registerColumnType(Types.DATE, "date");
registerColumnType(Types.DECIMAL, "decimal($p,$s)");
registerColumnType(Types.DOUBLE, "double");
......@@ -37,7 +48,7 @@ public class H2Dialect extends Dialect {
registerColumnType(Types.INTEGER, "integer");
registerColumnType(Types.LONGVARBINARY, "longvarbinary");
registerColumnType(Types.LONGVARCHAR, "longvarchar");
registerColumnType(Types.REAL, "real");
registerColumnType(Types.REAL, "real");
registerColumnType(Types.SMALLINT, "smallint");
registerColumnType(Types.TINYINT, "tinyint");
registerColumnType(Types.TIME, "time");
......@@ -47,7 +58,7 @@ public class H2Dialect extends Dialect {
registerColumnType(Types.NUMERIC, "numeric");
registerColumnType(Types.BLOB, "blob");
registerColumnType(Types.CLOB, "clob");
// select topic, syntax from information_schema.help
// where section like 'Function%' order by section, topic
......@@ -121,7 +132,7 @@ public class H2Dialect extends Dialect {
registerFunction("current_date", new NoArgSQLFunction("current_date", Hibernate.DATE));
registerFunction("current_time", new NoArgSQLFunction("current_time", Hibernate.TIME));
registerFunction("current_timestamp", new NoArgSQLFunction("current_timestamp", Hibernate.TIMESTAMP));
registerFunction("datediff", new NoArgSQLFunction("datediff", Hibernate.INTEGER));
registerFunction("datediff", new StandardSQLFunction("datediff", Hibernate.INTEGER));
registerFunction("dayname", new StandardSQLFunction("dayname", Hibernate.STRING));
registerFunction("dayofmonth", new StandardSQLFunction("dayofmonth", Hibernate.INTEGER));
registerFunction("dayofweek", new StandardSQLFunction("dayofweek", Hibernate.INTEGER));
......@@ -185,10 +196,10 @@ public class H2Dialect extends Dialect {
append(hasOffset ? " limit ? offset ?" : " limit ?").
toString();
}
public boolean bindLimitParametersInReverseOrder() {
return true;
}
}
public boolean bindLimitParametersFirst() {
return false;
......@@ -198,16 +209,20 @@ public class H2Dialect extends Dialect {
return true;
}
public String[] getCreateSequenceStrings(String sequenceName) {
return new String[] {
"create sequence " + sequenceName
};
public boolean supportsSequences() {
return true;
}
public boolean supportsPooledSequences() {
return true;
}
public String getCreateSequenceString(String sequenceName) {
return "create sequence " + sequenceName;
}
public String[] getDropSequenceStrings(String sequenceName) {
return new String[] {
"drop sequence " + sequenceName
};
public String getDropSequenceString(String sequenceName) {
return "drop sequence " + sequenceName;
}
public String getSelectSequenceNextValString(String sequenceName) {
......@@ -222,11 +237,7 @@ public class H2Dialect extends Dialect {
return querySequenceString;
}
public boolean supportsSequences() {
return true;
}
public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() {
public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() {
return EXTRACTER;
}
......@@ -235,15 +246,15 @@ public class H2Dialect extends Dialect {
/**
* Extract the name of the violated constraint from the given SQLException.
*
* @param e The exception that was the result of the constraint violation.
* @param sqle The exception that was the result of the constraint violation.
* @return The extracted constraint name.
*/
public String extractConstraintName(SQLException e) {
public String extractConstraintName(SQLException sqle) {
String constraintName = null;
// 23000: Check constraint violation: {0}
// 23001: Unique index or primary key violation: {0}
if(e.getSQLState().startsWith("23")) {
String message = e.getMessage();
if(sqle.getSQLState().startsWith("23")) {
String message = sqle.getMessage();
int idx = message.indexOf("violation: ");
if(idx > 0) {
constraintName = message.substring(idx + "violation: ".length());
......@@ -257,7 +268,7 @@ public class H2Dialect extends Dialect {
public boolean supportsTemporaryTables() {
return true;
}
public String getCreateTemporaryTableString() {
return "create temporary table if not exists";
}
......@@ -265,17 +276,23 @@ public class H2Dialect extends Dialect {
public boolean supportsCurrentTimestampSelection() {
return true;
}
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
public String getCurrentTimestampSelectString() {
return "call current_timestamp()";
}
}
public boolean supportsUnionAll() {
return true;
}
}
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsLobValueChangePropogation() {
return false;
}
}
\ No newline at end of file
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