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package org.apache.openjpa.jdbc.sql;
import java.math.BigDecimal;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Arrays;
import java.util.Locale;
import org.apache.commons.lang.StringUtils;
import org.apache.openjpa.jdbc.kernel.exps.FilterValue;
import org.apache.openjpa.jdbc.schema.Column;
import org.apache.openjpa.jdbc.schema.PrimaryKey;
import org.apache.openjpa.jdbc.schema.Table;
import org.apache.openjpa.jdbc.schema.Unique;
import org.apache.openjpa.meta.JavaTypes;
public class H2Dictionary extends DBDictionary {
public H2Dictionary() {
platform = "H2";
validationSQL = "CALL 1";
closePoolSQL = "SHUTDOWN";
supportsAutoAssign = true;
lastGeneratedKeyQuery = "CALL IDENTITY()";
autoAssignClause = "IDENTITY";
autoAssignTypeName = "INTEGER";
nextSequenceQuery = "CALL NEXT VALUE FOR {0}";
// CROSS JOIN is currently not supported
crossJoinClause = "JOIN";
requiresConditionForCrossJoin = true;
stringLengthFunction = "LENGTH({0})";
trimLeadingFunction = "LTRIM({0})";
trimTrailingFunction = "RTRIM({0})";
trimBothFunction = "TRIM({0})";
useSchemaName = true;
supportsSelectForUpdate = true;
supportsSelectStartIndex = true;
supportsSelectEndIndex = true;
rangePosition = RANGE_POST_LOCK;
supportsDeferredConstraints = false;
blobTypeName = "BLOB";
doubleTypeName = "DOUBLE";
supportsNullTableForGetPrimaryKeys = true;
supportsNullTableForGetIndexInfo = true;
requiresCastForMathFunctions = false;
requiresCastForComparisons = false;
reservedWordSet.addAll(Arrays.asList(new String[] { "CURRENT_TIMESTAMP", "CURRENT_TIME", "CURRENT_DATE", "CROSS", "DISTINCT", "EXCEPT", "EXISTS", "FROM", "FOR", "FALSE",
"FULL", "GROUP", "HAVING", "INNER", "INTERSECT", "IS", "JOIN", "LIKE", "MINUS", "NATURAL", "NOT", "NULL", "ON", "ORDER", "PRIMARY", "ROWNUM", "SELECT", "SYSDATE",
"SYSTIME", "SYSTIMESTAMP", "TODAY", "TRUE", "UNION", "WHERE" }));
}
public int getJDBCType(int metaTypeCode, boolean lob) {
int type = super.getJDBCType(metaTypeCode, lob);
switch (type) {
case Types.BIGINT:
if (metaTypeCode == JavaTypes.BIGINTEGER)
return Types.NUMERIC;
break;
}
return type;
}
public int getPreferredType(int type) {
return super.getPreferredType(type);
}
public String[] getAddPrimaryKeySQL(PrimaryKey pk) {
return new String[0];
}
public String[] getDropPrimaryKeySQL(PrimaryKey pk) {
return new String[0];
}
public String[] getAddColumnSQL(Column column) {
return new String[] { "ALTER TABLE " + getFullName(column.getTable(), false) + " ADD COLUMN " + getDeclareColumnSQL(column, true) };
}
public String[] getCreateTableSQL(Table table) {
StringBuffer buf = new StringBuffer();
buf.append("CREATE TABLE ").append(getFullName(table, false)).append(" (");
Column[] cols = table.getColumns();
for (int i = 0; i < cols.length; i++) {
if (i > 0)
buf.append(", ");
buf.append(getDeclareColumnSQL(cols[i], false));
}
PrimaryKey pk = table.getPrimaryKey();
String pkStr;
if (pk != null) {
pkStr = getPrimaryKeyConstraintSQL(pk);
if (!StringUtils.isEmpty(pkStr))
buf.append(", ").append(pkStr);
}
Unique[] uniques = table.getUniques();
String uniqueStr;
for (int i = 0; i < uniques.length; i++) {
uniqueStr = getUniqueConstraintSQL(uniques[i]);
if (uniqueStr != null)
buf.append(", ").append(uniqueStr);
}
buf.append(")");
return new String[] { buf.toString() };
}
protected String getPrimaryKeyConstraintSQL(PrimaryKey pk) {
Column[] cols = pk.getColumns();
if (cols.length == 1 && cols[0].isAutoAssigned())
return null;
return super.getPrimaryKeyConstraintSQL(pk);
}
public boolean isSystemIndex(String name, Table table) {
return name.toUpperCase(Locale.ENGLISH).startsWith("SYSTEM_");
}
protected String getSequencesSQL(String schemaName, String sequenceName) {
StringBuffer buf = new StringBuffer();
buf.append("SELECT SEQUENCE_SCHEMA, SEQUENCE_NAME FROM ").append("INFORMATION_SCHEMA.SEQUENCES");
if (schemaName != null || sequenceName != null)
buf.append(" WHERE ");
if (schemaName != null) {
buf.append("SEQUENCE_SCHEMA = ?");
if (sequenceName != null)
buf.append(" AND ");
}
if (sequenceName != null)
buf.append("SEQUENCE_NAME = ?");
return buf.toString();
}
protected SQLBuffer toOperation(String op, SQLBuffer selects, SQLBuffer from, SQLBuffer where, SQLBuffer group, SQLBuffer having, SQLBuffer order, boolean distinct,
boolean forUpdate, long start, long end) {
return super.toOperation(op, selects, from, where, group, having, order, distinct, forUpdate, start, end);
}
public Column[] getColumns(DatabaseMetaData meta, String catalog, String schemaName, String tableName, String columnName, Connection conn) throws SQLException {
Column[] cols = super.getColumns(meta, catalog, schemaName, tableName, columnName, conn);
return cols;
}
public void setDouble(PreparedStatement stat, int idx, double val, Column col) throws SQLException {
super.setDouble(stat, idx, val, col);
}
public void setBigDecimal(PreparedStatement stat, int idx, BigDecimal val, Column col) throws SQLException {
super.setBigDecimal(stat, idx, val, col);
}
protected void appendSelectRange(SQLBuffer buf, long start, long end) {
if (end != Long.MAX_VALUE)
buf.append(" LIMIT ").appendValue(end - start);
if (start != 0)
buf.append(" OFFSET ").appendValue(start);
}
public void substring(SQLBuffer buf, FilterValue str, FilterValue start, FilterValue end) {
buf.append("SUBSTR(");
str.appendTo(buf);
buf.append(", (");
start.appendTo(buf);
buf.append(" + 1)");
if (end != null) {
buf.append(", (");
end.appendTo(buf);
buf.append(" - ");
start.appendTo(buf);
buf.append(")");
}
buf.append(")");
}
public void indexOf(SQLBuffer buf, FilterValue str, FilterValue find, FilterValue start) {
buf.append("(POSITION(");
find.appendTo(buf);
buf.append(" IN ");
if (start != null)
substring(buf, str, start, null);
else
str.appendTo(buf);
buf.append(") - 1");
if (start != null) {
buf.append(" + ");
start.appendTo(buf);
}
buf.append(")");
}
}