/**
* Internal method to create a call to a literal. Code outside this package should call one of the
* type-specific methods such as {@link #makeDateLiteral(Calendar)}, {@link
* #makeLiteral(boolean)}, {@link #makeLiteral(String)}.
*
* @param o Value of literal, must be appropriate for the type
* @param type Type of literal
* @param typeName SQL type of literal
* @return Literal
*/
protected RexLiteral makeLiteral(Comparable o, RelDataType type, SqlTypeName typeName) {
// All literals except NULL have NOT NULL types.
type = typeFactory.createTypeWithNullability(type, o == null);
if (typeName == SqlTypeName.CHAR) {
// Character literals must have a charset and collation. Populate
// from the type if necessary.
assert o instanceof NlsString;
NlsString nlsString = (NlsString) o;
if ((nlsString.getCollation() == null) || (nlsString.getCharset() == null)) {
assert type.getSqlTypeName() == SqlTypeName.CHAR;
assert type.getCharset().name() != null;
assert type.getCollation() != null;
o = new NlsString(nlsString.getValue(), type.getCharset().name(), type.getCollation());
}
}
return new RexLiteral(o, type, typeName);
}
/**
* Converts the type of a value to comply with {@link
* org.apache.calcite.rex.RexLiteral#valueMatchesType}.
*/
private static Object clean(Object o, RelDataType type) {
if (o == null) {
return null;
}
final Calendar calendar;
switch (type.getSqlTypeName()) {
case TINYINT:
case SMALLINT:
case INTEGER:
case BIGINT:
case DECIMAL:
case INTERVAL_YEAR_MONTH:
case INTERVAL_DAY_TIME:
if (o instanceof BigDecimal) {
return o;
}
return new BigDecimal(((Number) o).longValue());
case FLOAT:
case REAL:
case DOUBLE:
if (o instanceof BigDecimal) {
return o;
}
return new BigDecimal(((Number) o).doubleValue());
case CHAR:
case VARCHAR:
if (o instanceof NlsString) {
return o;
}
return new NlsString((String) o, type.getCharset().name(), type.getCollation());
case TIME:
if (o instanceof Calendar) {
return o;
}
calendar = Calendar.getInstance(DateTimeUtils.GMT_ZONE);
calendar.setTimeInMillis((Integer) o);
return calendar;
case DATE:
if (o instanceof Calendar) {
return o;
}
calendar = Calendar.getInstance(DateTimeUtils.GMT_ZONE);
calendar.setTimeInMillis(0);
calendar.add(Calendar.DAY_OF_YEAR, (Integer) o);
return calendar;
case TIMESTAMP:
if (o instanceof Calendar) {
return o;
}
calendar = Calendar.getInstance(DateTimeUtils.GMT_ZONE);
calendar.setTimeInMillis((Long) o);
return calendar;
default:
return o;
}
}
public static void checkCharsetAndCollateConsistentIfCharType(RelDataType type) {
// (every charset must have a default collation)
if (SqlTypeUtil.inCharFamily(type)) {
Charset strCharset = type.getCharset();
Charset colCharset = type.getCollation().getCharset();
assert null != strCharset;
assert null != colCharset;
if (!strCharset.equals(colCharset)) {
if (false) {
// todo: enable this checking when we have a charset to
// collation mapping
throw new Error(
type.toString()
+ " was found to have charset '"
+ strCharset.name()
+ "' and a mismatched collation charset '"
+ colCharset.name()
+ "'");
}
}
}
}