@Override
public Type getAggregateType(Type other) {
if (this == other) {
return this;
}
if (other.isCharacterType()) {
return other.getAggregateType(this);
}
switch (other.typeCode) {
case Types.SQL_ALL_TYPES:
return this;
case Types.SQL_REAL:
case Types.SQL_FLOAT:
case Types.SQL_DOUBLE:
case Types.SQL_NUMERIC:
case Types.SQL_DECIMAL:
case Types.TINYINT:
case Types.SQL_SMALLINT:
case Types.SQL_INTEGER:
case Types.SQL_BIGINT:
break;
default:
throw Error.error(ErrorCode.X_42562);
}
if (typeWidth == DOUBLE_WIDTH) {
return this;
}
if (((NumberType) other).typeWidth == DOUBLE_WIDTH) {
return other;
}
if (typeWidth <= BIGINT_WIDTH && ((NumberType) other).typeWidth <= BIGINT_WIDTH) {
return (typeWidth > ((NumberType) other).typeWidth) ? this : other;
}
int newScale = scale > other.scale ? scale : other.scale;
long newDigits =
precision - scale > other.precision - other.scale
? precision - scale
: other.precision - other.scale;
return getNumberType(Types.SQL_DECIMAL, newDigits + newScale, newScale);
}
@Override
public boolean canConvertFrom(Type otherType) {
if (otherType.typeCode == Types.SQL_ALL_TYPES) {
return true;
}
if (otherType.isNumberType()) {
return true;
}
if (otherType.isIntervalType()) {
return true;
}
if (otherType.isCharacterType()) {
return true;
}
return false;
}
public Type getAggregateType(Type other) {
if (typeCode == other.typeCode) {
return precision >= other.precision ? this : other;
}
if (other.isCharacterType()) {
return other.getAggregateType(this);
}
switch (other.typeCode) {
case Types.SQL_ALL_TYPES:
return this;
case Types.SQL_BIT:
case Types.SQL_BIT_VARYING:
{
long bytePrecision = (other.precision + 7) / 8;
return precision >= bytePrecision ? this : getBinaryType(this.typeCode, bytePrecision);
}
case Types.SQL_BINARY:
return precision >= other.precision ? this : getBinaryType(typeCode, other.precision);
case Types.SQL_VARBINARY:
if (typeCode == Types.SQL_BLOB) {
return precision >= other.precision ? this : getBinaryType(typeCode, other.precision);
} else {
return other.precision >= precision ? other : getBinaryType(other.typeCode, precision);
}
case Types.SQL_BLOB:
return other.precision >= precision ? other : getBinaryType(other.typeCode, precision);
default:
throw Error.error(ErrorCode.X_42562);
}
}
public boolean canConvertFrom(Type otherType) {
return otherType.typeCode == Types.SQL_ALL_TYPES
|| otherType.isBinaryType()
|| otherType.isCharacterType();
}