/**
* Imperfect estimate of row size given a PTable TODO: keep row count in stats table and use total
* size / row count instead
*
* @param table
* @return estimate of size in bytes of a row
*/
public static long estimateRowSize(PTable table) {
int keyLength = estimateKeyLength(table);
long rowSize = 0;
for (PColumn column : table.getColumns()) {
if (!SchemaUtil.isPKColumn(column)) {
PDataType type = column.getDataType();
Integer maxLength = column.getMaxLength();
int valueLength =
!type.isFixedWidth()
? VAR_KV_LENGTH_ESTIMATE
: maxLength == null ? type.getByteSize() : maxLength;
rowSize +=
KeyValue.getKeyValueDataStructureSize(
keyLength,
column.getFamilyName().getBytes().length,
column.getName().getBytes().length,
valueLength);
}
}
// Empty key value
rowSize +=
KeyValue.getKeyValueDataStructureSize(
keyLength,
getEmptyColumnFamily(table).length,
QueryConstants.EMPTY_COLUMN_BYTES.length,
0);
return rowSize;
}
// TODO: cache?
public static LiteralExpression newConstant(
Object value,
PDataType type,
Integer maxLength,
Integer scale,
SortOrder sortOrder,
Determinism determinism,
boolean rowKeyOrderOptimizable)
throws SQLException {
if (value == null) {
return (type == null)
? getNullLiteralExpression(determinism)
: getTypedNullLiteralExpression(type, determinism);
} else if (value instanceof Boolean) {
return getBooleanLiteralExpression((Boolean) value, determinism);
}
PDataType actualType = PDataType.fromLiteral(value);
// For array we should check individual element in it?
// It would be costly though!!!!!
// UpsertStatement can try to cast varchar to date type but PVarchar can't CoercibleTo Date or
// Timestamp
// otherwise TO_NUMBER like functions will fail
if (!actualType.isCoercibleTo(type, value)
&& (!actualType.equals(PVarchar.INSTANCE)
|| !(type.equals(PDate.INSTANCE)
|| type.equals(PTimestamp.INSTANCE)
|| type.equals(PTime.INSTANCE)))) {
throw TypeMismatchException.newException(type, actualType, value.toString());
}
value = type.toObject(value, actualType);
byte[] b =
type.isArrayType()
? ((PArrayDataType) type)
.toBytes(
value, PArrayDataType.arrayBaseType(type), sortOrder, rowKeyOrderOptimizable)
: type.toBytes(value, sortOrder);
if (type == PVarchar.INSTANCE || type == PChar.INSTANCE) {
if (type == PChar.INSTANCE && maxLength != null && b.length < maxLength) {
if (rowKeyOrderOptimizable) {
b = type.pad(b, maxLength, sortOrder);
} else {
b = StringUtil.padChar(b, maxLength);
}
} else if (value != null) {
maxLength = ((String) value).length();
}
} else if (type.isArrayType()) {
maxLength = ((PhoenixArray) value).getMaxLength();
}
if (b.length == 0) {
return getTypedNullLiteralExpression(type, determinism);
}
if (maxLength == null) {
maxLength = type == null || !type.isFixedWidth() ? null : type.getMaxLength(value);
}
return new LiteralExpression(value, type, b, maxLength, scale, sortOrder, determinism);
}
private LiteralExpression(
Object value, PDataType type, byte[] byteValue, Determinism determinism) {
this(
value,
type,
byteValue,
type == null || !type.isFixedWidth() ? null : type.getMaxLength(value),
null,
SortOrder.getDefault(),
determinism);
}
public static PName padTenantIdIfNecessary(
RowKeySchema schema, boolean isSalted, PName tenantId) {
int pkPos = isSalted ? 1 : 0;
String tenantIdStr = tenantId.getString();
Field field = schema.getField(pkPos);
PDataType dataType = field.getDataType();
boolean isFixedWidth = dataType.isFixedWidth();
Integer maxLength = field.getMaxLength();
if (isFixedWidth && maxLength != null) {
if (tenantIdStr.length() < maxLength) {
tenantIdStr = (String) dataType.pad(tenantIdStr, maxLength);
return PNameFactory.newName(tenantIdStr);
}
}
return tenantId;
}
/**
* Estimate the max key length in bytes of the PK for a given table
*
* @param table the table
* @return the max PK length
*/
public static int estimateKeyLength(PTable table) {
int maxKeyLength = 0;
// Calculate the max length of a key (each part must currently be of a fixed width)
int i = 0;
List<PColumn> columns = table.getPKColumns();
while (i < columns.size()) {
PColumn keyColumn = columns.get(i++);
PDataType type = keyColumn.getDataType();
Integer maxLength = keyColumn.getMaxLength();
maxKeyLength +=
!type.isFixedWidth()
? VAR_LENGTH_ESTIMATE
: maxLength == null ? type.getByteSize() : maxLength;
}
return maxKeyLength;
}
