Package org.apache.calcite.rel.type

Interface RelDataTypeSystem

All Known Implementing Classes:

RelDataTypeSystemImpl

public interface RelDataTypeSystem

Type system.

Provides behaviors concerning type limits and behaviors. For example, in the default system, a DECIMAL can have maximum precision 19, but Hive overrides to 38.

The default implementation is DEFAULT.

Field Summary

Fields

Modifier and Type	Field	Description
static RelDataTypeSystem	DEFAULT	Default type system.

Method Summary

Modifier and Type	Method	Description
RelDataType	deriveSumType(RelDataTypeFactory typeFactory, RelDataType argumentType)	Returns the return type of SUM aggregate function inferred from its argument type.
int	getDefaultPrecision(SqlTypeName typeName)	Returns default precision for this type if supported, otherwise -1 if precision is either unsupported or must be specified explicitly.
String	getLiteral(SqlTypeName typeName, boolean isPrefix)	Returns the LITERAL string for the type, either PREFIX/SUFFIX.
int	getMaxNumericPrecision()	Returns the maximum precision of a NUMERIC or DECIMAL type.
int	getMaxNumericScale()	Returns the maximum scale of a NUMERIC or DECIMAL type.
int	getMaxPrecision(SqlTypeName typeName)	Returns the maximum precision (or length) allowed for this type, or -1 if precision/length are not applicable for this type.
int	getMaxScale(SqlTypeName typeName)	Returns the maximum scale of a given type.
int	getNumTypeRadix(SqlTypeName typeName)	Returns the numeric type Radix, 2 or 10.
boolean	isAutoincrement(SqlTypeName typeName)	Returns if the type can be auto increment true or not (false)
boolean	isCaseSensitive(SqlTypeName typeName)	Returns if the type is case sensitive true or not (false)
boolean	isSchemaCaseSensitive()	Whether two record types are considered distinct if their field names are the same but in different cases.

Field Detail

DEFAULT

static final RelDataTypeSystem DEFAULT

Default type system.

Method Detail

getMaxScale

int getMaxScale(SqlTypeName typeName)

Returns the maximum scale of a given type.

getDefaultPrecision

int getDefaultPrecision(SqlTypeName typeName)

Returns default precision for this type if supported, otherwise -1 if precision is either unsupported or must be specified explicitly.

Returns:

Default precision

getMaxPrecision

int getMaxPrecision(SqlTypeName typeName)

Returns the maximum precision (or length) allowed for this type, or -1 if precision/length are not applicable for this type.

Returns:

Maximum allowed precision

getMaxNumericScale

int getMaxNumericScale()

Returns the maximum scale of a NUMERIC or DECIMAL type.

getMaxNumericPrecision

int getMaxNumericPrecision()

Returns the maximum precision of a NUMERIC or DECIMAL type.

getLiteral

String getLiteral(SqlTypeName typeName,
                  boolean isPrefix)

Returns the LITERAL string for the type, either PREFIX/SUFFIX.

isCaseSensitive

boolean isCaseSensitive(SqlTypeName typeName)

Returns if the type is case sensitive true or not (false)

isAutoincrement

boolean isAutoincrement(SqlTypeName typeName)

Returns if the type can be auto increment true or not (false)

getNumTypeRadix

int getNumTypeRadix(SqlTypeName typeName)

Returns the numeric type Radix, 2 or 10. 0 represent not applicable

deriveSumType

RelDataType deriveSumType(RelDataTypeFactory typeFactory,
                          RelDataType argumentType)

Returns the return type of SUM aggregate function inferred from its argument type.

isSchemaCaseSensitive

boolean isSchemaCaseSensitive()

Whether two record types are considered distinct if their field names are the same but in different cases.