PhysTypeImpl (Calcite Core 1.2.0-incubating API)

java.lang.Object
- org.apache.calcite.adapter.enumerable.PhysTypeImpl

All Implemented Interfaces:: PhysType

public class PhysTypeImpl
extends Object
implements PhysType

Implementation of PhysType.

Method Summary

Methods
Modifier and Type	Method and Description
`List<Expression>`	`accessors(Expression v1, List<Integer> argList)`
`Expression`	`comparer()` Returns a expression that yields a comparer, or null if this type is comparable.
`Expression`	`convertTo(Expression exp, PhysType targetPhysType)` Converts an enumerable of this physical type to an enumerable that uses a given physical type for its rows.
`Class`	`fieldClass(int field)` Returns the Java class of the field with the given ordinal.
`boolean`	`fieldNullable(int field)` Returns whether a given field allows null values.
`Expression`	`fieldReference(Expression expression, int field)` Generates a reference to a given field in an expression.
`Expression`	`fieldReference(Expression expression, int field, Type storageType)` Generates a reference to a given field in an expression.
`Expression`	`generateAccessor(List<Integer> fields)` Generates an accessor function for a given list of fields.
`Pair<Expression,Expression>`	`generateCollationKey(List<RelFieldCollation> collations)` Returns a lambda to create a collation key and a comparator.
`Expression`	`generateComparator(RelCollation collation)` Returns a comparator.
`Expression`	`generateSelector(ParameterExpression parameter, List<Integer> fields)` Generates a selector for the given fields from an expression, with the default row format.
`Expression`	`generateSelector(ParameterExpression parameter, List<Integer> fields, JavaRowFormat targetFormat)` Generates a lambda expression that is a selector for the given fields from an expression.
`Expression`	`generateSelector(ParameterExpression parameter, List<Integer> fields, List<Integer> usedFields, JavaRowFormat targetFormat)` Generates a lambda expression that is a selector for the given fields from an expression.
`JavaRowFormat`	`getFormat()` Returns the format.
`Type`	`getJavaFieldType(int index)` Returns the Java class that is used to store the field with the given ordinal.
`Type`	`getJavaRowType()` Returns the Java type (often a Class) that represents a row.
`RelDataType`	`getRowType()` Returns the SQL row type.
`PhysType`	`makeNullable(boolean nullable)` Returns a copy of this type that allows nulls if `nullable` is true.
`static PhysType`	`of(JavaTypeFactory typeFactory, RelDataType rowType, JavaRowFormat format)`
`static PhysType`	`of(JavaTypeFactory typeFactory, RelDataType rowType, JavaRowFormat format, boolean optimize)`
`PhysType`	`project(List<Integer> integers, boolean indicator, JavaRowFormat format)` Projects a given collection of fields from this input record, optionally with indicator fields, into a particular preferred output format.
`PhysType`	`project(List<Integer> integers, JavaRowFormat format)` Projects a given collection of fields from this input record, into a particular preferred output format.
`Expression`	`record(List<Expression> expressions)` Generates an expression that creates a record for a row, initializing its fields with the given expressions.
`Expression`	`selector(ParameterExpression parameter, List<Integer> fields, JavaRowFormat targetFormat)` Generates a selector for the given fields from an expression.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - of
```
public static PhysType of(JavaTypeFactory typeFactory,
          RelDataType rowType,
          JavaRowFormat format)
```
  - of
```
public static PhysType of(JavaTypeFactory typeFactory,
          RelDataType rowType,
          JavaRowFormat format,
          boolean optimize)
```
  - getFormat
```
public JavaRowFormat getFormat()
```
    Description copied from interface: PhysType
    
    Returns the format.
    
    Specified by:
    
    getFormat in interface PhysType
  - project
```
public PhysType project(List<Integer> integers,
               JavaRowFormat format)
```
    Description copied from interface: PhysType
    
    Projects a given collection of fields from this input record, into a particular preferred output format. The output format is optimized if there are 0 or 1 fields.
    
    Specified by:
    
    project in interface PhysType
  - project
```
public PhysType project(List<Integer> integers,
               boolean indicator,
               JavaRowFormat format)
```
    Description copied from interface: PhysType
    
    Projects a given collection of fields from this input record, optionally with indicator fields, into a particular preferred output format.
    The output format is optimized if there are 0 or 1 fields and indicators are disabled.
    
    Specified by:
    
    project in interface PhysType
  - generateSelector
```
public Expression generateSelector(ParameterExpression parameter,
                          List<Integer> fields)
```
    Description copied from interface: PhysType
    
    Generates a selector for the given fields from an expression, with the default row format.
    
    Specified by:
    
    generateSelector in interface PhysType
  - generateSelector
```
public Expression generateSelector(ParameterExpression parameter,
                          List<Integer> fields,
                          JavaRowFormat targetFormat)
```
    Description copied from interface: PhysType
    
    Generates a lambda expression that is a selector for the given fields from an expression.
    
    Specified by:
    
    generateSelector in interface PhysType
  - generateSelector
```
public Expression generateSelector(ParameterExpression parameter,
                          List<Integer> fields,
                          List<Integer> usedFields,
                          JavaRowFormat targetFormat)
```
    Description copied from interface: PhysType
    
    Generates a lambda expression that is a selector for the given fields from an expression.
    usedFields must be a subset of fields. For each field, there is a corresponding indicator field. If a field is used, its value is assigned and its indicator is left false. If a field is not used, its value is not assigned and its indicator is set to true; This will become a value of 1 when GROUPING(field) is called.
    
    Specified by:
    
    generateSelector in interface PhysType
  - selector
```
public Expression selector(ParameterExpression parameter,
                  List<Integer> fields,
                  JavaRowFormat targetFormat)
```
    Description copied from interface: PhysType
    
    Generates a selector for the given fields from an expression.
    
    Specified by:
    
    selector in interface PhysType
  - accessors
```
public List<Expression> accessors(Expression v1,
                         List<Integer> argList)
```
    Specified by:
    
    accessors in interface PhysType
  - makeNullable
```
public PhysType makeNullable(boolean nullable)
```
    Description copied from interface: PhysType
    
    Returns a copy of this type that allows nulls if nullable is true.
    
    Specified by:
    
    makeNullable in interface PhysType
  - convertTo
```
public Expression convertTo(Expression exp,
                   PhysType targetPhysType)
```
    Description copied from interface: PhysType
    
    Converts an enumerable of this physical type to an enumerable that uses a given physical type for its rows.
    
    Specified by:
    
    convertTo in interface PhysType
  - generateCollationKey
```
public Pair<Expression,Expression> generateCollationKey(List<RelFieldCollation> collations)
```
    Description copied from interface: PhysType
    
    Returns a lambda to create a collation key and a comparator. The comparator is sometimes null.
    
    Specified by:
    
    generateCollationKey in interface PhysType
  - generateComparator
```
public Expression generateComparator(RelCollation collation)
```
    Description copied from interface: PhysType
    
    Returns a comparator. Unlike the comparator returned by PhysType.generateCollationKey(java.util.List), this comparator acts on the whole element.
    
    Specified by:
    
    generateComparator in interface PhysType
  - getRowType
```
public RelDataType getRowType()
```
    Description copied from interface: PhysType
    
    Returns the SQL row type.
    
    Specified by:
    
    getRowType in interface PhysType
  - record
```
public Expression record(List<Expression> expressions)
```
    Description copied from interface: PhysType
    
    Generates an expression that creates a record for a row, initializing its fields with the given expressions. There must be one expression per field.
    
    Specified by:
    
    record in interface PhysType
    
    Parameters:
    expressions - Expression to initialize each field
    
    Returns:
    Expression to create a row
  - getJavaRowType
```
public Type getJavaRowType()
```
    Description copied from interface: PhysType
    
    Returns the Java type (often a Class) that represents a row. For example, in one row format, always returns Object[].class.
    
    Specified by:
    
    getJavaRowType in interface PhysType
  - getJavaFieldType
```
public Type getJavaFieldType(int index)
```
    Description copied from interface: PhysType
    
    Returns the Java class that is used to store the field with the given ordinal.
    For instance, when the java row type is Object[], the java field type is Object even if the field is not nullable.
    
    Specified by:
    
    getJavaFieldType in interface PhysType
  - comparer
```
public Expression comparer()
```
    Description copied from interface: PhysType
    
    Returns a expression that yields a comparer, or null if this type is comparable.
    
    Specified by:
    
    comparer in interface PhysType
  - fieldClass
```
public Class fieldClass(int field)
```
    Description copied from interface: PhysType
    
    Returns the Java class of the field with the given ordinal.
    
    Specified by:
    
    fieldClass in interface PhysType
  - fieldNullable
```
public boolean fieldNullable(int field)
```
    Description copied from interface: PhysType
    
    Returns whether a given field allows null values.
    
    Specified by:
    
    fieldNullable in interface PhysType
  - generateAccessor
```
public Expression generateAccessor(List<Integer> fields)
```
    Description copied from interface: PhysType
    Generates an accessor function for a given list of fields. The resulting object is a List (implementing Object.hashCode() and Object.equals(Object) per that interface) and also implements Comparable.
    For example:
```
new Function1<Employee, Object[]> {
    public Object[] apply(Employee v1) {
        return FlatLists.of(v1.<fieldN>, v1.<fieldM>);
    }
 }
 
```
    Specified by:
    
    generateAccessor in interface PhysType
  - fieldReference
```
public Expression fieldReference(Expression expression,
                        int field)
```
    Description copied from interface: PhysType
    Generates a reference to a given field in an expression.
    For example given expression=employee and field=2, generates
```
employee.deptno
```
    Specified by:
    
    fieldReference in interface PhysType
    
    Parameters:
    expression - Expression
    field - Ordinal of field
    
    Returns:
    Expression to access the field of the expression
  - fieldReference
```
public Expression fieldReference(Expression expression,
                        int field,
                        Type storageType)
```
    Description copied from interface: PhysType
    Generates a reference to a given field in an expression.
    This method optimizes for the target storage type (i.e. avoids casts).
    
    For example given expression=employee and field=2, generates
```
employee.deptno
```
    Specified by:
    
    fieldReference in interface PhysType
    
    Parameters:
    expression - Expression
    field - Ordinal of field
    storageType - optional hint for storage class
    
    Returns:
    Expression to access the field of the expression

Class PhysTypeImpl

Method Summary

Methods inherited from class java.lang.Object

Method Detail

of

of

getFormat

project

project

generateSelector

generateSelector

generateSelector

selector

accessors

makeNullable

convertTo

generateCollationKey

generateComparator

getRowType

record

getJavaRowType

getJavaFieldType

comparer

fieldClass

fieldNullable

generateAccessor

fieldReference

fieldReference