Package org.apache.calcite.adapter.csv
Class JsonTable
- java.lang.Object
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- org.apache.calcite.schema.impl.AbstractTable
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- org.apache.calcite.adapter.csv.JsonTable
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- All Implemented Interfaces:
ScannableTable
,Table
,Wrapper
public class JsonTable extends AbstractTable implements ScannableTable
Table based on a JSON file.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description RelDataType
getRowType(RelDataTypeFactory typeFactory)
Returns this table's row type.Enumerable<java.lang.Object[]>
scan(DataContext root)
Returns an enumerator over the rows in this Table.java.lang.String
toString()
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Methods inherited from class org.apache.calcite.schema.impl.AbstractTable
getJdbcTableType, getStatistic, isRolledUp, rolledUpColumnValidInsideAgg, unwrap
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.apache.calcite.schema.Table
getJdbcTableType, getStatistic, isRolledUp, rolledUpColumnValidInsideAgg
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Field Detail
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source
private final Source source
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Constructor Detail
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JsonTable
public JsonTable(Source source)
Creates a JsonTable.
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Method Detail
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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getRowType
public RelDataType getRowType(RelDataTypeFactory typeFactory)
Description copied from interface:Table
Returns this table's row type.This is a struct type whose fields describe the names and types of the columns in this table.
The implementer must use the type factory provided. This ensures that the type is converted into a canonical form; other equal types in the same query will use the same object.
- Specified by:
getRowType
in interfaceTable
- Parameters:
typeFactory
- Type factory with which to create the type- Returns:
- Row type
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scan
public Enumerable<java.lang.Object[]> scan(DataContext root)
Description copied from interface:ScannableTable
Returns an enumerator over the rows in this Table. Each row is represented as an array of its column values.- Specified by:
scan
in interfaceScannableTable
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