org.apache.wayang.api.sql.calcite.jdbc

Class JdbcTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

org.apache.calcite.adapter.java.AbstractQueryableTable

org.apache.wayang.api.sql.calcite.jdbc.JdbcTable

All Implemented Interfaces:

org.apache.calcite.schema.ModifiableTable, org.apache.calcite.schema.QueryableTable, org.apache.calcite.schema.ScannableTable, org.apache.calcite.schema.Table, org.apache.calcite.schema.TranslatableTable, org.apache.calcite.schema.Wrapper

public class JdbcTable
extends org.apache.calcite.adapter.java.AbstractQueryableTable
implements org.apache.calcite.schema.TranslatableTable, org.apache.calcite.schema.ScannableTable, org.apache.calcite.schema.ModifiableTable

Queryable that gets its data from a table within a JDBC connection.

The idea is not to read the whole table, however. The idea is to use this as a building block for a query, by applying Queryable operators such as ExtendedEnumerable.where(org.apache.calcite.linq4j.function.Predicate2). The resulting queryable can then be converted to a SQL query, which can be executed efficiently on the JDBC server.

Field Summary

Fields

Modifier and Type	Field and Description
String	jdbcCatalogName
JdbcSchema	jdbcSchema
String	jdbcSchemaName
String	jdbcTableName
org.apache.calcite.schema.Schema.TableType	jdbcTableType

Fields inherited from class org.apache.calcite.adapter.java.AbstractQueryableTable

elementType

Method Summary

Modifier and Type	Method and Description
<T> org.apache.calcite.linq4j.Queryable<T>	asQueryable(org.apache.calcite.linq4j.QueryProvider queryProvider, org.apache.calcite.schema.SchemaPlus schema, String tableName)
org.apache.calcite.schema.Schema.TableType	getJdbcTableType()
@Nullable Collection	getModifiableCollection()
org.apache.calcite.rel.type.RelDataType	getRowType(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory)
org.apache.calcite.linq4j.Enumerable<Object[]>	scan(org.apache.calcite.DataContext root)
org.apache.calcite.sql.SqlIdentifier	tableName() Returns the table name, qualified with catalog and schema name if applicable, as a parse tree node (SqlIdentifier).
org.apache.calcite.rel.core.TableModify	toModificationRel(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.plan.RelOptTable table, org.apache.calcite.prepare.Prepare.CatalogReader catalogReader, org.apache.calcite.rel.RelNode input, org.apache.calcite.rel.core.TableModify.Operation operation, @Nullable List<String> updateColumnList, @Nullable List<org.apache.calcite.rex.RexNode> sourceExpressionList, boolean flattened)
org.apache.calcite.rel.RelNode	toRel(org.apache.calcite.plan.RelOptTable.ToRelContext context, org.apache.calcite.plan.RelOptTable relOptTable)
String	toString()
<C> C	unwrap(Class<C> aClass)

Methods inherited from class org.apache.calcite.adapter.java.AbstractQueryableTable

getElementType, getExpression

Methods inherited from class org.apache.calcite.schema.impl.AbstractTable

getStatistic, isRolledUp, rolledUpColumnValidInsideAgg

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.calcite.schema.QueryableTable

getElementType, getExpression

Methods inherited from interface org.apache.calcite.schema.Table

getStatistic, isRolledUp, rolledUpColumnValidInsideAgg

Methods inherited from interface org.apache.calcite.schema.Wrapper

maybeUnwrap, unwrapOrThrow

Field Detail

jdbcSchema

public final JdbcSchema jdbcSchema

jdbcCatalogName

public final String jdbcCatalogName

jdbcSchemaName

public final String jdbcSchemaName

jdbcTableName

public final String jdbcTableName

jdbcTableType

public final org.apache.calcite.schema.Schema.TableType jdbcTableType

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getJdbcTableType

public org.apache.calcite.schema.Schema.TableType getJdbcTableType()

Specified by:

getJdbcTableType in interface org.apache.calcite.schema.Table

Overrides:

getJdbcTableType in class org.apache.calcite.schema.impl.AbstractTable

unwrap

public <C> C unwrap(Class<C> aClass)

Specified by:

unwrap in interface org.apache.calcite.schema.Wrapper

Overrides:

unwrap in class org.apache.calcite.schema.impl.AbstractTable

getRowType

public org.apache.calcite.rel.type.RelDataType getRowType(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory)

Specified by:

getRowType in interface org.apache.calcite.schema.Table

tableName

public org.apache.calcite.sql.SqlIdentifier tableName()

Returns the table name, qualified with catalog and schema name if applicable, as a parse tree node (SqlIdentifier).

toRel

public org.apache.calcite.rel.RelNode toRel(org.apache.calcite.plan.RelOptTable.ToRelContext context,
                                            org.apache.calcite.plan.RelOptTable relOptTable)

Specified by:

toRel in interface org.apache.calcite.schema.TranslatableTable

asQueryable

public <T> org.apache.calcite.linq4j.Queryable<T> asQueryable(org.apache.calcite.linq4j.QueryProvider queryProvider,
                                                              org.apache.calcite.schema.SchemaPlus schema,
                                                              String tableName)

Specified by:

asQueryable in interface org.apache.calcite.schema.QueryableTable

scan

public org.apache.calcite.linq4j.Enumerable<Object[]> scan(org.apache.calcite.DataContext root)

Specified by:

scan in interface org.apache.calcite.schema.ScannableTable

getModifiableCollection

public @Nullable Collection getModifiableCollection()

Specified by:

getModifiableCollection in interface org.apache.calcite.schema.ModifiableTable

toModificationRel

public org.apache.calcite.rel.core.TableModify toModificationRel(org.apache.calcite.plan.RelOptCluster cluster,
                                                                 org.apache.calcite.plan.RelOptTable table,
                                                                 org.apache.calcite.prepare.Prepare.CatalogReader catalogReader,
                                                                 org.apache.calcite.rel.RelNode input,
                                                                 org.apache.calcite.rel.core.TableModify.Operation operation,
                                                                 @Nullable List<String> updateColumnList,
                                                                 @Nullable List<org.apache.calcite.rex.RexNode> sourceExpressionList,
                                                                 boolean flattened)

Specified by:

toModificationRel in interface org.apache.calcite.schema.ModifiableTable