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

Class JdbcSchema

java.lang.Object

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

All Implemented Interfaces:

org.apache.calcite.schema.Schema

public class JdbcSchema
extends Object
implements org.apache.calcite.schema.Schema

Implementation of Schema that is backed by a JDBC data source.

The tables in the JDBC data source appear to be tables in this schema; queries against this schema are executed against those tables, pushing down as much as possible of the query logic to SQL.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JdbcSchema.Factory Schema factory that creates a JdbcSchema.
static interface	JdbcSchema.Foo Do not use.

Nested classes/interfaces inherited from interface org.apache.calcite.schema.Schema

org.apache.calcite.schema.Schema.TableType

Field Summary

Fields

Modifier and Type	Field and Description
org.apache.calcite.sql.SqlDialect	dialect
static ThreadLocal<JdbcSchema.Foo>	THREAD_METADATA

Constructor Summary

Constructors

Constructor and Description
JdbcSchema(DataSource dataSource, org.apache.calcite.sql.SqlDialect dialect, org.apache.calcite.adapter.jdbc.JdbcConvention convention, @Nullable String catalog, @Nullable String schema) Creates a JDBC schema.

Method Summary

Modifier and Type	Method and Description
static JdbcSchema	create(org.apache.calcite.schema.SchemaPlus parentSchema, String name, DataSource dataSource, org.apache.calcite.sql.SqlDialectFactory dialectFactory, @Nullable String catalog, @Nullable String schema)
static JdbcSchema	create(org.apache.calcite.schema.SchemaPlus parentSchema, String name, DataSource dataSource, @Nullable String catalog, @Nullable String schema)
static JdbcSchema	create(org.apache.calcite.schema.SchemaPlus parentSchema, String name, Map<String,Object> operand) Creates a JdbcSchema, taking credentials from a map.
static org.apache.calcite.sql.SqlDialect	createDialect(DataSource dataSource) Deprecated. Use createDialect(SqlDialectFactory, DataSource) instead
static org.apache.calcite.sql.SqlDialect	createDialect(org.apache.calcite.sql.SqlDialectFactory dialectFactory, DataSource dataSource) Returns a suitable SQL dialect for the given data source.
static DataSource	dataSource(String url, @Nullable String driverClassName, @Nullable String username, @Nullable String password) Creates a JDBC data source with the given specification.
DataSource	getDataSource()
org.apache.calcite.linq4j.tree.Expression	getExpression(@Nullable org.apache.calcite.schema.SchemaPlus parentSchema, String name)
Set<String>	getFunctionNames()
protected com.google.common.collect.Multimap<String,org.apache.calcite.schema.Function>	getFunctions()
Collection<org.apache.calcite.schema.Function>	getFunctions(String name)
@Nullable org.apache.calcite.schema.Schema	getSubSchema(String name)
Set<String>	getSubSchemaNames()
@Nullable org.apache.calcite.schema.Table	getTable(String name)
Set<String>	getTableNames()
@Nullable org.apache.calcite.rel.type.RelProtoDataType	getType(String name)
Set<String>	getTypeNames()
protected Map<String,org.apache.calcite.rel.type.RelProtoDataType>	getTypes()
boolean	isMutable()
org.apache.calcite.schema.Schema	snapshot(org.apache.calcite.schema.SchemaVersion version)

Methods inherited from class java.lang.Object

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

Field Detail

dialect

public final org.apache.calcite.sql.SqlDialect dialect

THREAD_METADATA

public static final ThreadLocal<JdbcSchema.Foo> THREAD_METADATA

Constructor Detail

JdbcSchema

public JdbcSchema(DataSource dataSource,
                  org.apache.calcite.sql.SqlDialect dialect,
                  org.apache.calcite.adapter.jdbc.JdbcConvention convention,
                  @Nullable String catalog,
                  @Nullable String schema)

Creates a JDBC schema.

Parameters:

dataSource - Data source

dialect - SQL dialect

convention - Calling convention

catalog - Catalog name, or null

schema - Schema name pattern

Method Detail

create

public static JdbcSchema create(org.apache.calcite.schema.SchemaPlus parentSchema,
                                String name,
                                DataSource dataSource,
                                @Nullable String catalog,
                                @Nullable String schema)

create

public static JdbcSchema create(org.apache.calcite.schema.SchemaPlus parentSchema,
                                String name,
                                DataSource dataSource,
                                org.apache.calcite.sql.SqlDialectFactory dialectFactory,
                                @Nullable String catalog,
                                @Nullable String schema)

create

public static JdbcSchema create(org.apache.calcite.schema.SchemaPlus parentSchema,
                                String name,
                                Map<String,Object> operand)

Creates a JdbcSchema, taking credentials from a map.

Parameters:

parentSchema - Parent schema

name - Name

operand - Map of property/value pairs

Returns:

A JdbcSchema

createDialect

@Deprecated
public static org.apache.calcite.sql.SqlDialect createDialect(DataSource dataSource)

Deprecated. Use createDialect(SqlDialectFactory, DataSource) instead

Returns a suitable SQL dialect for the given data source.

Parameters:

dataSource - The data source

createDialect

public static org.apache.calcite.sql.SqlDialect createDialect(org.apache.calcite.sql.SqlDialectFactory dialectFactory,
                                                              DataSource dataSource)

Returns a suitable SQL dialect for the given data source.

dataSource

public static DataSource dataSource(String url,
                                    @Nullable String driverClassName,
                                    @Nullable String username,
                                    @Nullable String password)

Creates a JDBC data source with the given specification.

isMutable

public boolean isMutable()

Specified by:

isMutable in interface org.apache.calcite.schema.Schema

snapshot

public org.apache.calcite.schema.Schema snapshot(org.apache.calcite.schema.SchemaVersion version)

Specified by:

snapshot in interface org.apache.calcite.schema.Schema

getDataSource

public DataSource getDataSource()

getExpression

public org.apache.calcite.linq4j.tree.Expression getExpression(@Nullable org.apache.calcite.schema.SchemaPlus parentSchema,
                                                               String name)

Specified by:

getExpression in interface org.apache.calcite.schema.Schema

getFunctions

protected com.google.common.collect.Multimap<String,org.apache.calcite.schema.Function> getFunctions()

getFunctions

public final Collection<org.apache.calcite.schema.Function> getFunctions(String name)

Specified by:

getFunctions in interface org.apache.calcite.schema.Schema

getFunctionNames

public final Set<String> getFunctionNames()

Specified by:

getFunctionNames in interface org.apache.calcite.schema.Schema

getTable

public @Nullable org.apache.calcite.schema.Table getTable(String name)

Specified by:

getTable in interface org.apache.calcite.schema.Schema

getTableNames

public Set<String> getTableNames()

Specified by:

getTableNames in interface org.apache.calcite.schema.Schema

getTypes

protected Map<String,org.apache.calcite.rel.type.RelProtoDataType> getTypes()

getType

public @Nullable org.apache.calcite.rel.type.RelProtoDataType getType(String name)

Specified by:

getType in interface org.apache.calcite.schema.Schema

getTypeNames

public Set<String> getTypeNames()

Specified by:

getTypeNames in interface org.apache.calcite.schema.Schema

getSubSchema

public @Nullable org.apache.calcite.schema.Schema getSubSchema(String name)

Specified by:

getSubSchema in interface org.apache.calcite.schema.Schema

getSubSchemaNames

public Set<String> getSubSchemaNames()

Specified by:

getSubSchemaNames in interface org.apache.calcite.schema.Schema