Package org.apache.calcite.sql.validate

Class DelegatingSqlValidatorCatalogReader

java.lang.Object

org.apache.calcite.sql.validate.DelegatingSqlValidatorCatalogReader

All Implemented Interfaces:

Wrapper, SqlValidatorCatalogReader

public abstract class DelegatingSqlValidatorCatalogReader
extends Object
implements SqlValidatorCatalogReader

Implementation of SqlValidatorCatalogReader that passes all calls to a parent catalog reader.

Field Summary

Fields

Modifier and Type	Field	Description
protected final SqlValidatorCatalogReader	catalogReader

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DelegatingSqlValidatorCatalogReader(SqlValidatorCatalogReader catalogReader)	Creates a DelegatingSqlValidatorCatalogReader.

Method Summary

Modifier and Type	Method	Description
List<SqlMoniker>	getAllSchemaObjectNames(List<String> names)	Given fully qualified schema name, returns schema object names as specified.
@Nullable RelDataType	getNamedType(SqlIdentifier typeName)	Finds a user-defined type with the given name, possibly qualified.
List<List<String>>	getSchemaPaths()	Returns the paths of all schemas to look in for tables.
@Nullable SqlValidatorTable	getTable(List<String> names)	Finds a table or schema with the given name, possibly qualified.
<C> @Nullable C	unwrap(Class<C> aClass)	Finds an instance of an interface implemented by this object, or returns null if this object does not support that interface.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.sql.validate.SqlValidatorCatalogReader

createTypeFromProjection, field, getConfig, getRootSchema, isCaseSensitive, matches, nameMatcher

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

maybeUnwrap, unwrapOrThrow

Field Details

catalogReader

protected final SqlValidatorCatalogReader catalogReader

Constructor Details

DelegatingSqlValidatorCatalogReader

protected DelegatingSqlValidatorCatalogReader(SqlValidatorCatalogReader catalogReader)

Creates a DelegatingSqlValidatorCatalogReader.

Parameters:

catalogReader - Parent catalog reader

Method Details

getTable

public @Nullable SqlValidatorTable getTable(List<String> names)

Description copied from interface: SqlValidatorCatalogReader

Finds a table or schema with the given name, possibly qualified.

Uses the case-sensitivity policy of the catalog reader.

If not found, returns null. If you want a more descriptive error message or to override the case-sensitivity of the match, use SqlValidatorScope.resolveTable(java.util.List<java.lang.String>, org.apache.calcite.sql.validate.SqlNameMatcher, org.apache.calcite.sql.validate.SqlValidatorScope.Path, org.apache.calcite.sql.validate.SqlValidatorScope.Resolved).

Specified by:

getTable in interface SqlValidatorCatalogReader

Parameters:

names - Name of table, may be qualified or fully-qualified

Returns:

Table with the given name, or null

getNamedType

public @Nullable RelDataType getNamedType(SqlIdentifier typeName)

Description copied from interface: SqlValidatorCatalogReader

Finds a user-defined type with the given name, possibly qualified.

NOTE jvs 12-Feb-2005: the reason this method is defined here instead of on RelDataTypeFactory is that it has to take into account context-dependent information such as SQL schema path, whereas a type factory is context-independent.

Specified by:

getNamedType in interface SqlValidatorCatalogReader

Parameters:

typeName - Name of type

Returns:

named type, or null if not found

getAllSchemaObjectNames

public List<SqlMoniker> getAllSchemaObjectNames(List<String> names)

Description copied from interface: SqlValidatorCatalogReader

Given fully qualified schema name, returns schema object names as specified. They can be schema, table, function, view. When names array is empty, the contents of root schema should be returned.

Specified by:

getAllSchemaObjectNames in interface SqlValidatorCatalogReader

Parameters:

names - the array contains fully qualified schema name or empty list for root schema

Returns:

the list of all object (schema, table, function, view) names under the above criteria

getSchemaPaths

public List<List<String>> getSchemaPaths()

Description copied from interface: SqlValidatorCatalogReader

Returns the paths of all schemas to look in for tables.

Specified by:

getSchemaPaths in interface SqlValidatorCatalogReader

Returns:

paths of current schema and root schema

unwrap

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

Description copied from interface: Wrapper

Finds an instance of an interface implemented by this object, or returns null if this object does not support that interface.

Specified by:

unwrap in interface Wrapper