org.apache.calcite.sql.validate

Interface SqlValidatorCatalogReader

All Known Subinterfaces:

Prepare.CatalogReader

All Known Implementing Classes:

CalciteCatalogReader, DelegatingSqlValidatorCatalogReader

public interface SqlValidatorCatalogReader

Supplies catalog information for SqlValidator.

This interface only provides a thin API to the underlying repository, and this is intentional. By only presenting the repository information of interest to the validator, we reduce the dependency on exact mechanism to implement the repository. It is also possible to construct mock implementations of this interface for testing purposes.

Method Summary

Methods

Modifier and Type	Method and Description
RelDataType	createTypeFromProjection(RelDataType type, List<String> columnNameList)
RelDataTypeField	field(RelDataType rowType, String alias) Finds a field with a given name, using the case-sensitivity of the current session.
int	fieldOrdinal(RelDataType rowType, String alias) Finds the ordinal of a field with a given name, using the case-sensitivity of the current session.
List<SqlMoniker>	getAllSchemaObjectNames(List<String> names) Given fully qualified schema name, returns schema object names as specified.
RelDataType	getNamedType(SqlIdentifier typeName) Finds a user-defined type with the given name, possibly qualified.
List<String>	getSchemaName() Returns the name of the current schema.
SqlValidatorTable	getTable(List<String> names) Finds a table with the given name, possibly qualified.
int	match(List<String> strings, String name)
boolean	matches(String string, String name)

Method Detail

getTable

SqlValidatorTable getTable(List<String> names)

Finds a table with the given name, possibly qualified.

Parameters:

names - Qualified name of table

Returns:

named table, or null if not found

getNamedType

RelDataType getNamedType(SqlIdentifier typeName)

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.

Parameters:

typeName - Name of type

Returns:

named type, or null if not found

getAllSchemaObjectNames

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

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.

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

getSchemaName

List<String> getSchemaName()

Returns the name of the current schema.

Returns:

name of the current schema

field

RelDataTypeField field(RelDataType rowType,
                     String alias)

Finds a field with a given name, using the case-sensitivity of the current session.

fieldOrdinal

int fieldOrdinal(RelDataType rowType,
               String alias)

Finds the ordinal of a field with a given name, using the case-sensitivity of the current session.

matches

boolean matches(String string,
              String name)

match

int match(List<String> strings,
        String name)

createTypeFromProjection

RelDataType createTypeFromProjection(RelDataType type,
                                   List<String> columnNameList)