org.apache.calcite.prepare

Interface Prepare.CatalogReader

All Superinterfaces:

RelOptSchema, SqlValidatorCatalogReader

All Known Implementing Classes:

CalciteCatalogReader

Enclosing class:

Prepare

public static interface Prepare.CatalogReader
extends RelOptSchema, SqlValidatorCatalogReader

Interface by which validator and planner can read table metadata.

Method Summary

Methods

Modifier and Type	Method and Description
Prepare.PreparingTable	getTable(List<String> names) Finds a table with the given name, possibly qualified.
Prepare.PreparingTable	getTableForMember(List<String> names) Retrieves a RelOptTable based upon a member access.
Prepare.CatalogReader	withSchemaPath(List<String> schemaPath) Returns a catalog reader the same as this one but with a possibly different schema path.

Methods inherited from interface org.apache.calcite.plan.RelOptSchema

getTypeFactory, registerRules

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

createTypeFromProjection, field, fieldOrdinal, getAllSchemaObjectNames, getNamedType, getSchemaName, match, matches

Method Detail

getTableForMember

Prepare.PreparingTable getTableForMember(List<String> names)

Description copied from interface: RelOptSchema

Retrieves a RelOptTable based upon a member access.

For example, the Saffron expression salesSchema.emps would be resolved using a call to salesSchema.getTableForMember(new String[]{"emps" }).

Note that name.length is only greater than 1 for queries originating from JDBC.

Specified by:

getTableForMember in interface RelOptSchema

Parameters:

names - Qualified name

withSchemaPath

Prepare.CatalogReader withSchemaPath(List<String> schemaPath)

Returns a catalog reader the same as this one but with a possibly different schema path.

getTable

Prepare.PreparingTable getTable(List<String> names)

Description copied from interface: SqlValidatorCatalogReader

Finds a table with the given name, possibly qualified.

Specified by:

getTable in interface SqlValidatorCatalogReader

Parameters:

names - Qualified name of table

Returns:

named table, or null if not found