Package org.apache.drill.exec.store.ischema

Class FilterEvaluator.InfoSchemaFilterEvaluator

java.lang.Object

org.apache.drill.exec.store.ischema.FilterEvaluator.NoFilterEvaluator

org.apache.drill.exec.store.ischema.FilterEvaluator.InfoSchemaFilterEvaluator

All Implemented Interfaces:

FilterEvaluator

Enclosing interface:

FilterEvaluator

public static class FilterEvaluator.InfoSchemaFilterEvaluator
extends FilterEvaluator.NoFilterEvaluator

Evaluates necessity to visit certain type of information_schema data using provided filter.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.drill.exec.store.ischema.FilterEvaluator

FilterEvaluator.InfoSchemaFilterEvaluator, FilterEvaluator.NoFilterEvaluator

Field Summary

Fields inherited from class org.apache.drill.exec.store.ischema.FilterEvaluator.NoFilterEvaluator

INSTANCE

Constructor Summary

Constructors

Constructor	Description
InfoSchemaFilterEvaluator(InfoSchemaFilter filter)

Method Summary

Modifier and Type	Method	Description
boolean	shouldPruneSchema(String schemaName)	Prune the given schema.
boolean	shouldVisitCatalog()	Visit the catalog.
boolean	shouldVisitColumn(String schemaName, String tableName, String columnName)	Visit the columns in the given schema and table.
boolean	shouldVisitFiles(String schemaName, org.apache.calcite.schema.SchemaPlus schema)	Visit the files in the given schema.
boolean	shouldVisitSchema(String schemaName, org.apache.calcite.schema.SchemaPlus schema)	Visit the given schema.
boolean	shouldVisitTable(String schemaName, String tableName, org.apache.calcite.schema.Schema.TableType tableType)	Visit the tables in the given schema.

Methods inherited from class java.lang.Object

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

Constructor Details

InfoSchemaFilterEvaluator

public InfoSchemaFilterEvaluator(InfoSchemaFilter filter)

Method Details

shouldVisitCatalog

public boolean shouldVisitCatalog()

Description copied from interface: FilterEvaluator

Visit the catalog. Drill has only one catalog.

Specified by:

shouldVisitCatalog in interface FilterEvaluator

Overrides:

shouldVisitCatalog in class FilterEvaluator.NoFilterEvaluator

Returns:

whether to continue exploring the contents of the catalog or not. Contents are schema/schema tree.

shouldPruneSchema

public boolean shouldPruneSchema(String schemaName)

Description copied from interface: FilterEvaluator

Prune the given schema.

Specified by:

shouldPruneSchema in interface FilterEvaluator

Overrides:

shouldPruneSchema in class FilterEvaluator.NoFilterEvaluator

Parameters:

schemaName - name of the schema

Returns:

whether to prune this schema and all its descendants from the search tree.

shouldVisitSchema

public boolean shouldVisitSchema(String schemaName,
 org.apache.calcite.schema.SchemaPlus schema)

Description copied from interface: FilterEvaluator

Visit the given schema.

Specified by:

shouldVisitSchema in interface FilterEvaluator

Overrides:

shouldVisitSchema in class FilterEvaluator.NoFilterEvaluator

Parameters:

schemaName - name of the schema

schema - schema object

Returns:

whether to continue exploring the contents of the schema or not. Contents are tables within the schema.

shouldVisitTable

public boolean shouldVisitTable(String schemaName,
 String tableName,
 org.apache.calcite.schema.Schema.TableType tableType)

Description copied from interface: FilterEvaluator

Visit the tables in the given schema.

Specified by:

shouldVisitTable in interface FilterEvaluator

Overrides:

shouldVisitTable in class FilterEvaluator.NoFilterEvaluator

Parameters:

schemaName - name of the schema

tableName - name of the table

tableType - type of the table

Returns:

whether to continue exploring the contents of the table or not. Contents are tables attributes and columns.

shouldVisitColumn

public boolean shouldVisitColumn(String schemaName,
 String tableName,
 String columnName)

Description copied from interface: FilterEvaluator

Visit the columns in the given schema and table.

Specified by:

shouldVisitColumn in interface FilterEvaluator

Overrides:

shouldVisitColumn in class FilterEvaluator.NoFilterEvaluator

Parameters:

schemaName - name of the schema

tableName - name of the table

columnName - type of the table

Returns:

whether to continue exploring the contents of the column or not. Contents are columns attributes.

shouldVisitFiles

public boolean shouldVisitFiles(String schemaName,
 org.apache.calcite.schema.SchemaPlus schema)

Description copied from interface: FilterEvaluator

Visit the files in the given schema.

Specified by:

shouldVisitFiles in interface FilterEvaluator

Overrides:

shouldVisitFiles in class FilterEvaluator.NoFilterEvaluator

Parameters:

schemaName - name of the schema

schema - schema object

Returns:

whether to continue exploring the files in the schema