org.apache.flink.table.planner.delegation

Class ParserImpl

java.lang.Object

org.apache.flink.table.planner.delegation.ParserImpl

All Implemented Interfaces:

Parser

Direct Known Subclasses:

HiveParser

public class ParserImpl
extends Object
implements Parser

Implementation of Parser that uses Calcite.

Constructor Summary

Constructors

Constructor and Description
ParserImpl(CatalogManager catalogManager, java.util.function.Supplier<org.apache.flink.table.planner.calcite.FlinkPlannerImpl> validatorSupplier, java.util.function.Supplier<CalciteParser> calciteParserSupplier, RexFactory rexFactory)

Method Summary

Modifier and Type	Method and Description
CatalogManager	getCatalogManager()
String[]	getCompletionHints(String statement, int cursor) Returns completion hints for the given statement at the given cursor position.
List<Operation>	parse(String statement) When parsing statement, it first uses ExtendedParser to parse statements.
UnresolvedIdentifier	parseIdentifier(String identifier) Entry point for parsing SQL identifiers expressed as a String.
ResolvedExpression	parseSqlExpression(String sqlExpression, RowType inputRowType, LogicalType outputType) Entry point for parsing SQL expressions expressed as a String.

Methods inherited from class java.lang.Object

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

Constructor Detail

ParserImpl

public ParserImpl(CatalogManager catalogManager,
                  java.util.function.Supplier<org.apache.flink.table.planner.calcite.FlinkPlannerImpl> validatorSupplier,
                  java.util.function.Supplier<CalciteParser> calciteParserSupplier,
                  RexFactory rexFactory)

Method Detail

parse

public List<Operation> parse(String statement)

When parsing statement, it first uses ExtendedParser to parse statements. If ExtendedParser fails to parse statement, it uses the CalciteParser to parse statements.

Specified by:

parse in interface Parser

Parameters:

statement - input statement.

Returns:

parsed operations.

parseIdentifier

public UnresolvedIdentifier parseIdentifier(String identifier)

Description copied from interface: Parser

Entry point for parsing SQL identifiers expressed as a String.

Specified by:

parseIdentifier in interface Parser

Parameters:

identifier - the SQL identifier to parse

Returns:

parsed identifier

parseSqlExpression

public ResolvedExpression parseSqlExpression(String sqlExpression,
                                             RowType inputRowType,
                                             @Nullable
                                             LogicalType outputType)

Description copied from interface: Parser

Entry point for parsing SQL expressions expressed as a String.

Specified by:

parseSqlExpression in interface Parser

Parameters:

sqlExpression - the SQL expression to parse

inputRowType - the fields available in the SQL expression

outputType - expected top-level output type if available

Returns:

resolved expression

getCompletionHints

public String[] getCompletionHints(String statement,
                                   int cursor)

Description copied from interface: Parser

Returns completion hints for the given statement at the given cursor position. The completion happens case insensitively.

Specified by:

getCompletionHints in interface Parser

Parameters:

statement - Partial or slightly incorrect SQL statement

cursor - cursor position

Returns:

completion hints that fit at the current cursor position

getCatalogManager

public CatalogManager getCatalogManager()