org.apache.flink.table.planner.calcite

Class SqlExprToRexConverterImpl

java.lang.Object

org.apache.flink.table.planner.calcite.SqlExprToRexConverterImpl

All Implemented Interfaces:

SqlExprToRexConverter

public class SqlExprToRexConverterImpl
extends Object
implements SqlExprToRexConverter

Standard implementation of SqlExprToRexConverter.

Constructor Summary

Constructors

Constructor and Description
SqlExprToRexConverterImpl(org.apache.calcite.tools.FrameworkConfig config, org.apache.flink.table.planner.calcite.FlinkTypeFactory typeFactory, org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.sql.SqlDialect sqlDialect, org.apache.calcite.rel.type.RelDataType inputRowType, org.apache.calcite.rel.type.RelDataType outputType)

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.rex.RexNode	convertToRexNode(String expr) Converts a SQL expression to a RexNode expression.
org.apache.calcite.rex.RexNode[]	convertToRexNodes(String[] exprs) Converts an array of SQL expressions to an array of RexNode expressions.
String	expand(String expr) Converts the given SQL expression string to an expanded string with fully qualified function calls and escaped identifiers.

Methods inherited from class java.lang.Object

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

Constructor Detail

SqlExprToRexConverterImpl

public SqlExprToRexConverterImpl(org.apache.calcite.tools.FrameworkConfig config,
                                 org.apache.flink.table.planner.calcite.FlinkTypeFactory typeFactory,
                                 org.apache.calcite.plan.RelOptCluster cluster,
                                 org.apache.calcite.sql.SqlDialect sqlDialect,
                                 org.apache.calcite.rel.type.RelDataType inputRowType,
                                 @Nullable
                                 org.apache.calcite.rel.type.RelDataType outputType)

Method Detail

expand

public String expand(String expr)

Description copied from interface: SqlExprToRexConverter

Converts the given SQL expression string to an expanded string with fully qualified function calls and escaped identifiers.

E.g. my_udf(f0) + 1 to `my_catalog`.`my_database`.`my_udf`(`f0`) + 1

Specified by:

expand in interface SqlExprToRexConverter

convertToRexNode

public org.apache.calcite.rex.RexNode convertToRexNode(String expr)

Description copied from interface: SqlExprToRexConverter

Converts a SQL expression to a RexNode expression.

Specified by:

convertToRexNode in interface SqlExprToRexConverter

Parameters:

expr - a SQL expression e.g. `my_catalog`.`my_database`.`my_udf`(`f0`) + 1

convertToRexNodes

public org.apache.calcite.rex.RexNode[] convertToRexNodes(String[] exprs)

Description copied from interface: SqlExprToRexConverter

Converts an array of SQL expressions to an array of RexNode expressions.

Specified by:

convertToRexNodes in interface SqlExprToRexConverter

Parameters:

exprs - a SQL expression e.g. `my_catalog`.`my_database`.`my_udf`(`f0`) + 1