org.apache.flink.table.planner.calcite

Interface SqlExprToRexConverter

All Known Implementing Classes:

SqlExprToRexConverterImpl

@Internal
public interface SqlExprToRexConverter

Converts SQL expressions to RexNode.

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.

Method Detail

expand

String expand(String expr)

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

convertToRexNode

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

Converts a SQL expression to a RexNode expression.

Parameters:

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

convertToRexNodes

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

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

Parameters:

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