org.apache.flink.table.planner.expressions.converter

Class ExpressionConverter

java.lang.Object

org.apache.flink.table.planner.expressions.converter.ExpressionConverter

All Implemented Interfaces:

org.apache.flink.table.expressions.ExpressionVisitor<org.apache.calcite.rex.RexNode>

public class ExpressionConverter
extends Object
implements org.apache.flink.table.expressions.ExpressionVisitor<org.apache.calcite.rex.RexNode>

Visit expression to generator RexNode.

Constructor Summary

Constructors

Constructor and Description
ExpressionConverter(org.apache.calcite.tools.RelBuilder relBuilder)

Method Summary

Modifier and Type	Method and Description
static <T> T	extractValue(org.apache.flink.table.expressions.ValueLiteralExpression literal, Class<T> clazz) Extracts a value from a literal.
static List<org.apache.calcite.rex.RexNode>	toRexNodes(CallExpressionConvertRule.ConvertContext context, List<org.apache.flink.table.expressions.Expression> expr)
org.apache.calcite.rex.RexNode	visit(org.apache.flink.table.expressions.CallExpression call)
org.apache.calcite.rex.RexNode	visit(org.apache.flink.table.expressions.Expression other)
org.apache.calcite.rex.RexNode	visit(org.apache.flink.table.expressions.FieldReferenceExpression fieldReference)
org.apache.calcite.rex.RexNode	visit(org.apache.flink.table.expressions.TypeLiteralExpression typeLiteral)
org.apache.calcite.rex.RexNode	visit(org.apache.flink.table.expressions.ValueLiteralExpression valueLiteral)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionConverter

public ExpressionConverter(org.apache.calcite.tools.RelBuilder relBuilder)

Method Detail

visit

public org.apache.calcite.rex.RexNode visit(org.apache.flink.table.expressions.CallExpression call)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<org.apache.calcite.rex.RexNode>

visit

public org.apache.calcite.rex.RexNode visit(org.apache.flink.table.expressions.ValueLiteralExpression valueLiteral)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<org.apache.calcite.rex.RexNode>

visit

public org.apache.calcite.rex.RexNode visit(org.apache.flink.table.expressions.FieldReferenceExpression fieldReference)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<org.apache.calcite.rex.RexNode>

visit

public org.apache.calcite.rex.RexNode visit(org.apache.flink.table.expressions.TypeLiteralExpression typeLiteral)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<org.apache.calcite.rex.RexNode>

visit

public org.apache.calcite.rex.RexNode visit(org.apache.flink.table.expressions.Expression other)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<org.apache.calcite.rex.RexNode>

toRexNodes

public static List<org.apache.calcite.rex.RexNode> toRexNodes(CallExpressionConvertRule.ConvertContext context,
                                                              List<org.apache.flink.table.expressions.Expression> expr)

extractValue

public static <T> T extractValue(org.apache.flink.table.expressions.ValueLiteralExpression literal,
                                 Class<T> clazz)

Extracts a value from a literal. Including planner-specific instances such as DecimalData.