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

Interface CallExpressionConvertRule

All Known Implementing Classes:

CustomizedConvertRule, DirectConvertRule, OverConvertRule, ScalarFunctionConvertRule

public interface CallExpressionConvertRule

Rule to convert CallExpression.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	CallExpressionConvertRule.ConvertContext Context of CallExpressionConvertRule.

Method Summary

Modifier and Type	Method and Description
Optional<org.apache.calcite.rex.RexNode>	convert(CallExpression call, CallExpressionConvertRule.ConvertContext context) Convert call expression with context to RexNode.

Method Detail

convert

Optional<org.apache.calcite.rex.RexNode> convert(CallExpression call,
                                                 CallExpressionConvertRule.ConvertContext context)

Convert call expression with context to RexNode.

Returns:

Success return RexNode of Optional.of(T), Fail return Optional.empty().