org.apache.flink.connector.jdbc.table

Class JdbcFilterPushdownPreparedStatementVisitor

java.lang.Object

org.apache.flink.table.expressions.ExpressionDefaultVisitor<Optional<ParameterizedPredicate>>

org.apache.flink.connector.jdbc.table.JdbcFilterPushdownPreparedStatementVisitor

All Implemented Interfaces:

org.apache.flink.table.expressions.ExpressionVisitor<Optional<ParameterizedPredicate>>

@Experimental
public class JdbcFilterPushdownPreparedStatementVisitor
extends org.apache.flink.table.expressions.ExpressionDefaultVisitor<Optional<ParameterizedPredicate>>

Visitor that convert Expression to ParameterizedPredicate. Return Optional.empty() if we cannot push down the filter.

Constructor Summary

Constructors

Constructor and Description
JdbcFilterPushdownPreparedStatementVisitor(java.util.function.Function<String,String> quoteIdentifierFunction)

Method Summary

Modifier and Type	Method and Description
protected Optional<ParameterizedPredicate>	defaultMethod(org.apache.flink.table.expressions.Expression expression)
Optional<ParameterizedPredicate>	visit(org.apache.flink.table.expressions.CallExpression call)
Optional<ParameterizedPredicate>	visit(org.apache.flink.table.expressions.FieldReferenceExpression fieldReference)
Optional<ParameterizedPredicate>	visit(org.apache.flink.table.expressions.ValueLiteralExpression litExp)

Methods inherited from class org.apache.flink.table.expressions.ExpressionDefaultVisitor

visit, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

JdbcFilterPushdownPreparedStatementVisitor

public JdbcFilterPushdownPreparedStatementVisitor(java.util.function.Function<String,String> quoteIdentifierFunction)

Method Detail

visit

public Optional<ParameterizedPredicate> visit(org.apache.flink.table.expressions.CallExpression call)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<Optional<ParameterizedPredicate>>

Overrides:

visit in class org.apache.flink.table.expressions.ExpressionDefaultVisitor<Optional<ParameterizedPredicate>>

visit

public Optional<ParameterizedPredicate> visit(org.apache.flink.table.expressions.ValueLiteralExpression litExp)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<Optional<ParameterizedPredicate>>

Overrides:

visit in class org.apache.flink.table.expressions.ExpressionDefaultVisitor<Optional<ParameterizedPredicate>>

visit

public Optional<ParameterizedPredicate> visit(org.apache.flink.table.expressions.FieldReferenceExpression fieldReference)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<Optional<ParameterizedPredicate>>

Overrides:

visit in class org.apache.flink.table.expressions.ExpressionDefaultVisitor<Optional<ParameterizedPredicate>>

defaultMethod

protected Optional<ParameterizedPredicate> defaultMethod(org.apache.flink.table.expressions.Expression expression)

Specified by:

defaultMethod in class org.apache.flink.table.expressions.ExpressionDefaultVisitor<Optional<ParameterizedPredicate>>