org.apache.flink.cdc.runtime.parser

类 TransformParser

java.lang.Object

org.apache.flink.cdc.runtime.parser.TransformParser

public class TransformParser
extends Object

Use Flink's calcite parser to parse the statement of flink cdc pipeline transform.

构造器概要

构造器

构造器和说明
TransformParser()

方法概要

限定符和类型	方法和说明
static List<ProjectionColumn>	generateProjectionColumns(String projectionExpression, List<org.apache.flink.cdc.common.schema.Column> columns, List<UserDefinedFunctionDescriptor> udfDescriptors, org.apache.flink.cdc.common.source.SupportedMetadataColumn[] supportedMetadataColumns)
static List<org.apache.flink.cdc.common.schema.Column>	generateReferencedColumns(String projectionExpression, String filterExpression, List<org.apache.flink.cdc.common.schema.Column> columns)
static boolean	hasAsterisk(String projection)
static String	normalizeFilter(String projection, String filter)
static List<String>	parseComputedColumnNames(String projection, org.apache.flink.cdc.common.source.SupportedMetadataColumn[] supportedMetadataColumns)
static List<String>	parseFilterColumnNameList(String filterExpression)
static org.apache.calcite.sql.SqlSelect	parseFilterExpression(String filterExpression)
static org.apache.calcite.sql.SqlSelect	parseSelect(String statement)
static ProjectionColumn	resolveProjectionColumnFromIdentifier(Map<String,org.apache.calcite.rel.type.RelDataType> relDataTypeMap, Map<String,org.apache.flink.cdc.common.schema.Column> originalColumnMap, String identifier, String projectedColumnName, org.apache.flink.cdc.common.source.SupportedMetadataColumn[] supportedMetadataColumns) Create a projection column from a simple identifier node (could be an upstream physical column or a metadata column).
static org.apache.calcite.sql.SqlNode	rewriteExpression(org.apache.calcite.sql.SqlNode sqlNode, Map<String,org.apache.calcite.sql.SqlNode> replaceMap)
static String	translateFilterExpressionToJaninoExpression(String filterExpression, List<UserDefinedFunctionDescriptor> udfDescriptors)

从类继承的方法 java.lang.Object

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

构造器详细资料

TransformParser

public TransformParser()

方法详细资料

parseSelect

public static org.apache.calcite.sql.SqlSelect parseSelect(String statement)

generateReferencedColumns

public static List<org.apache.flink.cdc.common.schema.Column> generateReferencedColumns(String projectionExpression,
                                                                                        @Nullable
                                                                                        String filterExpression,
                                                                                        List<org.apache.flink.cdc.common.schema.Column> columns)

generateProjectionColumns

public static List<ProjectionColumn> generateProjectionColumns(String projectionExpression,
                                                               List<org.apache.flink.cdc.common.schema.Column> columns,
                                                               List<UserDefinedFunctionDescriptor> udfDescriptors,
                                                               org.apache.flink.cdc.common.source.SupportedMetadataColumn[] supportedMetadataColumns)

resolveProjectionColumnFromIdentifier

public static ProjectionColumn resolveProjectionColumnFromIdentifier(Map<String,org.apache.calcite.rel.type.RelDataType> relDataTypeMap,
                                                                     Map<String,org.apache.flink.cdc.common.schema.Column> originalColumnMap,
                                                                     String identifier,
                                                                     String projectedColumnName,
                                                                     org.apache.flink.cdc.common.source.SupportedMetadataColumn[] supportedMetadataColumns)

Create a projection column from a simple identifier node (could be an upstream physical column or a metadata column).

translateFilterExpressionToJaninoExpression

public static String translateFilterExpressionToJaninoExpression(String filterExpression,
                                                                 List<UserDefinedFunctionDescriptor> udfDescriptors)

parseComputedColumnNames

public static List<String> parseComputedColumnNames(String projection,
                                                    org.apache.flink.cdc.common.source.SupportedMetadataColumn[] supportedMetadataColumns)

parseFilterColumnNameList

public static List<String> parseFilterColumnNameList(String filterExpression)

parseFilterExpression

public static org.apache.calcite.sql.SqlSelect parseFilterExpression(String filterExpression)

rewriteExpression

public static org.apache.calcite.sql.SqlNode rewriteExpression(org.apache.calcite.sql.SqlNode sqlNode,
                                                               Map<String,org.apache.calcite.sql.SqlNode> replaceMap)

normalizeFilter

public static String normalizeFilter(String projection,
                                     String filter)

hasAsterisk

public static boolean hasAsterisk(@Nullable
                                  String projection)