Package org.apache.flink.sql.parser

Class SqlParseUtils

java.lang.Object

org.apache.flink.sql.parser.SqlParseUtils

public class SqlParseUtils
extends Object

Utils methods for parsing DDLs.

Method Summary

Modifier and Type	Method	Description
static <T extends Enum<T>> T	extractEnum(org.apache.calcite.sql.SqlLiteral literal, Class<T> enumClass)
static List<String>	extractList(org.apache.calcite.sql.SqlNodeList sqlNodeList, Function<org.apache.calcite.sql.SqlNode,String> mapper)
static Map<String,String>	extractMap(org.apache.calcite.sql.SqlNodeList propList)
static Set<String>	extractSet(org.apache.calcite.sql.SqlNodeList sqlNodeList, Function<org.apache.calcite.sql.SqlNode,String> mapper)
static String	extractString(org.apache.calcite.sql.SqlLiteral literal)
static String	extractString(org.apache.calcite.sql.SqlNode node)
static LinkedHashMap<String,String>	getPartitionKVs(org.apache.calcite.sql.SqlNodeList partitionSpec)	Get static partition key value pair as strings.

Methods inherited from class java.lang.Object

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

Method Detail

getPartitionKVs

public static LinkedHashMap<String,String> getPartitionKVs(org.apache.calcite.sql.SqlNodeList partitionSpec)

Get static partition key value pair as strings.

For character literals we return the unquoted and unescaped values. For other types we use SqlNode.toString() to get the string format of the value literal.

Returns:

the mapping of column names to values of partition specifications, returns an empty map if there is no partition specifications.

extractString

@Nullable
public static String extractString(@Nullable
                                   org.apache.calcite.sql.SqlLiteral literal)

extractString

@Nullable
public static String extractString(@Nullable
                                   org.apache.calcite.sql.SqlNode node)

extractMap

public static Map<String,String> extractMap(@Nullable
                                                  org.apache.calcite.sql.SqlNodeList propList)

extractList

public static List<String> extractList(@Nullable
                                       org.apache.calcite.sql.SqlNodeList sqlNodeList,
                                       Function<org.apache.calcite.sql.SqlNode,String> mapper)

extractSet

public static Set<String> extractSet(@Nullable
                                     org.apache.calcite.sql.SqlNodeList sqlNodeList,
                                     Function<org.apache.calcite.sql.SqlNode,String> mapper)

extractEnum

@Nullable
public static <T extends Enum<T>> T extractEnum(@Nullable
                                                org.apache.calcite.sql.SqlLiteral literal,
                                                Class<T> enumClass)