gudusoft.gsqlparser.common.structured

Class StructuredSchemaParser

Object

gudusoft.gsqlparser.common.structured.StructuredSchemaParser

public final class StructuredSchemaParser
extends Object

Recursive descent parser for vendor-neutral structured type strings. Currently supports StructuredSchemaDialect.SPARK_SQL_TYPE_STRING:

 type       := primitive | array | struct | map
 array      := ARRAY '<' type '>'
 struct     := STRUCT '<' field (',' field)* '>'
 field      := identifier ':' type
 map        := MAP '<' type ',' type '>'
 primitive  := STRING | INT | BIGINT | DOUBLE | FLOAT | BOOLEAN | DATE
             | TIMESTAMP | DECIMAL ('(' ... ')')? | identifier
 identifier := backquoted_identifier | bare_identifier
 

Inputs may include one layer of surrounding single or double quotes (matching the SQL string literal); they are stripped before parsing, and doubled quotes ('') inside the literal are unescaped to a single quote.

Method Summary

Modifier and Type	Method and Description
static StructuredType	parse(String schemaText, StructuredSchemaDialect dialect)

Methods inherited from class Object

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

Method Detail

parse

public static StructuredType parse(String schemaText,
                                   StructuredSchemaDialect dialect)