Apache Calcite-似乎无法解析DDL语句

时间:2018-12-16 09:38:07

标签: apache-calcite

以下是我用来解析MySQL语句的配置。我能够很好地解析和处理DML语句,但似乎无法解析任何DDL语句(CREATE TABLE,ALTER TABLE,DROP TABLE等)。

public static SqlNode parse(String query) {
    SqlParser.Config sqlParserConfig = SqlParser.configBuilder()
        .setConformance(SqlConformanceEnum.MYSQL_5)
        .setLex(Lex.MYSQL)
        .build();

    SqlParser parser = SqlParser.create(query, sqlParserConfig);

    try {
        return parser.parseStmt();
    } catch (SqlParseException e) {
        lastErrorMessage = e.getMessage();
        return null;
    }
}

当我尝试解析CREATE TABLE语句时,它给我以下错误消息。

Encountered "ALTER TABLE" at line 1, column 1.
Was expecting one of:
    "SET" ...
    "RESET" ...
    "ALTER" "SYSTEM" ...
    "ALTER" "SESSION" ...
    "WITH" ...
    "+" ...
    "-" ...
    "NOT" ...
    "EXISTS" ...
    <UNSIGNED_INTEGER_LITERAL> ...
    <DECIMAL_NUMERIC_LITERAL> ...
    <APPROX_NUMERIC_LITERAL> ...
    <BINARY_STRING_LITERAL> ...
    <PREFIXED_STRING_LITERAL> ...
    <QUOTED_STRING> ...
    <UNICODE_STRING_LITERAL> ...
... 

我可以在库中看到类似SqlAlterSqlCreateSqlDrop之类的类。有没有其他解析DDL的方法?

我正在使用1.17.0版本。

1 个答案:

答案 0 :(得分:0)

我认为您只是缺少适当的解析器工厂。请尝试以下操作:

SqlParser.Config sqlParserConfig = SqlParser.configBuilder()
    .setParserFactory(SqlDdlParserImpl.FACTORY)
    .setConformance(SqlConformanceEnum.MYSQL_5)
    .setLex(Lex.MYSQL)
    .build();

SqlParser parser = SqlParser.create(query, sqlParserConfig);