Commit 0f02d5dc authored by terrymanu's avatar terrymanu
Browse files

support simple sub-query

parent 177b5013

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/statement/select/AbstractSelectParser.java

+9 −2
Original line number Diff line number Diff line
@@ -269,8 +269,15 @@ public abstract class AbstractSelectParser implements SQLStatementParser { 
    }

    

    public void parseTable() {

        if (sqlParser.equalAny(Symbol.LEFT_PAREN)) {

            throw new UnsupportedOperationException("Cannot support subquery");

        if (sqlParser.skipIfEqual(Symbol.LEFT_PAREN)) {

            if (!selectStatement.getTables().isEmpty()) {

                throw new UnsupportedOperationException("Cannot support subquery for nested tables.");

            }

            query();

            sqlParser.accept(Symbol.RIGHT_PAREN);

            if (sqlParser.equalAny(Assist.END)) {

                return;

            }

        }

        parseTableFactor();

        parseJoinTable();

sharding-jdbc-core/src/test/resources/com/dangdang/ddframe/rdb/sharding/parsing/parser/dialect/mysql/statement/select_limit.xml

+1 −2
Original line number Diff line number Diff line
@@ -21,11 +21,10 @@ 
        <limit offset="4" row-count="5" offset-index="-1" row-count-index="-1" />

    </assert>

    

    <!-- // TODO subquery

    <assert id="assertSubSelectForLimit" sql="SELECT * FROM (select * from order where num = 1 LIMIT 5,4)" expected-sql="SELECT * FROM (SELECT * FROM [Token(order)] WHERE num = 1 LIMIT 5, 4 )">

        <tables>

            <table name="order" />

        </tables>

        <limit offset="5" row-count="4" offset-index="-1" row-count-index="-1" />

    </assert>

    -->

</asserts>