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# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

SELECT *
FROM a JOIN b ON a.w = b.w
       JOIN c ON a.x = c.x
       JOIN d ON a.y = d.y;
--
SetOperationStatement
+-set_operation_query=SetOperation[set_operation_type=Select]
  +-children=
    +-Select
      +-select_clause=SelectStar
      +-from_clause=
        +-JoinedTable[join_type=InnerJoin]
          +-left_table=JoinedTable[join_type=InnerJoin]
          | +-left_table=JoinedTable[join_type=InnerJoin]
          | | +-left_table=TableReference[table=a]
          | | +-right_table=TableReference[table=b]
          | | +-join_predicate=Equal
          | |   +-left_operand=AttributeReference[attribute_name=w,
          | |   | relation_name=a]
          | |   +-right_operand=AttributeReference[attribute_name=w,
          | |     relation_name=b]
          | +-right_table=TableReference[table=c]
          | +-join_predicate=Equal
          |   +-left_operand=AttributeReference[attribute_name=x,relation_name=a]
          |   +-right_operand=AttributeReference[attribute_name=x,
          |     relation_name=c]
          +-right_table=TableReference[table=d]
          +-join_predicate=Equal
            +-left_operand=AttributeReference[attribute_name=y,relation_name=a]
            +-right_operand=AttributeReference[attribute_name=y,relation_name=d]
==

SELECT *
FROM a AS a1 JOIN b AS b1 ON a1.w = b1.w
             JOIN c AS c1 ON a1.x = c1.x
             JOIN d AS d1 ON a1.y = d1.y;
WHERE a1.x > b1.x
  AND a1.y > c1.y
  AND a1.z > d1.z;
--
SetOperationStatement
+-set_operation_query=SetOperation[set_operation_type=Select]
  +-children=
    +-Select
      +-select_clause=SelectStar
      +-from_clause=
        +-JoinedTable[join_type=InnerJoin]
          +-left_table=JoinedTable[join_type=InnerJoin]
          | +-left_table=JoinedTable[join_type=InnerJoin]
          | | +-left_table=TableReference[table=a]
          | | | +-table_signature=TableSignature[table_alias=a1]
          | | +-right_table=TableReference[table=b]
          | | | +-table_signature=TableSignature[table_alias=b1]
          | | +-join_predicate=Equal
          | |   +-left_operand=AttributeReference[attribute_name=w,
          | |   | relation_name=a1]
          | |   +-right_operand=AttributeReference[attribute_name=w,
          | |     relation_name=b1]
          | +-right_table=TableReference[table=c]
          | | +-table_signature=TableSignature[table_alias=c1]
          | +-join_predicate=Equal
          |   +-left_operand=AttributeReference[attribute_name=x,
          |   | relation_name=a1]
          |   +-right_operand=AttributeReference[attribute_name=x,
          |     relation_name=c1]
          +-right_table=TableReference[table=d]
          | +-table_signature=TableSignature[table_alias=d1]
          +-join_predicate=Equal
            +-left_operand=AttributeReference[attribute_name=y,relation_name=a1]
            +-right_operand=AttributeReference[attribute_name=y,relation_name=d1]
==

SELECT *
FROM a LEFT OUTER JOIN b ON a.w = b.w
       RIGHT OUTER JOIN c ON a.x = c.x
       FULL OUTER JOIN d ON a.y = d.y;
--
SetOperationStatement
+-set_operation_query=SetOperation[set_operation_type=Select]
  +-children=
    +-Select
      +-select_clause=SelectStar
      +-from_clause=
        +-JoinedTable[join_type=FullOuterJoin]
          +-left_table=JoinedTable[join_type=RightOuterJoin]
          | +-left_table=JoinedTable[join_type=LeftOuterJoin]
          | | +-left_table=TableReference[table=a]
          | | +-right_table=TableReference[table=b]
          | | +-join_predicate=Equal
          | |   +-left_operand=AttributeReference[attribute_name=w,
          | |   | relation_name=a]
          | |   +-right_operand=AttributeReference[attribute_name=w,
          | |     relation_name=b]
          | +-right_table=TableReference[table=c]
          | +-join_predicate=Equal
          |   +-left_operand=AttributeReference[attribute_name=x,relation_name=a]
          |   +-right_operand=AttributeReference[attribute_name=x,
          |     relation_name=c]
          +-right_table=TableReference[table=d]
          +-join_predicate=Equal
            +-left_operand=AttributeReference[attribute_name=y,relation_name=a]
            +-right_operand=AttributeReference[attribute_name=y,relation_name=d]
==

SELECT *
FROM a INNER JOIN b ON (a.w = b.w OR a.x > b.y);
--
SetOperationStatement
+-set_operation_query=SetOperation[set_operation_type=Select]
  +-children=
    +-Select
      +-select_clause=SelectStar
      +-from_clause=
        +-JoinedTable[join_type=InnerJoin]
          +-left_table=TableReference[table=a]
          +-right_table=TableReference[table=b]
          +-join_predicate=Or
            +-Equal
            | +-left_operand=AttributeReference[attribute_name=w,relation_name=a]
            | +-right_operand=AttributeReference[attribute_name=w,
            |   relation_name=b]
            +-Greater
              +-left_operand=AttributeReference[attribute_name=x,relation_name=a]
              +-right_operand=AttributeReference[attribute_name=y,
                relation_name=b]
==

SELECT *
FROM b LEFT JOIN c ON b.x = c.x JOIN d ON c.y = d.y;
--
SetOperationStatement
+-set_operation_query=SetOperation[set_operation_type=Select]
  +-children=
    +-Select
      +-select_clause=SelectStar
      +-from_clause=
        +-JoinedTable[join_type=InnerJoin]
          +-left_table=JoinedTable[join_type=LeftOuterJoin]
          | +-left_table=TableReference[table=b]
          | +-right_table=TableReference[table=c]
          | +-join_predicate=Equal
          |   +-left_operand=AttributeReference[attribute_name=x,relation_name=b]
          |   +-right_operand=AttributeReference[attribute_name=x,
          |     relation_name=c]
          +-right_table=TableReference[table=d]
          +-join_predicate=Equal
            +-left_operand=AttributeReference[attribute_name=y,relation_name=c]
            +-right_operand=AttributeReference[attribute_name=y,relation_name=d]
==

SELECT *
FROM b LEFT JOIN (c JOIN d ON c.y = d.y) ON b.x = c.x;
--
SetOperationStatement
+-set_operation_query=SetOperation[set_operation_type=Select]
  +-children=
    +-Select
      +-select_clause=SelectStar
      +-from_clause=
        +-JoinedTable[join_type=LeftOuterJoin]
          +-left_table=TableReference[table=b]
          +-right_table=JoinedTable[join_type=InnerJoin]
          | +-left_table=TableReference[table=c]
          | +-right_table=TableReference[table=d]
          | +-join_predicate=Equal
          |   +-left_operand=AttributeReference[attribute_name=y,relation_name=c]
          |   +-right_operand=AttributeReference[attribute_name=y,
          |     relation_name=d]
          +-join_predicate=Equal
            +-left_operand=AttributeReference[attribute_name=x,relation_name=b]
            +-right_operand=AttributeReference[attribute_name=x,relation_name=c]