org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander Class Reference

Inheritance diagram for org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander:

Collaboration diagram for org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander:

Public Member Functions
SqlNode	visit (SqlCall call)
SqlNode	visit (SqlIdentifier id)
Public Member Functions inherited from org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationModifier
SqlNode	go (SqlNode node)

Package Functions
	NavigationExpander ()
	NavigationExpander (SqlOperator operator, SqlNode offset)

Package Attributes
final SqlOperator	op
final SqlNode	offset

Detailed Description

Shuttle that expands navigation expressions in a MATCH_RECOGNIZE clause.

Examples:

• PREV(A.price + A.amount) 

  →

  PREV(A.price) + PREV(A.amount) 

• FIRST(A.price * 2) 

  →

  FIRST(A.PRICE) * 2 

Definition at line 6316 of file SqlValidatorImpl.java.

Constructor & Destructor Documentation

org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.NavigationExpander ( )

inlinepackage

Definition at line 6320 of file SqlValidatorImpl.java.

Referenced by org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.visit().

                         {
      this(null, null);
    }

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org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.NavigationExpander ( SqlOperator  operator, SqlNode  offset  )

inlinepackage

Definition at line 6324 of file SqlValidatorImpl.java.

References org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.offset.

                                                             {
      this.offset = offset;
      this.op = operator;
    }

Member Function Documentation

SqlNode org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.visit ( SqlCall  call )

inline

Definition at line 6329 of file SqlValidatorImpl.java.

References org.apache.calcite.sql.validate.SqlValidatorImpl.isLogicalNavigation(), org.apache.calcite.sql.validate.SqlValidatorImpl.isPhysicalNavigation(), org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.NavigationExpander(), org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.offset, and org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.op.

                                                 {
      SqlKind kind = call.getKind();
      List<SqlNode> operands = call.getOperandList();
      List<SqlNode> newOperands = new ArrayList<>();

      if (call.getFunctionQuantifier() != null
          && call.getFunctionQuantifier().getValue() == SqlSelectKeyword.DISTINCT) {
        final SqlParserPos pos = call.getParserPosition();
        throw SqlUtil.newContextException(pos,
            Static.RESOURCE.functionQuantifierNotAllowed(call.toString()));
      }

      if (isLogicalNavigation(kind) || isPhysicalNavigation(kind)) {
        SqlNode inner = operands.get(0);
        SqlNode offset = operands.get(1);

        // merge two straight prev/next, update offset
        if (isPhysicalNavigation(kind)) {
          SqlKind innerKind = inner.getKind();
          if (isPhysicalNavigation(innerKind)) {
            List<SqlNode> innerOperands = ((SqlCall) inner).getOperandList();
            SqlNode innerOffset = innerOperands.get(1);
            SqlOperator newOperator = innerKind == kind
                ? SqlStdOperatorTable.PLUS : SqlStdOperatorTable.MINUS;
            offset = newOperator.createCall(SqlParserPos.ZERO,
              offset, innerOffset);
            inner = call.getOperator().createCall(SqlParserPos.ZERO,
              innerOperands.get(0), offset);
          }
        }
        SqlNode newInnerNode =
            inner.accept(new NavigationExpander(call.getOperator(), offset));
        if (op != null) {
          newInnerNode = op.createCall(SqlParserPos.ZERO, newInnerNode,
              this.offset);
        }
        return newInnerNode;
      }

      if (operands.size() > 0) {
        for (SqlNode node : operands) {
          if (node != null) {
            SqlNode newNode = node.accept(new NavigationExpander());
            if (op != null) {
              newNode = op.createCall(SqlParserPos.ZERO, newNode, offset);
            }
            newOperands.add(newNode);
          } else {
            newOperands.add(null);
          }
        }
        return call.getOperator().createCall(SqlParserPos.ZERO, newOperands);
      } else {
        if (op == null) {
          return call;
        } else {
          return op.createCall(SqlParserPos.ZERO, call, offset);
        }
      }
    }

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SqlNode org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.visit ( SqlIdentifier  id )

inline

Definition at line 6390 of file SqlValidatorImpl.java.

References org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.offset, and org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.op.

                                                     {
      if (op == null) {
        return id;
      } else {
        return op.createCall(SqlParserPos.ZERO, id, offset);
      }
    }

Member Data Documentation

final SqlNode org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.offset

package

Definition at line 6318 of file SqlValidatorImpl.java.

Referenced by org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.NavigationExpander(), and org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.visit().

final SqlOperator org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.op

package

Definition at line 6317 of file SqlValidatorImpl.java.

Referenced by org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander.visit().

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The documentation for this class was generated from the following file:

• /home/jenkins-slave/workspace/core-os-doxygen/java/calcite/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java