org.apache.calcite.sql2rel.StandardConvertletTable.TimestampAddConvertlet Class Reference

Inheritance diagram for org.apache.calcite.sql2rel.StandardConvertletTable.TimestampAddConvertlet:

Collaboration diagram for org.apache.calcite.sql2rel.StandardConvertletTable.TimestampAddConvertlet:

Public Member Functions
RexNode	convertCall (SqlRexContext cx, SqlCall call)

Detailed Description

Convertlet that handles the

TIMESTAMPADD 

function.

Definition at line 1394 of file StandardConvertletTable.java.

Member Function Documentation

RexNode org.apache.calcite.sql2rel.StandardConvertletTable.TimestampAddConvertlet.convertCall ( SqlRexContext  cx, SqlCall  call  )

inline

Definition at line 1395 of file StandardConvertletTable.java.

                                                               {
      // TIMESTAMPADD(unit, count, timestamp)
      //  => timestamp + count * INTERVAL '1' UNIT
      final RexBuilder rexBuilder = cx.getRexBuilder();
      final SqlLiteral unitLiteral = call.operand(0);
      final TimeUnit unit = unitLiteral.symbolValue(TimeUnit.class);
      RexNode interval2Add;
      SqlIntervalQualifier qualifier =
              new SqlIntervalQualifier(unit, null, unitLiteral.getParserPosition());
      RexNode op1 = cx.convertExpression(call.operand(1));
      switch (unit) {
        case MICROSECOND:
        case NANOSECOND:
          interval2Add = divide(rexBuilder,
                  multiply(rexBuilder,
                          rexBuilder.makeIntervalLiteral(BigDecimal.ONE, qualifier),
                          op1),
                  BigDecimal.ONE.divide(unit.multiplier, RoundingMode.UNNECESSARY));
          break;
        default:
          interval2Add = multiply(rexBuilder,
                  rexBuilder.makeIntervalLiteral(unit.multiplier, qualifier),
                  op1);
      }

      return rexBuilder.makeCall(SqlStdOperatorTable.DATETIME_PLUS,
              cx.convertExpression(call.operand(2)),
              interval2Add);
    }

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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/sql2rel/StandardConvertletTable.java