Package com.twilio.kudu.sql.rules

Class RowValueExpressionConverter

  • All Implemented Interfaces:
    org.apache.calcite.rex.RexVisitor<org.apache.calcite.rex.RexNode>
    public class RowValueExpressionConverter
extends org.apache.calcite.rex.RexShuttle
    Used to paginate through rows in the order of the primary key columns by comparing row expressions with a greater than operator If the the PK of the table is (A asc, B asc, C asc) (A, B, C) > ('a1', 'b1', * 'c1') is transformed to (A > 'a1') OR ((A = 'a1') AND (B > 'b1')) OR ((A = 'a1') AND (B = 'b1') AND (C > 'c1')) If the the PK of the table is (A asc, B desc, C asc) (A, B, C) > ('a1', 'b1', 'c1') is transformed to (A > 'a1') OR ((A = 'a1') AND (B < 'b1')) OR ((A = 'a1') AND (B = 'b1') AND (C > 'c1')) This implementation is different from the SQL-92 standard see https://stackoverflow.com/questions/32981903/sql-syntax-term-for-where-col1-col2-val1-val2/32982077#32982077

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      org.apache.calcite.rex.RexNode visitCall​(org.apache.calcite.rex.RexCall call)  

      • Methods inherited from class org.apache.calcite.rex.RexShuttle

        apply, apply, mutate, visitArray, visitCorrelVariable, visitDynamicParam, visitFieldAccess, visitFieldCollations, visitInputRef, visitList, visitLiteral, visitLocalRef, visitOver, visitPatternFieldRef, visitRangeRef, visitSubQuery, visitTableInputRef, visitWindow

      • Methods inherited from interface org.apache.calcite.rex.RexVisitor

        visitEach, visitList, visitList

    • Constructor Detail

      • RowValueExpressionConverter

        public RowValueExpressionConverter​(org.apache.calcite.rex.RexBuilder rexBuilder,
                                   CalciteKuduTable calciteKuduTable)

    • Method Detail

      • visitCall

        public org.apache.calcite.rex.RexNode visitCall​(org.apache.calcite.rex.RexCall call)
        Specified by:
        visitCall in interface org.apache.calcite.rex.RexVisitor<org.apache.calcite.rex.RexNode>
        Overrides:
        visitCall in class org.apache.calcite.rex.RexShuttle