MergeJoin

MergeJoinExec Struct


// MergeJoinExec implements the merge join algorithm.
// This operator assumes that two iterators of both sides
// will provide required order on join condition:
// 1. For equal-join, one of the join key from each side
// matches the order given.
// 2. For other cases its preferred not to use SMJ and operator
// will throw error.
type MergeJoinExec struct {
    baseExecutor

    stmtCtx      *stmtctx.StatementContext
    compareFuncs []expression.CompareFunc
    joiner       joiner
    isOuterJoin  bool
    desc         bool

    innerTable *mergeJoinTable
    outerTable *mergeJoinTable

    hasMatch bool
    hasNull  bool

    memTracker  *memory.Tracker
    diskTracker *disk.Tracker
}