getDiffSummaryNodeFromDelta(ctx *sql.Context, delta diff.TableDelta, fromRoot, toRoot *doltdb.RootValue, tableName string)
: (diffSummaryNode, bool, error)
getDiffSummary(ctx *sql.Context, td diff.TableDelta)
: (diff.DiffSummaryProgress, bool, bool, error)
getRowFromDiffSummary(tblName string, dsp diff.DiffSummaryProgress, newColLen, oldColLen int, keyless bool)
: sql.Row