statements sort_dataset.ts

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100% Branches 1/1

100% Functions 1/1

100% Lines 23/23

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1x import {IStatement} from "./_statement";
import {verNot, seq, alt, opt, plus, optPrio} from "../combi";
import {SourceFieldSymbol, FieldSub, Dynamic} from "../expressions";
import {Version} from "../../../version";
import {IStatementRunnable} from "../statement_runnable";
 
export class SortDataset implements IStatement {
 
  public getMatcher(): IStatementRunnable {
    const order = alt("ASCENDING", "DESCENDING");
 
    const sel = alt(FieldSub, SourceFieldSymbol, Dynamic);
 
    const fields = plus(seq(sel, optPrio(order)));
 
    const by = seq("BY", fields);
 
    const ret = seq("SORT", opt(by));
 
    return verNot(Version.Cloud, ret);
  }
 
}