All files / src/abap/2_statements/statements delete_internal.ts

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import {IStatement} from "./_statement";
import {seq, alt, opt, optPrio, per, plus, altPrio} from "../combi";
import {Target, Source, Dynamic, ComponentCompare, ComponentCond, SimpleName, FieldSub, FieldOffset, FieldLength} from "../expressions";
import {IStatementRunnable} from "../statement_runnable";
 
export class DeleteInternal implements IStatement {
 
  public getMatcher(): IStatementRunnable {
// todo, is READ and DELETE similar? something can be reused?
    const index = seq("INDEX", Source);
 
    const keyName = altPrio(SimpleName, Dynamic);
    const using = seq("USING KEY", keyName);
 
    const from = optPrio(seq("FROM", Source));
 
    const fromTo = seq(from,
                       optPrio(seq("TO", Source)));
 
    const where = seq("WHERE", alt(ComponentCond, Dynamic));
 
    const key = seq("WITH TABLE KEY",
                    opt(seq(keyName, "COMPONENTS")),
                    plus(ComponentCompare));
 
    const table = seq("TABLE",
                      Target,
                      alt(per(index, using), from, key));
 
    const other = seq(Target,
                      alt(per(index, using), fromTo, key), opt(where));
 
    const f = seq(FieldSub, optPrio(FieldOffset), optPrio(FieldLength));
 
    const adjacent = seq("ADJACENT DUPLICATES FROM",
                         Target,
                         optPrio(using),
                         opt(seq("COMPARING", altPrio("ALL FIELDS", plus(altPrio(f, Dynamic))))),
                         optPrio(using));
 
    return seq("DELETE", alt(table, adjacent, other));
  }
 
}