expressions sql_options.ts

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  import {alt, seq, Expression, ver, optPrio, per} from "../combi";
import {Release} from "../../../version";
import {IStatementRunnable} from "../statement_runnable";
import {SQLSourceSimple} from "./sql_source_simple";
import {DatabaseConnection, SQLBypassingBuffer, SQLPrivilegedAccess} from ".";
 
export class SQLOptions extends Expression {
  public getRunnable(): IStatementRunnable {
    const usingClients = alt(seq("CLIENTS IN", alt(SQLSourceSimple, "T000")),
                             "ALL CLIENTS",
                             seq("CLIENT", SQLSourceSimple));
 
    const privilegedAccess = SQLPrivilegedAccess;
 
    const general = per(privilegedAccess, SQLBypassingBuffer, DatabaseConnection);
 
    const usingClause = seq("USING", usingClients, optPrio(general));
 
    return ver(Release.v796, seq("OPTIONS", alt(usingClause, general)));
  }
}