expressions sql_source_simple.ts

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1x import {alt, seq, ver, tok, Expression} from "../combi";
import {Version} from "../../../version";
import {WAt, ParenLeftW, WParenRightW} from "../../1_lexer/tokens";
import {Source, SimpleSource3} from ".";
import {IStatementRunnable} from "../statement_runnable";
 
// todo, delete this expression, its the same as SQLSource?
export class SQLSourceSimple extends Expression {
  public getRunnable(): IStatementRunnable {
    const paren = seq(tok(ParenLeftW), Source, tok(WParenRightW));
 
    const at = ver(Version.v740sp05, seq(tok(WAt), alt(SimpleSource3, paren)));
 
    return alt(SimpleSource3, at);
  }
}