[英]How to get results of select query in postgresql r2dbc?
I can execute this query just fine but I don't know how to extract the information returned by the select statement.我可以很好地执行这个查询,但我不知道如何提取 select 语句返回的信息。
Flux<PostgresqlResult> checkTableQuery = connectionMono.flatMapMany(connection -> connection
.createStatement("select exists(\n" +
" select table_name from information_schema.tables\n" +
" where table_name='sequence1'\n" +
");")
.execute());
checkTableQuery.subscribe();
Flux<PostgresqlResult> checkTableQuery = connectionMono.flatMapMany(connection -> connection
.createStatement("select exists(\n" +
" select table_name from information_schema.tables\n" +
" where table_name='sequence1'\n" +
");")
.execute()).flatmap(result->result.map(Row,RowMetadata)->Row.get("exists",Boolean.class)));
checkTableQuery.subscribe();
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