如何在 postgresql r2dbc 中获取 select 查询的结果?
How to get results of select query in postgresql r2dbc?
我可以很好地执行此查询,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();
我可以很好地执行此查询,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();