*/ while (heap_compute_data_size(tupleDesc, toast_values, toast_isnull) > maxDataLen) { int biggest_attno; biggest_attno = toast_tuple_find_biggest_attribute(&ttc, true, false);//这里的for compression参数是true if (biggest_attno < 0) break; /* * Attempt to compress it inline, if...
column …]]} [OR {INSERT | DELETE | UPDATE [OF column [, column …]]}...] ON [schema.] view_name --只能定义在视图上 [REFERENCING {OLD [AS] old | NEW [AS] new| PARENT as parent}] [FOR EACH ROW ] --因为INSTEAD OF触发器只能在行级上触发,所以没有必要指定 [WHEN condition...
Snapshot in Parallel: Data moved in chunks (schema or table) Change Data Capture (Replication): Data loaded continuously. For approaches 1 and 2, we need application downtime because data is being written one time from Oracle to Postgres, whereas in approach 3 data is lo...
where table_schema = 'public' --<< ch...
public' # schema names #default_tablespace = '' # a tablespace name, '' uses the default #temp_tablespaces = '' # a list of tablespace names, '' uses # only default tablespace #check_function_bodies = on #default_transaction_isolation = 'read committed' #default_transaction_read_only =...
GRANT pg_monitor to postgres_exporter;版本<10的pg,只执行下面的SQLCREATE SCHEMA IF NOT EXISTS postgres_exporter;GRANT USAGE ON SCHEMA postgres_exporter TO postgres_exporter;CREATE OR REPLACE FUNCTION get_pg_stat_activity() RETURNS SETOF pg_stat_activity AS$$ SELECT * FROM pg_catalog.pg_stat_...
{RANGEVAR :schemaname <> :relname student :inh true :relpersistence p :alias {ALIAS :aliasname st :colnames <> } :location 41 } {JOINEXPR :jointype 0 :isNatural false :larg {RANGEVAR :schemaname <> :relname course :inh true :relpersistence p :alias {ALIAS :aliasname c :colnames ...
ALTER FOREIGN TABLE CREATE COLLATION DROP CAST IMPORT FOREIGN SCHEMA ALTER FUNCTION CREATE CONVERSION DROP COLLATION INSERT ALTER GROUP CREATE DATABASE DROP CONVERSION LISTEN ALTER INDEX CREATE DOMAIN DROP DATABASE LOAD ALTER LANGUAGE CREATE EVENT TRIGGER DROP DOMAIN LOCK ...
For Postgres Pro 15 or higher: BEGIN; CREATE ROLE backup WITH LOGIN; GRANT USAGE ON SCHEMA pg_catalog TO backup; GRANT EXECUTE ON FUNCTION pg_catalog.current_setting(text) TO backup; GRANT EXECUTE ON FUNCTION pg_catalog.set_config(text, text, boolean) TO backup; GRANT EXECUTE ON FUNCTION...
new SimpleStringSchema(), properties ); // 添加Kafka源到Flink环境中 DataStream<String> kafkaStream = env.addSource(kafkaSource); // 将Kafka消息转换为元组或其他适合JDBC插入的数据结构 DataStream<Tuple2<String, String>> transformedStream = kafkaStream.map(new MapFunction<String, Tuple2<String, Strin...