进程接收客户端的请求，处理并返回结果。当然，响应需要经过 libpq 库的处理 基本查询流程 Query Dispatcher 当 client 向 Master 发起查询请求时，Master 节点上的 postmaster 进程将会 fork 出⼀个⼦进程，叫做 Query Dispatcher（分发 器），简称为 QD 进程 QD 进程会对收到的查询请求进⾏处理，包括解析原始查询语句、优

were being created when zstd compression was in use. 15143 Resolves an issue where the query dispatcher remained idle in transaction for a parallel retrieve cursor even when the query executor had reported setting statement_mem to a value greater than max_statement_mem. 15152 : Enhances logging for dispatcher liveness checks to provide more descriptive error messages. 15016 : Resolves an issue where the EXTENSION WITH SCHEMA failed because VMware Greenplum did not set up the search_path on both the Query Dispatcher and the Query Executor before executing the extension script. Query Processing 32302 : Prevents

setting statement_mem to a value greater than max_statement_mem. 15152 Enhances logging for dispatcher liveness checks to provide more descriptive error messages. 15016 Resolves an issue where the EXTENSION WITH SCHEMA failed because Tanzu Greenplum did not set up the search_path on both the Query Dispatcher and the Query Executor before executing the extension script. Query Processing 32302 Prevents interfaces. Log messages that are generated for connection checks between the Query Executor and Query Dispatcher now include the error number that was generated by the receiver. Greenplum Database introduces

setting statement_mem to a value greater than max_statement_mem. 15152 : Enhances logging for dispatcher liveness checks to provide more descriptive error messages. 15016 : Resolves an issue where the EXTENSION WITH SCHEMA failed because VMware Greenplum did not set up the search_path on both the Query Dispatcher and the Query Executor before executing the extension script. Query Processing 32302 : Prevents interfaces. Log messages that are generated for connection checks between the Query Executor and Query Dispatcher now include the error number that was generated by the receiver. Greenplum Database introduces

expanding each leaf partition separately, in parallel. 12975 : Resolves an issue where the Query Dispatcher failed when it encountered an error processing nextval() and subsequently cancelled all unfinished gp_dispatch_keepalives_interval. You can use these parameters to tune TCP keepalives between a Query Dispatcher and its Query Executors. Greenplum 6.19.0 includes commits from PostgreSQL releases 9.4.24 to issue has been fixed by adding new GUCs to tune TCP keepalives for connections between the Query Dispatcher and Query Executors: gp_dispatch_keepalives_count, gp_dispatch_keepalives_idle, and gp_dispat

expanding each leaf partition separately, in parallel. 12975 : Resolves an issue where the Query Dispatcher failed when it encountered an error processing nextval() and subsequently cancelled all unfinished gp_dispatch_keepalives_interval. You can use these parameters to tune TCP keepalives between a Query Dispatcher and its Query Executors. Greenplum 6.19.0 includes commits from PostgreSQL releases 9.4.24 to issue has been fixed by adding new GUCs to tune TCP keepalives for connections between the Query Dispatcher and Query Executors: gp_dispatch_keepalives_count, gp_dispatch_keepalives_idle, and gp_dispat

EXTENSION WITH SCHEMA failed because Tanzu Greenplum did not set up the search_path on both the Query Dispatcher and the Query Executor before executing the extension script. Query Processing 32302 Prevents interfaces. Log messages that are generated for connection checks between the Query Executor and Query Dispatcher now include the error number that was generated by the receiver. Greenplum Database introduces expanding each leaf partition separately, in parallel. 12975 Resolves an issue where the Query Dispatcher failed when it encountered an error processing nextval() and subsequently cancelled all unfinished

EXTENSION WITH SCHEMA failed because Tanzu Greenplum did not set up the search_path on both the Query Dispatcher and the Query Executor before executing the extension script. Query Processing 32302 Prevents interfaces. Log messages that are generated for connection checks between the Query Executor and Query Dispatcher now include the error number that was generated by the receiver. Greenplum Database introduces expanding each leaf partition separately, in parallel. 12975 Resolves an issue where the Query Dispatcher failed when it encountered an error processing nextval() and subsequently cancelled all unfinished

EXTENSION WITH SCHEMA failed because Tanzu Greenplum did not set up the search_path on both the Query Dispatcher and the Query Executor before executing the extension script. VMware Tanzu Greenplum 6 Documentation interfaces. Log messages that are generated for connection checks between the Query Executor and Query Dispatcher now include the error number that was generated by the receiver. Greenplum Database introduces expanding each leaf partition separately, in parallel. 12975 Resolves an issue where the Query Dispatcher failed when it encountered an error processing nextval() and subsequently cancelled all unfinished

[filter] rules = ['foo*.*', 'bar*.*'] [[sink.dispatchers]] matcher = ['db1.*', 'db2.*', 'db3.*'] dispatcher = 'ts' 13.7.9.2 Syntax 13.7.9.2.1 Plain table names Each table filter rule consists of a “schema sent to the default topic. • For tables that match the matcher rule but do not specify a topic dispatcher, the corresponding data changes are sent to the default topic specified in --sink-uri. For example is sent to the default topic. Topic dispatchers You can use topic = “xxx” to specify a Topic dispatcher and use topic expressions to implement flexible topic dispatching policies. It is recommended that