Data in Tables using PGP 367 Encrypting gpfdist Connections 370 Tuning SQL Queries 372 How to Generate Explain Plans 372 How to Read Explain Plans 373 Optimizing Greenplum Queries 375 Greenplum Grouping performance by supporting query plan generation for ordered aggregates. You can configure GPORCA to generate query plans for ordered aggregates by setting the new optimizer_enable_orderedagg server configuration Query Optimizer generated a plan for a query that included a subquery ALL construct that could generate incorrect results or crash during execution. 31986 : Resolves an issue where a query crashed during

Data in Tables using PGP 1216 Encrypting gpfdist Connections 1220 Tuning SQL Queries 1221 How to Generate Explain Plans 1221 How to Read Explain Plans 1222 Optimizing Greenplum Queries 1224 Greenplum external tables. 32523, 32314 Resolved an issue where Greenplum Database might drop packets and generate interconnect errors due to incorrect cache eviction logic on remote peer shutdown. 32367 Resolved the empty vector and produces a correct query plan. 32505 Resolved an issue where GPORCA did not generate a performant plan when the query included an N-ary join with only inner joins, and the predicate

Data in Tables using PGP 1278 Encrypting gpfdist Connections 1282 Tuning SQL Queries 1283 How to Generate Explain Plans 1284 How to Read Explain Plans 1284 VMware Greenplum 6 Documentation VMware by an issue where GPORCA generated incorrect results when using set returning functions, such as a generate_series or an inner sub-query. 6641 VMware Greenplum 6 Documentation VMware by Broadcom 156 Resolves correct mode (execute). Data Flow 15625 Resolves an issue where COPY ... FROM lost data and did not generate an error when the number of columns in the receiving table was less than the number of fields in

Data in Tables using PGP 1246 Encrypting gpfdist Connections 1250 Tuning SQL Queries 1251 How to Generate Explain Plans 1252 How to Read Explain Plans 1252 Optimizing Greenplum Queries 1254 Greenplum an issue where GPORCA generated incorrect results when using set returning functions, such as a generate_series or an inner sub-query. 6641 Resolves a bug that caused a query with range type to fail correct mode (execute). Data Flow 15625 Resolves an issue where COPY ... FROM lost data and did not generate an error when the number of columns in the receiving table was less than the number of fields in

Data in Tables using PGP 1261 Encrypting gpfdist Connections 1264 Tuning SQL Queries 1265 How to Generate Explain Plans 1266 How to Read Explain Plans 1266 Optimizing Greenplum Queries 1269 Greenplum provides an efficient nanosecond-precision timestamp data type. uuid-ossp, which provides functions to generate universally unique identifiers (UUIDs). Version 6.23.0 introduces the following new server configuration external tables. 32523, 32314 Resolved an issue where Greenplum Database might drop packets and generate interconnect errors due to incorrect cache eviction logic on remote peer shutdown. 32367 Resolved

Data in Tables using PGP 1221 Encrypting gpfdist Connections 1224 Tuning SQL Queries 1226 How to Generate Explain Plans 1226 How to Read Explain Plans 1226 Optimizing Greenplum Queries 1229 Greenplum provides an efficient nanosecond-precision timestamp data type. uuid-ossp, which provides functions to generate universally unique identifiers (UUIDs). Version 6.23.0 introduces the following new server configuration external tables. 32523, 32314 Resolved an issue where Greenplum Database might drop packets and generate interconnect errors due to incorrect cache eviction logic on remote peer shutdown. 32367 Resolved

Data in Tables using PGP 1059 Encrypting gpfdist Connections 1062 Tuning SQL Queries 1064 How to Generate Explain Plans 1064 How to Read Explain Plans 1065 Optimizing Greenplum Queries 1067 Greenplum Example: CREATE TABLE intarr_tbl (a int, arr int[]); INSERT INTO intarr_tbl SELECT i, array[i, i] FROM generate_series(1, 5)i; INSERT INTO intarr_tbl SELECT 6, ‘{6, NULL}’::int[]; INSERT INTO intarr_tbl SELECT most-common-value (MCV) extended statistics compute the correlation ratio and number of distinct values to generate better plans for queries that test several non- uniformly-distributed columns. This feature is

into t1 select generate_series(1,1000000),generate_series(1,1000000),generate_series (1,1000000); insert into t2 select generate_series(1,1000000),generate_series(1,1000000),generate_series (1,1000000); 1000000); insert into t3 select generate_series(1,100),generate_series(1,100),generate_series(1,100); GP的执行计划 tangdb=# explain select count(*) from t1; QUERY

Data in Tables using PGP 1068 Encrypting gpfdist Connections 1071 Tuning SQL Queries 1072 How to Generate Explain Plans 1072 How to Read Explain Plans 1073 Optimizing Greenplum Queries 1075 Greenplum performance by supporting query plan generation for ordered aggregates. You can configure GPORCA to generate query plans for ordered aggregates by setting the new optimizer_enable_orderedagg server configuration Query Optimizer generated a plan for a query that included a subquery ALL construct that could generate incorrect results or crash during execution. 31986 Resolves an issue where a query crashed during

PGP 372 Encrypting gpfdist Connections 375 Tuning SQL Queries 377 Tuning SQL Queries 0 How to Generate Explain Plans 377 How to Read Explain Plans 378 Optimizing Greenplum Queries 380 Greenplum Grouping Query Optimizer generated a plan for a query that included a subquery ALL construct that could generate incorrect results or crash during execution. 31986 : Resolves an issue where a query crashed during was causing performance regression. 180418263 : Removes a stale assertion that caused GPORCA to generate different plans when running Greenplum Database with and without asserts. 180467007 : Resolves