zh from stage.fs_zh_cdfispad; 36396887 54.7s 37528247 3.2s 17x 代 码 转 换 功 能 测 试 select count(coalesce(zh,'')) as zh from stage.fs_zh_cdfispad; 36396887 43.8s 37528247 1.5s 28x select count(cast(zfje

Postgres Planner : For some queries that perform a FULL JOIN using a subselect that contains a COALESCE function, Greenplum Database returned "ERROR: could not find hash distribution key expressions an equality predicate and the equality predicate contains a function, for example coalesce(tbl1.a, '999999') = coalesce(tbl2.a, '999999'). The performance issue was caused by inaccurate cardinality estimates rats') @@ to_tsquery('fat & rat'); ?column? ---------- t Note: In these example queries, coalesce should be used to prevent a single NULL attribute from causing a NULL result for the whole document

Postgres Planner : For some queries that perform a FULL JOIN using a subselect that contains a COALESCE function, Greenplum Database returned "ERROR: could not find hash distribution key expressions an equality predicate and the equality predicate contains a function, for example coalesce(tbl1.a, '999999') = coalesce(tbl2.a, '999999'). The performance issue was caused by inaccurate cardinality estimates rats') @@ to_tsquery('fat & rat'); ?column? ---------- t Note: In these example queries, coalesce should be used to prevent a single NULL attribute from causing a NULL result for the whole document

Postgres Planner : For some queries that perform a FULL JOIN using a subselect that contains a COALESCE function, Greenplum Database returned "ERROR: could not find hash distribution key expressions an equality predicate and the equality predicate contains a function, for example coalesce(tbl1.a, '999999') = coalesce(tbl2.a, '999999'). The performance issue was caused by inaccurate cardinality estimates document FROM messages m, docs d WHERE mid = did AND mid = 12; Note: In these example queries, coalesce should be used to prevent a single NULL attribute from causing a NULL result for the whole document

10315 Postgres Planner For some queries that perform a FULL JOIN using a subselect that contains a COALESCE function, Greenplum Database returned "ERROR: could not find hash distribution key expressions an equality predicate and the equality predicate contains a function, for example coalesce(tbl1.a, '999999') = coalesce(tbl2.a, '999999'). The performance issue was caused by inaccurate cardinality estimates to_tsvector('fat cats ate fat rats') @@ to_tsquery('fat & rat'); ?column? Note In these example queries, coalesce should be used to prevent a single NULL attribute from causing a NULL result for the whole document

10315 Postgres Planner For some queries that perform a FULL JOIN using a subselect that contains a COALESCE function, Greenplum Database returned "ERROR: could not find hash distribution key expressions an equality predicate and the equality predicate contains a function, for example coalesce(tbl1.a, '999999') = coalesce(tbl2.a, '999999'). The performance issue was caused by inaccurate cardinality estimates document FROM messages m, docs d WHERE mid = did AND mid = 12; Note: In these example queries, coalesce should be used to prevent a single NULL attribute from causing a NULL result for the whole document

10315 Postgres Planner For some queries that perform a FULL JOIN using a subselect that contains a COALESCE function, Greenplum Database returned "ERROR: could not find hash distribution key expressions an equality predicate and the equality predicate contains a function, for example coalesce(tbl1.a, '999999') = coalesce(tbl2.a, '999999'). The performance issue was caused by inaccurate cardinality estimates NOT operators. (For details see.) There are functions to_tsquery Note In these example queries, coalesce should be used to prevent a single NULL attribute from causing a NULL result for the whole document

10315 Postgres Planner For some queries that perform a FULL JOIN using a subselect that contains a COALESCE function, Greenplum Database returned "ERROR: could not find hash distribution key expressions an equality predicate and the equality predicate contains a function, for example coalesce(tbl1.a, '999999') = coalesce(tbl2.a, '999999'). The performance issue was caused by inaccurate cardinality estimates document FROM messages m, docs d WHERE mid = did AND mid = 12; Note: In these example queries, coalesce should be used to prevent a single NULL attribute from causing a NULL result for the whole document

10315 Postgres Planner For some queries that perform a FULL JOIN using a subselect that contains a COALESCE function, Greenplum Database returned "ERROR: could not find hash distribution key expressions an equality predicate and the equality predicate contains a function, for example coalesce(tbl1.a, '999999') = coalesce(tbl2.a, '999999'). The performance issue was caused by inaccurate cardinality estimates document FROM messages m, docs d WHERE mid = did AND mid = 12; Note: In these example queries, coalesce should be used to prevent a single NULL attribute from causing a NULL result for the whole document

10315 Postgres Planner For some queries that perform a FULL JOIN using a subselect that contains a COALESCE function, Greenplum Database returned "ERROR: could not find hash distribution key expressions an equality predicate and the equality predicate contains a function, for example coalesce(tbl1.a, '999999') = coalesce(tbl2.a, '999999'). The performance issue was caused by inaccurate cardinality estimates to_tsvector('fat cats ate fat rats') @@ to_tsquery('fat & rat'); ?column? Note In these example queries, coalesce should be used to prevent a single NULL attribute from causing a NULL result for the whole document