To see the delete row counts schema wise and projection wise: Vsql=> select counter_name, avg(counter_value) as Avg_Counter_Value from dc_execution_engine_profiles where transaction_id= and statement_id= and operator_name='Join' group by counter_name order by avg(counter_value) desc ĥ. Once we have the run time values for all the operators, we can drill down a particular operator to see the individual counter values. Vsql=> select operator_name, avg(counter_value) as Avg_Time_Per_Counter from dc_execution_engine_profiles where transaction_id= and statement_id= and counter_name='execution time (us)' group by operator_name order by avg(counter_value) desc To see the run time of various execution engine operators: Vsql=> select transaction_id, statement_id, thread_count, open_file_handle_count, memory_inuse_kb/1024 memory_inuse_mb from resource_acquisitions where is_executing='t' limit 10 Ĥ. To see the resources acquired by running queries: Vsql=> select ri.time as Start_Time, rc.time as End_Time,rc.time - ri.time as Query_Duration, ri.request as Query from dc_requests_issued ri, dc_requests_completed rc where ri.session_id = rc.session_id and ri.request_id = rc.request_id and ri.request like '%my_table%' order by ri.time desc limit 10 ģ. Vsql=> select ri.time as Start_Time, rc.time as End_Time,rc.time - ri.time as Query_Duration, ri.request as Query from dc_requests_issued ri, dc_requests_completed rc where ri.session_id = rc.session_id and ri.request_id = rc.request_id and ri.transaction_id= and ri.statement_id= Vsql=> select user_name, session_id, transaction_id, statement_id, request, request_duration_ms, start_timestamp from query_requests where request ilike '%my_table%' order by start_timestamp desc limit 10 Or we can filter on particular request(s): Vsql=> select user_name, session_id, transaction_id, statement_id, request, request_duration_ms, start_timestamp from query_requests where transaction_id= and statement_id= To get the run time for a particular query: Vsql=> select user_name, session_id, transaction_id, statement_id, query,query_duration_us, query_start from query_profiles where is_executing='t' Ģ. "query_requests" is a system view built over few system tables, but this is only available in Vertica 6.0 and above. Vsql=> select user_name, session_id, transaction_id, statement_id, request, request_duration_ms, start_timestamp from query_requests where is_executing='t' order by start_timestamp desc To see all the queries currently running: All spaces in the regular expression to be matched in strings must be escaped with a backslash ( \).1. Comments start with hash ( #) and end with a newline ( \n). The x modifier causes the function to ignore all un-escaped space characters and comments in the regular expression. operator matches any character except a newline.Īdd comments to regular expressions. Without the m modifier, the start and end of line operators match only the start and end of the string. Using this modifier, the start of line ( ^) and end of line ( $) regular expression operators match line breaks ( \n) within the string. Treat the string to match as multiple lines. Treat strings as binary octets, rather than UTF-8 characters. One or more single-character flags that modify how the regular expression pattern is matched to string-expression: The regular expression must conform with Perl regular expression syntax. The regular expression to match against string-expression. If string-expression is in the _raw_ column of a flex or columnar table, cast the string to a LONG VARCHAR before searching for pattern.
The VARCHAR or LONG VARCHAR expression to evaluate for matches with the regular expression specified in pattern. Syntax REGEXP_LIKE ( string-expression, pattern. If you port a regular expression query from an Oracle database, remember that Oracle considers a zero-length string to be equivalent to NULL, while Vertica does not.
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