PGXC_INSTR_UNIQUE_SQL

PGXC_INSTR_UNIQUE_SQL displays the complete Unique SQL statistics of all CN nodes in the cluster.

Only the system administrator can access this view. The columns in this view are the same as those in the GS_INSTR_UNIQUE_SQL view. For details about columns in the view, see Table 1.

**Table 1** GS_INSTR_UNIQUE_SQL columns
Name	Type	Description
node_name	name	Name of the CN that receives SQL statements
node_id	integer	Node ID, which is the same as the value of node_id in the pgxc_node table
user_name	name	Username
user_id	oid	User ID
unique_sql_id	bigint	Normalized Unique SQL ID
query	text	Normalized SQL text
n_calls	bigint	Number of successful execution times
min_elapse_time	bigint	Minimum running time of the SQL statement in the database (unit: μs)
max_elapse_time	bigint	Maximum running time of SQL statements in the database (unit: μs)
total_elapse_time	bigint	Total running time of SQL statements in the database (unit: μs)
n_returned_rows	bigint	Row activity - Number of rows in the result set returned by the SELECT statement
n_tuples_fetched	bigint	Row activity - Randomly scan rows (column-store tables/foreign tables are not counted.)
n_tuples_returned	bigint	Row activity - Sequential scan rows (Column-store tables/foreign tables are not counted.)
n_tuples_inserted	bigint	Row activity - Inserted rows
n_tuples_updated	bigint	Row activity - Updated rows
n_tuples_deleted	bigint	Row activity - Deleted rows
n_blocks_fetched	bigint	Block access times of the buffer, that is, physical read/I/O
n_blocks_hit	bigint	Block hits of the buffer, that is, logical read/cache
n_soft_parse	bigint	Number of soft parsing times (cache plan)
n_hard_parse	bigint	Number of hard parsing times (generation plan)
db_time	bigint	Valid DB execution time, including the waiting time and network sending time. If multiple threads are involved in query execution, the value of DB_TIME is the sum of DB_TIME of multiple threads (unit: μs).
cpu_time	bigint	CPU execution time, excluding the sleep time (unit: μs)
execution_time	bigint	SQL execution time in the query executor, DDL statements, and statements (such as Copy statements) that are not executed by the executor are not counted (unit: μs).
parse_time	bigint	SQL parsing time (unit: μs)
plan_time	bigint	SQL generation plan time (unit: μs)
rewrite_time	bigint	SQL rewriting time (unit: μs)
pl_execution_time	bigint	Execution time of the plpgsql procedural language function (unit: μs)
pl_compilation_time	bigint	Compilation time of the plpgsql procedural language function (unit: μs)
net_send_time	bigint	Network time, including the time spent by the CN in sending data to the client and the time spent by the DN in sending data to the CN (unit: μs)
data_io_time	bigint	File I/O time (unit: μs)
first_time	timestamp with time zone	Time of the first SQL statement execution
last_time	timestamp with time zone	Time of the last SQL statement execution