GS_BLOCKLIST_SQL is used to query job blocklist and exception information. This view is obtained by associating system catalogs GS_BLOCKLIST_SQL and GS_WLM_SESSION_INFO, and deduplicating query results. If the GS_WLM_SESSION_INFO table is large, the query may take a long time.

This view is supported only by 9.1.0.200 and later cluster versions.

The schema stored in the GS_BLOCKLIST_SQL view is pg_catalog.
The GS_BLOCKLIST_SQL view can be queried only in the postgres database. If it is queried in other databases, an error is reported.
Generally, constant values are ignored during sql_hash calculation in DML statements. However, constant values cannot be ignored in DDL, DCL, and parameter setting statements. A sql_hash may correspond to one or more queries.

**Table 1** GS_BLOCKLIST_QUERY columns
Column	Type	Reference	Description
sql_hash	Text	N/A	sql_hash generated based on the query parsing tree.
block_list	Boolean	N/A	Whether a job is in the blocklist.
except_num	Integer	N/A	Number of job exceptions.
except_time	Timestamp	N/A	Time when the last job exception occurred.
query	Text	N/A	Statement to be executed.