GS_BLOCKLIST_SQL

GS_BLOCKLIST_SQL records job blocklist and exception information. This table uses sql_hash as the unique index to collect statistics on job exception information and record blocklist information. You can associate GS_BLOCKLIST_SQL with GS_WLM_SESSION_INFO to obtain the query column and execution information of a job.

GaussDB(DWS) also provides the GS_BLOCKLIST_SQL view for querying job blocklist and exception information. This view can directly display the query column. This view depends on GS_WLM_SESSION_INFO. If the GS_WLM_SESSION_INFO table is large, the query may take a long time.

This system catalog is supported only by clusters of version 9.1.0.200 or later.

The schema of the GS_BLOCKLIST_SQL system catalog is dbms_om.
The GS_BLOCKLIST_SQL system catalog can be queried only in the postgres database. If it is queried in other databases, an error is reported.
The GS_BLOCKLIST_SQL system catalog contains unique indexes, which are distributed on DNs in hash mode. The distributed column is sql_hash.
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_SQL columns
Name	Type	Reference	Description
sql_hash	Text	N/A	sql_hash generated based on the query parsing tree.
block_list	Boolean	N/A	Check whether a job is in the blocklist.
except_num	Integer	N/A	Query the number of job exceptions.
except_time	Timestamp	N/A	Query the time when the last job exception occurred.