def validate_and_route_query(self, txn, sql, query_id, sql_backend):
m = re.search(r"^\s*select\s+", sql, flags=re.IGNORECASE)
if m == None:
# Process a non-select statement.
return self.process_non_select(txn, sql, query_id, sql_backend)
# Process a select statement.
return sql_backend.do_select(txn, sql)
def validate_and_route_query(self, txn, sql, query_id, sql_backend):
m = re.search(r"^\s*select\s+", sql, flags=re.IGNORECASE)
if m == None:
# Process a non-select statement.
return self.process_non_select(txn, sql, query_id, sql_backend)
# Process a select statement.
return sql_backend.do_select(txn, sql)
def validate_and_route_query(self, txn, sql, query_id, sql_backend):
# So when dbs rotate we'll force a shutdown of the backend
# after a certain amount of time to avoid hung or long running
# things in this code path from holding dbs open. This
# may/will invalidate references we might have in here so wrap
# it all in a try catch...
try:
m = re.search(r"^\s*select\s+", sql, flags=re.IGNORECASE)
if m == None:
# Process a non-select statement.
return self.process_non_select(txn, sql, query_id, sql_backend)
# Process a select statement.
return sql_backend.do_select(txn, sql)
except Exception as e:
msg = "Exception in validate_and_route_query: {}".format(str(e))
logging.info(msg)
return {"retval": 0, "error_message": msg}
def validate_and_route_query(self, txn, sql, query_id, sql_backend):
# So when dbs rotate we'll force a shutdown of the backend
# after a certain amount of time to avoid hung or long running
# things in this code path from holding dbs open. This
# may/will invalidate references we might have in here so wrap
# it all in a try catch...
try:
m = re.search(r"^\s*select\s+", sql, flags=re.IGNORECASE)
if m == None:
# Process a non-select statement.
return self.process_non_select(txn, sql, query_id, sql_backend)
# Process a select statement.
return sql_backend.do_select(txn, sql)
except Exception as e:
msg = "Exception in validate_and_route_query: {}".format(str(e))
logging.info(msg)
return { "retval" : 0, "error_message" : msg }
def process_non_select(self, txn, sql, query_id, sql_backend):
"""
Called for non-select statements like show tables and desc.
"""
# DESC?
m = re.search(r"^\s*desc\s+(\S+)\s*;$", sql, flags=re.IGNORECASE)
if m != None:
(retval, error_message,
table) = sql_backend.do_desc(txn, m.group(1))
result = {"retval": retval}
if error_message:
result["error_message"] = error_message
if table:
result["data"] = table
return result
# DESC VIEW?
m = re.search(r"^\s*desc\s+view\s+(\S+)\s*;$",
sql,
flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(
txn,
"SELECT view FROM qasino_server_views WHERE viewname = '%s';" %
m.group(1))
# SHOW tables?
m = re.search(r"^\s*show\s+tables\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(
txn,
"SELECT *, strftime('%Y-%m-%d %H:%M:%f UTC', last_update_epoch, 'unixepoch') last_update_datetime FROM qasino_server_tables ORDER BY tablename;"
)
# SHOW tables with LIKE?
m = re.search(r"^\s*show\s+tables\s+like\s+('\S+')\s*;$",
sql,
flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(
txn,
"SELECT *, strftime('%Y-%m-%d %H:%M:%f UTC', last_update_epoch, 'unixepoch') last_update_datetime FROM qasino_server_tables WHERE tablename LIKE {} ORDER BY tablename;"
.format(m.group(1)))
# SHOW connections?
m = re.search(r"^\s*show\s+connections\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(
txn,
"SELECT *, strftime('%Y-%m-%d %H:%M:%f UTC', last_update_epoch, 'unixepoch') last_update_datetime FROM qasino_server_connections ORDER BY identity;"
)
# SHOW info?
m = re.search(r"^\s*show\s+info\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(
txn,
"SELECT *, strftime('%Y-%m-%d %H:%M:%f UTC', generation_start_epoch, 'unixepoch') generation_start_datetime FROM qasino_server_info;"
)
# SHOW views?
m = re.search(r"^\s*show\s+views\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(
txn,
"SELECT viewname, loaded, errormsg FROM qasino_server_views ORDER BY viewname;"
)
# Exit?
m = re.search(r"^\s*(quit|logout|exit)\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return {"retval": 0, "error_message": "Bye!"}
return {
"retval": 1,
"error_message": "ERROR: Unrecognized statement: %s" % sql
}
def process_non_select(self, txn, sql, query_id, sql_backend):
"""
Called for non-select statements like show tables and desc.
"""
# DESC?
m = re.search(r"^\s*desc\s+(\S+)\s*;$", sql, flags=re.IGNORECASE)
if m != None:
(retval, error_message, table) = sql_backend.do_desc(txn, m.group(1))
result = { "retval" : retval }
if error_message:
result["error_message"] = error_message
if table:
result["data"] = table
return result
# DESC VIEW?
m = re.search(r"^\s*desc\s+view\s+(\S+)\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(txn, "SELECT view FROM qasino_server_views WHERE viewname = '%s';" % m.group(1))
# SHOW tables?
m = re.search(r"^\s*show\s+tables\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(txn, "SELECT *, strftime('%Y-%m-%d %H:%M:%f UTC', last_update_epoch, 'unixepoch') last_update_datetime FROM qasino_server_tables ORDER BY tablename;")
# SHOW tables with LIKE?
m = re.search(r"^\s*show\s+tables\s+like\s+('\S+')\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(txn, "SELECT *, strftime('%Y-%m-%d %H:%M:%f UTC', last_update_epoch, 'unixepoch') last_update_datetime FROM qasino_server_tables WHERE tablename LIKE {} ORDER BY tablename;".format(m.group(1)) )
# SHOW connections?
m = re.search(r"^\s*show\s+connections\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(txn, "SELECT *, strftime('%Y-%m-%d %H:%M:%f UTC', last_update_epoch, 'unixepoch') last_update_datetime FROM qasino_server_connections ORDER BY identity;")
# SHOW info?
m = re.search(r"^\s*show\s+info\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(txn, "SELECT *, strftime('%Y-%m-%d %H:%M:%f UTC', generation_start_epoch, 'unixepoch') generation_start_datetime FROM qasino_server_info;")
# SHOW views?
m = re.search(r"^\s*show\s+views\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return sql_backend.do_select(txn, "SELECT viewname, loaded, errormsg FROM qasino_server_views ORDER BY viewname;")
# Exit?
m = re.search(r"^\s*(quit|logout|exit)\s*;$", sql, flags=re.IGNORECASE)
if m != None:
return { "retval" : 0, "error_message" : "Bye!" }
return { "retval" : 1, "error_message" : "ERROR: Unrecognized statement: %s" % sql }
