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Severity
Low
Description
This warning is shown when a DROP statement from fastload and multiload files is removed. The statement is only removed if the tables that are being dropped are ERRORtables used in a command.
Error tables are specified on fastload and multiload, but they are not needed in snowflake. Since they are created internally when used on these scripts, and not in Snowflake; the reference would not be resolved when dropping them.
Code Example
Input Code:
DROP TABLE FastTable;
DROP TABLE Error1;
DROP TABLE Error2;
CREATE TABLE FastTable, NO FALLBACK
( ID INTEGER, UFACTOR INTEGER, MISC CHAR(42))
PRIMARY INDEX(ID);
DEFINE ID (INTEGER), UFACTOR (INTEGER), MISC (CHAR(42))
FILE=FileName;
SHOW;
BEGIN LOADING FastTable ERRORFILES Error1,Error2
CHECKPOINT 10000;
INSERT INTO FastTable (ID, UFACTOR, MISC) VALUES
(:ID, :MISC);
END LOADING;
Output Code:
snowconvert_helpers.execute_sql_statement("""DROP TABLE PUBLIC.FastTable""", con)
#** MSC-WARNING - MSCEWI2022 - COMMENTED OUT CODE RELATED WITH DROPPING WORK OR ERROR TABLE.
#DROP TABLE Error1 **
#** MSC-WARNING - MSCEWI2022 - COMMENTED OUT CODE RELATED WITH DROPPING WORK OR ERROR TABLE.
#DROP TABLE Error2 **
snowconvert_helpers.execute_sql_statement("""CREATE TABLE PUBLIC.FastTable
(
ID INTEGER,
UFACTOR INTEGER,
MISC CHAR(42))""", con)
#** MSC-WARNING - MSCEWI2020 - REMOVED NEXT STATEMENT, NOT APPLICABLE IN SNOWFLAKE. DEFINE ID (INTEGER), UFACTOR (INTEGER), MISC (CHAR(42))
# FILE=FileName **
#** MSC-WARNING - MSCEWI2020 - REMOVED NEXT STATEMENT, NOT APPLICABLE IN SNOWFLAKE. SHOW **
snowconvert_helpers.execute_sql_statement("""COPY INTO FastTable FROM {} ON_ERROR = CONTINUE""".format(inputDataPlaceholder))
sql = """CREATE TABLE CTE_FastTable AS SELECT DISTINCT * FROM FastTable"""
snowconvert_helpers.execute_sql_statement(sql, con)
sql = """DROP TABLE FastTable"""
snowconvert_helpers.execute_sql_statement(sql, con)
sql = """ ALTER TABLE CTE_FastTable RENAME TO FastTable"""
snowconvert_helpers.execute_sql_statement(sql, con)
#** MSC-WARNING - MSCEWI2020 - REMOVED NEXT STATEMENT, NOT APPLICABLE IN SNOWFLAKE. END LOADING **
Recommendations
Functional equivalence is not affected by removing DROP statements applied to error tables, is just an informative warning.
