Jacky Woo created CALCITE-3220:
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Summary: HiveSqlDialect transform function trim to correct hive
format
Key: CALCITE-3220
URL: https://issues.apache.org/jira/browse/CALCITE-3220
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.19.0
Reporter: Jacky Woo
Let's assume sql = SELECT TRIM(' str ')
When we use HiveSqlDialect and transform "sql", we expect SELECT TRIM(' str
')，but get SELECT TRIM(BOTH ' ' FROM ' str ') which is incorrect sql format in
hive.
So maybe HiveSqlDialect behavior should be changed when transform function trim:
# {{SELECT TRIM(' str ') => SELECT TRIM(' str ') }}
# {{SELECT TRIM(BOTH ' ' from ' str ') => SELECT TRIM(' str ')}}
# {{SELECT TRIM(LEADING ' ' from ' str ') => SELECT LTRIM(' str ')}}
# {{SELECT TRIM(TRAILING ' ' from ' str ')=> SELECT RTRIM(' str ') }}
{{This is the linked github pr #1342}}
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