Cast expressions (with TRY_CAST)
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
The standard SQL CAST expression will error when a value cannot be cast to the target data type.
Some dialects allow for ignoring such errors, returning NULL instead. This can be useful when sanitising data that is not well structured.
SELECT TRY_CAST("a", INTEGER)
create.select(tryCast("a", INTEGER)).fetch();
Dialect support
This example using jOOQ:
tryCast("a", VARCHAR(10))
Translates to the following dialect specific expressions:
BigQuery
safe_cast('a' AS string)
ClickHouse
accurateCastOrNull('a', 'Nullable(String(10))')
DuckDB, SQLDataWarehouse, SQLServer, Snowflake, Trino
try_cast('a' AS varchar(10))
Oracle
CAST('a' AS varchar2(10) DEFAULT NULL ON CONVERSION ERROR)
ASE, Access, Aurora MySQL, Aurora Postgres, CockroachDB, DB2, Derby, Exasol, Firebird, H2, HSQLDB, Hana, Informix, MariaDB, MemSQL, MySQL, Postgres, Redshift, SQLite, Sybase, Teradata, Vertica, YugabyteDB
/* UNSUPPORTED */
(These are currently generated with jOOQ 3.20, see #10141), or translate your own on our website
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