ALTER TABLE .. DROP COLUMN IF EXISTS
适用于 ✅ 开源版 ✅ 专业版 ✅ 企业版
alterTable("t").dropIfExists("c")
翻译成以下特定方言的表达式
Aurora Postgres, CockroachDB, DuckDB, Exasol, H2, MariaDB, Postgres, Teradata, YugabyteDB
ALTER TABLE t DROP IF EXISTS c
BigQuery, ClickHouse, Databricks, Trino
ALTER TABLE t DROP COLUMN IF EXISTS c
DB2
BEGIN
DECLARE CONTINUE HANDLER FOR SQLSTATE '42703' BEGIN END;
DECLARE CONTINUE HANDLER FOR SQLSTATE '42704' BEGIN END;
EXECUTE IMMEDIATE '
ALTER TABLE t DROP c
';
END
Firebird
EXECUTE BLOCK
AS
BEGIN
EXECUTE STATEMENT '
ALTER TABLE t DROP c
';
WHEN sqlcode -607 DO
BEGIN END
END
Hana
DO BEGIN
DECLARE EXIT HANDLER FOR SQL_ERROR_CODE 257 BEGIN END;
DECLARE EXIT HANDLER FOR SQL_ERROR_CODE 260 BEGIN END;
DECLARE EXIT HANDLER FOR SQL_ERROR_CODE 397 BEGIN END;
EXECUTE IMMEDIATE '
ALTER TABLE t DROP (c)
';
END;
Oracle
BEGIN
EXECUTE IMMEDIATE '
ALTER TABLE t DROP COLUMN c
';
EXCEPTION
WHEN others THEN
IF sqlerrm LIKE 'ORA-00904%' THEN NULL;
ELSIF sqlerrm LIKE 'ORA-02443%' THEN NULL;
ELSE RAISE;
END IF;
END;
SQLDataWarehouse
BEGIN TRY
EXEC sp_executesql N'
ALTER TABLE t DROP COLUMN c
';
END TRY
BEGIN CATCH
IF error_number() NOT IN (4924, 3728, 3727, 1750, 15248) BEGIN
DECLARE @ErrorMessage NVARCHAR(4000) = ERROR_MESSAGE();
DECLARE @ErrorSeverity INT = ERROR_SEVERITY();
DECLARE @ErrorState INT = ERROR_STATE();
RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState);
END;
END CATCH
SQLServer
BEGIN TRY
EXEC sp_executesql N'
ALTER TABLE t DROP COLUMN c
';
END TRY
BEGIN CATCH
IF error_number() NOT IN (4924, 3728, 3727, 1750, 15248) THROW;
END CATCH
ASE, Access, Aurora MySQL, Derby, HSQLDB, Informix, MemSQL, MySQL, Redshift, SQLite, Snowflake, Sybase, Vertica
/* UNSUPPORTED */
使用 jOOQ 3.21 生成。早期 jOOQ 版本的支持可能有所不同。 在我们的网站上翻译您自己的 SQL
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