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-rw-r--r--mssql/custom/custom.sql42
1 files changed, 42 insertions, 0 deletions
diff --git a/mssql/custom/custom.sql b/mssql/custom/custom.sql
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+/* This file contains helper functions.
+ */
+
+IF OBJECT_ID('dbo.variant_to_string', 'FN') IS NOT NULL
+ DROP FUNCTION dbo.variant_to_string;
+GO
+
+IF OBJECT_ID('dbo.string_to_variant', 'FN') IS NOT NULL
+ DROP FUNCTION dbo.string_to_variant;
+GO
+
+CREATE FUNCTION dbo.variant_to_string (@val SQL_VARIANT) RETURNS VARCHAR(max)
+AS
+BEGIN
+ RETURN CAST(SQL_VARIANT_PROPERTY(@val, 'BaseType') AS SYSNAME) + ' ' +
+ CAST(@val AS VARCHAR(max))
+END;
+GO
+
+CREATE FUNCTION dbo.string_to_variant (@val VARCHAR(max)) RETURNS SQL_VARIANT
+AS
+BEGIN
+ DECLARE @ret SQL_VARIANT
+
+ DECLARE @pos BIGINT
+ DECLARE @vtype SYSNAME
+ DECLARE @vtext VARCHAR(max)
+
+ SET @pos = CHARINDEX(' ', @val)
+ SET @vtype = SUBSTRING(@val, 1, @pos - 1)
+ SET @vtext = SUBSTRING(@val, @pos + 1, LEN(@val))
+
+ IF @vtype = 'tinyint' SET @ret = CAST(@vtext AS TINYINT)
+ ELSE IF @vtype = 'smallint' SET @ret = CAST(@vtext AS SMALLINT)
+ ELSE IF @vtype = 'int' SET @ret = CAST(@vtext AS INT)
+ ELSE IF @vtype = 'bigint' SET @ret = CAST(@vtext AS BIGINT)
+ ELSE IF @vtype = 'char' SET @ret = CAST(@vtext AS CHAR(8000))
+ ELSE IF @vtype = 'varchar' SET @ret = CAST(@vtext AS VARCHAR(8000))
+
+ RETURN @ret
+END;
+GO