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make DescribeTable compatible with MSSQL 2016 #81

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make DescribeTable compatible with MSSQL 2016 #81

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55 changes: 30 additions & 25 deletions MssqlMcp/dotnet/MssqlMcp/Tools/DescribeTable.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -64,31 +64,36 @@ FROM sys.key_constraints kc


const string ForeignKeyInformation = @"SELECT
fk.name AS name,
SCHEMA_NAME(tp.schema_id) AS [schema],
tp.name AS table_name,
STRING_AGG(cp.name, ', ') WITHIN GROUP (ORDER BY fkc.constraint_column_id) AS column_names,
SCHEMA_NAME(tr.schema_id) AS referenced_schema,
tr.name AS referenced_table,
STRING_AGG(cr.name, ', ') WITHIN GROUP (ORDER BY fkc.constraint_column_id) AS referenced_column_names
FROM
sys.foreign_keys AS fk
JOIN
sys.foreign_key_columns AS fkc ON fk.object_id = fkc.constraint_object_id
JOIN
sys.tables AS tp ON fkc.parent_object_id = tp.object_id
JOIN
sys.columns AS cp ON fkc.parent_object_id = cp.object_id AND fkc.parent_column_id = cp.column_id
JOIN
sys.tables AS tr ON fkc.referenced_object_id = tr.object_id
JOIN
sys.columns AS cr ON fkc.referenced_object_id = cr.object_id AND fkc.referenced_column_id = cr.column_id
WHERE
( SCHEMA_NAME(tp.schema_id) = @TableSchema OR @TableSchema IS NULL )
AND tp.name = @TableName
GROUP BY
fk.name, tp.schema_id, tp.name, tr.schema_id, tr.name;
";
fk.name,
SCHEMA_NAME(pt.schema_id) AS [schema],
pt.name AS table_name,
STUFF( (
SELECT N', ' + cp.name
FROM sys.foreign_key_columns AS fkc
JOIN sys.columns AS cp
ON cp.object_id = fkc.parent_object_id
AND cp.column_id = fkc.parent_column_id
WHERE fkc.constraint_object_id = fk.object_id
ORDER BY fkc.constraint_column_id
FOR XML PATH(''), TYPE
).value('.', 'nvarchar(max)'), 1, 2, '') AS column_names,
SCHEMA_NAME(rt.schema_id) AS referenced_schema,
rt.name AS referenced_table,
STUFF( (
SELECT N', ' + cp.name
FROM sys.foreign_key_columns AS fkc
JOIN sys.columns AS cp
ON cp.object_id = fkc.referenced_object_id
AND cp.column_id = fkc.referenced_column_id
WHERE fkc.constraint_object_id = fk.object_id
ORDER BY fkc.constraint_column_id
FOR XML PATH(''), TYPE
).value('.', 'nvarchar(max)'), 1, 2, '') AS referenced_column_names
FROM sys.foreign_keys AS fk
JOIN sys.tables AS pt ON pt.object_id = fk.parent_object_id
JOIN sys.tables AS rt ON rt.object_id = fk.referenced_object_id
WHERE ( SCHEMA_NAME(pt.schema_id) = @TableSchema OR @TableSchema IS NULL ) AND pt.name = @TableName";

var conn = await _connectionFactory.GetOpenConnectionAsync();
try
{
Expand Down