/*
M0 SQL Server Schema Export

Ziel:
- Tabellen, Spalten, Defaults, Primary Keys, Foreign Keys, Indizes und Rowcounts
  aus der Legacy-Datenbank exportieren.

Hinweise:
- In der Ziel-Datenbank ausfuehren.
- Ergebnisse als CSV/Excel speichern und nicht mit Produktiv-Secrets ins Repo
  legen.
- Falls nur Kaffeelisten-Tabellen exportiert werden sollen, den WHERE-Block bei
  Bedarf auf kl_% und CoffeeSurvey% begrenzen.
*/

-- 1. Tabellen und Spalten
SELECT
    s.name AS schema_name,
    t.name AS table_name,
    c.column_id,
    c.name AS column_name,
    ty.name AS data_type,
    c.max_length,
    c.precision,
    c.scale,
    c.is_nullable,
    c.is_identity,
    dc.definition AS default_definition,
    ep.value AS column_description
FROM sys.tables t
JOIN sys.schemas s ON s.schema_id = t.schema_id
JOIN sys.columns c ON c.object_id = t.object_id
JOIN sys.types ty ON ty.user_type_id = c.user_type_id
LEFT JOIN sys.default_constraints dc
    ON dc.parent_object_id = t.object_id
   AND dc.parent_column_id = c.column_id
LEFT JOIN sys.extended_properties ep
    ON ep.major_id = t.object_id
   AND ep.minor_id = c.column_id
   AND ep.name = 'MS_Description'
WHERE t.is_ms_shipped = 0
ORDER BY s.name, t.name, c.column_id;

-- 2. Primary Keys und Unique Constraints
SELECT
    s.name AS schema_name,
    t.name AS table_name,
    kc.name AS constraint_name,
    kc.type_desc,
    ic.key_ordinal,
    c.name AS column_name
FROM sys.key_constraints kc
JOIN sys.tables t ON t.object_id = kc.parent_object_id
JOIN sys.schemas s ON s.schema_id = t.schema_id
JOIN sys.index_columns ic
    ON ic.object_id = kc.parent_object_id
   AND ic.index_id = kc.unique_index_id
JOIN sys.columns c
    ON c.object_id = ic.object_id
   AND c.column_id = ic.column_id
ORDER BY s.name, t.name, kc.name, ic.key_ordinal;

-- 3. Foreign Keys
SELECT
    sch_parent.name AS parent_schema,
    parent_t.name AS parent_table,
    parent_c.name AS parent_column,
    fk.name AS foreign_key_name,
    sch_ref.name AS referenced_schema,
    ref_t.name AS referenced_table,
    ref_c.name AS referenced_column,
    fk.delete_referential_action_desc,
    fk.update_referential_action_desc
FROM sys.foreign_keys fk
JOIN sys.foreign_key_columns fkc ON fkc.constraint_object_id = fk.object_id
JOIN sys.tables parent_t ON parent_t.object_id = fkc.parent_object_id
JOIN sys.schemas sch_parent ON sch_parent.schema_id = parent_t.schema_id
JOIN sys.columns parent_c
    ON parent_c.object_id = fkc.parent_object_id
   AND parent_c.column_id = fkc.parent_column_id
JOIN sys.tables ref_t ON ref_t.object_id = fkc.referenced_object_id
JOIN sys.schemas sch_ref ON sch_ref.schema_id = ref_t.schema_id
JOIN sys.columns ref_c
    ON ref_c.object_id = fkc.referenced_object_id
   AND ref_c.column_id = fkc.referenced_column_id
ORDER BY parent_schema, parent_table, foreign_key_name;

-- 4. Indizes
SELECT
    s.name AS schema_name,
    t.name AS table_name,
    i.name AS index_name,
    i.type_desc,
    i.is_unique,
    i.is_primary_key,
    i.is_unique_constraint,
    ic.key_ordinal,
    ic.is_included_column,
    c.name AS column_name
FROM sys.indexes i
JOIN sys.tables t ON t.object_id = i.object_id
JOIN sys.schemas s ON s.schema_id = t.schema_id
JOIN sys.index_columns ic
    ON ic.object_id = i.object_id
   AND ic.index_id = i.index_id
JOIN sys.columns c
    ON c.object_id = ic.object_id
   AND c.column_id = ic.column_id
WHERE t.is_ms_shipped = 0
  AND i.name IS NOT NULL
ORDER BY s.name, t.name, i.name, ic.key_ordinal, ic.index_column_id;

-- 5. Rowcounts
SELECT
    s.name AS schema_name,
    t.name AS table_name,
    SUM(p.row_count) AS row_count
FROM sys.tables t
JOIN sys.schemas s ON s.schema_id = t.schema_id
JOIN sys.dm_db_partition_stats p ON p.object_id = t.object_id
WHERE t.is_ms_shipped = 0
  AND p.index_id IN (0, 1)
GROUP BY s.name, t.name
ORDER BY s.name, t.name;

-- 6. Trigger
SELECT
    s.name AS schema_name,
    t.name AS table_name,
    tr.name AS trigger_name,
    tr.is_disabled,
    OBJECT_DEFINITION(tr.object_id) AS trigger_definition
FROM sys.triggers tr
JOIN sys.tables t ON t.object_id = tr.parent_id
JOIN sys.schemas s ON s.schema_id = t.schema_id
ORDER BY s.name, t.name, tr.name;

-- 7. Stored Procedures und Funktionen mit Kaffeelisten-Bezug
SELECT
    s.name AS schema_name,
    o.name AS object_name,
    o.type_desc,
    OBJECT_DEFINITION(o.object_id) AS object_definition
FROM sys.objects o
JOIN sys.schemas s ON s.schema_id = o.schema_id
WHERE o.type IN ('P', 'FN', 'IF', 'TF')
  AND (
      OBJECT_DEFINITION(o.object_id) LIKE '%kl_%'
      OR OBJECT_DEFINITION(o.object_id) LIKE '%CoffeeSurvey%'
  )
ORDER BY s.name, o.name;