From 83d392af47eb3cc276befb849fc0a64b6962d853 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9s?= <Andrés@DESKTOP-685B185>
Date: Fri, 18 May 2018 09:50:16 +0200
Subject: [PATCH] added informix dbadapter

---
 Respawn/DbAdapter.cs | 95 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)

diff --git a/Respawn/DbAdapter.cs b/Respawn/DbAdapter.cs
index 74f90d4..d00a518 100644
--- a/Respawn/DbAdapter.cs
+++ b/Respawn/DbAdapter.cs
@@ -20,7 +20,102 @@ public static class DbAdapter
         public static readonly IDbAdapter Postgres = new PostgresDbAdapter();
         public static readonly IDbAdapter MySql = new MySqlAdapter();
         public static readonly IDbAdapter Oracle = new OracleDbAdapter();
+        public static readonly IDbAdapter Informix = new InformixDbAdapter();
 
+        private class InformixDbAdapter : IDbAdapter
+        {
+            private const char QuoteCharacter = '"';
+
+            public string BuildTableCommandText(Checkpoint checkpoint)
+            {
+                string commandText = @"SELECT t.owner, t.tabname
+                                       FROM 'informix'.systables t
+                                       WHERE t.tabtype = 'T'
+  	                                    AND t.tabid >= 100";
+
+                if (checkpoint.TablesToIgnore.Any())
+                {
+                    var args = string.Join(",", checkpoint.TablesToIgnore.Select(t => $"'{t}'"));
+
+                    commandText += " AND t.tabname NOT IN (" + args + ")";
+                }
+                if (checkpoint.SchemasToExclude.Any())
+                {
+                    var args = string.Join(",", checkpoint.SchemasToExclude.Select(t => $"'{t}'"));
+
+                    commandText += " AND t.owner NOT IN (" + args + ")";
+                }
+                else if (checkpoint.SchemasToInclude.Any())
+                {
+                    var args = string.Join(",", checkpoint.SchemasToInclude.Select(t => $"'{t}'"));
+
+                    commandText += " AND t.owner IN (" + args + ")";
+                }
+
+                return commandText;
+            }
+
+            public string BuildRelationshipCommandText(Checkpoint checkpoint)
+            {
+                string commandText = @"SELECT T2.owner, T2.tabname, T1.owner, T1.tabname, C.constrname
+                                       FROM sysreferences R
+                                       	INNER JOIN sysconstraints C
+                                       		ON R.constrid = C.constrid
+                                       	INNER JOIN systables T1
+                                       		ON (T1.tabid = R.ptabid) 
+                                       	INNER JOIN systables T2
+                                       		ON T2.tabid = C.tabid
+                                       WHERE C.constrtype = 'R'
+                                       	AND (T1.tabtype = 'T' AND T1.tabid >= 100)
+                                       	AND (T2.tabtype = 'T' AND T2.tabid >= 100)";
+
+                if (checkpoint.TablesToIgnore.Any())
+                {
+                    var args = string.Join(",", checkpoint.TablesToIgnore.Select(t => $"'{t}'"));
+
+                    commandText += " AND T2.tabname NOT IN (" + args + ")";
+                }
+                if (checkpoint.SchemasToExclude.Any())
+                {
+                    var args = string.Join(",", checkpoint.SchemasToExclude.Select(t => $"'{t}'"));
+
+                    commandText += " AND T2.owner NOT IN (" + args + ")";
+                }
+                else if (checkpoint.SchemasToInclude.Any())
+                {
+                    var args = string.Join(",", checkpoint.SchemasToInclude.Select(t => $"'{t}'"));
+
+                    commandText += " AND T2.owner IN (" + args + ")";
+                }
+
+                return commandText;
+            }
+
+            public string BuildDeleteCommandText(GraphBuilder graph)
+            {
+                var builder = new StringBuilder();
+
+                foreach (var table in graph.CyclicalTableRelationships)
+                {
+                    builder.AppendLine($"SET CONSTRAINTS {QuoteCharacter}{table.Name}{QuoteCharacter} DISABLED;");
+                }
+                foreach (var table in graph.ToDelete)
+                {
+                    builder.AppendLine($"DELETE FROM {table.GetFullName(QuoteCharacter)};");
+                }
+                foreach (var table in graph.CyclicalTableRelationships)
+                {
+                    builder.AppendLine($"SET CONSTRAINTS {QuoteCharacter}{table.Name}{QuoteCharacter} ENABLED;");
+                }
+
+                return builder.ToString();
+            }
+
+            public string BuildReseedSql(IEnumerable<Table> tablesToDelete)
+            {
+                throw new System.NotImplementedException();
+            }
+        }
         private class SqlServerDbAdapter : IDbAdapter
         {
             private const char QuoteCharacter = '"';