example and README

README.md

@@ -50,8 +50,9 @@ Example
 #!/usr/bin/env rdmd
 
 import dpq2;
-import std.stdio: writeln;
 import std.getopt;
+import std.stdio: writeln;
+import std.typecons: Nullable;
 import vibe.data.bson;
 
 void main(string[] args)
@@ -95,6 +96,7 @@ void main(string[] args)
     );
 
     auto r = conn.execParams(p);
+    scope(exit) destroy(r);
 
     writeln( "0: ", r[0]["double_field"].as!PGdouble_precision );
     writeln( "1: ", r[0][1].as!PGtext );
@@ -115,23 +117,26 @@ void main(string[] args)
         writeln("column name: '"~r.columnName(column)~"', bson: ", r[0][column].as!Bson);
     }
 
-    // It is possible to upload CSV data ultra-fast
-    // Re-create the necessary table
-    conn.exec("DROP TABLE IF EXISTS test_dpq2_copy;");
-    conn.exec("CREATE TABLE test_dpq2_copy (v1 TEXT, v2 INT);");
-    // Init the COPY command. This sets the connection in a COPY receive mode until putCopyEnd() is called
-    // Copy CSV data, because it's standard, ultra fast, and readable
-    conn.exec("COPY test_dpq2_copy FROM STDIN WITH (FORMAT csv);");
-    // Write 2 lines of CSV, including text that contains the delimiter. Postgresql handles it well
+    // It is possible to upload CSV data ultra-fast:
+    conn.exec("CREATE TEMP TABLE test_dpq2_copy (v1 TEXT, v2 INT)");
+
+    // Init the COPY command. This sets the connection in a COPY receive
+    // mode until putCopyEnd() is called. Copy CSV data, because it's standard,
+    // ultra fast, and readable:
+    conn.exec("COPY test_dpq2_copy FROM STDIN WITH (FORMAT csv)");
+
+    // Write 2 lines of CSV, including text that contains the delimiter.
+    // Postgresql handles it well:
     string data = "\"This, right here, is a test\",8\nWow! it works,13\n";
     conn.putCopyData(data);
+
     // Write 2 more lines
     data = "Horray!,3456\nSuper fast!,325\n";
     conn.putCopyData(data);
-    // Signal that the COPY is finished. Let Postgresql finalize the command and return any errors with the data.
-    conn.putCopyEnd();
 
-    version(LDC) destroy(r); // before Derelict unloads its bindings (prevents SIGSEGV)
+    // Signal that the COPY is finished. Let Postgresql finalize the command
+    // and return any errors with the data.
+    conn.putCopyEnd();
 }
 ```
 

example/example.d

@@ -1,8 +1,9 @@
 #!/usr/bin/env rdmd
 
 import dpq2;
-import std.stdio: writeln;
 import std.getopt;
+import std.stdio: writeln;
+import std.typecons: Nullable;
 import vibe.data.bson;
 
 void main(string[] args)
@@ -46,6 +47,7 @@ void main(string[] args)
     );
 
     auto r = conn.execParams(p);
+    scope(exit) destroy(r);
 
     writeln( "0: ", r[0]["double_field"].as!PGdouble_precision );
     writeln( "1: ", r[0][1].as!PGtext );
@@ -66,5 +68,24 @@ void main(string[] args)
         writeln("column name: '"~r.columnName(column)~"', bson: ", r[0][column].as!Bson);
     }
 
-    version(LDC) destroy(r); // before Derelict unloads its bindings (prevents SIGSEGV)
+    // It is possible to upload CSV data ultra-fast:
+    conn.exec("CREATE TEMP TABLE test_dpq2_copy (v1 TEXT, v2 INT)");
+
+    // Init the COPY command. This sets the connection in a COPY receive
+    // mode until putCopyEnd() is called. Copy CSV data, because it's standard,
+    // ultra fast, and readable:
+    conn.exec("COPY test_dpq2_copy FROM STDIN WITH (FORMAT csv)");
+
+    // Write 2 lines of CSV, including text that contains the delimiter.
+    // Postgresql handles it well:
+    string data = "\"This, right here, is a test\",8\nWow! it works,13\n";
+    conn.putCopyData(data);
+
+    // Write 2 more lines
+    data = "Horray!,3456\nSuper fast!,325\n";
+    conn.putCopyData(data);
+
+    // Signal that the COPY is finished. Let Postgresql finalize the command
+    // and return any errors with the data.
+    conn.putCopyEnd();
 }