Add dbmirror to /contrib. Minor C cleanups and Makefile.

Steven Singer

contrib/dbmirror/MirrorSetup.sql

@@ -0,0 +1,42 @@
+
+CREATE FUNCTION "recordchange" () RETURNS opaque AS
+'/usr/local/pgsql/lib/pending.so', 'recordchange' LANGUAGE 'C';
+
+CREATE TABLE "MirrorHost" (
+"MirrorHostId" serial,
+"HostName" varchar NOT NULL
+);
+
+
+
+
+
+CREATE TABLE "Pending" (
+"SeqId" serial,
+"TableName" varchar NOT NULL,
+"Op" character,
+"XID" int4 NOT NULL,
+PRIMARY KEY ("SeqId")
+
+);
+
+CREATE INDEX "Pending_XID_Index" ON "Pending" ("XID");
+
+CREATE TABLE "PendingData" (
+"SeqId" int4 NOT NULL,
+"IsKey" bool NOT NULL,
+"Data" varchar,
+PRIMARY KEY ("SeqId", "IsKey") ,
+FOREIGN KEY ("SeqId") REFERENCES "Pending" ("SeqId") ON UPDATE CASCADE  ON DELETE CASCADE
+);
+
+
+CREATE TABLE "MirroredTransaction" (
+"XID" int4 NOT NULL,
+"LastSeqId" int4 NOT NULL,
+"MirrorHostId" int4 NOT NULL,
+PRIMARY KEY  ("XID","MirrorHostId"),
+FOREIGN KEY ("MirrorHostId") REFERENCES "MirrorHost" ("MirrorHostId") ON UPDATE CASCADE ON DELETE CASCADE,
+FOREIGN KEY ("LastSeqId") REFERENCES "Pending" ("SeqId")  ON UPDATE
+CASCADE ON DELETE CASCADE
+);