DBZ-8403 Fix PostgreSQL 17 compilation

When compiling against PG17 on Debian testing with gcc 14, building
fails because of incompatible-pointer-type error. This commit updates
the macros added in e1f8714 to handle the pointer types.

README.md

@@ -10,15 +10,17 @@
 A PostgreSQL logical decoder output plugin to deliver data as [Protocol Buffers](https://developers.google.com/protocol-buffers), adapted for Debezium
 
 ## Thanks to
+
 - The original [Decoderbufs Project](https://github.com/xstevens/decoderbufs) on which this is based
 - [The PostgreSQL Team](https://postgresql.org) for adding [logical decoding](http://www.postgresql.org/docs/9.4/static/logicaldecoding.html) support
 
 ## Dependencies
+
 This code depends on the following libraries and requires them for compilation:
 
-* [PostgreSQL](http://www.postgresql.org) 9.6+
+- [PostgreSQL](http://www.postgresql.org) 9.6+
-* [Protobuf-c](https://github.com/protobuf-c/protobuf-c) 1.2+ - used for data serialization
+- [Protobuf-c](https://github.com/protobuf-c/protobuf-c) 1.2+ - used for data serialization
-* [PostGIS](http://www.postgis.net/) 2.1+ - used for Postgres geometric types support
+- [PostGIS](http://www.postgis.net/) 2.1+ - used for Postgres geometric types support
 
 ## Building
 
@@ -26,21 +28,26 @@ This code depends on the following libraries and requires them for compilation:
 (for pg_config), PostgreSQL server development packages, protobuf-c for the Protocol Buffer support and some PostGIS development packages.
 
 ### Installing Dependencies
+
 #### Debian
 
-    # Core build utilities 
+```bash
-    apt-get update && apt-get install -f -y software-properties-common build-essential pkg-config git postgresql-server-dev-9.6 
+# Core build utilities 
+apt-get update && apt-get install -f -y software-properties-common build-essential pkg-config git postgresql-server-dev-9.6 
 
-    # PostGIS dependency
+# PostGIS dependency
-    apt-get install -f -y libproj-dev liblwgeom-dev
+apt-get install -f -y libproj-dev liblwgeom-dev
 
-    # Protobuf-c dependency (requires a non-stable Debian repo)
+# Protobuf-c dependency (requires a non-stable Debian repo)
-    add-apt-repository "deb http://ftp.debian.org/debian testing main contrib" && apt-get update
+add-apt-repository "deb http://ftp.debian.org/debian testing main contrib" && apt-get update
-    apt-get install -y libprotobuf-c-dev=1.2.1-1+b1
+apt-get install -y libprotobuf-c-dev=1.2.1-1+b1
+```
 
 When updating the ProtoBuf definition, also install the ProtoBuf C compiler:
 
-    apt-get install -y protobuf-c-compiler=1.2.*
+```bash
+apt-get install -y protobuf-c-compiler=1.2.*
+```
 
 The above are taken from the Debezium [container images](https://github.com/debezium/docker-images).
 
@@ -53,16 +60,20 @@ Note that the last step from the above sequence is only required for Debian to b
 
 If you have all of the above prerequisites installed, clone this git repo to build from source:
 
-    git clone https://github.com/debezium/postgres-decoderbufs.git
+```bash
-    cd postgres-decoderbufs
+git clone https://github.com/debezium/postgres-decoderbufs.git
+cd postgres-decoderbufs
+```
 
 ### Optional: Re-generating ProtoBuf code
 
 This is only needed after changes to the ProtoBuf definition (_proto/pg_logicaldec.proto):
 
-    cd proto
+```bash
-    protoc-c --c_out=../src/proto pg_logicaldec.proto
+cd proto
-    cd ..
+protoc-c --c_out=../src/proto pg_logicaldec.proto
+cd ..
+```
 
 Commit the generated files to git then.
 
@@ -71,44 +82,53 @@ Commit the generated files to git then.
 If you have multiple Postgres versions installed, you can select which version to install decoderbufs into by altering your `$PATH` to point to the right version.
 Then `make` and `make install` for each version.  Here is an example:
 
-    # Install for Postgres 9.6 if I have multiple local versions
+```bash
-    export PATH=/usr/lib/postgresql/9.6/bin:$PATH
+# Install for Postgres 9.6 if I have multiple local versions
-    make
+export PATH=/usr/lib/postgresql/9.6/bin:$PATH
-    make install
+make
+make install
+```
 
 Once the extension has been installed you just need to enable it and logical replication in postgresql.conf:
 
-    # MODULES
+```bash
-    shared_preload_libraries = 'decoderbufs'
+# MODULES
+shared_preload_libraries = 'decoderbufs'
 
-    # REPLICATION
+# REPLICATION
-    wal_level = logical             # minimal, archive, hot_standby, or logical (change requires restart)
+wal_level = logical             # minimal, archive, hot_standby, or logical (change requires restart)
-    max_wal_senders = 8             # max number of walsender processes (change requires restart)
+max_wal_senders = 8             # max number of walsender processes (change requires restart)
-    wal_keep_segments = 4           # in logfile segments, 16MB each; 0 disables
+wal_keep_segments = 4           # in logfile segments, 16MB each; 0 disables
-    #wal_sender_timeout = 60s       # in milliseconds; 0 disables
+#wal_sender_timeout = 60s       # in milliseconds; 0 disables
-    max_replication_slots = 4       # max number of replication slots (change requires restart)
+max_replication_slots = 4       # max number of replication slots (change requires restart)
+```
 
 In addition, permissions will have to be added for the user that connects to the DB to be able to replicate. This can be modified in _pg\_hba.conf_ like so:
 
-    local   replication     <youruser>                          trust
+```make
-    host    replication     <youruser>  127.0.0.1/32            trust
+local   replication     <youruser>                          trust
-    host    replication     <youruser>  ::1/128                 trust
+host    replication     <youruser>  127.0.0.1/32            trust
+host    replication     <youruser>  ::1/128                 trust
+```
 
 And restart PostgreSQL.
 
 ## Usage
-    -- can use SQL for demo purposes
-    select * from pg_create_logical_replication_slot('decoderbufs_demo', 'decoderbufs');
 
-    -- DO SOME TABLE MODIFICATIONS (see below about UPDATE/DELETE)
+```sql
+-- can use SQL for demo purposes
+select * from pg_create_logical_replication_slot('decoderbufs_demo', 'decoderbufs');
 
-    -- peek at WAL changes using decoderbufs debug mode for SQL console
+-- DO SOME TABLE MODIFICATIONS (see below about UPDATE/DELETE)
-    select data from pg_logical_slot_peek_changes('decoderbufs_demo', NULL, NULL, 'debug-mode', '1');
-    -- get WAL changes using decoderbufs to update the WAL position
-    select data from pg_logical_slot_get_changes('decoderbufs_demo', NULL, NULL, 'debug-mode', '1');
 
-    -- check the WAL position of logical replicators
+-- peek at WAL changes using decoderbufs debug mode for SQL console
-    select * from pg_replication_slots where slot_type = 'logical';
+select data from pg_logical_slot_peek_changes('decoderbufs_demo', NULL, NULL, 'debug-mode', '1');
+-- get WAL changes using decoderbufs to update the WAL position
+select data from pg_logical_slot_get_changes('decoderbufs_demo', NULL, NULL, 'debug-mode', '1');
+
+-- check the WAL position of logical replicators
+select * from pg_replication_slots where slot_type = 'logical';
+```
 
 If you're performing an UPDATE/DELETE on your table and you don't see results for those operations from logical decoding, make sure you have set [REPLICA IDENTITY](http://www.postgresql.org/docs/9.4/static/sql-altertable.html#SQL-CREATETABLE-REPLICA-IDENTITY) appropriately for your use case.
 

proto/pg_logicaldec.proto

@@ -5,9 +5,12 @@ option java_outer_classname = "PgProto";
 option optimize_for = SPEED;
 
 enum Op {
+    UNKNOWN = -1;
     INSERT = 0;
     UPDATE = 1;
     DELETE = 2;
+    BEGIN  = 3;
+    COMMIT = 4;
 }
 
 message Point {

src/decoderbufs.c

@@ -60,6 +60,12 @@
 #error Expecting timestamps to be represented as integers, not as floating-point.
 #endif
 
+#if PG_VERSION_NUM >= 170000
+#define TUPLE_ACCESS(x) x
+#else
+#define TUPLE_ACCESS(x) &x->tuple
+#endif
+
 PG_MODULE_MAGIC;
 
 /* define a time macro to convert TimestampTz into something more sane,
@@ -164,16 +170,6 @@ static void pg_decode_shutdown(LogicalDecodingContext *ctx) {
   MemoryContextDelete(data->context);
 }
 
-/* BEGIN callback */
-static void pg_decode_begin_txn(LogicalDecodingContext *ctx,
-                                ReorderBufferTXN *txn) {
-}
-
-/* COMMIT callback */
-static void pg_decode_commit_txn(LogicalDecodingContext *ctx,
-                                 ReorderBufferTXN *txn, XLogRecPtr commit_lsn) {
-}
-
 /* print tuple datums (only used for debug-mode) */
 static void print_tuple_datums(StringInfo out, Decoderbufs__DatumMessage **tup,
                                size_t n) {
@@ -279,10 +275,13 @@ static void set_datum_value(Decoderbufs__DatumMessage *datum_msg, Oid typid,
       datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_INT32;
       break;
     case INT8OID:
-    case OIDOID:
       datum_msg->datum_int64 = DatumGetInt64(datum);
       datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_INT64;
       break;
+    case OIDOID:
+      datum_msg->datum_int64 = (Oid) DatumGetUInt64(datum);
+      datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_INT64;
+      break;
     case FLOAT4OID:
       datum_msg->datum_float = DatumGetFloat4(datum);
       datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_FLOAT;
@@ -314,23 +313,21 @@ static void set_datum_value(Decoderbufs__DatumMessage *datum_msg, Oid typid,
     case TIMESTAMPOID:
       ts = DatumGetTimestamp(datum);
       if (TIMESTAMP_NOT_FINITE(ts)) {
-           ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
+           datum_msg->datum_int64 = ts;
-           errmsg("timestamp \'%s\'out of range", ts ? strVal(ts) : "(null)")));
       } else {
            datum_msg->datum_int64 = TIMESTAMPTZ_TO_USEC_SINCE_EPOCH(ts);
+      }
       datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_INT64;
       break;
-      }
     case TIMESTAMPTZOID:
       ts = DatumGetTimestampTz(datum);
       if (TIMESTAMP_NOT_FINITE(ts)) {
-           ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
+           datum_msg->datum_int64 = ts;
-           errmsg("timestamp \'%s\'out of range", ts ? strVal(ts) : "(null)")));
       } else {
            datum_msg->datum_int64 = TIMESTAMPTZ_TO_USEC_SINCE_EPOCH(ts);
+      }
       datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_INT64;
       break;
-        }
     case DATEOID:
       /* simply get the number of days as the stored 32 bit value and convert to EPOCH */
       datum_msg->datum_int32 = DATE_TO_DAYS_SINCE_EPOCH(DatumGetDateADT(datum));
@@ -491,6 +488,90 @@ static void add_metadata_to_msg(Decoderbufs__TypeInfo **tmsg,
   }
 }
 
+/* BEGIN callback */
+static void pg_decode_begin_txn(LogicalDecodingContext *ctx,
+                                ReorderBufferTXN *txn) {
+
+  DecoderData *data;
+  MemoryContext old;
+  Decoderbufs__RowMessage rmsg = DECODERBUFS__ROW_MESSAGE__INIT;
+  elog(DEBUG1, "Entering begin callback");
+
+
+  /* Avoid leaking memory by using and resetting our own context */
+  data = ctx->output_plugin_private;
+  old = MemoryContextSwitchTo(data->context);
+
+  rmsg.op = DECODERBUFS__OP__BEGIN;
+  rmsg.has_op = true;
+  rmsg.transaction_id = txn->xid;
+  rmsg.has_transaction_id = true;
+#if PG_VERSION_NUM >= 150000
+  rmsg.commit_time = TIMESTAMPTZ_TO_USEC_SINCE_EPOCH(txn->xact_time.commit_time);
+#else
+  rmsg.commit_time = TIMESTAMPTZ_TO_USEC_SINCE_EPOCH(txn->commit_time);
+#endif
+  rmsg.has_commit_time = true;
+
+  /* write msg */
+  OutputPluginPrepareWrite(ctx, true);
+  if (data->debug_mode) {
+    print_row_msg(ctx->out, &rmsg);
+  } else {
+    size_t psize = decoderbufs__row_message__get_packed_size(&rmsg);
+    void *packed = palloc(psize);
+    size_t ssize = decoderbufs__row_message__pack(&rmsg, packed);
+    appendBinaryStringInfo(ctx->out, packed, ssize);
+  }
+  OutputPluginWrite(ctx, true);
+
+  /* Cleanup, freeing memory */
+  MemoryContextSwitchTo(old);
+  MemoryContextReset(data->context);
+}
+
+/* COMMIT callback */
+static void pg_decode_commit_txn(LogicalDecodingContext *ctx,
+                                 ReorderBufferTXN *txn, XLogRecPtr commit_lsn) {
+
+  DecoderData *data;
+  MemoryContext old;
+  Decoderbufs__RowMessage rmsg = DECODERBUFS__ROW_MESSAGE__INIT;
+  elog(DEBUG1, "Entering commit callback");
+
+
+  /* Avoid leaking memory by using and resetting our own context */
+  data = ctx->output_plugin_private;
+  old = MemoryContextSwitchTo(data->context);
+
+  rmsg.op = DECODERBUFS__OP__COMMIT;
+  rmsg.has_op = true;
+  rmsg.transaction_id = txn->xid;
+  rmsg.has_transaction_id = true;
+#if PG_VERSION_NUM >= 150000
+  rmsg.commit_time = TIMESTAMPTZ_TO_USEC_SINCE_EPOCH(txn->xact_time.commit_time);
+#else
+  rmsg.commit_time = TIMESTAMPTZ_TO_USEC_SINCE_EPOCH(txn->commit_time);
+#endif
+  rmsg.has_commit_time = true;
+
+  /* write msg */
+  OutputPluginPrepareWrite(ctx, true);
+  if (data->debug_mode) {
+    print_row_msg(ctx->out, &rmsg);
+  } else {
+    size_t psize = decoderbufs__row_message__get_packed_size(&rmsg);
+    void *packed = palloc(psize);
+    size_t ssize = decoderbufs__row_message__pack(&rmsg, packed);
+    appendBinaryStringInfo(ctx->out, packed, ssize);
+  }
+  OutputPluginWrite(ctx, true);
+
+  /* Cleanup, freeing memory */
+  MemoryContextSwitchTo(old);
+  MemoryContextReset(data->context);
+}
+
 /* callback for individual changed tuples */
 static void pg_decode_change(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
                              Relation relation, ReorderBufferChange *change) {
@@ -523,7 +604,11 @@ static void pg_decode_change(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
   /* set common fields */
   rmsg.transaction_id = txn->xid;
   rmsg.has_transaction_id = true;
+#if PG_VERSION_NUM >= 150000
+  rmsg.commit_time = TIMESTAMPTZ_TO_USEC_SINCE_EPOCH(txn->xact_time.commit_time);
+#else
   rmsg.commit_time = TIMESTAMPTZ_TO_USEC_SINCE_EPOCH(txn->commit_time);
+#endif
   rmsg.has_commit_time = true;
   rmsg.table = pstrdup(quote_qualified_identifier(get_namespace_name(get_rel_namespace(RelationGetRelid(relation))),
     NameStr(class_form->relname)));
@@ -543,13 +628,13 @@ static void pg_decode_change(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
         rmsg.new_tuple =
             palloc(sizeof(Decoderbufs__DatumMessage*) * rmsg.n_new_tuple);
         tuple_to_tuple_msg(rmsg.new_tuple, relation,
-                           &change->data.tp.newtuple->tuple, tupdesc);
+                           TUPLE_ACCESS(change->data.tp.newtuple), tupdesc);
 
         rmsg.n_new_typeinfo = rmsg.n_new_tuple;
         rmsg.new_typeinfo =
             palloc(sizeof(Decoderbufs__TypeInfo*) * rmsg.n_new_typeinfo);
         add_metadata_to_msg(rmsg.new_typeinfo, relation,
-                           &change->data.tp.newtuple->tuple, tupdesc);
+                           TUPLE_ACCESS(change->data.tp.newtuple), tupdesc);
       }
       break;
     case REORDER_BUFFER_CHANGE_UPDATE:
@@ -564,7 +649,7 @@ static void pg_decode_change(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
           rmsg.old_tuple =
               palloc(sizeof(Decoderbufs__DatumMessage*) * rmsg.n_old_tuple);
           tuple_to_tuple_msg(rmsg.old_tuple, relation,
-                             &change->data.tp.oldtuple->tuple, tupdesc);
+                             TUPLE_ACCESS(change->data.tp.oldtuple), tupdesc);
         }
         if (change->data.tp.newtuple != NULL) {
           elog(DEBUG1, "decoding new tuple information");
@@ -574,13 +659,13 @@ static void pg_decode_change(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
           rmsg.new_tuple =
               palloc(sizeof(Decoderbufs__DatumMessage*) * rmsg.n_new_tuple);
           tuple_to_tuple_msg(rmsg.new_tuple, relation,
-                             &change->data.tp.newtuple->tuple, tupdesc);
+                             TUPLE_ACCESS(change->data.tp.newtuple), tupdesc);
 
           rmsg.n_new_typeinfo = rmsg.n_new_tuple;
           rmsg.new_typeinfo =
               palloc(sizeof(Decoderbufs__TypeInfo*) * rmsg.n_new_typeinfo);
           add_metadata_to_msg(rmsg.new_typeinfo, relation,
-                             &change->data.tp.newtuple->tuple, tupdesc);
+                             TUPLE_ACCESS(change->data.tp.newtuple), tupdesc);
         }
       }
       break;
@@ -596,7 +681,7 @@ static void pg_decode_change(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
         rmsg.old_tuple =
             palloc(sizeof(Decoderbufs__DatumMessage*) *  rmsg.n_old_tuple);
         tuple_to_tuple_msg(rmsg.old_tuple, relation,
-                           &change->data.tp.oldtuple->tuple, tupdesc);
+                           TUPLE_ACCESS(change->data.tp.oldtuple), tupdesc);
       } else {
         elog(DEBUG1, "no information to decode from DELETE because either no PK is present or REPLICA IDENTITY NOTHING or invalid ");
       }

src/proto/pg_logicaldec.pb-c.c

@@ -565,20 +565,26 @@ const ProtobufCMessageDescriptor decoderbufs__row_message__descriptor =
   (ProtobufCMessageInit) decoderbufs__row_message__init,
   NULL,NULL,NULL    /* reserved[123] */
 };
-static const ProtobufCEnumValue decoderbufs__op__enum_values_by_number[3] =
+static const ProtobufCEnumValue decoderbufs__op__enum_values_by_number[6] =
 {
+  { "UNKNOWN", "DECODERBUFS__OP__UNKNOWN", -1 },
   { "INSERT", "DECODERBUFS__OP__INSERT", 0 },
   { "UPDATE", "DECODERBUFS__OP__UPDATE", 1 },
   { "DELETE", "DECODERBUFS__OP__DELETE", 2 },
+  { "BEGIN", "DECODERBUFS__OP__BEGIN", 3 },
+  { "COMMIT", "DECODERBUFS__OP__COMMIT", 4 },
 };
 static const ProtobufCIntRange decoderbufs__op__value_ranges[] = {
-{0, 0},{0, 3}
+{-1, 0},{0, 6}
 };
-static const ProtobufCEnumValueIndex decoderbufs__op__enum_values_by_name[3] =
+static const ProtobufCEnumValueIndex decoderbufs__op__enum_values_by_name[6] =
 {
-  { "DELETE", 2 },
+  { "BEGIN", 4 },
-  { "INSERT", 0 },
+  { "COMMIT", 5 },
-  { "UPDATE", 1 },
+  { "DELETE", 3 },
+  { "INSERT", 1 },
+  { "UNKNOWN", 0 },
+  { "UPDATE", 2 },
 };
 const ProtobufCEnumDescriptor decoderbufs__op__descriptor =
 {
@@ -587,9 +593,9 @@ const ProtobufCEnumDescriptor decoderbufs__op__descriptor =
   "Op",
   "Decoderbufs__Op",
   "decoderbufs",
-  3,
+  6,
   decoderbufs__op__enum_values_by_number,
-  3,
+  6,
   decoderbufs__op__enum_values_by_name,
   1,
   decoderbufs__op__value_ranges,

src/proto/pg_logicaldec.pb-c.h

@@ -24,9 +24,12 @@ typedef struct _Decoderbufs__RowMessage Decoderbufs__RowMessage;
 /* --- enums --- */
 
 typedef enum _Decoderbufs__Op {
+  DECODERBUFS__OP__UNKNOWN = -1,
   DECODERBUFS__OP__INSERT = 0,
   DECODERBUFS__OP__UPDATE = 1,
-  DECODERBUFS__OP__DELETE = 2
+  DECODERBUFS__OP__DELETE = 2,
+  DECODERBUFS__OP__BEGIN = 3,
+  DECODERBUFS__OP__COMMIT = 4
     PROTOBUF_C__FORCE_ENUM_TO_BE_INT_SIZE(DECODERBUFS__OP)
 } Decoderbufs__Op;