Makefile

@@ -4,11 +4,16 @@ EXTENSION = decoderbufs
 PROTOBUF_C_CFLAGS = $(shell pkg-config --cflags 'libprotobuf-c >= 1.0.0')
 PROTOBUF_C_LDFLAGS = $(shell pkg-config --libs 'libprotobuf-c >= 1.0.0')
 
+ifneq ($(USE_POSTGIS),false)
+C_PARAMS = -DUSE_POSTGIS
+POSTGIS_C_LDFLAGS = -L/usr/local/lib -llwgeom
+endif
+
 PG_CPPFLAGS += -std=c11 $(PROTOBUF_C_CFLAGS) -I/usr/local/include $(C_PARAMS)
-SHLIB_LINK  += $(PROTOBUF_C_LDFLAGS)
+SHLIB_LINK  += $(PROTOBUF_C_LDFLAGS) $(POSTGIS_C_LDFLAGS)
 
 OBJS = src/decoderbufs.o src/proto/pg_logicaldec.pb-c.o
 
-PG_CONFIG ?= pg_config
+PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
 include $(PGXS)

README.md

@@ -10,28 +10,23 @@
 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+
-- [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
+* [PostgreSQL](http://www.postgresql.org) 9.6+
+* [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
 
 ## Building
 
-`postgres-decoderbufs` has to be built from source after installing required dependencies.  The required dependencies are first PostgreSQL
-(for pg_config), PostgreSQL server development packages, protobuf-c for the Protocol Buffer support and some PostGIS development packages.
+To build you will need to install PostgreSQL (for pg_config), PostgreSQL server development packages, protobuf-c for the
+Protocol Buffer support and some PostGIS development packages 
 
-### Installing Dependencies
+### Debian
 
-#### Debian
-
-```bash
     # Core build utilities 
     apt-get update && apt-get install -f -y software-properties-common build-essential pkg-config git postgresql-server-dev-9.6 
     
@@ -41,57 +36,20 @@ apt-get install -f -y libproj-dev liblwgeom-dev
     # Protobuf-c dependency (requires a non-stable Debian repo)
     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
-```
 
-When updating the ProtoBuf definition, also install the ProtoBuf C compiler:
+The above are taken from the Debezium [docker images](https://github.com/debezium/docker-images).
 
-```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).
-
-#### Other Linux distributions
+### Other Linux distributions
 
 You just need to make sure the above software packages (_or some flavour thereof_) are installed for your distro. 
 Note that the last step from the above sequence is only required for Debian to be able to install `libprotobuf-c-dev:1.2.1`
 
-### Getting the source code
+If you have all of the prerequisites installed you should be able to just:
 
-If you have all of the above prerequisites installed, clone this git repo to build from source:
-
-```bash
-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):
-
-```bash
-cd proto
-protoc-c --c_out=../src/proto pg_logicaldec.proto
-cd ..
-```
-
-Commit the generated files to git then.
-
-### Building and installing decoderbufs
-
-If you have multiple Postgres versions installed, you can select which version to install decoderbufs into by altering your `$PATH` to point to the right version.
-Then `make` and `make install` for each version.  Here is an example:
-
-```bash
-# Install for Postgres 9.6 if I have multiple local versions
-export PATH=/usr/lib/postgresql/9.6/bin:$PATH
-make
-make install
-```
+    make && make install
 
 Once the extension has been installed you just need to enable it and logical replication in postgresql.conf:
 
-```bash
     # MODULES
     shared_preload_libraries = 'decoderbufs'
     
@@ -101,21 +59,16 @@ max_wal_senders = 8             # max number of walsender processes (change requ
     wal_keep_segments = 4           # in logfile segments, 16MB each; 0 disables
     #wal_sender_timeout = 60s       # in milliseconds; 0 disables
     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:
 
-```make
     local   replication     <youruser>                          trust
     host    replication     <youruser>  127.0.0.1/32            trust
     host    replication     <youruser>  ::1/128                 trust
-```
     
 And restart PostgreSQL.
 
 ## Usage
-
-```sql
     -- can use SQL for demo purposes
     select * from pg_create_logical_replication_slot('decoderbufs_demo', 'decoderbufs');
     
@@ -128,7 +81,6 @@ select data from pg_logical_slot_get_changes('decoderbufs_demo', NULL, NULL, 'de
     
     -- 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

@@ -5,12 +5,9 @@ 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 {
@@ -30,7 +27,6 @@ message DatumMessage {
       string datum_string = 8;
       bytes datum_bytes = 9;
       Point datum_point = 10;
-      bool datum_missing = 11;
     }
 }
 

rpms/postgres-decoderbufs.spec

@@ -1,48 +0,0 @@
-Name:		postgres-decoderbufs
-Version:	0.10.0
-Release:	1%{?dist}
-Summary:	PostgreSQL Protocol Buffers logical decoder plugin
-
-License:	MIT
-URL:		https://github.com/debezium/postgres-decoderbufs
-
-%global full_version %{version}.Final
-
-Source0:	https://github.com/debezium/%{name}/archive/v%{full_version}.tar.gz
-
-BuildRequires:	gcc
-BuildRequires:	postgresql-devel >= 9.6, postgresql-server-devel >= 9.6
-BuildRequires:	postgis-devel >= 2
-BuildRequires:	protobuf-c-devel
-
-Requires:	protobuf-c
-%{?postgresql_module_requires}
-
-Recommends:	postgis
-
-%description
-A PostgreSQL logical decoder output plugin to deliver data as Protocol Buffers messages.
-
-%prep
-%setup -qn postgres-decoderbufs-%{full_version}
-
-
-%build
-%make_build
-
-
-%install
-%make_install
-
-
-%files
-%doc README.md
-%license LICENSE
-%{_libdir}/pgsql/decoderbufs.so
-%{_datadir}/pgsql/extension/decoderbufs.control
-
-
-%changelog
-* Wed Oct 9 2019 - Jiri Pechanec <jpechane@redhat.com> 0.10.0-1
-* Tue May 14 2019 - Jiri Pechanec <jpechane@redhat.com> 0.9.5-1
-- Initial RPM packaging

src/decoderbufs.c

@@ -60,10 +60,10 @@
 #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
+#ifdef USE_POSTGIS
+/* POSTGIS version define so it doesn't redef macros */
+#define POSTGIS_PGSQL_VERSION 94
+#include "liblwgeom.h"
 #endif
 
 PG_MODULE_MAGIC;
@@ -80,6 +80,10 @@ typedef struct {
   bool debug_mode;
 } DecoderData;
 
+/* GLOBALs for PostGIS dynamic OIDs */
+Oid geometry_oid = InvalidOid;
+Oid geography_oid = InvalidOid;
+
 /* these must be available to pg_dlsym() */
 extern void _PG_init(void);
 extern void _PG_output_plugin_init(OutputPluginCallbacks *cb);
@@ -115,14 +119,9 @@ static void pg_decode_startup(LogicalDecodingContext *ctx,
   elog(DEBUG1, "Entering startup callback");
 
   data = palloc(sizeof(DecoderData));
-#if PG_VERSION_NUM >= 90600
-  data->context = AllocSetContextCreate(
-      ctx->context, "decoderbufs context", ALLOCSET_DEFAULT_SIZES);
-#else
   data->context = AllocSetContextCreate(
       ctx->context, "decoderbufs context", ALLOCSET_DEFAULT_MINSIZE,
       ALLOCSET_DEFAULT_INITSIZE, ALLOCSET_DEFAULT_MAXSIZE);
-#endif
   data->debug_mode = false;
   opt->output_type = OUTPUT_PLUGIN_BINARY_OUTPUT;
 
@@ -170,6 +169,32 @@ static void pg_decode_shutdown(LogicalDecodingContext *ctx) {
   MemoryContextDelete(data->context);
 }
 
+/* BEGIN callback */
+static void pg_decode_begin_txn(LogicalDecodingContext *ctx,
+                                ReorderBufferTXN *txn) {
+#ifdef USE_POSTGIS
+  // set PostGIS geometry type id (these are dynamic)
+  // TODO: Figure out how to make sure we get the typid's from postgis extension namespace
+  if (geometry_oid == InvalidOid) {
+    geometry_oid = TypenameGetTypid("geometry");
+    if (geometry_oid != InvalidOid) {
+      elog(DEBUG1, "PostGIS geometry type detected: %u", geometry_oid);
+    }
+  }
+  if (geography_oid == InvalidOid) {
+    geography_oid = TypenameGetTypid("geography");
+    if (geography_oid != InvalidOid) {
+      elog(DEBUG1, "PostGIS geometry type detected: %u", geography_oid);
+    }
+  }
+#endif
+}
+
+/* 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) {
@@ -250,14 +275,74 @@ static void print_row_msg(StringInfo out, Decoderbufs__RowMessage *rmsg) {
 
 }
 
+/* this doesn't seem to be available in the public api (unfortunate) */
+static double numeric_to_double_no_overflow(Numeric num) {
+  char *tmp;
+  double val;
+  char *endptr;
+
+  tmp = DatumGetCString(DirectFunctionCall1(numeric_out, NumericGetDatum(num)));
+
+  /* unlike float8in, we ignore ERANGE from strtod */
+  val = strtod(tmp, &endptr);
+  if (*endptr != '\0') {
+    /* shouldn't happen ... */
+    ereport(ERROR,
+            (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
+             errmsg("invalid input syntax for type double precision: \"%s\"",
+                    tmp)));
+  }
+
+  return val;
+}
+
+static bool geography_point_as_decoderbufs_point(Datum datum,
+                                                 Decoderbufs__Point *p) {
+#ifdef USE_POSTGIS
+  GSERIALIZED *geom;
+  LWGEOM *lwgeom;
+  LWPOINT *point = NULL;
+  POINT2D p2d;
+
+  geom = (GSERIALIZED *)PG_DETOAST_DATUM(datum);
+  if (gserialized_get_type(geom) != POINTTYPE) {
+    return false;
+  }
+
+  lwgeom = lwgeom_from_gserialized(geom);
+  point = lwgeom_as_lwpoint(lwgeom);
+  if (lwgeom_is_empty(lwgeom)) {
+    return false;
+  }
+
+  getPoint2d_p(point->point, 0, &p2d);
+
+  if (p != NULL) {
+    Decoderbufs__Point dp = DECODERBUFS__POINT__INIT;
+    dp.x = p2d.x;
+    dp.y = p2d.y;
+    memcpy(p, &dp, sizeof(dp));
+    elog(DEBUG1, "Translating geography to point: (x,y) = (%f,%f)", p->x, p->y);
+  }
+
+  return true;
+#else
+  elog(DEBUG1, "PostGIS support is off, recompile decoderbufs with USE_POSTGIS option!");
+  return false;
+#endif
+}
+
 /* set a datum value based on its OID specified by typid */
 static void set_datum_value(Decoderbufs__DatumMessage *datum_msg, Oid typid,
                             Oid typoutput, Datum datum) {
+  Numeric num;
   bytea *valptr = NULL;
   const char *output = NULL;
   Point *p = NULL;
   Timestamp ts;
+  double duration;
   TimeTzADT *timetz = NULL;
+  Interval   *interval = NULL;
   Decoderbufs__Point dp = DECODERBUFS__POINT__INIT;
      
   int size = 0;
@@ -275,11 +360,8 @@ static void set_datum_value(Decoderbufs__DatumMessage *datum_msg, Oid typid,
       datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_INT32;
       break;
     case INT8OID:
-      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_int64 = DatumGetInt64(datum);
       datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_INT64;
       break;
     case FLOAT4OID:
@@ -305,7 +387,6 @@ static void set_datum_value(Decoderbufs__DatumMessage *datum_msg, Oid typid,
     case BITOID:
     case VARBITOID:
     case UUIDOID:
-    case INTERVALOID:
       output = OidOutputFunctionCall(typoutput, datum);
       datum_msg->datum_string = pnstrdup(output, strlen(output));
       datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_STRING;
@@ -313,21 +394,23 @@ static void set_datum_value(Decoderbufs__DatumMessage *datum_msg, Oid typid,
     case TIMESTAMPOID:
       ts = DatumGetTimestamp(datum);
       if (TIMESTAMP_NOT_FINITE(ts)) {
-           datum_msg->datum_int64 = ts;
+           ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
+           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)) {
-           datum_msg->datum_int64 = ts;
+           ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
+           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));
@@ -343,6 +426,15 @@ static void set_datum_value(Decoderbufs__DatumMessage *datum_msg, Oid typid,
       datum_msg->datum_double = (double) (timetz->time + (timetz->zone * 1000000.0));
       datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_DOUBLE;
       break;     
+    case INTERVALOID:
+      interval = DatumGetIntervalP(datum);
+      /* 
+        Convert the month part of Interval to days using assumed average month length of 365.25/12.0 days. 
+      */  
+      duration = interval->time + interval->day * (double) USECS_PER_DAY + interval->month * ((DAYS_PER_YEAR / (double) MONTHS_PER_YEAR) * USECS_PER_DAY);
+      datum_msg->datum_double = duration;
+      datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_DOUBLE;
+      break;
     case BYTEAOID:
       valptr = DatumGetByteaPCopy(datum);
       size = VARSIZE(valptr) - VARHDRSZ;
@@ -360,7 +452,13 @@ static void set_datum_value(Decoderbufs__DatumMessage *datum_msg, Oid typid,
       datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_POINT;
       break;
     default:
-      {
+      // PostGIS uses dynamic OIDs so we need to check the type again here
+      if (typid == geometry_oid || typid == geography_oid) {
+        elog(DEBUG1, "Converting geography point to datum_point");
+        datum_msg->datum_point = palloc(sizeof(Decoderbufs__Point));
+        geography_point_as_decoderbufs_point(datum, datum_msg->datum_point);
+        datum_msg->datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_POINT;
+      } else {
         int len;
         elog(DEBUG1, "Encountered unknown typid: %d, using bytes", typid);
         output = OidOutputFunctionCall(typoutput, datum);
@@ -380,7 +478,7 @@ static int valid_attributes_count_from(TupleDesc tupdesc) {
   int natt;
   int count = 0;
   for (natt = 0; natt < tupdesc->natts; natt++) {
-      Form_pg_attribute attr = TupleDescAttr(tupdesc, natt);
+      Form_pg_attribute attr = tupdesc->attrs[natt];
       
       /* skip dropped columns and system columns */
       if (attr->attisdropped  || attr->attnum < 0) {       
@@ -408,7 +506,7 @@ static void tuple_to_tuple_msg(Decoderbufs__DatumMessage **tmsg,
     bool typisvarlena;
     Decoderbufs__DatumMessage datum_msg = DECODERBUFS__DATUM_MESSAGE__INIT;
 
-    attr = TupleDescAttr(tupdesc, natt);
+    attr = tupdesc->attrs[natt];
     
     /* skip dropped columns and system columns */
     if (attr->attisdropped || attr->attnum < 0) {
@@ -433,8 +531,7 @@ static void tuple_to_tuple_msg(Decoderbufs__DatumMessage **tmsg,
     getTypeOutputInfo(attr->atttypid, &typoutput, &typisvarlena);
     if (!isnull) {
       if (typisvarlena && VARATT_IS_EXTERNAL_ONDISK(origval)) {
-        datum_msg.datum_missing = true;
-        datum_msg.datum_case = DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_MISSING;
+        // TODO: Is there a way we can handle this?
         elog(DEBUG1, "Not handling external on disk varlena at the moment.");
       } else if (!typisvarlena) {
         set_datum_value(&datum_msg, attr->atttypid, typoutput, origval);
@@ -467,7 +564,7 @@ static void add_metadata_to_msg(Decoderbufs__TypeInfo **tmsg,
     Decoderbufs__TypeInfo typeinfo = DECODERBUFS__TYPE_INFO__INIT;
     bool not_null;
 
-    attr = TupleDescAttr(tupdesc, natt);
+    attr = tupdesc->attrs[natt];
 
     /* skip dropped columns and system columns */
     if (attr->attisdropped || attr->attnum < 0) {
@@ -488,90 +585,6 @@ 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) {
@@ -604,11 +617,7 @@ 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)));
@@ -628,13 +637,13 @@ 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,
-                           TUPLE_ACCESS(change->data.tp.newtuple), tupdesc);
+                           &change->data.tp.newtuple->tuple, 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,
-                           TUPLE_ACCESS(change->data.tp.newtuple), tupdesc);
+                           &change->data.tp.newtuple->tuple, tupdesc);
       }
       break;
     case REORDER_BUFFER_CHANGE_UPDATE:
@@ -649,7 +658,7 @@ 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,
-                             TUPLE_ACCESS(change->data.tp.oldtuple), tupdesc);
+                             &change->data.tp.oldtuple->tuple, tupdesc);
         }
         if (change->data.tp.newtuple != NULL) {
           elog(DEBUG1, "decoding new tuple information");
@@ -659,13 +668,13 @@ 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,
-                             TUPLE_ACCESS(change->data.tp.newtuple), tupdesc);
+                             &change->data.tp.newtuple->tuple, 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,
-                             TUPLE_ACCESS(change->data.tp.newtuple), tupdesc);
+                             &change->data.tp.newtuple->tuple, tupdesc);
         }
       }
       break;
@@ -681,7 +690,7 @@ 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,
-                           TUPLE_ACCESS(change->data.tp.oldtuple), tupdesc);
+                           &change->data.tp.oldtuple->tuple, 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

@@ -230,7 +230,7 @@ const ProtobufCMessageDescriptor decoderbufs__point__descriptor =
   (ProtobufCMessageInit) decoderbufs__point__init,
   NULL,NULL,NULL    /* reserved[123] */
 };
-static const ProtobufCFieldDescriptor decoderbufs__datum_message__field_descriptors[11] =
+static const ProtobufCFieldDescriptor decoderbufs__datum_message__field_descriptors[10] =
 {
   {
     "column_name",
@@ -352,18 +352,6 @@ static const ProtobufCFieldDescriptor decoderbufs__datum_message__field_descript
     0 | PROTOBUF_C_FIELD_FLAG_ONEOF,             /* flags */
     0,NULL,NULL    /* reserved1,reserved2, etc */
   },
-  {
-    "datum_missing",
-    11,
-    PROTOBUF_C_LABEL_OPTIONAL,
-    PROTOBUF_C_TYPE_BOOL,
-    offsetof(Decoderbufs__DatumMessage, datum_case),
-    offsetof(Decoderbufs__DatumMessage, datum_missing),
-    NULL,
-    NULL,
-    0 | PROTOBUF_C_FIELD_FLAG_ONEOF,             /* flags */
-    0,NULL,NULL    /* reserved1,reserved2, etc */
-  },
 };
 static const unsigned decoderbufs__datum_message__field_indices_by_name[] = {
   0,   /* field[0] = column_name */
@@ -374,14 +362,13 @@ static const unsigned decoderbufs__datum_message__field_indices_by_name[] = {
   4,   /* field[4] = datum_float */
   2,   /* field[2] = datum_int32 */
   3,   /* field[3] = datum_int64 */
-  10,   /* field[10] = datum_missing */
   9,   /* field[9] = datum_point */
   7,   /* field[7] = datum_string */
 };
 static const ProtobufCIntRange decoderbufs__datum_message__number_ranges[1 + 1] =
 {
   { 1, 0 },
-  { 0, 11 }
+  { 0, 10 }
 };
 const ProtobufCMessageDescriptor decoderbufs__datum_message__descriptor =
 {
@@ -391,7 +378,7 @@ const ProtobufCMessageDescriptor decoderbufs__datum_message__descriptor =
   "Decoderbufs__DatumMessage",
   "decoderbufs",
   sizeof(Decoderbufs__DatumMessage),
-  11,
+  10,
   decoderbufs__datum_message__field_descriptors,
   decoderbufs__datum_message__field_indices_by_name,
   1,  decoderbufs__datum_message__number_ranges,
@@ -565,26 +552,20 @@ 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[6] =
+static const ProtobufCEnumValue decoderbufs__op__enum_values_by_number[3] =
 {
-  { "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[] = {
-{-1, 0},{0, 6}
+{0, 0},{0, 3}
 };
-static const ProtobufCEnumValueIndex decoderbufs__op__enum_values_by_name[6] =
+static const ProtobufCEnumValueIndex decoderbufs__op__enum_values_by_name[3] =
 {
-  { "BEGIN", 4 },
-  { "COMMIT", 5 },
-  { "DELETE", 3 },
-  { "INSERT", 1 },
-  { "UNKNOWN", 0 },
-  { "UPDATE", 2 },
+  { "DELETE", 2 },
+  { "INSERT", 0 },
+  { "UPDATE", 1 },
 };
 const ProtobufCEnumDescriptor decoderbufs__op__descriptor =
 {
@@ -593,9 +574,9 @@ const ProtobufCEnumDescriptor decoderbufs__op__descriptor =
   "Op",
   "Decoderbufs__Op",
   "decoderbufs",
-  6,
+  3,
   decoderbufs__op__enum_values_by_number,
-  6,
+  3,
   decoderbufs__op__enum_values_by_name,
   1,
   decoderbufs__op__value_ranges,

src/proto/pg_logicaldec.pb-c.h

@@ -24,12 +24,9 @@ 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__BEGIN = 3,
-  DECODERBUFS__OP__COMMIT = 4
+  DECODERBUFS__OP__DELETE = 2
     PROTOBUF_C__FORCE_ENUM_TO_BE_INT_SIZE(DECODERBUFS__OP)
 } Decoderbufs__Op;
 
@@ -56,7 +53,6 @@ typedef enum {
   DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_STRING = 8,
   DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_BYTES = 9,
   DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_POINT = 10,
-  DECODERBUFS__DATUM_MESSAGE__DATUM_DATUM_MISSING = 11,
 } Decoderbufs__DatumMessage__DatumCase;
 
 struct  _Decoderbufs__DatumMessage
@@ -75,7 +71,6 @@ struct  _Decoderbufs__DatumMessage
     char *datum_string;
     ProtobufCBinaryData datum_bytes;
     Decoderbufs__Point *datum_point;
-    protobuf_c_boolean datum_missing;
   };
 };
 #define DECODERBUFS__DATUM_MESSAGE__INIT \