Set range table for CopyFrom() in tablesync

CopyFrom() needs a range table for formatting certain errors for
constraint violations.

This changes the mechanism of how the range table is passed to the
CopyFrom() executor state.  We used to generate the range table and one
entry for the relation manually inside DoCopy().  Now we use
addRangeTableEntryForRelation() to setup the range table and relation
entry for the ParseState, which is then passed down by BeginCopyFrom().

Author: Petr Jelinek <petr.jelinek@2ndquadrant.com>
Reported-by: Euler Taveira <euler@timbira.com.br>

src/backend/commands/copy.c

@@ -37,6 +37,7 @@
 #include "optimizer/clauses.h"
 #include "optimizer/planner.h"
 #include "nodes/makefuncs.h"
+#include "parser/parse_relation.h"
 #include "rewrite/rewriteHandler.h"
 #include "storage/fd.h"
 #include "tcop/tcopprot.h"
@@ -787,7 +788,6 @@ DoCopy(ParseState *pstate, const CopyStmt *stmt,
 	Relation	rel;
 	Oid			relid;
 	RawStmt    *query = NULL;
-	List	   *range_table = NIL;
 
 	/* Disallow COPY to/from file or program except to superusers. */
 	if (!pipe && !superuser())
@@ -809,7 +809,6 @@ DoCopy(ParseState *pstate, const CopyStmt *stmt,
 	if (stmt->relation)
 	{
 		TupleDesc	tupDesc;
-		AclMode		required_access = (is_from ? ACL_INSERT : ACL_SELECT);
 		List	   *attnums;
 		ListCell   *cur;
 		RangeTblEntry *rte;
@@ -822,12 +821,8 @@ DoCopy(ParseState *pstate, const CopyStmt *stmt,
 
 		relid = RelationGetRelid(rel);
 
-		rte = makeNode(RangeTblEntry);
-		rte->rtekind = RTE_RELATION;
-		rte->relid = RelationGetRelid(rel);
-		rte->relkind = rel->rd_rel->relkind;
-		rte->requiredPerms = required_access;
-		range_table = list_make1(rte);
+		rte = addRangeTableEntryForRelation(pstate, rel, NULL, false, false);
+		rte->requiredPerms = (is_from ? ACL_INSERT : ACL_SELECT);
 
 		tupDesc = RelationGetDescr(rel);
 		attnums = CopyGetAttnums(tupDesc, rel, stmt->attlist);
@@ -841,7 +836,7 @@ DoCopy(ParseState *pstate, const CopyStmt *stmt,
 			else
 				rte->selectedCols = bms_add_member(rte->selectedCols, attno);
 		}
-		ExecCheckRTPerms(range_table, true);
+		ExecCheckRTPerms(pstate->p_rtable, true);
 
 		/*
 		 * Permission check for row security policies.
@@ -977,7 +972,6 @@ DoCopy(ParseState *pstate, const CopyStmt *stmt,
 
 		cstate = BeginCopyFrom(pstate, rel, stmt->filename, stmt->is_program,
 							   NULL, stmt->attlist, stmt->options);
-		cstate->range_table = range_table;
 		*processed = CopyFrom(cstate);	/* copy from file to database */
 		EndCopyFrom(cstate);
 	}
@@ -2921,6 +2915,10 @@ BeginCopyFrom(ParseState *pstate,
 	cstate->raw_buf = (char *) palloc(RAW_BUF_SIZE + 1);
 	cstate->raw_buf_index = cstate->raw_buf_len = 0;
 
+	/* Assign range table, we'll need it in CopyFrom. */
+	if (pstate)
+		cstate->range_table = pstate->p_rtable;
+
 	tupDesc = RelationGetDescr(cstate->rel);
 	attr = tupDesc->attrs;
 	num_phys_attrs = tupDesc->natts;

src/backend/replication/logical/tablesync.c

@@ -93,6 +93,8 @@
 
 #include "commands/copy.h"
 
+#include "parser/parse_relation.h"
+
 #include "replication/logicallauncher.h"
 #include "replication/logicalrelation.h"
 #include "replication/walreceiver.h"
@@ -654,6 +656,7 @@ copy_table(Relation rel)
 	StringInfoData		cmd;
 	CopyState	cstate;
 	List	   *attnamelist;
+	ParseState *pstate;
 
 	/* Get the publisher relation info. */
 	fetch_remote_table_info(get_namespace_name(RelationGetNamespace(rel)),
@@ -680,9 +683,11 @@ copy_table(Relation rel)
 
 	copybuf = makeStringInfo();
 
-	/* Create CopyState for ingestion of the data from publisher. */
+	pstate = make_parsestate(NULL);
+	addRangeTableEntryForRelation(pstate, rel, NULL, false, false);
+
 	attnamelist = make_copy_attnamelist(relmapentry);
-	cstate = BeginCopyFrom(NULL, rel, NULL, false, copy_read_data, attnamelist, NIL);
+	cstate = BeginCopyFrom(pstate, rel, NULL, false, copy_read_data, attnamelist, NIL);
 
 	/* Do the copy */
 	(void) CopyFrom(cstate);