/*
* GetTableCreationCommands takes in a relationId, and returns the list of DDL
* commands needed to reconstruct the relation, excluding indexes and
* constraints.
*/
List *
GetTableCreationCommands(Oid relationId, bool includeSequenceDefaults)
{
List *tableDDLEventList = NIL;
char tableType = 0;
char *tableSchemaDef = NULL;
char *tableColumnOptionsDef = NULL;
char *createSchemaCommand = NULL;
Oid schemaId = InvalidOid;
/*
* Set search_path to NIL so that all objects outside of pg_catalog will be
* schema-prefixed. pg_catalog will be added automatically when we call
* PushOverrideSearchPath(), since we set addCatalog to true;
*/
OverrideSearchPath *overridePath = GetOverrideSearchPath(CurrentMemoryContext);
overridePath->schemas = NIL;
overridePath->addCatalog = true;
PushOverrideSearchPath(overridePath);
/* if foreign table, fetch extension and server definitions */
tableType = get_rel_relkind(relationId);
if (tableType == RELKIND_FOREIGN_TABLE)
{
char *extensionDef = pg_get_extensiondef_string(relationId);
char *serverDef = pg_get_serverdef_string(relationId);
if (extensionDef != NULL)
{
tableDDLEventList = lappend(tableDDLEventList, extensionDef);
}
tableDDLEventList = lappend(tableDDLEventList, serverDef);
}
/* create schema if the table is not in the default namespace (public) */
schemaId = get_rel_namespace(relationId);
createSchemaCommand = CreateSchemaDDLCommand(schemaId);
if (createSchemaCommand != NULL)
{
tableDDLEventList = lappend(tableDDLEventList, createSchemaCommand);
}
/* fetch table schema and column option definitions */
tableSchemaDef = pg_get_tableschemadef_string(relationId, includeSequenceDefaults);
tableColumnOptionsDef = pg_get_tablecolumnoptionsdef_string(relationId);
tableDDLEventList = lappend(tableDDLEventList, tableSchemaDef);
if (tableColumnOptionsDef != NULL)
{
tableDDLEventList = lappend(tableDDLEventList, tableColumnOptionsDef);
}
/* revert back to original search_path */
PopOverrideSearchPath();
return tableDDLEventList;
}
tableDDLEventList = lappend(tableDDLEventList, schemaNameDef->data);
}
/* create sequences if needed */
foreach(sequenceIdCell, sequenceIdlist)
{
Oid sequenceRelid = lfirst_oid(sequenceIdCell);
char *sequenceDef = pg_get_sequencedef_string(sequenceRelid);
tableDDLEventList = lappend(tableDDLEventList, sequenceDef);
}
/* fetch table schema and column option definitions */
tableSchemaDef = pg_get_tableschemadef_string(relationId);
tableColumnOptionsDef = pg_get_tablecolumnoptionsdef_string(relationId);
tableDDLEventList = lappend(tableDDLEventList, tableSchemaDef);
if (tableColumnOptionsDef != NULL)
{
tableDDLEventList = lappend(tableDDLEventList, tableColumnOptionsDef);
}
/* open system catalog and scan all indexes that belong to this table */
pgIndex = heap_open(IndexRelationId, AccessShareLock);
ScanKeyInit(&scanKey[0], Anum_pg_index_indrelid,
BTEqualStrategyNumber, F_OIDEQ, relationId);
scanDescriptor = systable_beginscan(pgIndex,
IndexIndrelidIndexId, true, /* indexOK */