1 files changed, 124 insertions, 0 deletions
diff --git a/src/include/catalog/pg_database.h b/src/include/catalog/pg_database.h
new file mode 100644
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--- /dev/null
+++ b/src/include/catalog/pg_database.h
@@ -0,0 +1,124 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_database.h
+ *	  definition of the "database" system catalog (pg_database)
+ *
+ *
+ * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/catalog/pg_database.h
+ *
+ * NOTES
+ *	  The Catalog.pm module reads this file and derives schema
+ *	  information.
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_DATABASE_H
+#define PG_DATABASE_H
+
+#include "catalog/genbki.h"
+#include "catalog/pg_database_d.h"
+
+/* ----------------
+ *		pg_database definition.  cpp turns this into
+ *		typedef struct FormData_pg_database
+ * ----------------
+ */
+CATALOG(pg_database,1262,DatabaseRelationId) BKI_SHARED_RELATION BKI_ROWTYPE_OID(1248,DatabaseRelation_Rowtype_Id) BKI_SCHEMA_MACRO
+{
+	/* oid */
+	Oid			oid;
+
+	/* database name */
+	NameData	datname;
+
+	/* owner of database */
+	Oid			datdba BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
+
+	/* character encoding */
+	int32		encoding;
+
+	/* locale provider, see pg_collation.collprovider */
+	char		datlocprovider;
+
+	/* allowed as CREATE DATABASE template? */
+	bool		datistemplate;
+
+	/* new connections allowed? */
+	bool		datallowconn;
+
+	/*
+	 * Max connections allowed. Negative values have special meaning, see
+	 * DATCONNLIMIT_* defines below.
+	 */
+	int32		datconnlimit;
+
+	/* all Xids < this are frozen in this DB */
+	TransactionId datfrozenxid;
+
+	/* all multixacts in the DB are >= this */
+	TransactionId datminmxid;
+
+	/* default table space for this DB */
+	Oid			dattablespace BKI_LOOKUP(pg_tablespace);
+
+#ifdef CATALOG_VARLEN			/* variable-length fields start here */
+	/* LC_COLLATE setting */
+	text		datcollate BKI_FORCE_NOT_NULL;
+
+	/* LC_CTYPE setting */
+	text		datctype BKI_FORCE_NOT_NULL;
+
+	/* ICU locale ID */
+	text		daticulocale;
+
+	/* ICU collation rules */
+	text		daticurules;
+
+	/* provider-dependent version of collation data */
+	text		datcollversion BKI_DEFAULT(_null_);
+
+	/* access permissions */
+	aclitem		datacl[1];
+#endif
+} FormData_pg_database;
+
+/* ----------------
+ *		Form_pg_database corresponds to a pointer to a tuple with
+ *		the format of pg_database relation.
+ * ----------------
+ */
+typedef FormData_pg_database *Form_pg_database;
+
+DECLARE_TOAST_WITH_MACRO(pg_database, 4177, 4178, PgDatabaseToastTable, PgDatabaseToastIndex);
+
+DECLARE_UNIQUE_INDEX(pg_database_datname_index, 2671, DatabaseNameIndexId, on pg_database using btree(datname name_ops));
+DECLARE_UNIQUE_INDEX_PKEY(pg_database_oid_index, 2672, DatabaseOidIndexId, on pg_database using btree(oid oid_ops));
+
+/*
+ * pg_database.dat contains an entry for template1, but not for the template0
+ * or postgres databases, because those are created later in initdb.
+ * However, we still want to manually assign the OIDs for template0 and
+ * postgres, so declare those here.
+ */
+DECLARE_OID_DEFINING_MACRO(Template0DbOid, 4);
+DECLARE_OID_DEFINING_MACRO(PostgresDbOid, 5);
+
+/*
+ * Special values for pg_database.datconnlimit. Normal values are >= 0.
+ */
+#define		  DATCONNLIMIT_UNLIMITED	-1	/* no limit */
+
+/*
+ * A database is set to invalid partway through being dropped.  Using
+ * datconnlimit=-2 for this purpose isn't particularly clean, but is
+ * backpatchable.
+ */
+#define		  DATCONNLIMIT_INVALID_DB	-2
+
+extern bool database_is_invalid_form(Form_pg_database datform);
+extern bool database_is_invalid_oid(Oid dboid);
+
+#endif							/* PG_DATABASE_H */