src/include/catalog/pg_cast.dat

#----------------------------------------------------------------------
#
# pg_cast.dat
#    Initial contents of the pg_cast system catalog.
#
# Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
# Portions Copyright (c) 1994, Regents of the University of California
#
# src/include/catalog/pg_cast.dat
#
#----------------------------------------------------------------------

[

# Note: this table has OIDs, but we don't bother to assign them manually,
# since nothing needs to know the specific OID of any built-in cast.

# Numeric category: implicit casts are allowed in the direction
# int2->int4->int8->numeric->float4->float8, while casts in the
# reverse direction are assignment-only.
{ castsource => 'int8', casttarget => 'int2', castfunc => 'int2(int8)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'int8', casttarget => 'int4', castfunc => 'int4(int8)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'int8', casttarget => 'float4', castfunc => 'float4(int8)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int8', casttarget => 'float8', castfunc => 'float8(int8)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int8', casttarget => 'numeric', castfunc => 'numeric(int8)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'int8', castfunc => 'int8(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'int4', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'float4', castfunc => 'float4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'float8', castfunc => 'float8(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'numeric', castfunc => 'numeric(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'int8', castfunc => 'int8(int4)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'int2', castfunc => 'int2(int4)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'float4', castfunc => 'float4(int4)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'float8', castfunc => 'float8(int4)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'numeric', castfunc => 'numeric(int4)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'float4', casttarget => 'int8', castfunc => 'int8(float4)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'float4', casttarget => 'int2', castfunc => 'int2(float4)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'float4', casttarget => 'int4', castfunc => 'int4(float4)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'float4', casttarget => 'float8', castfunc => 'float8(float4)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'float4', casttarget => 'numeric',
  castfunc => 'numeric(float4)', castcontext => 'a', castmethod => 'f' },
{ castsource => 'float8', casttarget => 'int8', castfunc => 'int8(float8)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'float8', casttarget => 'int2', castfunc => 'int2(float8)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'float8', casttarget => 'int4', castfunc => 'int4(float8)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'float8', casttarget => 'float4', castfunc => 'float4(float8)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'float8', casttarget => 'numeric',
  castfunc => 'numeric(float8)', castcontext => 'a', castmethod => 'f' },
{ castsource => 'numeric', casttarget => 'int8', castfunc => 'int8(numeric)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'numeric', casttarget => 'int2', castfunc => 'int2(numeric)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'numeric', casttarget => 'int4', castfunc => 'int4(numeric)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'numeric', casttarget => 'float4',
  castfunc => 'float4(numeric)', castcontext => 'i', castmethod => 'f' },
{ castsource => 'numeric', casttarget => 'float8',
  castfunc => 'float8(numeric)', castcontext => 'i', castmethod => 'f' },
{ castsource => 'money', casttarget => 'numeric', castfunc => 'numeric(money)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'numeric', casttarget => 'money', castfunc => 'money(numeric)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'money', castfunc => 'money(int4)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'int8', casttarget => 'money', castfunc => 'money(int8)',
  castcontext => 'a', castmethod => 'f' },

# Allow explicit coercions between int4 and bool
{ castsource => 'int4', casttarget => 'bool', castfunc => 'bool(int4)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'bool', casttarget => 'int4', castfunc => 'int4(bool)',
  castcontext => 'e', castmethod => 'f' },

# Allow explicit coercions between xid8 and xid
{ castsource => 'xid8', casttarget => 'xid', castfunc => 'xid(xid8)',
  castcontext => 'e', castmethod => 'f' },

# OID category: allow implicit conversion from any integral type (including
# int8, to support OID literals > 2G) to OID, as well as assignment coercion
# from OID to int4 or int8.  Similarly for each OID-alias type.  Also allow
# implicit coercions between OID and each OID-alias type, as well as
# regproc<->regprocedure and regoper<->regoperator.  (Other coercions
# between alias types must pass through OID.)  Lastly, there are implicit
# casts from text and varchar to regclass, which exist mainly to support
# legacy forms of nextval() and related functions.
{ castsource => 'int8', casttarget => 'oid', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'oid', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'oid', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regproc', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regproc', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regproc', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regproc', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regproc', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regproc', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regproc', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'regproc', casttarget => 'regprocedure', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regprocedure', casttarget => 'regproc', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regprocedure', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regprocedure', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regprocedure', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regprocedure', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regprocedure', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regprocedure', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regprocedure', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regoper', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regoper', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regoper', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regoper', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regoper', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regoper', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regoper', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'regoper', casttarget => 'regoperator', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regoperator', casttarget => 'regoper', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regoperator', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regoperator', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regoperator', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regoperator', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regoperator', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regoperator', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regoperator', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regclass', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regclass', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regclass', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regclass', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regclass', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regclass', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regclass', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regcollation', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regcollation', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regcollation', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regcollation', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regcollation', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regcollation', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regcollation', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regtype', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regtype', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regtype', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regtype', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regtype', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regtype', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regtype', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regconfig', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regconfig', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regconfig', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regconfig', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regconfig', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regconfig', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regconfig', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regdictionary', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regdictionary', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regdictionary', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regdictionary', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regdictionary', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regdictionary', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regdictionary', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'text', casttarget => 'regclass', castfunc => 'regclass',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'varchar', casttarget => 'regclass', castfunc => 'regclass',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'oid', casttarget => 'regrole', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regrole', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regrole', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regrole', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regrole', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regrole', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regrole', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regnamespace', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regnamespace', casttarget => 'oid', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'int8', casttarget => 'regnamespace', castfunc => 'oid',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'regnamespace', castfunc => 'int4(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'regnamespace', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'regnamespace', casttarget => 'int8', castfunc => 'int8(oid)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'regnamespace', casttarget => 'int4', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },

# String category
{ castsource => 'text', casttarget => 'bpchar', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'text', casttarget => 'varchar', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'bpchar', casttarget => 'text', castfunc => 'text(bpchar)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'bpchar', casttarget => 'varchar', castfunc => 'text(bpchar)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'varchar', casttarget => 'text', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'varchar', casttarget => 'bpchar', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'char', casttarget => 'text', castfunc => 'text(char)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'char', casttarget => 'bpchar', castfunc => 'bpchar(char)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'char', casttarget => 'varchar', castfunc => 'text(char)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'name', casttarget => 'text', castfunc => 'text(name)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'name', casttarget => 'bpchar', castfunc => 'bpchar(name)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'name', casttarget => 'varchar', castfunc => 'varchar(name)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'text', casttarget => 'char', castfunc => 'char(text)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'bpchar', casttarget => 'char', castfunc => 'char(text)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'varchar', casttarget => 'char', castfunc => 'char(text)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'text', casttarget => 'name', castfunc => 'name(text)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'bpchar', casttarget => 'name', castfunc => 'name(bpchar)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'varchar', casttarget => 'name', castfunc => 'name(varchar)',
  castcontext => 'i', castmethod => 'f' },

# Allow explicit coercions between int4 and "char"
{ castsource => 'char', casttarget => 'int4', castfunc => 'int4(char)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'char', castfunc => 'char(int4)',
  castcontext => 'e', castmethod => 'f' },

# pg_node_tree can be coerced to, but not from, text
{ castsource => 'pg_node_tree', casttarget => 'text', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },

# pg_ndistinct can be coerced to, but not from, bytea and text
{ castsource => 'pg_ndistinct', casttarget => 'bytea', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'pg_ndistinct', casttarget => 'text', castfunc => '0',
  castcontext => 'i', castmethod => 'i' },

# pg_dependencies can be coerced to, but not from, bytea and text
{ castsource => 'pg_dependencies', casttarget => 'bytea', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'pg_dependencies', casttarget => 'text', castfunc => '0',
  castcontext => 'i', castmethod => 'i' },

# pg_mcv_list can be coerced to, but not from, bytea and text
{ castsource => 'pg_mcv_list', casttarget => 'bytea', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'pg_mcv_list', casttarget => 'text', castfunc => '0',
  castcontext => 'i', castmethod => 'i' },

# Datetime category
{ castsource => 'date', casttarget => 'timestamp',
  castfunc => 'timestamp(date)', castcontext => 'i', castmethod => 'f' },
{ castsource => 'date', casttarget => 'timestamptz',
  castfunc => 'timestamptz(date)', castcontext => 'i', castmethod => 'f' },
{ castsource => 'time', casttarget => 'interval', castfunc => 'interval(time)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'time', casttarget => 'timetz', castfunc => 'timetz(time)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'timestamp', casttarget => 'date',
  castfunc => 'date(timestamp)', castcontext => 'a', castmethod => 'f' },
{ castsource => 'timestamp', casttarget => 'time',
  castfunc => 'time(timestamp)', castcontext => 'a', castmethod => 'f' },
{ castsource => 'timestamp', casttarget => 'timestamptz',
  castfunc => 'timestamptz(timestamp)', castcontext => 'i', castmethod => 'f' },
{ castsource => 'timestamptz', casttarget => 'date',
  castfunc => 'date(timestamptz)', castcontext => 'a', castmethod => 'f' },
{ castsource => 'timestamptz', casttarget => 'time',
  castfunc => 'time(timestamptz)', castcontext => 'a', castmethod => 'f' },
{ castsource => 'timestamptz', casttarget => 'timestamp',
  castfunc => 'timestamp(timestamptz)', castcontext => 'a', castmethod => 'f' },
{ castsource => 'timestamptz', casttarget => 'timetz',
  castfunc => 'timetz(timestamptz)', castcontext => 'a', castmethod => 'f' },
{ castsource => 'interval', casttarget => 'time', castfunc => 'time(interval)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'timetz', casttarget => 'time', castfunc => 'time(timetz)',
  castcontext => 'a', castmethod => 'f' },

# Geometric category
{ castsource => 'point', casttarget => 'box', castfunc => 'box(point)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'lseg', casttarget => 'point', castfunc => 'point(lseg)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'path', casttarget => 'point', castfunc => 'point(path)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'path', casttarget => 'polygon', castfunc => 'polygon(path)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'box', casttarget => 'point', castfunc => 'point(box)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'box', casttarget => 'lseg', castfunc => 'lseg(box)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'box', casttarget => 'polygon', castfunc => 'polygon(box)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'box', casttarget => 'circle', castfunc => 'circle(box)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'polygon', casttarget => 'point', castfunc => 'point(polygon)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'polygon', casttarget => 'path', castfunc => 'path',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'polygon', casttarget => 'box', castfunc => 'box(polygon)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'polygon', casttarget => 'circle',
  castfunc => 'circle(polygon)', castcontext => 'e', castmethod => 'f' },
{ castsource => 'circle', casttarget => 'point', castfunc => 'point(circle)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'circle', casttarget => 'box', castfunc => 'box(circle)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'circle', casttarget => 'polygon',
  castfunc => 'polygon(circle)', castcontext => 'e', castmethod => 'f' },

# MAC address category
{ castsource => 'macaddr', casttarget => 'macaddr8', castfunc => 'macaddr8',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'macaddr8', casttarget => 'macaddr', castfunc => 'macaddr',
  castcontext => 'i', castmethod => 'f' },

# INET category
{ castsource => 'cidr', casttarget => 'inet', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'inet', casttarget => 'cidr', castfunc => 'cidr',
  castcontext => 'a', castmethod => 'f' },

# BitString category
{ castsource => 'bit', casttarget => 'varbit', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },
{ castsource => 'varbit', casttarget => 'bit', castfunc => '0',
  castcontext => 'i', castmethod => 'b' },

# Cross-category casts between bit and int4, int8
{ castsource => 'int8', casttarget => 'bit', castfunc => 'bit(int8,int4)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'bit', castfunc => 'bit(int4,int4)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'bit', casttarget => 'int8', castfunc => 'int8(bit)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'bit', casttarget => 'int4', castfunc => 'int4(bit)',
  castcontext => 'e', castmethod => 'f' },

# Cross-category casts to and from TEXT
# We need entries here only for a few specialized cases where the behavior
# of the cast function differs from the datatype's I/O functions.  Otherwise,
# parse_coerce.c will generate CoerceViaIO operations without any prompting.
# Note that the castcontext values specified here should be no stronger than
# parse_coerce.c's automatic casts ('a' to text, 'e' from text) else odd
# behavior will ensue when the automatic cast is applied instead of the
# pg_cast entry!
{ castsource => 'cidr', casttarget => 'text', castfunc => 'text(inet)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'inet', casttarget => 'text', castfunc => 'text(inet)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'bool', casttarget => 'text', castfunc => 'text(bool)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'xml', casttarget => 'text', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'text', casttarget => 'xml', castfunc => 'xml',
  castcontext => 'e', castmethod => 'f' },

# Cross-category casts to and from VARCHAR
# We support all the same casts as for TEXT.
{ castsource => 'cidr', casttarget => 'varchar', castfunc => 'text(inet)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'inet', casttarget => 'varchar', castfunc => 'text(inet)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'bool', casttarget => 'varchar', castfunc => 'text(bool)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'xml', casttarget => 'varchar', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'varchar', casttarget => 'xml', castfunc => 'xml',
  castcontext => 'e', castmethod => 'f' },

# Cross-category casts to and from BPCHAR
# We support all the same casts as for TEXT.
{ castsource => 'cidr', casttarget => 'bpchar', castfunc => 'text(inet)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'inet', casttarget => 'bpchar', castfunc => 'text(inet)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'bool', casttarget => 'bpchar', castfunc => 'text(bool)',
  castcontext => 'a', castmethod => 'f' },
{ castsource => 'xml', casttarget => 'bpchar', castfunc => '0',
  castcontext => 'a', castmethod => 'b' },
{ castsource => 'bpchar', casttarget => 'xml', castfunc => 'xml',
  castcontext => 'e', castmethod => 'f' },

# Length-coercion functions
{ castsource => 'bpchar', casttarget => 'bpchar',
  castfunc => 'bpchar(bpchar,int4,bool)', castcontext => 'i',
  castmethod => 'f' },
{ castsource => 'varchar', casttarget => 'varchar',
  castfunc => 'varchar(varchar,int4,bool)', castcontext => 'i',
  castmethod => 'f' },
{ castsource => 'time', casttarget => 'time', castfunc => 'time(time,int4)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'timestamp', casttarget => 'timestamp',
  castfunc => 'timestamp(timestamp,int4)', castcontext => 'i',
  castmethod => 'f' },
{ castsource => 'timestamptz', casttarget => 'timestamptz',
  castfunc => 'timestamptz(timestamptz,int4)', castcontext => 'i',
  castmethod => 'f' },
{ castsource => 'interval', casttarget => 'interval',
  castfunc => 'interval(interval,int4)', castcontext => 'i',
  castmethod => 'f' },
{ castsource => 'timetz', casttarget => 'timetz',
  castfunc => 'timetz(timetz,int4)', castcontext => 'i', castmethod => 'f' },
{ castsource => 'bit', casttarget => 'bit', castfunc => 'bit(bit,int4,bool)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'varbit', casttarget => 'varbit', castfunc => 'varbit',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'numeric', casttarget => 'numeric',
  castfunc => 'numeric(numeric,int4)', castcontext => 'i', castmethod => 'f' },

# json to/from jsonb
{ castsource => 'json', casttarget => 'jsonb', castfunc => '0',
  castcontext => 'a', castmethod => 'i' },
{ castsource => 'jsonb', casttarget => 'json', castfunc => '0',
  castcontext => 'a', castmethod => 'i' },

# jsonb to numeric and bool types
{ castsource => 'jsonb', casttarget => 'bool', castfunc => 'bool(jsonb)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'jsonb', casttarget => 'numeric', castfunc => 'numeric(jsonb)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'jsonb', casttarget => 'int2', castfunc => 'int2(jsonb)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'jsonb', casttarget => 'int4', castfunc => 'int4(jsonb)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'jsonb', casttarget => 'int8', castfunc => 'int8(jsonb)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'jsonb', casttarget => 'float4', castfunc => 'float4(jsonb)',
  castcontext => 'e', castmethod => 'f' },
{ castsource => 'jsonb', casttarget => 'float8', castfunc => 'float8(jsonb)',
  castcontext => 'e', castmethod => 'f' },

# complex type
{ castsource => 'float8', casttarget => 'complex', castfunc => 'float82complex(float8)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'float4', casttarget => 'complex', castfunc => 'float42complex(float4)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int8', casttarget => 'complex', castfunc => 'int82complex(int8)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int4', casttarget => 'complex', castfunc => 'int42complex(int4)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'int2', casttarget => 'complex', castfunc => 'int22complex(int2)',
  castcontext => 'i', castmethod => 'f' },
{ castsource => 'point', casttarget => 'complex', castfunc => '0',
  castcontext => 'e', castmethod => 'b' },
{ castsource => 'complex', casttarget => 'point', castfunc => '0',
  castcontext => 'e', castmethod => 'b' },
{ castsource => 'numeric', casttarget => 'complex', castfunc => 'numeric2complex(numeric)',
  castcontext => 'i', castmethod => 'f' },

# range to multirange
{ castsource => 'int4range', casttarget => 'int4multirange',
  castfunc => 'int4multirange(int4range)', castcontext => 'e',
  castmethod => 'f' },
{ castsource => 'int8range', casttarget => 'int8multirange',
  castfunc => 'int8multirange(int8range)', castcontext => 'e',
  castmethod => 'f' },
{ castsource => 'numrange', casttarget => 'nummultirange',
  castfunc => 'nummultirange(numrange)', castcontext => 'e',
  castmethod => 'f' },
{ castsource => 'daterange', casttarget => 'datemultirange',
  castfunc => 'datemultirange(daterange)', castcontext => 'e',
  castmethod => 'f' },
{ castsource => 'tsrange', casttarget => 'tsmultirange',
  castfunc => 'tsmultirange(tsrange)', castcontext => 'e', castmethod => 'f' },
{ castsource => 'tstzrange', casttarget => 'tstzmultirange',
  castfunc => 'tstzmultirange(tstzrange)', castcontext => 'e',
  castmethod => 'f' },
]