diff --git a/lib/impure/db_postgres.nim b/lib/impure/db_postgres.nim
index 60bd1f0814..fc587b5df6 100644
--- a/lib/impure/db_postgres.nim
+++ b/lib/impure/db_postgres.nim
@@ -69,16 +69,14 @@ import db_common
 export db_common
 
 type
-  DbConn* = PPGconn   ## encapsulates a database connection
-  Row* = seq[string]  ## a row of a dataset. NULL database values will be
-                      ## converted to nil.
-  InstantRow* = tuple[res: PPGresult, line: int32]  ## a handle that can be
-                                                    ## used to get a row's
-                                                    ## column text on demand
+  DbConn* = PPGconn    ## encapsulates a database connection
+  Row* = seq[string]   ## a row of a dataset. NULL database values will be
+                       ## converted to nil.
+  InstantRow* = object ## a handle that can be
+    res: PPGresult     ## used to get a row's
+    line: int          ## column text on demand             
   SqlPrepared* = distinct string ## a identifier for the prepared queries
-
-{.deprecated: [TRow: Row, TDbConn: DbConn,
-              TSqlPrepared: SqlPrepared].}
+{.deprecated: [TRow: Row, TDbConn: DbConn, TSqlPrepared: SqlPrepared].}
 
 proc dbError*(db: DbConn) {.noreturn.} =
   ## raises a DbError exception.
@@ -213,7 +211,7 @@ iterator instantRows*(db: DbConn, query: SqlQuery,
   ## on demand using []. Returned handle is valid only within iterator body.
   var res = setupQuery(db, query, args)
   for i in 0..pqNtuples(res)-1:
-    yield (res: res, line: i)
+    yield InstantRow(res: res, line: i)
   pqClear(res)
 
 iterator instantRows*(db: DbConn, stmtName: SqlPrepared,
@@ -223,16 +221,170 @@ iterator instantRows*(db: DbConn, stmtName: SqlPrepared,
   ## on demand using []. Returned handle is valid only within iterator body.
   var res = setupQuery(db, stmtName, args)
   for i in 0..pqNtuples(res)-1:
-    yield (res: res, line: i)
+    yield InstantRow(res: res, line: i)
   pqClear(res)
 
-proc `[]`*(row: InstantRow, col: int32): string {.inline.} =
-  ## returns text for given column of the row
-  $pqgetvalue(row.res, row.line, col)
+proc getColumnType(res: PPGresult, col: int) : DbType =
+  ## returns DbType for given column in the row
+  ## defined in pg_type.h file in the postgres source code
+  ## Wire representation for types: http://www.npgsql.org/dev/types.html
+  var oid = pqftype(res, int32(col))
+  ## The integer returned is the internal OID number of the type
+  case oid
+  of 16: return DbType(kind: DbTypeKind.dbBool, name: "bool")
+  of 17: return DbType(kind: DbTypeKind.dbBlob, name: "bytea")
 
-proc len*(row: InstantRow): int32 {.inline.} =
+  of 21:   return DbType(kind: DbTypeKind.dbInt, name: "int2", size: 2)
+  of 23:   return DbType(kind: DbTypeKind.dbInt, name: "int4", size: 4)
+  of 20:   return DbType(kind: DbTypeKind.dbInt, name: "int8", size: 8)
+  of 1560: return DbType(kind: DbTypeKind.dbBit, name: "bit")  
+  of 1562: return DbType(kind: DbTypeKind.dbInt, name: "varbit")
+
+  of 18:   return DbType(kind: DbTypeKind.dbFixedChar, name: "char")
+  of 19:   return DbType(kind: DbTypeKind.dbFixedChar, name: "name")
+  of 1042: return DbType(kind: DbTypeKind.dbFixedChar, name: "bpchar")
+
+  of 25:   return DbType(kind: DbTypeKind.dbVarchar, name: "text")
+  of 1043: return DbType(kind: DbTypeKind.dbVarChar, name: "varchar")
+  of 2275: return DbType(kind: DbTypeKind.dbVarchar, name: "cstring")
+
+  of 700: return DbType(kind: DbTypeKind.dbFloat, name: "float4")
+  of 701: return DbType(kind: DbTypeKind.dbFloat, name: "float8")
+
+  of 790:  return DbType(kind: DbTypeKind.dbDecimal, name: "money")  
+  of 1700: return DbType(kind: DbTypeKind.dbDecimal, name: "numeric")
+
+  of 704:  return DbType(kind: DbTypeKind.dbTimeInterval, name: "tinterval")
+  of 702:  return DbType(kind: DbTypeKind.dbTimestamp, name: "abstime")
+  of 703:  return DbType(kind: DbTypeKind.dbTimeInterval, name: "reltime")
+  of 1082: return DbType(kind: DbTypeKind.dbDate, name: "date")
+  of 1083: return DbType(kind: DbTypeKind.dbTime, name: "time")
+  of 1114: return DbType(kind: DbTypeKind.dbTimestamp, name: "timestamp")
+  of 1184: return DbType(kind: DbTypeKind.dbTimestamp, name: "timestamptz")
+  of 1186: return DbType(kind: DbTypeKind.dbTimeInterval, name: "interval")
+  of 1266: return DbType(kind: DbTypeKind.dbTime, name: "timetz")
+
+  of 114:  return DbType(kind: DbTypeKind.dbJson, name: "json")
+  of 142:  return DbType(kind: DbTypeKind.dbXml, name: "xml")
+  of 3802: return DbType(kind: DbTypeKind.dbJson, name: "jsonb")
+
+  of 600: return DbType(kind: DbTypeKind.dbPoint, name: "point")
+  of 601: return DbType(kind: DbTypeKind.dbLseg, name: "lseg")
+  of 602: return DbType(kind: DbTypeKind.dbPath, name: "path")
+  of 603: return DbType(kind: DbTypeKind.dbBox, name: "box")
+  of 604: return DbType(kind: DbTypeKind.dbPolygon, name: "polygon")
+  of 628: return DbType(kind: DbTypeKind.dbLine, name: "line")
+  of 718: return DbType(kind: DbTypeKind.dbCircle, name: "circle")  
+
+  of 650: return DbType(kind: DbTypeKind.dbInet, name: "cidr")
+  of 829: return DbType(kind: DbTypeKind.dbMacAddress, name: "macaddr")
+  of 869: return DbType(kind: DbTypeKind.dbInet, name: "inet")
+  
+  of 2950: return DbType(kind: DbTypeKind.dbVarchar, name: "uuid")
+  of 3614: return DbType(kind: DbTypeKind.dbVarchar, name: "tsvector")
+  of 3615: return DbType(kind: DbTypeKind.dbVarchar, name: "tsquery")
+  of 2970: return DbType(kind: DbTypeKind.dbVarchar, name: "txid_snapshot")
+
+  of 27:   return DbType(kind: DbTypeKind.dbComposite, name: "tid")
+  of 1790: return DbType(kind: DbTypeKind.dbComposite, name: "refcursor")
+  of 2249: return DbType(kind: DbTypeKind.dbComposite, name: "record")
+  of 3904: return DbType(kind: DbTypeKind.dbComposite, name: "int4range")
+  of 3906: return DbType(kind: DbTypeKind.dbComposite, name: "numrange")
+  of 3908: return DbType(kind: DbTypeKind.dbComposite, name: "tsrange")
+  of 3910: return DbType(kind: DbTypeKind.dbComposite, name: "tstzrange")
+  of 3912: return DbType(kind: DbTypeKind.dbComposite, name: "daterange")
+  of 3926: return DbType(kind: DbTypeKind.dbComposite, name: "int8range")
+
+  of 22:   return DbType(kind: DbTypeKind.dbArray, name: "int2vector")
+  of 30:   return DbType(kind: DbTypeKind.dbArray, name: "oidvector")
+  of 143:  return DbType(kind: DbTypeKind.dbArray, name: "xml[]")
+  of 199:  return DbType(kind: DbTypeKind.dbArray, name: "json[]")
+  of 629:  return DbType(kind: DbTypeKind.dbArray, name: "line[]")
+  of 651:  return DbType(kind: DbTypeKind.dbArray, name: "cidr[]")
+  of 719:  return DbType(kind: DbTypeKind.dbArray, name: "circle[]")
+  of 791:  return DbType(kind: DbTypeKind.dbArray, name: "money[]")
+  of 1000: return DbType(kind: DbTypeKind.dbArray, name: "bool[]")
+  of 1001: return DbType(kind: DbTypeKind.dbArray, name: "bytea[]")
+  of 1002: return DbType(kind: DbTypeKind.dbArray, name: "char[]")
+  of 1003: return DbType(kind: DbTypeKind.dbArray, name: "name[]")
+  of 1005: return DbType(kind: DbTypeKind.dbArray, name: "int2[]")
+  of 1006: return DbType(kind: DbTypeKind.dbArray, name: "int2vector[]")
+  of 1007: return DbType(kind: DbTypeKind.dbArray, name: "int4[]")
+  of 1008: return DbType(kind: DbTypeKind.dbArray, name: "regproc[]")
+  of 1009: return DbType(kind: DbTypeKind.dbArray, name: "text[]")
+  of 1028: return DbType(kind: DbTypeKind.dbArray, name: "oid[]")
+  of 1010: return DbType(kind: DbTypeKind.dbArray, name: "tid[]")
+  of 1011: return DbType(kind: DbTypeKind.dbArray, name: "xid[]")
+  of 1012: return DbType(kind: DbTypeKind.dbArray, name: "cid[]")
+  of 1013: return DbType(kind: DbTypeKind.dbArray, name: "oidvector[]")
+  of 1014: return DbType(kind: DbTypeKind.dbArray, name: "bpchar[]")
+  of 1015: return DbType(kind: DbTypeKind.dbArray, name: "varchar[]")
+  of 1016: return DbType(kind: DbTypeKind.dbArray, name: "int8[]")
+  of 1017: return DbType(kind: DbTypeKind.dbArray, name: "point[]")
+  of 1018: return DbType(kind: DbTypeKind.dbArray, name: "lseg[]")
+  of 1019: return DbType(kind: DbTypeKind.dbArray, name: "path[]")
+  of 1020: return DbType(kind: DbTypeKind.dbArray, name: "box[]")
+  of 1021: return DbType(kind: DbTypeKind.dbArray, name: "float4[]")
+  of 1022: return DbType(kind: DbTypeKind.dbArray, name: "float8[]")
+  of 1023: return DbType(kind: DbTypeKind.dbArray, name: "abstime[]")
+  of 1024: return DbType(kind: DbTypeKind.dbArray, name: "reltime[]")
+  of 1025: return DbType(kind: DbTypeKind.dbArray, name: "tinterval[]")
+  of 1027: return DbType(kind: DbTypeKind.dbArray, name: "polygon[]")
+  of 1040: return DbType(kind: DbTypeKind.dbArray, name: "macaddr[]")
+  of 1041: return DbType(kind: DbTypeKind.dbArray, name: "inet[]")
+  of 1263: return DbType(kind: DbTypeKind.dbArray, name: "cstring[]")
+  of 1115: return DbType(kind: DbTypeKind.dbArray, name: "timestamp[]")
+  of 1182: return DbType(kind: DbTypeKind.dbArray, name: "date[]")
+  of 1183: return DbType(kind: DbTypeKind.dbArray, name: "time[]")
+  of 1185: return DbType(kind: DbTypeKind.dbArray, name: "timestamptz[]")
+  of 1187: return DbType(kind: DbTypeKind.dbArray, name: "interval[]")
+  of 1231: return DbType(kind: DbTypeKind.dbArray, name: "numeric[]")
+  of 1270: return DbType(kind: DbTypeKind.dbArray, name: "timetz[]")
+  of 1561: return DbType(kind: DbTypeKind.dbArray, name: "bit[]")
+  of 1563: return DbType(kind: DbTypeKind.dbArray, name: "varbit[]")
+  of 2201: return DbType(kind: DbTypeKind.dbArray, name: "refcursor[]")
+  of 2951: return DbType(kind: DbTypeKind.dbArray, name: "uuid[]")
+  of 3643: return DbType(kind: DbTypeKind.dbArray, name: "tsvector[]")
+  of 3645: return DbType(kind: DbTypeKind.dbArray, name: "tsquery[]")
+  of 3807: return DbType(kind: DbTypeKind.dbArray, name: "jsonb[]")
+  of 2949: return DbType(kind: DbTypeKind.dbArray, name: "txid_snapshot[]")
+  of 3905: return DbType(kind: DbTypeKind.dbArray, name: "int4range[]")
+  of 3907: return DbType(kind: DbTypeKind.dbArray, name: "numrange[]")
+  of 3909: return DbType(kind: DbTypeKind.dbArray, name: "tsrange[]")
+  of 3911: return DbType(kind: DbTypeKind.dbArray, name: "tstzrange[]")
+  of 3913: return DbType(kind: DbTypeKind.dbArray, name: "daterange[]")
+  of 3927: return DbType(kind: DbTypeKind.dbArray, name: "int8range[]")
+  of 2287: return DbType(kind: DbTypeKind.dbArray, name: "record[]")
+
+  of 705:  return DbType(kind: DbTypeKind.dbUnknown, name: "unknown")
+  else: return DbType(kind: DbTypeKind.dbUnknown, name: $oid) ## Query the system table pg_type to determine exactly which type is referenced.
+
+proc setColumnInfo(columns: var DbColumns; res: PPGresult; L: int32) =
+  setLen(columns, L)
+  for i in 0..<L:
+    columns[i].name = $pqfname(res, i)
+    columns[i].typ = getColumnType(res, i)
+    columns[i].tableName = $(pqftable(res, i)) ## Returns the OID of the table from which the given column was fetched.
+                                               ## Query the system table pg_class to determine exactly which table is referenced.  
+    #columns[i].primaryKey = libpq does not have a function for that
+    #columns[i].foreignKey = libpq does not have a function for that
+
+iterator instantRows*(db: DbConn; columns: var DbColumns; query: SqlQuery;
+                      args: varargs[string, `$`]): InstantRow
+                      {.tags: [ReadDbEffect].} =
+  var res = setupQuery(db, query, args)
+  setColumnInfo(columns, res, pqnfields(res))
+  for i in 0..<pqntuples(res):
+    yield InstantRow(res: res, line: i)
+  pqClear(res)
+
+proc `[]`*(row: InstantRow; col: int): string {.inline.} =
+  ## returns text for given column of the row
+  $pqgetvalue(row.res, int32(row.line), int32(col))
+
+proc len*(row: InstantRow): int {.inline.} =
   ## returns number of columns in the row
-  pqNfields(row.res)
+  int(pqNfields(row.res))
 
 proc getRow*(db: DbConn, query: SqlQuery,
              args: varargs[string, `$`]): Row {.tags: [ReadDbEffect].} =
diff --git a/tests/untestable/tpostgres.nim b/tests/untestable/tpostgres.nim
index dcbdaad399..486d0d7031 100644
--- a/tests/untestable/tpostgres.nim
+++ b/tests/untestable/tpostgres.nim
@@ -76,7 +76,236 @@ for i in 1..10:
   echo(name)
   discard db.getRow(
     SqlQuery("INSERT INTO tags(name) VALUES(\'$1\') RETURNING id" % [name]))
+    
+# get column details
+db.exec(SqlQuery("DROP TABLE IF EXISTS dbtypes;"))
+db.exec(SqlQuery("DROP TYPE IF EXISTS custom_enum;"))
+db.exec(SqlQuery("CREATE TYPE custom_enum AS ENUM ('1', '2', '3');"))
+db.exec(SqlQuery("DROP TYPE IF EXISTS custom_composite;"))
+db.exec(SqlQuery("CREATE TYPE custom_composite AS (r double precision, i double precision);"))
+db.exec(SqlQuery("""CREATE TABLE dbtypes(
+                    id serial UNIQUE,
+                    bytea_col bytea,
+                    smallint_col smallint,
+                    integer_col integer,
+                    bigint_col bigint,
+                    decimal_col decimal,
+                    numeric_col numeric,
+                    real_col real,
+                    double_precision_col double precision,
+                    smallserial_col smallserial,
+                    serial_col serial,
+                    bigserial_col bigserial,
+                    money_col money,
+                    varchar_col varchar(10),
+                    character_col character(1),
+                    text_col text,
+                    timestamp_col timestamp,
+                    date_col date,
+                    time_col time,
+                    interval_col interval,
+                    bool_col boolean,
+                    custom_enum_col custom_enum,
+                    point_col point,
+                    line_col line,
+                    lseg_col lseg,
+                    box_col box,
+                    path_col path,
+                    polygon_col polygon,
+                    circle_col circle,
+                    cidr_col cidr,
+                    inet_col inet,
+                    macaddr_col macaddr,
+                    bit_col bit,
+                    varbit_col bit(3),
+                    tsvector_col tsvector,
+                    tsquery_col tsquery,
+                    uuid_col uuid,
+                    xml_col xml,
+                    json_col json,
+                    array_col integer[],
+                    custom_composite_col custom_composite,
+                    range_col int4range
+                    );"""))
+db.exec(SqlQuery("INSERT INTO dbtypes (id) VALUES(0);"))
 
+var dbCols : DbColumns = @[]
+for row in db.instantRows(dbCols, sql"SELECT * FROM dbtypes"):
+  doAssert len(dbCols) == 42
+
+doAssert dbCols[0].name == "id"
+doAssert dbCols[0].typ.kind == DbTypeKind.dbInt
+doAssert dbCols[0].typ.name == "int4"
+doAssert dbCols[0].typ.size == 4
+
+doAssert dbCols[1].name == "bytea_col"
+doAssert dbCols[1].typ.kind == DbTypeKind.dbBlob
+doAssert dbCols[1].typ.name == "bytea"
+
+doAssert dbCols[2].name == "smallint_col"
+doAssert dbCols[2].typ.kind == DbTypeKind.dbInt
+doAssert dbCols[2].typ.name == "int2"
+doAssert dbCols[2].typ.size == 2
+
+doAssert dbCols[3].name == "integer_col"
+doAssert dbCols[3].typ.kind == DbTypeKind.dbInt
+doAssert dbCols[3].typ.name == "int4"
+doAssert dbCols[3].typ.size == 4
+
+doAssert dbCols[4].name == "bigint_col"
+doAssert dbCols[4].typ.kind == DbTypeKind.dbInt
+doAssert dbCols[4].typ.name == "int8"
+doAssert dbCols[4].typ.size == 8
+
+doAssert dbCols[5].name == "decimal_col"
+doAssert dbCols[5].typ.kind == DbTypeKind.dbDecimal
+doAssert dbCols[5].typ.name == "numeric"
+
+doAssert dbCols[6].name == "numeric_col"
+doAssert dbCols[6].typ.kind == DbTypeKind.dbDecimal
+doAssert dbCols[6].typ.name == "numeric"
+
+doAssert dbCols[7].name == "real_col"
+doAssert dbCols[7].typ.kind == DbTypeKind.dbFloat
+doAssert dbCols[7].typ.name == "float4"
+
+doAssert dbCols[8].name == "double_precision_col"
+doAssert dbCols[8].typ.kind == DbTypeKind.dbFloat
+doAssert dbCols[8].typ.name == "float8"
+
+doAssert dbCols[9].name == "smallserial_col"
+doAssert dbCols[9].typ.kind == DbTypeKind.dbInt
+doAssert dbCols[9].typ.name == "int2"
+
+doAssert dbCols[10].name == "serial_col"
+doAssert dbCols[10].typ.kind == DbTypeKind.dbInt
+doAssert dbCols[10].typ.name == "int4"
+
+doAssert dbCols[11].name == "bigserial_col"
+doAssert dbCols[11].typ.kind == DbTypeKind.dbInt
+doAssert dbCols[11].typ.name == "int8"
+
+doAssert dbCols[12].name == "money_col"
+doAssert dbCols[12].typ.kind == DbTypeKind.dbDecimal
+doAssert dbCols[12].typ.name == "money"    
+    
+doAssert dbCols[13].name == "varchar_col"
+doAssert dbCols[13].typ.kind == DbTypeKind.dbVarchar
+doAssert dbCols[13].typ.name == "varchar"
+
+doAssert dbCols[14].name == "character_col"
+doAssert dbCols[14].typ.kind == DbTypeKind.dbFixedChar
+doAssert dbCols[14].typ.name == "bpchar"
+
+doAssert dbCols[15].name == "text_col"
+doAssert dbCols[15].typ.kind == DbTypeKind.dbVarchar
+doAssert dbCols[15].typ.name == "text"
+
+doAssert dbCols[16].name == "timestamp_col"
+doAssert dbCols[16].typ.kind == DbTypeKind.dbTimestamp
+doAssert dbCols[16].typ.name == "timestamp"
+
+doAssert dbCols[17].name == "date_col"
+doAssert dbCols[17].typ.kind == DbTypeKind.dbDate
+doAssert dbCols[17].typ.name == "date"
+
+doAssert dbCols[18].name == "time_col"
+doAssert dbCols[18].typ.kind == DbTypeKind.dbTime
+doAssert dbCols[18].typ.name == "time"
+
+doAssert dbCols[19].name == "interval_col"
+doAssert dbCols[19].typ.kind == DbTypeKind.dbTimeInterval
+doAssert dbCols[19].typ.name == "interval"
+
+doAssert dbCols[20].name == "bool_col"
+doAssert dbCols[20].typ.kind == DbTypeKind.dbBool
+doAssert dbCols[20].typ.name == "bool"
+
+doAssert dbCols[21].name == "custom_enum_col"
+doAssert dbCols[21].typ.kind == DbTypeKind.dbUnknown
+doAssert parseInt(dbCols[21].typ.name) > 0
+    
+doAssert dbCols[22].name == "point_col"
+doAssert dbCols[22].typ.kind == DbTypeKind.dbPoint
+doAssert dbCols[22].typ.name == "point"    
+
+doAssert dbCols[23].name == "line_col"
+doAssert dbCols[23].typ.kind == DbTypeKind.dbLine
+doAssert dbCols[23].typ.name == "line"    
+
+doAssert dbCols[24].name == "lseg_col"
+doAssert dbCols[24].typ.kind == DbTypeKind.dbLseg
+doAssert dbCols[24].typ.name == "lseg"    
+
+doAssert dbCols[25].name == "box_col"
+doAssert dbCols[25].typ.kind == DbTypeKind.dbBox
+doAssert dbCols[25].typ.name == "box"    
+
+doAssert dbCols[26].name == "path_col"
+doAssert dbCols[26].typ.kind == DbTypeKind.dbPath
+doAssert dbCols[26].typ.name == "path"    
+
+doAssert dbCols[27].name == "polygon_col"
+doAssert dbCols[27].typ.kind == DbTypeKind.dbPolygon
+doAssert dbCols[27].typ.name == "polygon"
+
+doAssert dbCols[28].name == "circle_col"
+doAssert dbCols[28].typ.kind == DbTypeKind.dbCircle
+doAssert dbCols[28].typ.name == "circle"
+
+doAssert dbCols[29].name == "cidr_col"
+doAssert dbCols[29].typ.kind == DbTypeKind.dbInet
+doAssert dbCols[29].typ.name == "cidr"
+
+doAssert dbCols[30].name == "inet_col"
+doAssert dbCols[30].typ.kind == DbTypeKind.dbInet
+doAssert dbCols[30].typ.name == "inet"
+
+doAssert dbCols[31].name == "macaddr_col"
+doAssert dbCols[31].typ.kind == DbTypeKind.dbMacAddress
+doAssert dbCols[31].typ.name == "macaddr"
+
+doAssert dbCols[32].name == "bit_col"
+doAssert dbCols[32].typ.kind == DbTypeKind.dbBit
+doAssert dbCols[32].typ.name == "bit"
+
+doAssert dbCols[33].name == "varbit_col"
+doAssert dbCols[33].typ.kind == DbTypeKind.dbBit
+doAssert dbCols[33].typ.name == "bit"
+
+doAssert dbCols[34].name == "tsvector_col"
+doAssert dbCols[34].typ.kind == DbTypeKind.dbVarchar
+doAssert dbCols[34].typ.name == "tsvector"
+
+doAssert dbCols[35].name == "tsquery_col"
+doAssert dbCols[35].typ.kind == DbTypeKind.dbVarchar
+doAssert dbCols[35].typ.name == "tsquery"
+
+doAssert dbCols[36].name == "uuid_col"
+doAssert dbCols[36].typ.kind == DbTypeKind.dbVarchar
+doAssert dbCols[36].typ.name == "uuid"
+
+doAssert dbCols[37].name == "xml_col"
+doAssert dbCols[37].typ.kind == DbTypeKind.dbXml
+doAssert dbCols[37].typ.name == "xml"
+
+doAssert dbCols[38].name == "json_col"
+doAssert dbCols[38].typ.kind == DbTypeKind.dbJson
+doAssert dbCols[38].typ.name == "json"
+
+doAssert dbCols[39].name == "array_col"
+doAssert dbCols[39].typ.kind == DbTypeKind.dbArray
+doAssert dbCols[39].typ.name == "int4[]"
+
+doAssert dbCols[40].name == "custom_composite_col"
+doAssert dbCols[40].typ.kind == DbTypeKind.dbUnknown
+doAssert parseInt(dbCols[40].typ.name) > 0
+
+doAssert dbCols[41].name == "range_col"
+doAssert dbCols[41].typ.kind == DbTypeKind.dbComposite
+doAssert dbCols[41].typ.name == "int4range"
+    
 echo("All tests succeeded!")
 
 db.close()
+