The INSERT query with Object value fails with the root exception:
Caused by: org.postgresql.util.PSQLException: Unsupported Types value: 2,000
at org.postgresql.jdbc2.AbstractJdbc2Statement.setObject(AbstractJdbc2Statement.java:1858)
...

Insert query [1], source specific command [2], postgres table [3], teiid vdb[4].

[1] INSERT INTO smalla VALUES (55,'0',NULL,'-24',-24.00,-24,-24.0,-128,

,

,

,0,'1',-32768,-24,-24,'-24')

[2] INSERT INTO smalla (IntKey, StringKey, IntNum, StringNum, FloatNum, LongNum, DoubleNum, ByteNum, DateValue, TimeValue, TimestampValue, BooleanValue, CharValue, ShortValue, BigIntegerValue, BigDecimalValue, ObjectValue) VALUES (55, '0', NULL, '-24', -24.0, -24, -24.0, -128, DATE '2000-01-01', TIME '00:00:00', TIMESTAMP '2000-01-01 00:00:00.0', FALSE, '1', -32768, -24, -24, ?)

[3]
create table SmallA (StringNum varchar(15),
IntNum integer,
DoubleNum double precision,
StringKey varchar(15),
BigDecimalValue numeric(15,5),
IntKey integer,
ByteNum smallint,
DateValue date,
TimeValue time,
TimestampValue timestamp,
BooleanValue boolean,
CharValue char(1),
ShortValue smallint,
FloatNum real,
LongNum bigint,
BigIntegerValue numeric(15,0),
ObjectValue text);

[4]
<vdb name="vdb-tmp" version="1">
<model name="Source">
<source name="local" translator-name="postgresql" connection-jndi-name="java:/localPostgreSQL"/>
<metadata type="DDL"><![CDATA[
CREATE FOREIGN TABLE smalla(IntKey integer, StringKey string, IntNum integer, StringNum string, FloatNum float, LongNum long, DoubleNum double, ByteNum byte, DateValue date, TimeValue time, TimestampValue timestamp, BooleanValue boolean, CharValue char, ShortValue short, BigIntegerValue biginteger, BigDecimalValue bigdecimal, ObjectValue object) OPTIONS (UPDATABLE 'TRUE');
]]>
</metadata>
</model>
</vdb>