IBM DB2 to PostgreSQL Migration Tools and Services

SQLines provides tools and services to help you transfer data, convert database schema (DDL), views, stored procedures, functions, triggers, queries and SQL scripts from IBM DB2 to PostgreSQL.

  • IBM DB2 for LUW and z/OS 10.x, 9.x, 8.x and 7.x
  • PostgreSQL 9.x and 8.x

Data Types

Data type mapping between DB2 and PostgreSQL:

DB2 PostgreSQL
1 BIGINT 64-bit integer BIGINT
2 BLOB(n) Binary large object, 1 ⇐ n ⇐ 2G BYTEA
3 CHAR(n), CHARACTER(n) Fixed-length string, 1 ⇐ n ⇐ 254 CHAR(n), CHARACTER(n)
4 CHAR(n) FOR BIT DATA Fixed-length byte string, 1 ⇐ n ⇐ 254 BYTEA
5 CHARACTER VARYING(n) Variable-length string, 1 ⇐ n ⇐ 32672 VARCHAR(n)
6 CLOB(n) Character large object, 1 ⇐ n ⇐ 2G TEXT
7 DATE Date (year, month and day) DATE
8 DBCLOB(n) UTF-16 character large object, 1 ⇐ n ⇐ 1G TEXT
9 DECIMAL(p,s), DEC(p,s) Fixed-point number DECIMAL(p,s), DEC(p,s)
10 DECFLOAT(16 | 34) IEEE floating-point number FLOAT
11 DOUBLE [PRECISION] Double-precision floating-point number DOUBLE PRECISION
12 FLOAT(p) Double-precision floating-point number DOUBLE PRECISION
13 GRAPHIC(n) Fixed-length UTF-16 string, 1 ⇐ n ⇐ 127 CHAR(n)
14 INTEGER, INT 32-bit integer INTEGER, INT
15 NCHAR(n) Fixed-length UTF-16 string, 1 ⇐ n ⇐ 127 CHAR(n)
16 NCHAR VARYING(n) Varying-length UTF-16 string, 1 ⇐ n ⇐ 16336 VARCHAR(n)
17 NCLOB(n) UTF-16 character large object, 1 ⇐ n ⇐ 1G TEXT
18 NUMERIC(p,s), NUM(p,s) Fixed-point number NUMERIC(p,s)
19 NVARCHAR(n) Varying-length UTF-16 string, 1 ⇐ n ⇐ 16336 VARCHAR(n)
20 REAL Single-precision floating-point number REAL
21 SMALLINT 16-bit integer SMALLINT
22 TIME Time (hour, minute, and second) TIME(0)
23 TIMESTAMP(p) Date and time with fraction TIMESTAMP(p)
24 VARCHAR(n) Variable-length string, 1 ⇐ n ⇐ 32672 VARCHAR(n)
25 VARCHAR(n) FOR BIT DATA Variable-length byte string, 1 ⇐ n ⇐ 32672 BYTEA
26 VARGRAPHIC(n) Variable-length UTF-16 string, 1 ⇐ n ⇐ 16336 VARCHAR(n)
27 XML XML data XML