Sybase ASE to PostgreSQL Migration

SQLines tools help you transfer data, convert database schema (DDL), views, stored procedures, functions, triggers, queries and SQL scripts from SAP Sybase Adaptive Server Enterprise (Sybase ASE) to PostgreSQL.

Databases:

Sybase Adaptive Server Enterprise 16, 15, 12.x and 11.x
PostgreSQL 14.x, 13.x, 12.x, 11.x, 10.x and 9.x

Sybase ASE to PostgreSQL Migration Tools

SQLines tools to help you migrate from Sybase ASE to PostgreSQL:

Migration Reference

Technical information on migration from Sybase ASE to PostgreSQL:

SQL Language Elements

Converting SQL language elements:

	Sybase ASE		PostgreSQL
1	string1 + string2	String concatenation	string1 \|\| string2

Data Types

Converting data types:

	Sybase ASE		PostgreSQL
1	BIGDATETIME	Date and time with fraction	TIMESTAMP
2	BIGINT	64-bit integer	BIGINT
3	BIGTIME	Time (Hour, minute, second and fraction)	TIME
4	BINARY(n)	Fixed-length binary data, 1 ⇐ n ⇐ pagesize	BYTEA
5	BIT	0 or 1; NULL is not allowed	BOOLEAN
6	CHAR(n), CHARACTER(n)	Fixed-length string	CHAR(n), CHARACTER(n)
7	DATE	Date (year, month and day)	DATE
8	DATETIME	Date and time with fraction	TIMESTAMP
9	DECIMAL(p,s), DEC(p,s)	Fixed-point number	DECIMAL(p,s), DEC(p,s)
10	DOUBLE PRECISION	Double-precision floating-point number	DOUBLE PRECISION
11	FLOAT(p)	Floating-point number	DOUBLE PRECISION
12	IMAGE	Variable-length binary data, ⇐ 2G	BYTEA
13	INT, INTEGER	32-bit integer	INT, INTEGER
14	MONEY	64-bit currency amount	MONEY
15	NCHAR(n)	Fixed-length national character string	CHAR(n)
16	NUMERIC(p,s)	Fixed-point number	NUMERIC(p,s)
17	NVARCHAR(n)	Variable-length national character string	VARCHAR(n)
18	REAL	Single-precision floating-point number	REAL
19	SMALLDATETIME	Date and time	TIMESTAMP(0)
20	SMALLINT	16-bit integer	SMALLINT
21	SMALLMONEY	32-bit currency amount	MONEY
22	TEXT	Variable-length character data, ⇐ 2G	TEXT
23	TIME	Time (Hour, minute, second and fraction)	TIME
24	TINYINT	8-bit unsigned integer, 0 to 255	SMALLINT
25	UNICHAR(n)	Fixed-length Unicode string	CHAR(n)
26	UNITEXT	Variable-length Unicode data, ⇐ 1G	TEXT
27	UNIVARCHAR(n)	Variable-length Unicode string	VARCHAR(n)
28	UNSIGNED BIGINT	64-bit unsigned integer	NUMERIC(20)
29	UNSIGNED INT	32-bit unsigned integer	NUMERIC(10)
30	UNSIGNED SMALLINT	16-bit unsigned integer	NUMERIC(5)
31	VARBINARY(n)	Variable-length binary string	BYTEA
32	VARCHAR(n)	Variable-length string	VARCHAR(n)

Built-in SQL Functions

Converting built-in SQL functions from Sybase ASE to PostgreSQL:

	Sybase ASE		PostgreSQL
1	CHAR_LENGTH(string)	Number of characters in string	CHAR_LENGTH(string)
2	CHARINDEX(substring, string)	Get substring position in string	POSITION(substring IN string)
3	CONVERT(CHAR \| VARCHAR, exp)	Convert to string	TO_CHAR(exp)
4	DATEADD(dd, int, datetime)	Add days to datetime	datetime + INTERVAL 'int DAY'
4	DATEADD(dd, exp, datetime)	Add days to datetime	datetime + exp * INTERVAL '1 DAY'
5	GETDATE()	Get the current date and time	NOW()
6	SUBSTRING(string, start, length)	Return substring	SUBSTRING(string, start, length)

CREATE PROCEDURE Statement

Converting stored procedures from Sybase ASE to PostgreSQL:

	Sybase ASE		PostgreSQL
1	CREATE PROCEDURE name		CREATE OR REPLACE FUNCTION name
2	If RETURN is not specified		RETURNS VOID is added
3	AS		Changed AS $$
4	Declarations inside BEGIN block		DECLARE block is between AS and BEGIN clauses
5	END	End of procedure block	END; $$ LANGUAGE plpgsql;

Transact-SQL Statements

Converting procedural Transact-SQL statements used in stored procedures, functions and triggers from Sybase ASE to PostgreSQL:

Variable declaration and assignment:

	Sybase ASE		PostgreSQL
1	DECLARE @var [AS] datatype(len) [= default]	Variable declaration	var datatype(len) [:= default];

Flow-of-control statements:

	Sybase ASE		PostgreSQL
1	IF condition BEGIN … END	IF statement	IF condition THEN … END IF;
2	WHILE condition BEGIN … END	WHILE loop	WHILE condition LOOP … END LOOP;

Cursors operations and attributes:

	Sybase ASE		PostgreSQL
1	CLOSE cur DEALLOCATE [CURSOR] cur	Close a cursor	CLOSE cur;
2	@@SQLSTATUS = 0	Fetch was successful	FOUND

System Procedures

Converting system stored procedures from Sybase ASE to PostgreSQL:

	Sybase ASE		PostgreSQL
1	sp_addtype name, "basetype(len)", "not null"	Create a user-defined type	CREATE DOMAIN name AS basetype(len) NOT NULL
2	sp_bindrule name, "table.column"	Assign a rule to a table column	ALTER TABLE table ADD CHECK rule_condition

SQL Statements

Converting SQL statements from Sybase ASE to PostgreSQL:

	Sybase ASE		PostgreSQL
1	CREATE RULE name AS condition	Create a domain of acceptable values	Converted to a CHECK constraint

SQLines SQL Converter

SQLines Data

Migration to MariaDB

Migration to Oracle

Migration to SQL Server

Migration to MySQL

Migration to PostgreSQL

Migration to IBM DB2

Migration to Redshift

Migration to Snowflake

Migration to Apache Hive

Migration to Spark

Migration to Presto/Trino

Migration to Netezza

Migration to Greenplum

Migration to EsgynDB

Application Conversion

Database Reference