#Postgresql for loop cursor update
#Postgresql for loop cursor code

There are two different ways of using cursors: in FETCH clauses and in FOR loops. When is specified a date as a literal it is necessary to use always the to_date function with the correspondent format mask.In dates comparisons is often needed a default date when the reference is null, Januor Decemshould be used.PostgreSQL does not support labels like > (but it can be commented out).If you use this form fix it to use 1 as start character instead of 0 to guarantee that it works in both databases. Oracle allows SUBSTR(text, 0, Y) also and treats its like SUBSTR(text, 1, Y). PostgreSQL/SQL standard count characters in SUBSTR starting from 1.PostgreSQL does not support INSTR command with three parameters.

#Postgresql for loop cursor update

PostgreSQL does the SELECT FOR UPDATE at a table level while Oracle does it at a column level.

To guarantee that it will also work in PostgreSQL. But if the we are working with Oracle's NVarchar type this will cause an ORA-12704: character set mismatch error, to fix it it is possible to use coalesce(to_char(myNVarCharVariable), )||'a'.

Notice that in Oracle null||'a' will return 'a' but in PostgrSQL null, so the solution would be coalesce(null,'')||'a' that will return the same for both.

It's is recommended to use a COALESCE or initialize the variable to ''.

In PostgreSQL any string concatenated to a NULL string generates a NULL string as result.

DBMS_OUTPUT should be done in a single line to enable the automatic translator building the comment.

PostgreSQL requires () in calls to functions without parameters.

The same functionality can be achieved using SELECT and replacing the variables with parameters manually.

PostgreSQL does not support EXECUTE IMMEDIATE.

For example, use v_IsProcessing instead of IsProcessing.

Both Oracle and PostgreSQL do not support using variable names that match column table names.

BEGIN, END and ROLLBACK should be used instead to achieve the same functionality.

PostgreSQL does not support SAVEPOINT.

Throwing an exception produces a ROLLBACK. It does automatically an explicit COMMIT between BEGIN END blocks. An active checking of register to update should be used.

PostgreSQL does not support the CURRENT OF clause.PostgreSQL does not support parameters like '1' in the ORDER BY or GROUP BY clause.DELETE FROM Table should be used instead. PostgreSQL does not support the DELETE TABLE command.PostgreSQL does not support using the table name in the fields to update.PostgreSQL does not support synonyms of tables in UPDATE, INSERT or DELETE operations.When a SELECT is inside a FROM clause a synonym is needed.When checking for a null variable special care is required. PostgreSQL/SQL standard treat (empty string) and NULL differently.If the variable is the result of concatenating several strings () are required. If the CASE is NULL the format is:ĬASE WHEN variable IS NULL THEN X ELSE Y END Replace oracle specific DECODE commands by CASE.Replace oracle specific NVL commands by COALESCE.To get the same functionality that GOTO use boolean control variables and IF/THEN statements to check if the conditions are TRUE/FALSE. Do not use GOTO since PostgreSQL does not support it.If it is a NUMERIC variable use TO_NUMBER(?). In XSQL we use a questionmark (?) as parameter placeholder.

#Postgresql for loop cursor code

Change the code replacing the (+) by LEFT JOIN or RIGHT JOIN This a list of general rules that assure that PL runs properly on different database backgrounds. Note: It is strongly recommended to avoid (when possible) using PL/SQL when writing new code and write it using DAL instead. To help developers to test if their code can be translated by dbsourcemanager the ant export.database command contains an Translation consistency check which does the complete standardization/translation cycle once and reports and differences found (ignoring whitespace). So they point out many features/constructs which oracle adds on top of the SQL standard and which are thus oracle specific and not available in PostgreSQL. These recommendations assume that you have written code in Oracle and that you want to port it to PostgreSQL. This is a set of recommendations for writing Procedure Language that works on both database backends (when possible) or that can be automatically translated by DBSourceManager. Openbravo supports Oracle and PostgreSQL database engines. 1.1.7 Elements not supported by dbsource manager.