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Created page with '==Working Inside Schema 'test'== : <code> CREATE TABLE test.xxx </code> :: data types are changed in <code> appendColumnType() </code> in ''PostgreSQLSchemaManager.java'' based …'
==Working Inside Schema 'test'==
: <code> CREATE TABLE test.xxx </code>
:: data types are changed in <code> appendColumnType() </code> in ''PostgreSQLSchemaManager.java'' based on each jdbc type's equivalent in PostgreSQL.
:: The implementation in <code> crateTextTable </code> in file ''PostgreSQLSchemaManager.java'' is removed for now (base class's version is being called).
: <code>CREATE INDEX test.xxx </code>
: <code> CREATE Trigger test.xxx // if it's needed for PostgreSQL as well as MySQL</code>
* Modifications
{|class="collapsible collapsed" style="border-style:solid;border-width:thin;border-color:black"
!align="left" style="background-color:SteelBlue; font-weight:bold;border-style:solid;border-width:thin;padding: 2px 2px 2px 2px;"| '''Changes Done to MySQL adapter'''
|-
|
: When a connection is first established, this initial SQL statement should execute in MySQL, which is not the case for PostgreSQL, so it was commented out:
::
<source lang=java>
/* MySQLAdapter.java */
public String getInitialSQL()
{
StringBuffer buf = new StringBuffer();
buf.append("set sql_mode = concat(@@sql_mode, ',ANSI_QUOTES')"); // allow using doublequote when quoting column names in "CREATE TABLE" statements
buf.append(";set optimizer_search_depth = 0"); // let DB automatically decide on how long it takes to examine plans, improves long planning sessions
buf.append(";set max_sort_length = ").append
(Math.max(MAX_VARCHAR_PRECISION, MAX_VARBINARY_PRECISION)); // set TEXT/BLOB minimum sorting length to be same as cutoff between varchar/text
return buf.toString();
}
</source>
: Also the same line should be commented out in postgresql_create.sql script, which is being used to create tables in the database 'test':
::
<source lang=java>
/* nexj/core/persistence/sql/etc/postgresql_create.sql */
set sql_mode = concat(@@sql_mode, ',ANSI_QUOTES');
</source>
: After activating the connection, the database is locked.
: In MySQL, the storage engine is set to a transactional safe engine such as [http://www.wikivs.com/wiki/MySQL_vs_PostgreSQL#MySQL:InnoDB InnoDB], whereas PostgreSQL has a single built in engine. So, changes needed to be done to this script:
::
<source lang=java>
create table test.Account(
id binary(16) not null, contactId binary(16) not null, account Type varchar(16) character set utf8 not null, funds double null,
constraint Account_PK primary key(id)
)engine=innoDB;
</source>
|}
{|class="collapsible collapsed" style="border-style:solid;border-width:thin;border-color:black"
!align="left" style="background-color:SteelBlue; font-weight:bold;border-style:solid;border-width:thin;padding: 2px 2px 2px 2px;"| '''Files to Configure'''
|-
|
:src
:: [[ PostgreSQL_Adapter-nexj/Adapter | PostgreSQLAdapter.java ]] // Extends SQLAdapter.java - SQL Persistence adapter, responsible for regular data queries (insert, select, delete)
:: [[ PostgreSQL_Adapter-nexj/SchemaManger | PostgreSQLSchemaManager.java ]] // Extends SQLSchemaManager.java - class for reading, creating and upgrading the database schema
:: [[ PostgreSQL_Adapter-nexj/Upgrade | main.upgrade ]]
: test
:: [[ PostgreSQL_Adapter-nexj/AdapterTest | PostgreSQLAdapterTest.java ]]] // Extends SQLAdapterTest.java
:: [[ PostgreSQL_Adapter-nexj/SchemaMangerTest | PostgreSQLSchemaManagerTest.java ]] // Extends SQLSchemaManagerTest.java
: Script - scripts are being processed through SQLDataTest.java
:: postgresql_setup.sql
:: TO be cond'
|}
: <code> CREATE TABLE test.xxx </code>
:: data types are changed in <code> appendColumnType() </code> in ''PostgreSQLSchemaManager.java'' based on each jdbc type's equivalent in PostgreSQL.
:: The implementation in <code> crateTextTable </code> in file ''PostgreSQLSchemaManager.java'' is removed for now (base class's version is being called).
: <code>CREATE INDEX test.xxx </code>
: <code> CREATE Trigger test.xxx // if it's needed for PostgreSQL as well as MySQL</code>
* Modifications
{|class="collapsible collapsed" style="border-style:solid;border-width:thin;border-color:black"
!align="left" style="background-color:SteelBlue; font-weight:bold;border-style:solid;border-width:thin;padding: 2px 2px 2px 2px;"| '''Changes Done to MySQL adapter'''
|-
|
: When a connection is first established, this initial SQL statement should execute in MySQL, which is not the case for PostgreSQL, so it was commented out:
::
<source lang=java>
/* MySQLAdapter.java */
public String getInitialSQL()
{
StringBuffer buf = new StringBuffer();
buf.append("set sql_mode = concat(@@sql_mode, ',ANSI_QUOTES')"); // allow using doublequote when quoting column names in "CREATE TABLE" statements
buf.append(";set optimizer_search_depth = 0"); // let DB automatically decide on how long it takes to examine plans, improves long planning sessions
buf.append(";set max_sort_length = ").append
(Math.max(MAX_VARCHAR_PRECISION, MAX_VARBINARY_PRECISION)); // set TEXT/BLOB minimum sorting length to be same as cutoff between varchar/text
return buf.toString();
}
</source>
: Also the same line should be commented out in postgresql_create.sql script, which is being used to create tables in the database 'test':
::
<source lang=java>
/* nexj/core/persistence/sql/etc/postgresql_create.sql */
set sql_mode = concat(@@sql_mode, ',ANSI_QUOTES');
</source>
: After activating the connection, the database is locked.
: In MySQL, the storage engine is set to a transactional safe engine such as [http://www.wikivs.com/wiki/MySQL_vs_PostgreSQL#MySQL:InnoDB InnoDB], whereas PostgreSQL has a single built in engine. So, changes needed to be done to this script:
::
<source lang=java>
create table test.Account(
id binary(16) not null, contactId binary(16) not null, account Type varchar(16) character set utf8 not null, funds double null,
constraint Account_PK primary key(id)
)engine=innoDB;
</source>
|}
{|class="collapsible collapsed" style="border-style:solid;border-width:thin;border-color:black"
!align="left" style="background-color:SteelBlue; font-weight:bold;border-style:solid;border-width:thin;padding: 2px 2px 2px 2px;"| '''Files to Configure'''
|-
|
:src
:: [[ PostgreSQL_Adapter-nexj/Adapter | PostgreSQLAdapter.java ]] // Extends SQLAdapter.java - SQL Persistence adapter, responsible for regular data queries (insert, select, delete)
:: [[ PostgreSQL_Adapter-nexj/SchemaManger | PostgreSQLSchemaManager.java ]] // Extends SQLSchemaManager.java - class for reading, creating and upgrading the database schema
:: [[ PostgreSQL_Adapter-nexj/Upgrade | main.upgrade ]]
: test
:: [[ PostgreSQL_Adapter-nexj/AdapterTest | PostgreSQLAdapterTest.java ]]] // Extends SQLAdapterTest.java
:: [[ PostgreSQL_Adapter-nexj/SchemaMangerTest | PostgreSQLSchemaManagerTest.java ]] // Extends SQLSchemaManagerTest.java
: Script - scripts are being processed through SQLDataTest.java
:: postgresql_setup.sql
:: TO be cond'
|}
