Difference between revisions of "PostgreSQl Adatper-nexj/research notes SQLSchemaManager"
| Line 11: | Line 11: | ||
SQLAdatper (m_adapter), SQLAppender (m_appender), SQLConnection (m_connection) | SQLAdatper (m_adapter), SQLAppender (m_appender), SQLConnection (m_connection) | ||
| − | * Note: What does SQLAppender do? It might help us to understand what the append methods do in the SQLAdapter class. | + | * Note: What does SQLAppender do? It might help us to understand what the append methods do |
| + | in the SQLAdapter class. | ||
- the constructor that takes a reference to an SQLAdapter: | - the constructor that takes a reference to an SQLAdapter: | ||
| Line 22: | Line 23: | ||
B. A List of 18 Abstract Methods | B. A List of 18 Abstract Methods | ||
| − | * Note: Some of the abstract methods are implemented in the MySQLSchemaManager class to return null. | + | * Note: Some of the abstract methods are implemented in the MySQLSchemaManager class |
| + | to return null. | ||
1. abstract void analyzeTable(Table table) | 1. abstract void analyzeTable(Table table) | ||
| Line 91: | Line 93: | ||
| − | 14. protected abstract SQLSchemaManager.SQLAppender getDynamicSQLAppender(java.lang.StringBuffer buf) | + | 14. protected abstract SQLSchemaManager.SQLAppender getDynamicSQLAppender( |
| + | java.lang.StringBuffer buf) | ||
Wraps a string buffer with an appender for generating dynamic SQL. | Wraps a string buffer with an appender for generating dynamic SQL. | ||
Revision as of 09:38, 20 January 2011
1/19/2011 (Peter Liu)
Summary of reading the javadoc documentation of the SQLSchemaManager class
A. The Structure of SQLSchemaManager
- 4 inner classes, 1 inner interface
- 3 protected instance variables (relevant to our project):
SQLAdatper (m_adapter), SQLAppender (m_appender), SQLConnection (m_connection)
* Note: What does SQLAppender do? It might help us to understand what the append methods do
in the SQLAdapter class.
- the constructor that takes a reference to an SQLAdapter:
protected SQLSchemaManager(SQLAdapter adapter)
- 18 abstract methods
B. A List of 18 Abstract Methods
* Note: Some of the abstract methods are implemented in the MySQLSchemaManager class
to return null.
1. abstract void analyzeTable(Table table)
Appends the SQL statements to gather statistics for a given table to the SQL appender.
2. protected abstract void appendColumnType(java.lang.StringBuffer buf,
Column column)
Appends a table column type declaration to a string buffer.
3. protected abstract java.lang.StringBuffer appendConcatenate(
java.lang.StringBuffer buf,
java.lang.CharSequence[] argArray)
Concatenate all values in the list with valid SQL syntax.
4. protected abstract void appendPrint(java.lang.StringBuffer buf,
java.lang.String sMsg)
Appends the SQL for printing a message to a string buffer.
5. protected abstract java.lang.StringBuffer appendTSExtract(
java.lang.StringBuffer buf,
java.lang.CharSequence sTS, byte nField)
Extract nField from sTS with valid SQL syntax.
6. protected abstract java.lang.StringBuffer appendTSIncrement(
java.lang.StringBuffer buf,
java.lang.CharSequence sTS,
java.lang.CharSequence sDelta,
byte nField)
Increment sTS by sDelta with valid SQL syntax.
7. protected abstract void appendUpgradeStepEnd(
java.lang.StringBuffer buf,
RelationalSchema schema,
SchemaVersion version,
SchemaVersion prev,
java.lang.String sFailMsg)
Appends the SQL for ending an upgrade step to a string buffer.
8. protected abstract void appendUpgradeStepStart(
java.lang.StringBuffer buf,
RelationalSchema schema,
SchemaVersion version)
Appends the SQL for starting an upgrade step to a string buffer.
9. protected abstract java.lang.String getCreateEtcScriptName()
10. protected abstract java.lang.String getDefaultIndexspace()
11. protected abstract java.lang.String getDefaultLongspace()
12. protected abstract java.lang.String getDefaultTablespace()
13. protected abstract java.lang.String getDropEtcScriptName()
14. protected abstract SQLSchemaManager.SQLAppender getDynamicSQLAppender(
java.lang.StringBuffer buf)
Wraps a string buffer with an appender for generating dynamic SQL.
15. protected abstract java.lang.String getGUIDExpr()
16. protected abstract java.lang.String getNowExpr()
17. abstract java.lang.String getSeparator()
18. protected abstract java.lang.String getSetupEtcScriptName()
