[#285] Updated documentation

h2/src/docsrc/help/help.csv

@@ -201,7 +201,7 @@ ALTER INDEX IDXNAME RENAME TO IDX_TEST_NAME
 "
 
 "Commands (DDL)","ALTER SCHEMA RENAME","
-ALTER SCHEMA schema RENAME TO newSchemaName
+ALTER SCHEMA [ IF EXISTS ] schema RENAME TO newSchemaName
 ","
 Renames a schema.
 This command commits an open transaction in this connection.
@@ -224,7 +224,7 @@ ALTER SEQUENCE SEQ_ID RESTART WITH 1000
 "
 
 "Commands (DDL)","ALTER TABLE ADD","
-ALTER TABLE tableName ADD [ COLUMN ]
+ALTER TABLE [ IF EXISTS ] tableName ADD [ COLUMN ]
 { [ IF NOT EXISTS ] columnDefinition [ { BEFORE | AFTER } columnName ]
     | ( { columnDefinition } [,...] ) }
 ","
@@ -235,7 +235,7 @@ ALTER TABLE TEST ADD CREATEDATE TIMESTAMP
 "
 
 "Commands (DDL)","ALTER TABLE ADD CONSTRAINT","
-ALTER TABLE tableName ADD constraint [ CHECK | NOCHECK ]
+ALTER TABLE [ IF EXISTS ] tableName ADD constraint [ CHECK | NOCHECK ]
 ","
 Adds a constraint to a table. If NOCHECK is specified, existing rows are not
 checked for consistency (the default is to check consistency for existing rows).
@@ -247,7 +247,7 @@ ALTER TABLE TEST ADD CONSTRAINT NAME_UNIQUE UNIQUE(NAME)
 "
 
 "Commands (DDL)","ALTER TABLE RENAME CONSTRAINT","
-ALTER TABLE tableName RENAME oldConstraintName TO newConstraintName
+ALTER TABLE [ IF EXISTS ] tableName RENAME oldConstraintName TO newConstraintName
 ","
 Renames a constraint.
 This command commits an open transaction in this connection.
@@ -256,7 +256,7 @@ ALTER TABLE TEST RENAME CONSTRAINT FOO TO BAR
 "
 
 "Commands (DDL)","ALTER TABLE ALTER COLUMN","
-ALTER TABLE tableName ALTER COLUMN columnName
+ALTER TABLE [ IF EXISTS ] tableName ALTER COLUMN columnName
 { { dataType [ DEFAULT expression ] [ [ NOT ] NULL ] [ AUTO_INCREMENT | IDENTITY ] }
     | { RENAME TO name }
     | { RESTART WITH long }
@@ -298,7 +298,7 @@ ALTER TABLE TEST ALTER COLUMN NAME SET NULL;
 "
 
 "Commands (DDL)","ALTER TABLE DROP COLUMN","
-ALTER TABLE tableName DROP COLUMN [ IF EXISTS ] ( columnName [,...] )
+ALTER TABLE [ IF EXISTS ] tableName DROP COLUMN [ IF EXISTS ] ( columnName [,...] )
 ","
 Removes column(s) from a table.
 This command commits an open transaction in this connection.
@@ -308,7 +308,7 @@ ALTER TABLE TEST DROP COLUMN NAME1, NAME2
 "
 
 "Commands (DDL)","ALTER TABLE DROP CONSTRAINT","
-ALTER TABLE tableName DROP { CONSTRAINT [ IF EXISTS ] constraintName | PRIMARY KEY }
+ALTER TABLE [ IF EXISTS ] tableName DROP { CONSTRAINT [ IF EXISTS ] constraintName | PRIMARY KEY }
 ","
 Removes a constraint or a primary key from a table.
 This command commits an open transaction in this connection.
@@ -317,7 +317,7 @@ ALTER TABLE TEST DROP CONSTRAINT UNIQUE_NAME
 "
 
 "Commands (DDL)","ALTER TABLE SET","
-ALTER TABLE tableName SET REFERENTIAL_INTEGRITY
+ALTER TABLE [ IF EXISTS ] tableName SET REFERENTIAL_INTEGRITY
     { FALSE | TRUE [ CHECK | NOCHECK ] }
 ","
 Disables or enables referential integrity checking for a table. This command can
@@ -332,7 +332,7 @@ ALTER TABLE TEST SET REFERENTIAL_INTEGRITY FALSE
 "
 
 "Commands (DDL)","ALTER TABLE RENAME","
-ALTER TABLE tableName RENAME TO newName
+ALTER TABLE [ IF EXISTS ] tableName RENAME TO newName
 ","
 Renames a table.
 This command commits an open transaction in this connection.

h2/src/docsrc/html/changelog.html

@@ -40,7 +40,7 @@ table with an LOB column.
 </li>
 <li>Issue #235: Anonymous SSL connections fail in many situations
 </li>
-<li>Fix race condition in FILE_LOCK=SOCKET, which could result in the watchdog thread not running  
+<li>Fix race condition in FILE_LOCK=SOCKET, which could result in the watchdog thread not running
 </li>
 <li>Experimental support for datatype TIMESTAMP WITH TIMEZONE
 </li>
@@ -48,6 +48,16 @@ table with an LOB column.
 </li>
 <li>Add support for PostgreSQL ALTER TABLE ... RENAME COLUMN .. TO ...
 </li>
+<li>Add support for ALTER SCHEMA [ IF EXISTS ]
+</li>
+<li>Add support for ALTER TABLE [ IF EXISTS ]
+</li>
+<li>Add support for ALTER VIEW [ IF EXISTS ]
+</li>
+<li>Add support for ALTER INDE [ IF EXISTS ]
+</li>
+<li>Add support for ALTER SEQUENCE [ IF EXISTS ]
+</li>
 <li>Improve performance of cleaning up temp tables - patch from Eric Faulhaber.
 </li>
 <li>Fix bug where table locks were not dropped when the connection closed

h2/src/main/org/h2/res/help.csv

@@ -71,7 +71,7 @@ ALTER INDEX [ IF EXISTS ] indexName RENAME TO newIndexName
 ","
 Renames an index."
 "Commands (DDL)","ALTER SCHEMA RENAME","
-ALTER SCHEMA schema RENAME TO newSchemaName
+ALTER SCHEMA [ IF EXISTS ] schema RENAME TO newSchemaName
 ","
 Renames a schema."
 "Commands (DDL)","ALTER SEQUENCE","
@@ -83,21 +83,21 @@ ALTER SEQUENCE [ IF EXISTS ] sequenceName [ RESTART WITH long ] [ INCREMENT BY l
 ","
 Changes the parameters of a sequence."
 "Commands (DDL)","ALTER TABLE ADD","
-ALTER TABLE tableName ADD [ COLUMN ]
+ALTER TABLE [ IF EXISTS ] tableName ADD [ COLUMN ]
 { [ IF NOT EXISTS ] columnDefinition [ { BEFORE | AFTER } columnName ]
     | ( { columnDefinition } [,...] ) }
 ","
 Adds a new column to a table."
 "Commands (DDL)","ALTER TABLE ADD CONSTRAINT","
-ALTER TABLE tableName ADD constraint [ CHECK | NOCHECK ]
+ALTER TABLE [ IF EXISTS ] tableName ADD constraint [ CHECK | NOCHECK ]
 ","
 Adds a constraint to a table."
 "Commands (DDL)","ALTER TABLE RENAME CONSTRAINT","
-ALTER TABLE tableName RENAME oldConstraintName TO newConstraintName
+ALTER TABLE [ IF EXISTS ] tableName RENAME oldConstraintName TO newConstraintName
 ","
 Renames a constraint."
 "Commands (DDL)","ALTER TABLE ALTER COLUMN","
-ALTER TABLE tableName ALTER COLUMN columnName
+ALTER TABLE [ IF EXISTS ] tableName ALTER COLUMN columnName
 { { dataType [ DEFAULT expression ] [ [ NOT ] NULL ] [ AUTO_INCREMENT | IDENTITY ] }
     | { RENAME TO name }
     | { RESTART WITH long }
@@ -109,20 +109,20 @@ ALTER TABLE tableName ALTER COLUMN columnName
 Changes the data type of a column, rename a column,
 change the identity value, or change the selectivity."
 "Commands (DDL)","ALTER TABLE DROP COLUMN","
-ALTER TABLE tableName DROP COLUMN [ IF EXISTS ] ( columnName [,...] )
+ALTER TABLE [ IF EXISTS ] tableName DROP COLUMN [ IF EXISTS ] ( columnName [,...] )
 ","
 Removes column(s) from a table."
 "Commands (DDL)","ALTER TABLE DROP CONSTRAINT","
-ALTER TABLE tableName DROP { CONSTRAINT [ IF EXISTS ] constraintName | PRIMARY KEY }
+ALTER TABLE [ IF EXISTS ] tableName DROP { CONSTRAINT [ IF EXISTS ] constraintName | PRIMARY KEY }
 ","
 Removes a constraint or a primary key from a table."
 "Commands (DDL)","ALTER TABLE SET","
-ALTER TABLE tableName SET REFERENTIAL_INTEGRITY
+ALTER TABLE [ IF EXISTS ] tableName SET REFERENTIAL_INTEGRITY
     { FALSE | TRUE [ CHECK | NOCHECK ] }
 ","
 Disables or enables referential integrity checking for a table."
 "Commands (DDL)","ALTER TABLE RENAME","
-ALTER TABLE tableName RENAME TO newName
+ALTER TABLE [ IF EXISTS ] tableName RENAME TO newName
 ","
 Renames a table."
 "Commands (DDL)","ALTER USER ADMIN","