[ http://issues.apache.org/jira/browse/DDLUTILS-73?page=all ]
Thomas Dudziak updated DDLUTILS-73:
-----------------------------------
Component: Core - PostgreSql
> SQL syntax bug in PostgreSQL 8.1 for ALTER COLUMN
> -------------------------------------------------
>
> Key: DDLUTILS-73
> URL: http://issues.apache.org/jira/browse/DDLUTILS-73
> Project: DdlUtils
> Type: Bug
> Components: Core - PostgreSql
> Environment: PostgreSQL 8.1
> Reporter: Vignesh Swaminathan
> Assignee: Thomas Dudziak
>
> The following code has to be added to PostgreSQLBuilder class to make it work
> for altering columns in PostgreSQL
> /**
> * Generates the alter statement to add or modify a single column on a
> table.
> *
> * @param table The table the index is on
> * @param column The column to drop
> * @param isNewColumn Whether the column should be added
> */
> public void writeColumnAlterStmt(Table table, Column column, boolean
> isNewColumn) throws IOException
> {
> writeTableAlterStmt(table);
> print(isNewColumn ? "ADD " : "ALTER ");
> if(isNewColumn)
> writeColumn(table, column);
> else
> writeAlterColumn(table, column);
> printEndOfStatement();
> }
>
> /**
> * Outputs the DDL for the specified column.
> *
> * @param table The table containing the column
> * @param column The column
> */
> protected void writeAlterColumn(Table table, Column column) throws
> IOException
> {
> //see comments in columnsDiffer about null/"" defaults
> printIdentifier(getColumnName(column));
> print(" TYPE ");
> print(getSqlType(column));
> if ((column.getDefaultValue() != null) ||
> (getPlatformInfo().isIdentitySpecUsesDefaultValue() &&
> column.isAutoIncrement()))
> {
> if (!getPlatformInfo().isSupportingDefaultValuesForLongTypes() &&
> ((column.getTypeCode() == Types.LONGVARBINARY) ||
> (column.getTypeCode() == Types.LONGVARCHAR)))
> {
> throw new DynaSqlException("The platform does not support
> default values for LONGVARCHAR or LONGVARBINARY columns");
> }
> print(" DEFAULT ");
> writeColumnDefaultValue(table, column);
> }
> if (column.isRequired())
> {
> print(" ");
> writeColumnNotNullableStmt();
> }
> else if (getPlatformInfo().isRequiringNullAsDefaultValue() &&
> getPlatformInfo().hasNullDefault(column.getTypeCode()))
> {
> print(" ");
> writeColumnNullableStmt();
> }
> if (column.isAutoIncrement() &&
> !getPlatformInfo().isIdentitySpecUsesDefaultValue())
> {
> if (!getPlatformInfo().isSupportingNonPKIdentityColumns() &&
> !column.isPrimaryKey())
> {
> throw new DynaSqlException("Column "+column.getName()+" in
> table "+table.getName()+" is auto-incrementing but not a primary key column,
> which is not supported by the platform");
> }
> print(" ");
> writeColumnAutoIncrementStmt(table, column);
> }
> }
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