If creating a table with the same name, then the old table it renamed to XXX$n where "XXX" is the original name and "n" is a version number. You can then access it using this name XXX$n and copy data to the new table with the requested transformation (if the schemas are not the same).
To see all versions of the table use the statement "select * from Metatable".
Please refer to the below samples.
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XSQL>create table t (x integer);
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XSQL>select * from Metatable;
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TableName FieldNo FieldName FieldTypeName FieldType FieldSize AutoGenerated ReferencedTable
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------------------------------------------------------------------------------
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t 1 x Int4 6 0 false null
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Selected records: 1
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XSQL>create table t (x double);
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XSQL>select * from Metatable;
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TableName FieldNo FieldName FieldTypeName FieldType FieldSize AutoGenerated ReferencedTable
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------------------------------------------------------------------------------
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t$1 1 x Int4 6 0 false null
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t 1 x Real8 11 0 false null
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Selected records: 2
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XSQL>create table t (x int(8), s string);
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XSQL>select * from Metatable;
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TableName FieldNo FieldName FieldTypeName FieldType FieldSize AutoGenerated ReferencedTable
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------------------------------------------------------------------------------
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t$1 1 x Int4 6 0 false null
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t$2 1 x Real8 11 0 false null
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t 1 x Int8 8 0 false null
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t 2 s String 14 0 false null
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Selected records: 4
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