Naming conventions

Product shortcut

the product shortcut consists of two uppercase, alphanumeric characters representing the product, as detailed in the following table.

Environment shortcut

The environment shortcut consists of two uppercase, alphanumeric characters representing the environment, as detailed in the following table.

Table shortcut

The table shortcut consists of two uppercase, alphanumeric characters representing the table. For example, the table that holds hour group details has the shortcut "HG."

Table short name

The table short name consists of four uppercase, alphanumeric characters representing the concatenation of:

• Environment shortcut and table shortcut (in case of a PMDB Statistics and Events table)
• Product shortcut and table shortcut (in case of a Product Internal table)

Table description

The table description is a string describing the table's role and content. It can consist of uppercase letters, numbers, and the underscore character.

Index description

The index description is a string describing the index’s role and content. It can consist of uppercase letters, numbers, and the underscore character.

Column description

The column description is a string describing the column's role and content. It can consist of uppercase letters, numbers, and the underscore character.

Foreign Key description

The foreign key description is a string describing the foreign key's role and content. It can consist of uppercase letters, numbers, and the underscore character.

Table name

PMDB events table

The format for an Events table follows this convention:

PW_[environment shortcut][table shortcut]_[table description]

Due to Oracle limitations, the length of a table name cannot exceed 30 characters. For example, the table PW_ORIE_INSTANCE_EXCEPTIONS is interpreted as follows:

• PW For all PMDB tables
• ORIE For the environment shortcut (OR) and the table shortcut (IE)
• INSTANCE_EXCEPTIONS For the description of the table

PMDB statistics table

The format for a Statistics table follows this convention:

PW_[environment shortcut][table shortcut]_[table description]_[summary level]

where the summary level comprises one character of one of the following values:

• H For an hourly summary level
• D For a daily summary level
• W For a weekly summary level
• M For a monthly summary level

Due to Oracle limitations, the length of a table name cannot exceed 30 characters. For example, the table PW_ORIS_INSTANCE_STATISTICS_H is interpreted as follows:

• PW For all PMDB table
• ORIS For the environment shortcut (OR) and the table shortcut (IS)
• INSTANCE_STATISTICS For the description of the table
• H For the summary level (hourly)

View name

The view name does not follow any specific convention.

Index Name

The PMDB events table index

The format for an index of an Events table follows this convention:

IW_[table short name]_[index description]

Due to internal limitations, the index name cannot exceed 18 characters. For example, the index IW_ORIW_ID is interpreted as follows:

• IW For all PMDB table indexes
• ORIW For the short name of the table PW_ORIW_INSTANCE_EXCEPTIONS
• ID For the description of the index

PMDB statistics table index

The format for an index of a Statistics table follows this convention:

IW_[table short name]_[index description]_[summary level]

where the summary level comprises one character of one of the following values:

• H For an hourly summary level
• D For a daily summary level
• W For a weekly summary level
• M For a monthly summary level

Due to internal limitations, the index name cannot exceed 18 characters. For example, the index IW_ORIS_ID_H is interpreted as follows:

• IW For all PMDB table indexes
• ORIS For the short name of the table PW_ORIS_INSTANCE_STATISTICS_H
• ID For the description of the index
• H For the summary level (hourly)

Column name

Events table column name

The format for a column name in an Events follows this convention:

[table short name]_[column description]

where the column description describes the column role and content; it can consist of uppercase letters, numbers, and the underscore character.

Due to Oracle limitations, the column name cannot exceed 30 characters. For example, the column name PWLH_TYPE is interpreted as follows:

• PWLH For the product PMDB (PW) and the short description of the table (LH)
• TYPE For the description of the column

For naming conventions of columns that are foreign keys, see Foreign key name.

Statistics table column name

Column names in Statistics tables follow the same naming convention as those in Events tables but add an additional element if the column type is one of the following: SUM, AVG, MIN, or MAX. In this case, SUM, AVG, MIN, or MAX are attached.

Foreign key name

The foreign key constraint name follows this convention:

FK_[referencing table short name]_[referenced table short name]_[foreign key description]

Due to internal limitations, the foreign key cannot exceed 18 characters, which means that the foreign key description is limited to five characters. For example, the foreign key name FK_PWHM_PWHG_ID is interpreted as follows:

• FK For all foreign keys
• PWHM For the short name of the referencing table
• PWHG For the short name of the referenced table
• ID For the foreign key description

Foreign key column name

The foreign key column names consist of the table short name and the column name of the reference primary key. For example, a foreign key in the table PS_PWHM_HOUR_MAPPING referencing the column PWHM_ID of the table PS_PWHG_HOUR_GROUPS should be called PWHM_PWHG_ID.

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