Catalog of PostgreSQL queries for finding information about a PostgreSQL database and its design problems

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There are 996 queries.

Seq nrNameGoalTypeData sourceLast updateLicense...
61Frequent names of database objects"Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find the names (identifiers) of user-defined database objects that occur at least twice as frequently as a name occurs in average. Also make sure that there is no duplication in play.Sofware measureINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:49MIT License
62Median and average number of subcomponents in the names of database objects"Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find the median and average (arithmetic mean) number of subcomponents in the names of user-defined database objects. The values could be used to compare different databases.Sofware measureINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:47MIT License
63Names of database objects (regular identifiers) that contain $Find names (identifiers) of user-defined database objects that are regular identifiers and contain the $ sign starting from the second position. "Note that dollar signs are not allowed in identifiers according to the letter of the SQL standard, so their use might render applications less portable." (PostgreSQL manual)Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:46MIT License
64Perhaps a too long name, which has been automatically shortenedFind names (identifiers) of user-defined database objects that are 63 bytes long. This is the longest permitted length of identifiers if the default value of the NAMEDATALEN parameter has not been changed. PostgreSQL shortens too long identifiers automatically. Automatic code modification could break it somewhere.Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:46MIT License
65Names of database objects that contain a digitFind the names (identifiers) of user-defined database objects that contain at least one digit. Names should be informative. Duplicates should be avoided. Digits in names are a possible sign of duplication of database objects or unclear names.GeneralINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:45MIT License
66Name starts or ends with spacesFind the names of user-defined database objects (must be delimited identifiers) that start or end with spaces.Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:45MIT License
67Names of database objects with perhaps too many subcomponents (terms)"Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) The number of subcomponents (terms) should not be too big. Find the names (identifiers) of user-defined database objects that perhaps contain too many subcomponents, assuming, that the separator of the components is "_".Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:44MIT License
68Names of database objects that contain dollar signFind names of database objects that contain a dollar sign ($) that is not the first symbol of the name. In PostgreSQL regular identifiers cannot start with $. However, $ can be used in other positions of the name. "Note that dollar signs are not allowed in identifiers according to the letter of the SQL standard, so their use might render applications less portable." (PostgreSQL documentation)Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:43MIT License
69Names of database objects that end with an underscoreFind names of database objects that end with a underscore.Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:42MIT License
70The same database object name is used repeatedly in case the same database object typeFind what database object names are used more than once in case the objects of the same type. If the names differ from each other only by digits or underscores, then consider these the same name. For instance, if there are base tables Person and Person2 (in the same schema or different schemas), then the query returns the name Person. Make sure that there is no duplication of implementation elements in the database.GeneralINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:42MIT License
71Frequency of lengths of the names of database objects"Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find how many names (identifiers) of database objects there are with different lengths. The values could be used to compare different databases.Sofware measureINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:39MIT License
72Median and average of the length of names of database objects by the object type"Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find the median length and average (arithmetic mean) length of the names (identifiers) of user-defined database objects by the object type. The values could be used to compare different databases.Sofware measureINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:37MIT License
73The longest names of database objects by object type"Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find the TOP 3 longest (identifiers) names of user-defined objects by their type. These could be the first candidates of renaming in order to give to database objects better names.Sofware measureINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:37MIT License
74Meaningless terms in namesFind names of database objects that contain terms "foo", "bar", "foobar", or "baz".Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:36MIT License
75Perhaps the name referes to multiple conceptsFind database objects that name contains words "and" (English) or "ja" (Estonian).Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:36MIT License
76Names of database objects that mix snake_case and camelCase/PascalCaseUse consistent style of naming. Prefer snake_case. Regular identifiers are stored in the PostgreSQL system catalog in lowercase. Thus, if you use, for instance the identifier thisIsLongTableName, then, for instance,in the pg_dump result you will see the table name thisislongtablename. If the name in the system catalog is thisIsLongTableName, then it means that the name is a delimited identifier, i.e., case sensitive.Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:35MIT License
77The number and percentage of different names of database objects by object type"Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Different objects should have different names. The smaller the percentage the less descriptive are the names in the database. Find the number of different names (identifiers) of user-defined database objects by the object type and compare it with the total number of database objects with this type. The values could be used to compare different databases.Sofware measureINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:35MIT License
78Names of database objects that perhaps end with a sequence numberFind the names (identifiers) of user-defined database objects that end with one or more digit. Names should be informative. Duplicates should be avoided. Digits in names are a possible sign of duplication of database objects or unclear names.Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:33MIT License
79Names of database objects that perhaps end with a sequence number (aggregate view)Find the number of names (identifiers) of user-defined database objects that end with one or more digit. Names should be informative. Duplicates should be avoided. Digits in names are a possible sign of duplication of database objects or unclear names.Sofware measureINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:33MIT License
80Stating the obvious (2)Find the names of database objects where the name of the database object contains a part of the name of the object type. For instance, the query finds base tables, were the name contains fragments _base, base_, _table, or table_.Problem detectionINFORMATION_SCHEMA+system catalog base tables2024-12-21 16:32MIT License