Define the interfaces to create column family modifications.
Applications can modify a Cloud Bigtable schema through a set of column family modifications. These modifications may include creating new column families, deleting existing column families, or changing the garbage collection rules for existing column families.
This class contain helper functions to create the different protos encapsulating these changes.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis documentation outlines the \u003ccode\u003eColumnFamilyModification\u003c/code\u003e class, which defines interfaces for modifying Cloud Bigtable schemas through operations like creating, deleting, and updating column families.\u003c/p\u003e\n"],["\u003cp\u003eThe class supports creating new column families via \u003ccode\u003eCreate()\u003c/code\u003e, updating existing ones with \u003ccode\u003eUpdate()\u003c/code\u003e, and deleting column families using \u003ccode\u003eDrop()\u003c/code\u003e, each taking the family ID and garbage collection rules as parameters.\u003c/p\u003e\n"],["\u003cp\u003eIt provides constructors and assignment operators for efficient object management, leveraging move and copy semantics for optimal performance.\u003c/p\u003e\n"],["\u003cp\u003eThe class features \u003ccode\u003eas_proto()\u003c/code\u003e methods to convert modifications into their protocol buffer representations, accommodating both const and rvalue references for flexible usage in different contexts.\u003c/p\u003e\n"],["\u003cp\u003eThe class is documented to have versions ranging from 2.11.0 to 2.37.0-rc, each with its respective documentation.\u003c/p\u003e\n"]]],[],null,["# Class ColumnFamilyModification (2.13.0)\n\nVersion 2.13.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/bigtable/latest/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.41.0](/cpp/docs/reference/bigtable/2.41.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.40.0](/cpp/docs/reference/bigtable/2.40.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.39.0](/cpp/docs/reference/bigtable/2.39.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.38.0](/cpp/docs/reference/bigtable/2.38.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.37.0](/cpp/docs/reference/bigtable/2.37.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.36.0](/cpp/docs/reference/bigtable/2.36.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.35.0](/cpp/docs/reference/bigtable/2.35.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.34.0](/cpp/docs/reference/bigtable/2.34.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.33.0](/cpp/docs/reference/bigtable/2.33.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.32.0](/cpp/docs/reference/bigtable/2.32.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.31.0](/cpp/docs/reference/bigtable/2.31.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.30.0](/cpp/docs/reference/bigtable/2.30.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.29.0](/cpp/docs/reference/bigtable/2.29.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.28.0](/cpp/docs/reference/bigtable/2.28.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.27.0](/cpp/docs/reference/bigtable/2.27.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.26.0](/cpp/docs/reference/bigtable/2.26.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.25.1](/cpp/docs/reference/bigtable/2.25.1/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.24.0](/cpp/docs/reference/bigtable/2.24.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.23.0](/cpp/docs/reference/bigtable/2.23.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.22.1](/cpp/docs/reference/bigtable/2.22.1/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.21.0](/cpp/docs/reference/bigtable/2.21.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.20.0](/cpp/docs/reference/bigtable/2.20.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.19.0](/cpp/docs/reference/bigtable/2.19.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.18.0](/cpp/docs/reference/bigtable/2.18.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.17.0](/cpp/docs/reference/bigtable/2.17.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.16.0](/cpp/docs/reference/bigtable/2.16.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.15.1](/cpp/docs/reference/bigtable/2.15.1/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.14.0](/cpp/docs/reference/bigtable/2.14.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.13.0](/cpp/docs/reference/bigtable/2.13.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.12.0](/cpp/docs/reference/bigtable/2.12.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification)\n- [2.11.0](/cpp/docs/reference/bigtable/2.11.0/classgoogle_1_1cloud_1_1bigtable_1_1ColumnFamilyModification) \nDefine the interfaces to create column family modifications. \nApplications can modify a Cloud Bigtable schema through a set of column family modifications. These modifications may include creating new column families, deleting existing column families, or changing the garbage collection rules for existing column families.\n\nThis class contain helper functions to create the different protos encapsulating these changes.\n\nConstructors\n------------\n\n### ColumnFamilyModification(ColumnFamilyModification \\&\\&)\n\nUse default constructors and assignments.\n\n### ColumnFamilyModification(ColumnFamilyModification const \\&)\n\nUse default constructors and assignments.\n\nOperators\n---------\n\n### operator=(ColumnFamilyModification \\&\\&)\n\nUse default constructors and assignments.\n\n### operator=(ColumnFamilyModification const \\&)\n\nUse default constructors and assignments.\n\nFunctions\n---------\n\n### static Create(std::string, GcRule)\n\nReturn a modification that creates a new column family.\n\n### static Update(std::string, GcRule)\n\nReturn a modification that creates a new column family.\n\n### static Drop(std::string)\n\nReturn a modification that drops the `id` column family.\n\n### as_proto() const \\&\n\nConvert to the proto form.\n\n### as_proto() \\&\\&\n\nMove out the underlying proto contents."]]
