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This is a preparation step for allowing subscripting containers to transform only a prefix of an indirection list and modify the list in-place by removing the processed elements. Currently, all elements are consumed, and the list is set to NIL after transformation. In the following commit, subscripting containers will gain the flexibility to stop transformation when encountering an unsupported indirection and return the remaining indirections to the caller. Reviewed-by: Alexandra Wang <[email protected]> Reviewed-by: Andrew Dunstan <[email protected]> Reviewed-by: Matheus Alcantara <[email protected]> Reviewed-by: Jian He <[email protected]>

This change extends generic type subscripting to recognize dot notation (.) in addition to bracket notation ([]). While this does not yet provide full support for dot notation, it enables subscripting containers to process it in the future. For now, container-specific transform functions only handle subscripting indices and stop processing when encountering dot notation. It is up to individual containers to decide how to transform dot notation in subsequent updates. Authored-by: Nikita Glukhov <[email protected]> Reviewed-by: Alexandra Wang <[email protected]> Reviewed-by: Andrew Dunstan <[email protected]> Reviewed-by: Matheus Alcantara <[email protected]> Reviewed-by: Jian He <[email protected]>

This is a preparation step for a future commit that will reuse the aforementioned function. Authored-by: Nikita Glukhov <[email protected]> Reviewed-by: Alexandra Wang <[email protected]> Reviewed-by: Andrew Dunstan <[email protected]> Reviewed-by: Matheus Alcantara <[email protected]> Reviewed-by: Jian He <[email protected]>

This is a preparation step for a future commit that will reuse the aforementioned function. Co-authored-by: Nikita Glukhov <[email protected]> Co-authored-by: Alexandra Wang <[email protected]> Reviewed-by: Andrew Dunstan <[email protected]> Reviewed-by: Matheus Alcantara <[email protected]> Reviewed-by: Jian He <[email protected]>

This patch introduces JSONB member access using dot notation that aligns with the JSON simplified accessor specified in SQL:2023. Examples: -- Setup create table t(x int, y jsonb); insert into t select 1, '{"a": 1, "b": 42}'::jsonb; insert into t select 1, '{"a": 2, "b": {"c": 42}}'::jsonb; insert into t select 1, '{"a": 3, "b": {"c": "42"}, "d":[11, 12]}'::jsonb; -- Existing syntax in PostgreSQL that predates the SQL standard: select (t.y)->'b' from t; select (t.y)->'b'->'c' from t; select (t.y)->'d'->0 from t; -- JSON simplified accessor specified by the SQL standard: select (t.y).b from t; select (t.y).b.c from t; select (t.y).d[0] from t; The SQL standard states that simplified access is equivalent to: JSON_QUERY (VEP, 'lax $.JC' WITH CONDITIONAL ARRAY WRAPPER NULL ON EMPTY NULL ON ERROR) where: VEP = <value expression primary> JC = <JSON simplified accessor op chain> For example, the JSON_QUERY equivalents of the above queries are: select json_query(y, 'lax $.b' WITH CONDITIONAL ARRAY WRAPPER NULL ON EMPTY NULL ON ERROR) from t; select json_query(y, 'lax $.b.c' WITH CONDITIONAL ARRAY WRAPPER NULL ON EMPTY NULL ON ERROR) from t; select json_query(y, 'lax $.d[0]' WITH CONDITIONAL ARRAY WRAPPER NULL ON EMPTY NULL ON ERROR) from t; Implementation details: Extends the existing container subscripting interface to support container-specific information, specifically a JSONPath expression for jsonb. During query transformation, if dot-notation is present, constructs a JSONPath expression representing the access chain. During execution, if a JSONPath expression is present in JsonbSubWorkspace, executes it via JsonPathQuery(). Does not transform accessors directly into JSON_QUERY during transformation to preserve the original query structure for EXPLAIN and CREATE VIEW. Co-authored-by: Nikita Glukhov <[email protected]> Co-authored-by: Alexandra Wang <[email protected]> Reviewed-by: Andrew Dunstan <[email protected]> Reviewed-by: Matheus Alcantara <[email protected]> Reviewed-by: Mark Dilger <[email protected]> Reviewed-by: Jian He <[email protected]> Reviewed-by: Vik Fearing <[email protected]> Reviewed-by: Nikita Malakhov <[email protected]> Reviewed-by: Peter Eisentraut <[email protected]> Tested-by: Jelte Fennema-Nio <[email protected]>

Previously, slicing was not supported for jsonb subscripting. This commit implements subscripting with slicing as part of the JSON simplified accessor syntax specified in SQL:2023. Co-authored-by: Nikita Glukhov <[email protected]> Co-authored-by: Alexandra Wang <[email protected]> Reviewed-by: Andrew Dunstan <[email protected]> Reviewed-by: Matheus Alcantara <[email protected]> Reviewed-by: Mark Dilger <[email protected]> Reviewed-by: Jian He <[email protected]> Reviewed-by: Vik Fearing <[email protected]> Reviewed-by: Nikita Malakhov <[email protected]> Reviewed-by: Peter Eisentraut <[email protected]> Tested-by: Mark Dilger <[email protected]> Tested-by: Jian He <[email protected]>

This commit adds support for wildcard member access in jsonb, as specified by the JSON simplified accessor syntax in SQL:2023. Co-authored-by: Nikita Glukhov <[email protected]> Co-authored-by: Alexandra Wang <[email protected]> Reviewed-by: Andrew Dunstan <[email protected]> Reviewed-by: Matheus Alcantara <[email protected]> Reviewed-by: Mark Dilger <[email protected]> Reviewed-by: Jian He <[email protected]> Reviewed-by: Vik Fearing <[email protected]> Reviewed-by: Nikita Malakhov <[email protected]> Reviewed-by: Peter Eisentraut <[email protected]> Reviewed-by: Jelte Fennema-Nio <[email protected]> Tested-by: Jelte Fennema-Nio <[email protected]>

This branch was automatically generated by a robot using patches from an email thread registered at: https://commitfest.postgresql.org/patch/5214 The branch will be overwritten each time a new patch version is posted to the thread, and also periodically to check for bitrot caused by changes on the master branch. Patch(es): https://www.postgresql.org/message-id/CAK98qZ0whQ=c+JGXbGSEBxCtLgy6sf-YGYqsKTAGsS-wt0wj+A@mail.gmail.com Author(s): Alexandra Wang

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Commits on Jul 11, 2025

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