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This patch adds support for a new SQL command: ALTER SUBSCRIPTION ... REFRESH SEQUENCES This command updates the sequence entries present in the pg_subscription_rel catalog table with the INIT state to trigger resynchronization. In addition to the new command, the following subscription commands have been enhanced to automatically refresh sequence mappings: ALTER SUBSCRIPTION ... REFRESH PUBLICATION ALTER SUBSCRIPTION ... ADD PUBLICATION ALTER SUBSCRIPTION ... DROP PUBLICATION ALTER SUBSCRIPTION ... SET PUBLICATION These commands will perform the following actions: Add newly published sequences that are not yet part of the subscription. Remove sequences that are no longer included in the publication. This ensures that sequence replication remains aligned with the current state of the publication on the publisher side. Note that the actual synchronization of sequence data/values will be handled in a subsequent patch that introduces a dedicated sequence sync worker. Author: Vignesh C <vignesh21@gmail.com> Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Reviewed-by: shveta malik <shveta.malik@gmail.com> Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com> Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com> Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com> Reviewed-by: Peter Smith <smithpb2250@gmail.com> Reviewed-by: Nisha Moond <nisha.moond412@gmail.com> Reviewed-by: Shlok Kyal <shlok.kyal.oss@gmail.com> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Hou Zhijie <houzj.fnst@fujitsu.com> Discussion: https://postgr.es/m/CAA4eK1LC+KJiAkSrpE_NwvNdidw9F2os7GERUeSxSKv71gXysQ@mail.gmail.com
src/backend/parser/README Parser ====== This directory does more than tokenize and parse SQL queries. It also creates Query structures for the various complex queries that are passed to the optimizer and then executor. parser.c things start here scan.l break query into tokens scansup.c handle escapes in input strings gram.y parse the tokens and produce a "raw" parse tree analyze.c top level of parse analysis for optimizable queries parse_agg.c handle aggregates, like SUM(col1), AVG(col2), ... parse_clause.c handle clauses like WHERE, ORDER BY, GROUP BY, ... parse_coerce.c handle coercing expressions to different data types parse_collate.c assign collation information in completed expressions parse_cte.c handle Common Table Expressions (WITH clauses) parse_expr.c handle expressions like col, col + 3, x = 3 or x = 4 parse_enr.c handle ephemeral named rels (trigger transition tables, ...) parse_func.c handle functions, table.column and column identifiers parse_jsontable.c handle JSON_TABLE parse_merge.c handle MERGE parse_node.c create nodes for various structures parse_oper.c handle operators in expressions parse_param.c handle Params (for the cases used in the core backend) parse_relation.c support routines for tables and column handling parse_target.c handle the result list of the query parse_type.c support routines for data type handling parse_utilcmd.c parse analysis for utility commands (done at execution time) See also src/common/keywords.c, which contains the table of standard keywords and the keyword lookup function. We separated that out because various frontend code wants to use it too.