post_parse_analyze_hook

中文定义与说明

供插件在语法分析后的语义分析结束时接管处理的钩子。

以下中文为本站依据所列 PostgreSQL 源码注释编译的说明。

接口声明

typedef void (*post_parse_analyze_hook_type) (ParseState *pstate, Query *query, JumbleState *jstate);
extern PGDLLIMPORT post_parse_analyze_hook_type post_parse_analyze_hook;

调用位置

• src/backend/commands/explain.c:194
• src/backend/commands/explain.c:427
• src/backend/commands/explain.c:453
• src/backend/parser/analyze.c:128
• src/backend/parser/analyze.c:170
• src/backend/parser/analyze.c:207

核心调用上下文：src/backend/commands/explain.c:188–202

	/* Extract the query and, if enabled, jumble it */
	query = castNode(Query, stmt->query);
	if (IsQueryIdEnabled())
		jstate = JumbleQuery(query);

	if (post_parse_analyze_hook)
		(*post_parse_analyze_hook) (pstate, query, jstate);

	/*
	 * Parse analysis was done already, but we still have to run the rule
	 * rewriter.  We do not do AcquireRewriteLocks: we assume the query either
	 * came straight from the parser, or suitable locks were acquired by
	 * plancache.c.
	 */
	rewritten = QueryRewrite(castNode(Query, stmt->query));

核心调用上下文：src/backend/commands/explain.c:421–435

		}

		ctas_query = castNode(Query, copyObject(ctas->query));
		if (IsQueryIdEnabled())
			jstate = JumbleQuery(ctas_query);
		if (post_parse_analyze_hook)
			(*post_parse_analyze_hook) (pstate, ctas_query, jstate);
		rewritten = QueryRewrite(ctas_query);
		Assert(list_length(rewritten) == 1);
		ExplainOneQuery(linitial_node(Query, rewritten),
						CURSOR_OPT_PARALLEL_OK, ctas->into, es,
						pstate, params);
	}
	else if (IsA(utilityStmt, DeclareCursorStmt))
	{

核心调用上下文：src/backend/commands/explain.c:447–461

		JumbleState *jstate = NULL;

		dcs_query = castNode(Query, copyObject(dcs->query));
		if (IsQueryIdEnabled())
			jstate = JumbleQuery(dcs_query);
		if (post_parse_analyze_hook)
			(*post_parse_analyze_hook) (pstate, dcs_query, jstate);

		rewritten = QueryRewrite(dcs_query);
		Assert(list_length(rewritten) == 1);
		ExplainOneQuery(linitial_node(Query, rewritten),
						dcs->options, NULL, es,
						pstate, params);
	}
	else if (IsA(utilityStmt, ExecuteStmt))