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convert back to hstore from jsonb #3

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convert back to hstore from jsonb #3

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25 changes: 9 additions & 16 deletions audit.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,8 @@ CREATE TABLE gis.logged_actions (
application_name text,
client_query text,
action TEXT NOT NULL CHECK (action IN ('I','D','U', 'T')),
row_data jsonb,
changed_fields jsonb,
row_data hstore,
changed_fields hstore,
statement_only boolean not null
);

Expand Down Expand Up @@ -41,8 +41,8 @@ DECLARE
audit_row gis.logged_actions;
include_values boolean;
log_diffs boolean;
h_old jsonb;
h_new jsonb;
h_old hstore;
h_new hstore;
excluded_cols text[] = ARRAY[]::text[];
BEGIN
IF TG_WHEN <> 'AFTER' THEN
Expand Down Expand Up @@ -73,23 +73,16 @@ BEGIN
END IF;

IF (TG_OP = 'UPDATE' AND TG_LEVEL = 'ROW') THEN
audit_row.row_data = row_to_json(OLD)::JSONB - excluded_cols;

--Computing differences
SELECT
jsonb_object_agg(tmp_new_row.key, tmp_new_row.value) AS new_data
INTO audit_row.changed_fields
FROM jsonb_each_text(row_to_json(NEW)::JSONB) AS tmp_new_row
JOIN jsonb_each_text(audit_row.row_data) AS tmp_old_row ON (tmp_new_row.key = tmp_old_row.key AND tmp_new_row.value IS DISTINCT FROM tmp_old_row.value);

IF audit_row.changed_fields = '{}'::JSONB THEN
audit_row.row_data = hstore(OLD.*) - excluded_cols;
audit_row.changed_fields = (hstore(NEW.*) - audit_row.row_data) - excluded_cols;
IF audit_row.changed_fields = hstore('') THEN
-- All changed fields are ignored. Skip this update.
RETURN NULL;
END IF;
ELSIF (TG_OP = 'DELETE' AND TG_LEVEL = 'ROW') THEN
audit_row.row_data = row_to_json(OLD)::JSONB - excluded_cols;
audit_row.row_data = hstore(OLD.*) - excluded_cols;
ELSIF (TG_OP = 'INSERT' AND TG_LEVEL = 'ROW') THEN
audit_row.row_data = row_to_json(NEW)::JSONB - excluded_cols;
audit_row.row_data = hstore(NEW.*) - excluded_cols;
ELSIF (TG_LEVEL = 'STATEMENT' AND TG_OP IN ('INSERT','UPDATE','DELETE','TRUNCATE')) THEN
audit_row.statement_only = 't';
ELSE
Expand Down